Update project and tests

Gracefully handle package downgrade (fix #350)

.github/CONTRIBUTING.md

@@ -0,0 +1,47 @@
+# Contributing to Traccar
+
+Please make sure you read this guide before commenting on any issue or creating a new issue or pull request.
+
+Before asking anything, please search for an answer in:
+
+- [Traccar documentation](https://www.traccar.org/documentation/)
+- [Traccar forums](https://www.traccar.org/forums/)
+- Relevant repositories (see below)
+- [Google Search](https://www.google.com/)
+
+GitHub issues should be used ONLY for feature requests, code discussions and bug reports. For general discussions please use [Traccar forums](https://www.traccar.org/forums/).
+
+There are multiple Traccar projects. If you create a new issue you MUST do it in the relevant repository:
+
+- [Traccar Server](https://github.com/tananaev/traccar/issues)
+- [Traccar Web Interface](https://github.com/tananaev/traccar-web/issues)
+- [Traccar Client for Android](https://github.com/tananaev/traccar-client-android/issues)
+- [Traccar Client for iOS](https://github.com/tananaev/traccar-client-ios/issues)
+- [Traccar Manager for Android](https://github.com/tananaev/traccar-manager-android/issues)
+- [Traccar Manager for iOS](https://github.com/tananaev/traccar-manager-ios/issues)
+
+If you are not sure where your issue belongs to, please use Traccar Server main repository.
+
+If you want to discuss something that applies to both Android and iOS apps, please use Android repository.
+
+## Bug Reports
+
+Before creating a bug report make sure that you have tested latest official release with default configuration.
+
+Only create a bug report issue if you are confident that there is a problem in Traccar software.
+
+Provide as much details as possible, including log fragments, operating system and hardware information.
+
+## Feature Requests
+
+Before creating a feature request make sure that the feature or modification that you are requesting is not yet implemented.
+
+Search reposiroty to ensure that there is no existing issues for your request. If there is, add a new comment on that issue.
+
+Provide as much details as possible, including use case for your feature and any benefits that you can think of.
+
+## Pull Requests
+
+If you want to contribute some code to Traccar, it is recommended to discuss your solution with maintainers before starting any work.
+
+Any code that you want to contribute must be of high quality and follow existing code patterns and styles.

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,7 @@
+<!--
+
+Do you want to ask a question? Traccar official forum is the best place for getting support:
+
+https://www.traccar.org/forums/
+
+-->

.gitignore

@@ -3,3 +3,5 @@
 local.properties
 *.iml
 build/
+.DS_Store
+google-services.json

LICENSE.txt

@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

README.md

@@ -1,15 +1,15 @@
 # [Traccar Client for Android](https://www.traccar.org/client)
 
-## Contacts
+[![Get it on Google Play](http://www.tananaev.com/badges/google-play.svg)](https://play.google.com/store/apps/details?id=org.traccar.client) [![Get it on F-Droid](http://www.tananaev.com/badges/f-droid.svg)](https://f-droid.org/repository/browse/?fdid=org.traccar.client)
-
-Author - Anton Tananaev ([anton.tananaev@gmail.com](mailto:anton.tananaev@gmail.com))
-
-Website - [https://www.traccar.org/client](https://www.traccar.org/client)
 
 ## Overview
 
 Traccar Client is an Android GPS tracking application. It can work with Traccar open source server software.
 
+## Team
+
+- Anton Tananaev ([anton@traccar.org](mailto:anton@traccar.org))
+
 ## License
 
     Apache License, Version 2.0

app/build.gradle

@@ -1,60 +1,63 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 23
+    compileSdkVersion 29
-    buildToolsVersion '23.0.3'
 
     defaultConfig {
-        minSdkVersion 3
+        applicationId 'org.traccar.client'
-        targetSdkVersion 23
+        buildConfigField 'boolean', 'HIDDEN_APP', 'false'
-        versionCode 31
+        minSdkVersion 16
-        versionName '3.11'
+        targetSdkVersion 29
-    }
+        versionCode 64
-
+        versionName '6.3'
-    signingConfigs {
-        release {
-            storeFile file('../../android.keystore')
-            keyAlias 'tananaev'
-            storePassword ''
-            keyPassword ''
-        }
-    }
-
-    productFlavors {
-        regular {
-            applicationId "org.traccar.client"
-            buildConfigField "boolean", "HIDDEN_APP", "false"
-        }
-        hidden {
-            applicationId "org.traccar.client.hidden"
-            buildConfigField "boolean", "HIDDEN_APP", "true"
-        }
-    }
-
-    buildTypes {
-        release {
-            minifyEnabled false
-            signingConfig signingConfigs.release
-        }
     }
 
     lintOptions {
         checkReleaseBuilds false
     }
+
+    flavorDimensions 'default'
+    productFlavors {
+        regular {
+            isDefault.set(true)
+        }
+        google
+        hidden {
+            applicationId 'org.traccar.client.hidden'
+            buildConfigField 'boolean', 'HIDDEN_APP', 'true'
+        }
+    }
+
+    testOptions {
+        unitTests {
+            includeAndroidResources = true
+        }
+    }
 }
 
 dependencies {
-    testCompile 'junit:junit:4.12'
+    implementation 'com.google.android.material:material:1.3.0-alpha01'
-    testCompile 'org.robolectric:robolectric:3.0'
+    implementation 'androidx.preference:preference:1.1.1'
+    testImplementation 'junit:junit:4.13'
+    testImplementation 'org.robolectric:robolectric:4.1'
+    googleImplementation 'com.google.firebase:firebase-core:17.4.3'
+    googleImplementation 'com.crashlytics.sdk.android:crashlytics:2.10.1'
+    googleImplementation 'com.google.firebase:firebase-analytics:17.4.3'
+    googleImplementation 'com.google.android.gms:play-services-location:17.0.0'
 }
 
-task requestPasswords << {
+if (getGradle().getStartParameter().getTaskRequests().toString().contains('Google')) {
-    android.signingConfigs.release.storePassword = new String(System.console().readPassword('\nStore password: '))
+    apply plugin: 'com.google.gms.google-services'
-    android.signingConfigs.release.keyPassword = new String(System.console().readPassword('Key password: '))
+    apply plugin: 'com.google.firebase.crashlytics'
+
+    task copyJson(type: Copy) {
+        from '../../traccar-shared/google-services'
+        into '.'
+        include 'traccar-client-android.json'
+        rename('traccar-client-android.json', 'google-services.json')
     }
 
-tasks.whenTaskAdded { theTask ->
+    afterEvaluate {
-    if (theTask.name.equals('packageRegularRelease') || theTask.name.equals('packageHiddenRelease')) {
+        preBuild.dependsOn copyJson
-        theTask.dependsOn 'requestPasswords'
     }
 }

app/src/google/AndroidManifest.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <application
+        android:name="org.traccar.client.GoogleMainApplication"
+        tools:replace="android:name"
+        tools:ignore="GoogleAppIndexingWarning">
+
+    </application>
+
+</manifest>

app/src/google/java/org/traccar/client/GoogleMainApplication.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2017 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.client;
+
+import com.google.firebase.analytics.FirebaseAnalytics;
+
+public class GoogleMainApplication extends MainApplication {
+
+    private FirebaseAnalytics firebaseAnalytics;
+
+    @Override
+    public void onCreate() {
+        super.onCreate();
+        firebaseAnalytics = FirebaseAnalytics.getInstance(this);
+    }
+
+}

app/src/google/java/org/traccar/client/GooglePositionProvider.java

@@ -0,0 +1,84 @@
+/*
+ * Copyright 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.client;
+
+import android.annotation.SuppressLint;
+import android.content.Context;
+import android.location.Location;
+
+import com.google.android.gms.location.FusedLocationProviderClient;
+import com.google.android.gms.location.LocationCallback;
+import com.google.android.gms.location.LocationRequest;
+import com.google.android.gms.location.LocationResult;
+import com.google.android.gms.location.LocationServices;
+import com.google.android.gms.tasks.OnSuccessListener;
+
+public class GooglePositionProvider extends PositionProvider {
+
+    private FusedLocationProviderClient fusedLocationClient;
+
+    public GooglePositionProvider(Context context, PositionListener listener) {
+        super(context, listener);
+        fusedLocationClient = LocationServices.getFusedLocationProviderClient(context);
+    }
+
+    @SuppressLint("MissingPermission")
+    public void startUpdates() {
+        LocationRequest locationRequest = new LocationRequest();
+        locationRequest.setPriority(getPriority(preferences.getString(MainFragment.KEY_ACCURACY, "medium")));
+        locationRequest.setInterval(distance > 0 || angle > 0 ? MINIMUM_INTERVAL : interval);
+        fusedLocationClient.requestLocationUpdates(locationRequest, locationCallback, null);
+    }
+
+    public void stopUpdates() {
+        fusedLocationClient.removeLocationUpdates(locationCallback);
+    }
+
+    @SuppressLint("MissingPermission")
+    public void requestSingleLocation() {
+        fusedLocationClient.getLastLocation().addOnSuccessListener(new OnSuccessListener<Location>() {
+            @Override
+            public void onSuccess(Location location) {
+                if (location != null) {
+                    listener.onPositionUpdate(new Position(deviceId, location, getBatteryLevel(context)));
+                }
+            }
+        });
+    }
+
+    private static int getPriority(String accuracy) {
+        switch (accuracy) {
+            case "high":
+                return LocationRequest.PRIORITY_HIGH_ACCURACY;
+            case "low":
+                return LocationRequest.PRIORITY_LOW_POWER;
+            default:
+                return LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY;
+        }
+    }
+
+    private LocationCallback locationCallback = new LocationCallback() {
+        @Override
+        public void onLocationResult(LocationResult locationResult) {
+            if (locationResult != null) {
+                for (Location location : locationResult.getLocations()) {
+                    processLocation(location);
+                }
+            }
+        }
+    };
+
+}

app/src/google/java/org/traccar/client/PositionProviderFactory.java

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.client;
+
+import android.content.Context;
+
+public class PositionProviderFactory {
+
+    public static PositionProvider create(Context context, PositionProvider.PositionListener listener) {
+        return new GooglePositionProvider(context, listener);
+    }
+
+}

app/src/hidden/AndroidManifest.xml

@@ -6,7 +6,17 @@
 
     <application
         android:label="@string/hidden_app_name"
-        tools:replace="label">
+        tools:replace="android:label">
+
+        <activity
+            android:name="org.traccar.client.MainActivity">
+            <intent-filter android:label="@string/app_name">
+                <action android:name="android.intent.action.VIEW" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.BROWSABLE" />
+                <data android:scheme="https" android:host="www.traccar.org" android:pathPrefix="/hidden" />
+            </intent-filter>
+        </activity>
 
         <receiver android:name="org.traccar.client.DialLaunchReceiver" >
             <intent-filter>

app/src/hidden/java/org/traccar/client/PositionProviderFactory.java

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.client;
+
+import android.content.Context;
+
+public class PositionProviderFactory {
+
+    public static PositionProvider create(Context context, PositionProvider.PositionListener listener) {
+        return new AndroidPositionProvider(context, listener);
+    }
+
+}

app/src/hidden/res/drawable/ic_stat_notify.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FFFFFFFF"
+        android:pathData="M12,10c-1.1,0 -2,0.9 -2,2s0.9,2 2,2 2,-0.9 2,-2 -0.9,-2 -2,-2zM19,3L5,3c-1.11,0 -2,0.9 -2,2v14c0,1.1 0.89,2 2,2h14c1.11,0 2,-0.9 2,-2L21,5c0,-1.1 -0.89,-2 -2,-2zM17.25,12c0,0.23 -0.02,0.46 -0.05,0.68l1.48,1.16c0.13,0.11 0.17,0.3 0.08,0.45l-1.4,2.42c-0.09,0.15 -0.27,0.21 -0.43,0.15l-1.74,-0.7c-0.36,0.28 -0.76,0.51 -1.18,0.69l-0.26,1.85c-0.03,0.17 -0.18,0.3 -0.35,0.3h-2.8c-0.17,0 -0.32,-0.13 -0.35,-0.29l-0.26,-1.85c-0.43,-0.18 -0.82,-0.41 -1.18,-0.69l-1.74,0.7c-0.16,0.06 -0.34,0 -0.43,-0.15l-1.4,-2.42c-0.09,-0.15 -0.05,-0.34 0.08,-0.45l1.48,-1.16c-0.03,-0.23 -0.05,-0.46 -0.05,-0.69 0,-0.23 0.02,-0.46 0.05,-0.68l-1.48,-1.16c-0.13,-0.11 -0.17,-0.3 -0.08,-0.45l1.4,-2.42c0.09,-0.15 0.27,-0.21 0.43,-0.15l1.74,0.7c0.36,-0.28 0.76,-0.51 1.18,-0.69l0.26,-1.85c0.03,-0.17 0.18,-0.3 0.35,-0.3h2.8c0.17,0 0.32,0.13 0.35,0.29l0.26,1.85c0.43,0.18 0.82,0.41 1.18,0.69l1.74,-0.7c0.16,-0.06 0.34,0 0.43,0.15l1.4,2.42c0.09,0.15 0.05,0.34 -0.08,0.45l-1.48,1.16c0.03,0.23 0.05,0.46 0.05,0.69z"/>
+</vector>

app/src/hidden/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/light"/>
+    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
+</adaptive-icon>

app/src/hidden/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/light"/>
+    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
+</adaptive-icon>

app/src/main/AndroidManifest.xml

@@ -1,22 +1,38 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+<manifest
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
     package="org.traccar.client">
 
     <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
     <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
+    <uses-permission android:name="android.permission.ACCESS_BACKGROUND_LOCATION" />
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
     <uses-permission android:name="android.permission.WAKE_LOCK" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
     <uses-permission android:name="com.android.launcher.permission.INSTALL_SHORTCUT" />
 
+    <uses-feature android:name="android.hardware.location.network" />
+    <uses-feature android:name="android.hardware.location.gps" />
+
     <application
         android:allowBackup="true"
+        android:networkSecurityConfig="@xml/network_security_config"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
-        android:theme="@style/TraccarTheme">
+        android:theme="@style/AppTheme"
+        android:name=".MainApplication"
+        tools:ignore="GoogleAppIndexingWarning">
 
-        <activity android:name=".MainActivity" android:launchMode="singleTask" />
+        <meta-data
+            android:name="google_analytics_adid_collection_enabled"
+            android:value="false" />
+
+        <activity
+            android:name=".MainActivity"
+            android:launchMode="singleTask" />
 
         <activity-alias
             android:name=".Launcher"
@@ -25,27 +41,36 @@
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
+            <meta-data
+                android:name="android.app.shortcuts"
+                android:resource="@xml/shortcuts" />
         </activity-alias>
 
         <activity android:name=".StatusActivity"/>
 
-        <activity android:name=".AboutActivity"/>
-
         <activity
-            android:name=".ShortcutActivity">
+            android:name=".ShortcutActivity"
+            android:label="@string/menu_shortcuts">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
+                <action android:name="android.intent.action.CREATE_SHORTCUT" />
             </intent-filter>
         </activity>
 
-        <service android:name=".TrackingService" />
+        <service
+            android:name=".TrackingService"
+            android:foregroundServiceType="location" />
 
-        <service android:name=".TrackingService$HideNotificationService" />
+        <service
+            android:name=".TrackingService$HideNotificationService" />
 
         <receiver android:name=".AutostartReceiver">
             <intent-filter>
                 <action android:name="android.intent.action.BOOT_COMPLETED" />
             </intent-filter>
+            <intent-filter>
+                <action android:name="android.intent.action.MY_PACKAGE_REPLACED" />
+            </intent-filter>
         </receiver>
 
     </application>

app/src/main/java/android/support/v4/content/WakefulBroadcastReceiver.java

@@ -1,134 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.support.v4.content;
-
-import android.content.BroadcastReceiver;
-import android.content.ComponentName;
-import android.content.Context;
-import android.content.Intent;
-import android.os.PowerManager;
-import android.util.Log;
-import android.util.SparseArray;
-
-/**
- * Helper for the common pattern of implementing a {@link BroadcastReceiver}
- * that receives a device wakeup event and then passes the work off
- * to a {@link android.app.Service}, while ensuring that the
- * device does not go back to sleep during the transition.
- *
- * <p>This class takes care of creating and managing a partial wake lock
- * for you; you must request the {@link android.Manifest.permission#WAKE_LOCK}
- * permission to use it.</p>
- *
- * <h3>Example</h3>
- *
- * <p>A {@link WakefulBroadcastReceiver} uses the method
- * {@link WakefulBroadcastReceiver#startWakefulService startWakefulService()}
- * to start the service that does the work. This method is comparable to
- * {@link android.content.Context#startService startService()}, except that
- * the {@link WakefulBroadcastReceiver} is holding a wake lock when the service
- * starts. The intent that is passed with
- * {@link WakefulBroadcastReceiver#startWakefulService startWakefulService()}
- * holds an extra identifying the wake lock.</p>
- *
- * {@sample development/samples/Support4Demos/src/com/example/android/supportv4/content/SimpleWakefulReceiver.java complete}
- *
- * <p>The service (in this example, an {@link android.app.IntentService}) does
- * some work. When it is finished, it releases the wake lock by calling
- * {@link WakefulBroadcastReceiver#completeWakefulIntent
- * completeWakefulIntent(intent)}. The intent it passes as a parameter
- * is the same intent that the {@link WakefulBroadcastReceiver} originally
- * passed in.</p>
- *
- * {@sample development/samples/Support4Demos/src/com/example/android/supportv4/content/SimpleWakefulService.java complete}
- */
-public abstract class WakefulBroadcastReceiver extends BroadcastReceiver {
-    private static final String EXTRA_WAKE_LOCK_ID = "android.support.content.wakelockid";
-
-    private static final SparseArray<PowerManager.WakeLock> mActiveWakeLocks
-            = new SparseArray<PowerManager.WakeLock>();
-    private static int mNextId = 1;
-
-    /**
-     * Do a {@link android.content.Context#startService(android.content.Intent)
-     * Context.startService}, but holding a wake lock while the service starts.
-     * This will modify the Intent to hold an extra identifying the wake lock;
-     * when the service receives it in {@link android.app.Service#onStartCommand
-     * Service.onStartCommand}, it should pass back the Intent it receives there to
-     * {@link #completeWakefulIntent(android.content.Intent)} in order to release
-     * the wake lock.
-     *
-     * @param context The Context in which it operate.
-     * @param intent The Intent with which to start the service, as per
-     * {@link android.content.Context#startService(android.content.Intent)
-     * Context.startService}.
-     */
-    public static ComponentName startWakefulService(Context context, Intent intent) {
-        synchronized (mActiveWakeLocks) {
-            int id = mNextId;
-            mNextId++;
-            if (mNextId <= 0) {
-                mNextId = 1;
-            }
-
-            intent.putExtra(EXTRA_WAKE_LOCK_ID, id);
-            ComponentName comp = context.startService(intent);
-            if (comp == null) {
-                return null;
-            }
-
-            PowerManager pm = (PowerManager)context.getSystemService(Context.POWER_SERVICE);
-            PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
-                    "wake:" + comp.flattenToShortString());
-            wl.setReferenceCounted(false);
-            wl.acquire(60*1000);
-            mActiveWakeLocks.put(id, wl);
-            return comp;
-        }
-    }
-
-    /**
-     * Finish the execution from a previous {@link #startWakefulService}.  Any wake lock
-     * that was being held will now be released.
-     *
-     * @param intent The Intent as originally generated by {@link #startWakefulService}.
-     * @return Returns true if the intent is associated with a wake lock that is
-     * now released; returns false if there was no wake lock specified for it.
-     */
-    public static boolean completeWakefulIntent(Intent intent) {
-        final int id = intent.getIntExtra(EXTRA_WAKE_LOCK_ID, 0);
-        if (id == 0) {
-            return false;
-        }
-        synchronized (mActiveWakeLocks) {
-            PowerManager.WakeLock wl = mActiveWakeLocks.get(id);
-            if (wl != null) {
-                wl.release();
-                mActiveWakeLocks.remove(id);
-                return true;
-            }
-            // We return true whether or not we actually found the wake lock
-            // the return code is defined to indicate whether the Intent contained
-            // an identifier for a wake lock that it was supposed to match.
-            // We just log a warning here if there is no wake lock found, which could
-            // happen for example if this function is called twice on the same
-            // intent or the process is killed and restarted before processing the intent.
-            Log.w("WakefulBroadcastReceive", "No active wake lock id #" + id);
-            return true;
-        }
-    }
-}

app/src/main/java/org/traccar/client/AboutActivity.java

@@ -1,37 +0,0 @@
-/*
- * Copyright 2012 Anton Tananaev (anton.tananaev@gmail.com)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.traccar.client;
-
-import android.app.Activity;
-import android.content.pm.PackageManager.NameNotFoundException;
-import android.os.Bundle;
-import android.widget.TextView;
-
-public class AboutActivity extends Activity {
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.about);
-
-        TextView title = (TextView) findViewById(R.id.title);
-        try {
-            title.setText(title.getText() + " " + getPackageManager().getPackageInfo(this.getPackageName(), 0).versionName);
-        } catch (NameNotFoundException e) {
-        }
-    }
-
-}

app/src/main/java/org/traccar/client/AndroidPositionProvider.java

@@ -0,0 +1,110 @@
+/*
+ * Copyright 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.client;
+
+import android.annotation.SuppressLint;
+import android.content.Context;
+import android.location.Location;
+import android.location.LocationListener;
+import android.location.LocationManager;
+import android.os.Bundle;
+import android.os.Looper;
+
+public class AndroidPositionProvider extends PositionProvider implements LocationListener {
+
+    private LocationManager locationManager;
+    private String provider;
+
+    public AndroidPositionProvider(Context context, PositionListener listener) {
+        super(context, listener);
+        locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
+        provider = getProvider(preferences.getString(MainFragment.KEY_ACCURACY, "medium"));
+    }
+
+    @SuppressLint("MissingPermission")
+    public void startUpdates() {
+        try {
+            locationManager.requestLocationUpdates(
+                    provider, distance > 0 || angle > 0 ? MINIMUM_INTERVAL : interval, 0, this);
+        } catch (RuntimeException e) {
+            listener.onPositionError(e);
+        }
+    }
+
+    public void stopUpdates() {
+        locationManager.removeUpdates(this);
+    }
+
+    @SuppressLint("MissingPermission")
+    public void requestSingleLocation() {
+        try {
+            Location location = locationManager.getLastKnownLocation(LocationManager.PASSIVE_PROVIDER);
+            if (location != null) {
+                listener.onPositionUpdate(new Position(deviceId, location, getBatteryLevel(context)));
+            } else {
+                locationManager.requestSingleUpdate(provider, new LocationListener() {
+                    @Override
+                    public void onLocationChanged(Location location) {
+                        listener.onPositionUpdate(new Position(deviceId, location, getBatteryLevel(context)));
+                    }
+
+                    @Override
+                    public void onStatusChanged(String provider, int status, Bundle extras) {
+                    }
+
+                    @Override
+                    public void onProviderEnabled(String provider) {
+                    }
+
+                    @Override
+                    public void onProviderDisabled(String provider) {
+                    }
+                }, Looper.myLooper());
+            }
+        } catch (RuntimeException e) {
+            listener.onPositionError(e);
+        }
+    }
+
+    private static String getProvider(String accuracy) {
+        switch (accuracy) {
+            case "high":
+                return LocationManager.GPS_PROVIDER;
+            case "low":
+                return LocationManager.PASSIVE_PROVIDER;
+            default:
+                return LocationManager.NETWORK_PROVIDER;
+        }
+    }
+
+    @Override
+    public void onLocationChanged(Location location) {
+        processLocation(location);
+    }
+
+    @Override
+    public void onStatusChanged(String provider, int status, Bundle extras) {
+    }
+
+    @Override
+    public void onProviderEnabled(String provider) {
+    }
+
+    @Override
+    public void onProviderDisabled(String provider) {
+    }
+
+}

app/src/main/java/org/traccar/client/AutostartReceiver.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013 Anton Tananaev (anton.tananaev@gmail.com)
+ * Copyright 2013 - 2017 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -19,15 +19,14 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.preference.PreferenceManager;
-import android.support.v4.content.WakefulBroadcastReceiver;
 
 public class AutostartReceiver extends WakefulBroadcastReceiver {
     
     @Override
     public void onReceive(Context context, Intent intent) {
         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
-        if (sharedPreferences.getBoolean(MainActivity.KEY_STATUS, false)) {
+        if (sharedPreferences.getBoolean(MainFragment.KEY_STATUS, false)) {
-            startWakefulService(context, new Intent(context, TrackingService.class));
+            startWakefulForegroundService(context, new Intent(context, TrackingService.class));
         }
     }
 

app/src/main/java/org/traccar/client/DatabaseHelper.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 Anton Tananaev (anton.tananaev@gmail.com)
+ * Copyright 2015 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -27,7 +27,7 @@ import java.util.Date;
 
 public class DatabaseHelper extends SQLiteOpenHelper {
 
-    public static final int DATABASE_VERSION = 1;
+    public static final int DATABASE_VERSION = 3;
     public static final String DATABASE_NAME = "traccar.db";
 
     public interface DatabaseHandler<T> {
@@ -79,7 +79,9 @@ public class DatabaseHelper extends SQLiteOpenHelper {
                 "altitude REAL," +
                 "speed REAL," +
                 "course REAL," +
-                "battery REAL)");
+                "accuracy REAL," +
+                "battery REAL," +
+                "mock INTEGER)");
     }
 
     @Override
@@ -88,6 +90,11 @@ public class DatabaseHelper extends SQLiteOpenHelper {
         onCreate(db);
     }
 
+    public void onDowngrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+        db.execSQL("DROP TABLE IF EXISTS position;");
+        onCreate(db);
+    }
+
     public void insertPosition(Position position) {
         ContentValues values = new ContentValues();
         values.put("deviceId", position.getDeviceId());
@@ -97,7 +104,9 @@ public class DatabaseHelper extends SQLiteOpenHelper {
         values.put("altitude", position.getAltitude());
         values.put("speed", position.getSpeed());
         values.put("course", position.getCourse());
+        values.put("accuracy", position.getAccuracy());
         values.put("battery", position.getBattery());
+        values.put("mock", position.getMock() ? 1 : 0);
 
         db.insertOrThrow("position", null, values);
     }
@@ -129,7 +138,9 @@ public class DatabaseHelper extends SQLiteOpenHelper {
                 position.setAltitude(cursor.getDouble(cursor.getColumnIndex("altitude")));
                 position.setSpeed(cursor.getDouble(cursor.getColumnIndex("speed")));
                 position.setCourse(cursor.getDouble(cursor.getColumnIndex("course")));
+                position.setAccuracy(cursor.getDouble(cursor.getColumnIndex("accuracy")));
                 position.setBattery(cursor.getDouble(cursor.getColumnIndex("battery")));
+                position.setMock(cursor.getInt(cursor.getColumnIndex("mock")) > 0);
 
             } else {
                 return null;

app/src/main/java/org/traccar/client/DialLaunchReceiver.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 Anton Tananaev (anton.tananaev@gmail.com)
+ * Copyright 2015 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

app/src/main/java/org/traccar/client/MainActivity.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012 - 2016 Anton Tananaev (anton.tananaev@gmail.com)
+ * Copyright 2017 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -15,261 +15,17 @@
  */
 package org.traccar.client;
 
-import android.Manifest;
-import android.app.AlarmManager;
-import android.app.AlertDialog;
-import android.app.PendingIntent;
-import android.content.ComponentName;
-import android.content.Intent;
-import android.content.SharedPreferences;
-import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
-import android.content.pm.PackageManager;
-import android.os.Build;
 import android.os.Bundle;
-import android.preference.CheckBoxPreference;
+import androidx.annotation.Nullable;
-import android.preference.EditTextPreference;
+import androidx.appcompat.app.AppCompatActivity;
-import android.preference.Preference;
-import android.preference.PreferenceActivity;
-import android.preference.PreferenceManager;
-import android.preference.TwoStatePreference;
-import android.util.Patterns;
-import android.view.Menu;
-import android.view.MenuItem;
 
-import java.util.HashSet;
+public class MainActivity extends AppCompatActivity {
-import java.util.Random;
-import java.util.Set;
-
-@SuppressWarnings("deprecation")
-public class MainActivity extends PreferenceActivity implements OnSharedPreferenceChangeListener {
-
-    public static final String KEY_DEVICE = "id";
-    public static final String KEY_ADDRESS = "address";
-    public static final String KEY_PORT = "port";
-    public static final String KEY_INTERVAL = "interval";
-    public static final String KEY_PROVIDER = "provider";
-    public static final String KEY_STATUS = "status";
-
-    private static final int PERMISSIONS_REQUEST_LOCATION = 2;
-
-    private SharedPreferences sharedPreferences;
-
-    private AlarmManager alarmManager;
-    private PendingIntent alarmIntent;
 
     @Override
-    public void onCreate(Bundle savedInstanceState) {
+    protected void onCreate(@Nullable Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-
+        if (savedInstanceState == null) {
-        if (BuildConfig.HIDDEN_APP) {
+            getSupportFragmentManager().beginTransaction().replace(android.R.id.content, new MainFragment()).commit();
-            removeLauncherIcon();
-        }
-
-        sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
-        addPreferencesFromResource(R.xml.preferences);
-        initPreferences();
-
-        findPreference(KEY_DEVICE).setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
-            @Override
-            public boolean onPreferenceChange(Preference preference, Object newValue) {
-                return newValue != null && !newValue.equals("");
-            }
-        });
-        findPreference(KEY_ADDRESS).setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
-            @Override
-            public boolean onPreferenceChange(Preference preference, Object newValue) {
-                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.FROYO) {
-                    return newValue != null && Patterns.DOMAIN_NAME.matcher((String) newValue).matches();
-                } else {
-                    return newValue != null && !((String) newValue).isEmpty();
-                }
-            }
-        });
-        findPreference(KEY_PORT).setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
-            @Override
-            public boolean onPreferenceChange(Preference preference, Object newValue) {
-                if (newValue != null) {
-                    try {
-                        int value = Integer.parseInt((String) newValue);
-                        if (value > 0 && value <= 65536) {
-                            return true;
-                        }
-                    } catch (NumberFormatException e) {
-                    }
-                }
-                return false;
-            }
-        });
-        findPreference(KEY_INTERVAL).setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
-            @Override
-            public boolean onPreferenceChange(Preference preference, Object newValue) {
-                if (newValue != null) {
-                    try {
-                        Integer.parseInt((String) newValue);
-                        return true;
-                    } catch (NumberFormatException e) {
-                    }
-                }
-                return false;
-            }
-        });
-
-        alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
-        alarmIntent = PendingIntent.getBroadcast(this, 0, new Intent(this, AutostartReceiver.class), 0);
-
-        if (sharedPreferences.getBoolean(KEY_STATUS, false)) {
-            startTrackingService(true, false);
-        }
-    }
-
-    private void removeLauncherIcon() {
-        String className = MainActivity.class.getCanonicalName().replace(".MainActivity", ".Launcher");
-        ComponentName componentName = new ComponentName(getPackageName(), className);
-        PackageManager packageManager = getPackageManager();
-        if (packageManager.getComponentEnabledSetting(componentName) != PackageManager.COMPONENT_ENABLED_STATE_DISABLED) {
-            packageManager.setComponentEnabledSetting(
-                    componentName, PackageManager.COMPONENT_ENABLED_STATE_DISABLED, PackageManager.DONT_KILL_APP);
-
-            AlertDialog.Builder builder = new AlertDialog.Builder(this);
-            builder.setIcon(android.R.drawable.ic_dialog_alert);
-            builder.setMessage(getString(R.string.hidden_alert));
-            builder.setPositiveButton(android.R.string.ok, null);
-            builder.show();
-        }
-    }
-
-    private void addShortcuts(boolean start, int name) {
-        Intent shortcutIntent = new Intent(Intent.ACTION_MAIN);
-        shortcutIntent.setComponent(new ComponentName(getPackageName(), ShortcutActivity.class.getCanonicalName()));
-        shortcutIntent.putExtra(ShortcutActivity.EXTRA_ACTION, start);
-
-        Intent installShortCutIntent = new Intent("com.android.launcher.action.INSTALL_SHORTCUT");
-        installShortCutIntent.putExtra(Intent.EXTRA_SHORTCUT_INTENT, shortcutIntent);
-        installShortCutIntent.putExtra(Intent.EXTRA_SHORTCUT_NAME, getString(name));
-        installShortCutIntent.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE,
-                Intent.ShortcutIconResource.fromContext(this, R.mipmap.ic_launcher));
-
-        sendBroadcast(installShortCutIntent);
-    }
-
-    private boolean hasPermission(String permission) {
-        if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.LOLLIPOP_MR1) {
-            return true;
-        }
-        return checkSelfPermission(permission) == PackageManager.PERMISSION_GRANTED;
-    }
-
-    @Override
-    protected void onResume() {
-        super.onResume();
-        sharedPreferences.registerOnSharedPreferenceChangeListener(this);
-    }
-
-    @Override
-    protected void onPause() {
-        super.onPause();
-        sharedPreferences.unregisterOnSharedPreferenceChangeListener(this);
-    }
-
-    private void setPreferencesEnabled(boolean enabled) {
-        findPreference(KEY_DEVICE).setEnabled(enabled);
-        findPreference(KEY_ADDRESS).setEnabled(enabled);
-        findPreference(KEY_PORT).setEnabled(enabled);
-        findPreference(KEY_INTERVAL).setEnabled(enabled);
-        findPreference(KEY_PROVIDER).setEnabled(enabled);
-    }
-
-    @Override
-    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
-        if (key.equals(KEY_STATUS)) {
-            if (sharedPreferences.getBoolean(KEY_STATUS, false)) {
-                startTrackingService(true, false);
-            } else {
-                stopTrackingService();
-            }
-        } else if (key.equals(KEY_DEVICE)) {
-            findPreference(KEY_DEVICE).setSummary(sharedPreferences.getString(KEY_DEVICE, null));
-        }
-    }
-
-    @Override
-    public boolean onCreateOptionsMenu(Menu menu) {
-        getMenuInflater().inflate(R.menu.main, menu);
-        return super.onCreateOptionsMenu(menu);
-    }
-
-    @Override
-    public boolean onOptionsItemSelected(MenuItem item) {
-        if (item.getItemId() == R.id.status) {
-            startActivity(new Intent(this, StatusActivity.class));
-            return true;
-        } else if (item.getItemId() == R.id.shortcuts) {
-            addShortcuts(true, R.string.shortcut_start);
-            addShortcuts(false, R.string.shortcut_stop);
-            return true;
-        } else if (item.getItemId() == R.id.about) {
-            startActivity(new Intent(this, AboutActivity.class));
-            return true;
-        }
-        return super.onOptionsItemSelected(item);
-    }
-
-    private void initPreferences() {
-        PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
-
-        if (!sharedPreferences.contains(KEY_DEVICE)) {
-            String id = String.valueOf(new Random().nextInt(900000) + 100000);
-            sharedPreferences.edit().putString(KEY_DEVICE, id).commit();
-            ((EditTextPreference) findPreference(KEY_DEVICE)).setText(id);
-        }
-        findPreference(KEY_DEVICE).setSummary(sharedPreferences.getString(KEY_DEVICE, null));
-    }
-
-    private void startTrackingService(boolean checkPermission, boolean permission) {
-        if (checkPermission) {
-            Set<String> missingPermissions = new HashSet<>();
-            if (!hasPermission(Manifest.permission.ACCESS_FINE_LOCATION)) {
-                missingPermissions.add(Manifest.permission.ACCESS_FINE_LOCATION);
-            }
-            if (!hasPermission(Manifest.permission.ACCESS_COARSE_LOCATION)) {
-                missingPermissions.add(Manifest.permission.ACCESS_COARSE_LOCATION);
-            }
-            if (missingPermissions.isEmpty()) {
-                permission = true;
-            } else {
-                requestPermissions(missingPermissions.toArray(new String[missingPermissions.size()]), PERMISSIONS_REQUEST_LOCATION);
-                return;
-            }
-        }
-
-        if (permission) {
-            setPreferencesEnabled(false);
-            startService(new Intent(this, TrackingService.class));
-            alarmManager.setInexactRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP,
-                    15000, 15000, alarmIntent);
-        } else {
-            sharedPreferences.edit().putBoolean(KEY_STATUS, false).commit();
-            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
-                TwoStatePreference preference = (TwoStatePreference) findPreference(KEY_STATUS);
-                preference.setChecked(false);
-            } else {
-                CheckBoxPreference preference = (CheckBoxPreference) findPreference(KEY_STATUS);
-                preference.setChecked(false);
-            }
-        }
-    }
-
-    private void stopTrackingService() {
-        alarmManager.cancel(alarmIntent);
-        stopService(new Intent(this, TrackingService.class));
-        setPreferencesEnabled(true);
-    }
-
-    @Override
-    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
-        if (requestCode == PERMISSIONS_REQUEST_LOCATION) {
-            startTrackingService(false, grantResults[0] == PackageManager.PERMISSION_GRANTED &&
-                    (permissions.length < 2 || grantResults[1] == PackageManager.PERMISSION_GRANTED));
         }
     }
 

app/src/main/java/org/traccar/client/MainApplication.java

@@ -0,0 +1,73 @@
+/*
+ * Copyright 2016 - 2017 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.client;
+
+import android.annotation.TargetApi;
+import android.app.Application;
+import android.app.Notification;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.graphics.Color;
+import android.net.Uri;
+import android.os.Build;
+import android.preference.PreferenceManager;
+
+public class MainApplication extends Application {
+
+    public static final String PRIMARY_CHANNEL = "default";
+
+    @Override
+    public void onCreate() {
+        super.onCreate();
+        System.setProperty("http.keepAliveDuration", String.valueOf(30 * 60 * 1000));
+
+        migrateLegacyPreferences(PreferenceManager.getDefaultSharedPreferences(this));
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            registerChannel();
+        }
+    }
+
+    @TargetApi(Build.VERSION_CODES.O)
+    private void registerChannel() {
+        NotificationChannel channel = new NotificationChannel(
+                PRIMARY_CHANNEL, getString(R.string.channel_default), NotificationManager.IMPORTANCE_MIN);
+        channel.setLightColor(Color.GREEN);
+        channel.setLockscreenVisibility(Notification.VISIBILITY_SECRET);
+        ((NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE)).createNotificationChannel(channel);
+    }
+
+    private void migrateLegacyPreferences(SharedPreferences preferences) {
+        String port = preferences.getString("port", null);
+        if (port != null) {
+            String host = preferences.getString("address", getString(R.string.settings_url_default_value));
+            String scheme = preferences.getBoolean("secure", false) ? "https" : "http";
+
+            Uri.Builder builder = new Uri.Builder();
+            builder.scheme(scheme).encodedAuthority(host + ":" + port).build();
+            SharedPreferences.Editor editor = preferences.edit();
+            editor.putString(MainFragment.KEY_URL, builder.toString());
+
+            editor.remove("port");
+            editor.remove("address");
+            editor.remove("secure");
+            editor.apply();
+        }
+    }
+
+}

app/src/main/java/org/traccar/client/MainFragment.java

@@ -0,0 +1,311 @@
+/*
+ * Copyright 2012 - 2020 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.client;
+
+import android.Manifest;
+import android.app.AlarmManager;
+import android.app.PendingIntent;
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
+import android.content.pm.PackageManager;
+import android.net.Uri;
+import android.os.Build;
+import android.os.Bundle;
+import android.text.InputType;
+import android.util.Log;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
+import android.view.View;
+import android.webkit.URLUtil;
+import android.widget.EditText;
+import android.widget.Toast;
+
+import androidx.annotation.NonNull;
+import androidx.appcompat.app.AlertDialog;
+import androidx.core.content.ContextCompat;
+import androidx.preference.EditTextPreference;
+import androidx.preference.EditTextPreferenceDialogFragmentCompat;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceFragmentCompat;
+import androidx.preference.PreferenceManager;
+import androidx.preference.TwoStatePreference;
+
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Random;
+import java.util.Set;
+
+public class MainFragment extends PreferenceFragmentCompat implements OnSharedPreferenceChangeListener {
+
+    private static final String TAG = MainFragment.class.getSimpleName();
+
+    private static final int ALARM_MANAGER_INTERVAL = 15000;
+
+    public static final String KEY_DEVICE = "id";
+    public static final String KEY_URL = "url";
+    public static final String KEY_INTERVAL = "interval";
+    public static final String KEY_DISTANCE = "distance";
+    public static final String KEY_ANGLE = "angle";
+    public static final String KEY_ACCURACY = "accuracy";
+    public static final String KEY_STATUS = "status";
+    public static final String KEY_BUFFER = "buffer";
+
+    private static final int PERMISSIONS_REQUEST_LOCATION = 2;
+
+    private SharedPreferences sharedPreferences;
+
+    private AlarmManager alarmManager;
+    private PendingIntent alarmIntent;
+
+    @Override
+    public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
+        if (BuildConfig.HIDDEN_APP && Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) {
+            removeLauncherIcon();
+        }
+
+        setHasOptionsMenu(true);
+
+        sharedPreferences = PreferenceManager.getDefaultSharedPreferences(getContext());
+        addPreferencesFromResource(R.xml.preferences);
+        initPreferences();
+
+        findPreference(KEY_DEVICE).setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
+            @Override
+            public boolean onPreferenceChange(Preference preference, Object newValue) {
+                return newValue != null && !newValue.equals("");
+            }
+        });
+        findPreference(KEY_URL).setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
+            @Override
+            public boolean onPreferenceChange(Preference preference, Object newValue) {
+                return (newValue != null) && validateServerURL(newValue.toString());
+            }
+        });
+
+        findPreference(KEY_INTERVAL).setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
+            @Override
+            public boolean onPreferenceChange(Preference preference, Object newValue) {
+                if (newValue != null) {
+                    try {
+                        int value = Integer.parseInt((String) newValue);
+                        return value > 0;
+                    } catch (NumberFormatException e) {
+                        Log.w(TAG, e);
+                    }
+                }
+                return false;
+            }
+        });
+
+        Preference.OnPreferenceChangeListener numberValidationListener = new Preference.OnPreferenceChangeListener() {
+            @Override
+            public boolean onPreferenceChange(Preference preference, Object newValue) {
+                if (newValue != null) {
+                    try {
+                        int value = Integer.parseInt((String) newValue);
+                        return value >= 0;
+                    } catch (NumberFormatException e) {
+                        Log.w(TAG, e);
+                    }
+                }
+                return false;
+            }
+        };
+        findPreference(KEY_DISTANCE).setOnPreferenceChangeListener(numberValidationListener);
+        findPreference(KEY_ANGLE).setOnPreferenceChangeListener(numberValidationListener);
+
+        alarmManager = (AlarmManager) getActivity().getSystemService(Context.ALARM_SERVICE);
+        alarmIntent = PendingIntent.getBroadcast(getActivity(), 0, new Intent(getActivity(), AutostartReceiver.class), 0);
+
+        if (sharedPreferences.getBoolean(KEY_STATUS, false)) {
+            startTrackingService(true, false);
+        }
+
+    }
+
+    public static class NumericEditTextPreferenceDialogFragment extends EditTextPreferenceDialogFragmentCompat {
+
+        public static NumericEditTextPreferenceDialogFragment newInstance(String key) {
+            final NumericEditTextPreferenceDialogFragment fragment = new NumericEditTextPreferenceDialogFragment();
+            final Bundle bundle = new Bundle();
+            bundle.putString(ARG_KEY, key);
+            fragment.setArguments(bundle);
+            return fragment;
+        }
+
+        @Override
+        protected void onBindDialogView(View view) {
+            EditText editText = view.findViewById(android.R.id.edit);
+            editText.setInputType(InputType.TYPE_CLASS_NUMBER);
+            super.onBindDialogView(view);
+        }
+
+    }
+
+    @Override
+    public void onDisplayPreferenceDialog(Preference preference) {
+        if (Arrays.asList(KEY_INTERVAL, KEY_DISTANCE, KEY_ANGLE).contains(preference.getKey())) {
+            final EditTextPreferenceDialogFragmentCompat f = NumericEditTextPreferenceDialogFragment.newInstance(preference.getKey());
+            f.setTargetFragment(this, 0);
+            f.show(getFragmentManager(), "androidx.preference.PreferenceFragment.DIALOG");
+        } else {
+            super.onDisplayPreferenceDialog(preference);
+        }
+    }
+
+    private void removeLauncherIcon() {
+        String className = MainActivity.class.getCanonicalName().replace(".MainActivity", ".Launcher");
+        ComponentName componentName = new ComponentName(getActivity().getPackageName(), className);
+        PackageManager packageManager = getActivity().getPackageManager();
+        if (packageManager.getComponentEnabledSetting(componentName) != PackageManager.COMPONENT_ENABLED_STATE_DISABLED) {
+            packageManager.setComponentEnabledSetting(
+                    componentName, PackageManager.COMPONENT_ENABLED_STATE_DISABLED, PackageManager.DONT_KILL_APP);
+
+            AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
+            builder.setIcon(android.R.drawable.ic_dialog_alert);
+            builder.setMessage(getString(R.string.hidden_alert));
+            builder.setPositiveButton(android.R.string.ok, null);
+            builder.show();
+        }
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        sharedPreferences.registerOnSharedPreferenceChangeListener(this);
+    }
+
+    @Override
+    public void onPause() {
+        super.onPause();
+        sharedPreferences.unregisterOnSharedPreferenceChangeListener(this);
+    }
+
+    private void setPreferencesEnabled(boolean enabled) {
+        findPreference(KEY_DEVICE).setEnabled(enabled);
+        findPreference(KEY_URL).setEnabled(enabled);
+        findPreference(KEY_INTERVAL).setEnabled(enabled);
+        findPreference(KEY_DISTANCE).setEnabled(enabled);
+        findPreference(KEY_ANGLE).setEnabled(enabled);
+        findPreference(KEY_ACCURACY).setEnabled(enabled);
+        findPreference(KEY_BUFFER).setEnabled(enabled);
+    }
+
+    @Override
+    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
+        if (key.equals(KEY_STATUS)) {
+            if (sharedPreferences.getBoolean(KEY_STATUS, false)) {
+                startTrackingService(true, false);
+            } else {
+                stopTrackingService();
+            }
+        } else if (key.equals(KEY_DEVICE)) {
+            findPreference(KEY_DEVICE).setSummary(sharedPreferences.getString(KEY_DEVICE, null));
+        }
+    }
+
+    @Override
+    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
+        inflater.inflate(R.menu.main, menu);
+        super.onCreateOptionsMenu(menu, inflater);
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        if (item.getItemId() == R.id.status) {
+            startActivity(new Intent(getActivity(), StatusActivity.class));
+            return true;
+        }
+        return super.onOptionsItemSelected(item);
+    }
+
+    private void initPreferences() {
+        PreferenceManager.setDefaultValues(getActivity(), R.xml.preferences, false);
+
+        if (!sharedPreferences.contains(KEY_DEVICE)) {
+            String id = String.valueOf(new Random().nextInt(900000) + 100000);
+            sharedPreferences.edit().putString(KEY_DEVICE, id).apply();
+            ((EditTextPreference) findPreference(KEY_DEVICE)).setText(id);
+        }
+        findPreference(KEY_DEVICE).setSummary(sharedPreferences.getString(KEY_DEVICE, null));
+    }
+
+    private void startTrackingService(boolean checkPermission, boolean permission) {
+        if (checkPermission) {
+            Set<String> requiredPermissions = new HashSet<>();
+            if (ContextCompat.checkSelfPermission(getContext(), Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
+                requiredPermissions.add(Manifest.permission.ACCESS_FINE_LOCATION);
+            }
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q
+                    && ContextCompat.checkSelfPermission(getContext(), Manifest.permission.ACCESS_BACKGROUND_LOCATION) != PackageManager.PERMISSION_GRANTED) {
+                requiredPermissions.add(Manifest.permission.ACCESS_BACKGROUND_LOCATION);
+            }
+            permission = requiredPermissions.isEmpty();
+            if (!permission) {
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+                    requestPermissions(requiredPermissions.toArray(new String[requiredPermissions.size()]), PERMISSIONS_REQUEST_LOCATION);
+                }
+                return;
+            }
+        }
+
+        if (permission) {
+            setPreferencesEnabled(false);
+            ContextCompat.startForegroundService(getContext(), new Intent(getActivity(), TrackingService.class));
+            alarmManager.setInexactRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP,
+                    ALARM_MANAGER_INTERVAL, ALARM_MANAGER_INTERVAL, alarmIntent);
+        } else {
+            sharedPreferences.edit().putBoolean(KEY_STATUS, false).apply();
+            TwoStatePreference preference = findPreference(KEY_STATUS);
+            preference.setChecked(false);
+        }
+    }
+
+    private void stopTrackingService() {
+        alarmManager.cancel(alarmIntent);
+        getActivity().stopService(new Intent(getActivity(), TrackingService.class));
+        setPreferencesEnabled(true);
+    }
+
+    @Override
+    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+        if (requestCode == PERMISSIONS_REQUEST_LOCATION) {
+            boolean granted = true;
+            for (int result : grantResults) {
+                if (result != PackageManager.PERMISSION_GRANTED) {
+                    granted = false;
+                    break;
+                }
+            }
+            startTrackingService(false, granted);
+        }
+    }
+
+    private boolean validateServerURL(String userUrl) {
+        int port = Uri.parse(userUrl).getPort();
+        if (URLUtil.isValidUrl(userUrl) && (port == -1 || (port > 0 && port <= 65535))
+                && (URLUtil.isHttpUrl(userUrl) || URLUtil.isHttpsUrl(userUrl))) {
+            return true;
+        }
+        Toast.makeText(getActivity(), R.string.error_msg_invalid_url, Toast.LENGTH_LONG).show();
+        return false;
+    }
+
+}

app/src/main/java/org/traccar/client/MixedPositionProvider.java

@@ -1,117 +0,0 @@
-/*
- * Copyright 2015 Anton Tananaev (anton.tananaev@gmail.com)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.traccar.client;
-
-import android.content.Context;
-import android.location.GpsStatus;
-import android.location.Location;
-import android.location.LocationListener;
-import android.location.LocationManager;
-import android.os.Bundle;
-import android.util.Log;
-
-public class MixedPositionProvider extends PositionProvider implements LocationListener, GpsStatus.Listener {
-
-    private static int FIX_TIMEOUT = 30 * 1000;
-
-    private LocationListener backupListener;
-    private long lastFixTime;
-
-    public MixedPositionProvider(Context context, PositionListener listener) {
-        super(context, listener);
-    }
-
-    public void startUpdates() {
-        lastFixTime = System.currentTimeMillis();
-        locationManager.addGpsStatusListener(this);
-        locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, period, 0, this);
-    }
-
-    public void stopUpdates() {
-        locationManager.removeUpdates(this);
-        locationManager.removeGpsStatusListener(this);
-        stopBackupProvider();
-    }
-
-    private void startBackupProvider() {
-        Log.i(TAG, "backup provider start");
-        if (backupListener == null) {
-
-            backupListener = new LocationListener() {
-                @Override
-                public void onLocationChanged(Location location) {
-                    Log.i(TAG, "backup provider location");
-                    updateLocation(location);
-                }
-
-                @Override
-                public void onStatusChanged(String s, int i, Bundle bundle) {
-                }
-
-                @Override
-                public void onProviderEnabled(String s) {
-                }
-
-                @Override
-                public void onProviderDisabled(String s) {
-                }
-            };
-
-            locationManager.requestLocationUpdates(
-                    LocationManager.NETWORK_PROVIDER, period, 0, backupListener);
-        }
-    }
-
-    private void stopBackupProvider() {
-        Log.i(TAG, "backup provider stop");
-        if (backupListener != null) {
-            locationManager.removeUpdates(backupListener);
-            backupListener = null;
-        }
-    }
-
-    @Override
-    public void onLocationChanged(Location location) {
-        Log.i(TAG, "provider location");
-        stopBackupProvider();
-        lastFixTime = System.currentTimeMillis();
-        updateLocation(location);
-    }
-
-    @Override
-    public void onStatusChanged(String provider, int status, Bundle extras) {
-    }
-
-    @Override
-    public void onProviderEnabled(String provider) {
-        Log.i(TAG, "provider enabled");
-        stopBackupProvider();
-    }
-
-    @Override
-    public void onProviderDisabled(String provider) {
-        Log.i(TAG, "provider disabled");
-        startBackupProvider();
-    }
-
-    @Override
-    public void onGpsStatusChanged(int event) {
-        if (backupListener == null && System.currentTimeMillis() - (lastFixTime + period) > FIX_TIMEOUT) {
-            startBackupProvider();
-        }
-    }
-
-}

app/src/main/java/org/traccar/client/NetworkManager.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 Anton Tananaev (anton.tananaev@gmail.com)
+ * Copyright 2015 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

app/src/main/java/org/traccar/client/Position.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 Anton Tananaev (anton.tananaev@gmail.com)
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,6 +16,8 @@
 package org.traccar.client;
 
 import android.location.Location;
+import android.location.LocationManager;
+import android.os.Build;
 
 import java.util.Date;
 
@@ -32,43 +34,123 @@ public class Position {
         altitude = location.getAltitude();
         speed = location.getSpeed() * 1.943844; // speed in knots
         course = location.getBearing();
+        if (location.getProvider() != null && !location.getProvider().equals(LocationManager.GPS_PROVIDER)) {
+            accuracy = location.getAccuracy();
+        }
         this.battery = battery;
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
+            this.mock = location.isFromMockProvider();
+        }
     }
 
     private long id;
-    public long getId() { return id; }
+
-    public void setId(long id) { this.id = id; }
+    public long getId() {
+        return id;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
 
     private String deviceId;
-    public String getDeviceId() { return deviceId; }
+
-    public void setDeviceId(String deviceId) { this.deviceId = deviceId; }
+    public String getDeviceId() {
+        return deviceId;
+    }
+
+    public void setDeviceId(String deviceId) {
+        this.deviceId = deviceId;
+    }
 
     private Date time;
-    public Date getTime() { return time; }
+
-    public void setTime(Date time) { this.time = time; }
+    public Date getTime() {
+        return time;
+    }
+
+    public void setTime(Date time) {
+        this.time = time;
+    }
 
     private double latitude;
-    public double getLatitude() { return latitude; }
+
-    public void setLatitude(double latitude) { this.latitude = latitude; }
+    public double getLatitude() {
+        return latitude;
+    }
+
+    public void setLatitude(double latitude) {
+        this.latitude = latitude;
+    }
 
     private double longitude;
-    public double getLongitude() { return longitude; }
+
-    public void setLongitude(double longitude) { this.longitude = longitude; }
+    public double getLongitude() {
+        return longitude;
+    }
+
+    public void setLongitude(double longitude) {
+        this.longitude = longitude;
+    }
 
     private double altitude;
-    public double getAltitude() { return altitude; }
+
-    public void setAltitude(double altitude) { this.altitude = altitude; }
+    public double getAltitude() {
+        return altitude;
+    }
+
+    public void setAltitude(double altitude) {
+        this.altitude = altitude;
+    }
 
     private double speed;
-    public double getSpeed() { return speed; }
+
-    public void setSpeed(double speed) { this.speed = speed; }
+    public double getSpeed() {
+        return speed;
+    }
+
+    public void setSpeed(double speed) {
+        this.speed = speed;
+    }
 
     private double course;
-    public double getCourse() { return course; }
+
-    public void setCourse(double course) { this.course = course; }
+    public double getCourse() {
+        return course;
+    }
+
+    public void setCourse(double course) {
+        this.course = course;
+    }
+
+    private double accuracy;
+
+    public double getAccuracy() {
+        return accuracy;
+    }
+
+    public void setAccuracy(double accuracy) {
+        this.accuracy = accuracy;
+    }
 
     private double battery;
-    public double getBattery() { return battery; }
+
-    public void setBattery(double battery) { this.battery = battery; }
+    public double getBattery() {
+        return battery;
+    }
+
+    public void setBattery(double battery) {
+        this.battery = battery;
+    }
+
+    private boolean mock;
+
+    public boolean getMock() {
+        return mock;
+    }
+
+    public void setMock(boolean mock) {
+        this.mock = mock;
+    }
 
 }

app/src/main/java/org/traccar/client/PositionProvider.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013 - 2015 Anton Tananaev (anton.tananaev@gmail.com)
+ * Copyright 2013 - 2019 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -15,75 +15,77 @@
  */
 package org.traccar.client;
 
-import android.annotation.TargetApi;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.content.SharedPreferences;
 import android.location.Location;
-import android.location.LocationManager;
 import android.os.BatteryManager;
-import android.os.Build;
 import android.preference.PreferenceManager;
 import android.util.Log;
 
 public abstract class PositionProvider {
 
-    protected static final String TAG = PositionProvider.class.getSimpleName();
+    private static final String TAG = PositionProvider.class.getSimpleName();
+
+    protected static final int MINIMUM_INTERVAL = 1000;
 
     public interface PositionListener {
         void onPositionUpdate(Position position);
+        void onPositionError(Throwable error);
     }
 
-    private final PositionListener listener;
+    protected final PositionListener listener;
 
-    private final Context context;
+    protected final Context context;
-    private final SharedPreferences preferences;
+    protected SharedPreferences preferences;
-    protected final LocationManager locationManager;
 
-    private String deviceId;
+    protected String deviceId;
-    protected String type;
+    protected long interval;
-    protected final long period;
+    protected double distance;
+    protected double angle;
 
-    private long lastUpdateTime;
+    protected Location lastLocation;
 
     public PositionProvider(Context context, PositionListener listener) {
         this.context = context;
         this.listener = listener;
 
         preferences = PreferenceManager.getDefaultSharedPreferences(context);
-        locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
 
-        deviceId = preferences.getString(MainActivity.KEY_DEVICE, null);
+        deviceId = preferences.getString(MainFragment.KEY_DEVICE, "undefined");
-        period = Integer.parseInt(preferences.getString(MainActivity.KEY_INTERVAL, null)) * 1000;
+        interval = Long.parseLong(preferences.getString(MainFragment.KEY_INTERVAL, "600")) * 1000;
-
+        distance = Integer.parseInt(preferences.getString(MainFragment.KEY_DISTANCE, "0"));
-        type = preferences.getString(MainActivity.KEY_PROVIDER, null);
+        angle = Integer.parseInt(preferences.getString(MainFragment.KEY_ANGLE, "0"));
     }
 
     public abstract void startUpdates();
 
     public abstract void stopUpdates();
 
-    protected void updateLocation(Location location) {
+    public abstract void requestSingleLocation();
-        if (location != null && location.getTime() - lastUpdateTime >= period) {
+
+    protected void processLocation(Location location) {
+        if (location != null && (lastLocation == null
+                || location.getTime() - lastLocation.getTime() >= interval
+                || distance > 0 && location.distanceTo(lastLocation) >= distance
+                || angle > 0 && Math.abs(location.getBearing() - lastLocation.getBearing()) >= angle)) {
             Log.i(TAG, "location new");
-            lastUpdateTime = location.getTime();
+            lastLocation = location;
-            listener.onPositionUpdate(new Position(deviceId, location, getBatteryLevel()));
+            listener.onPositionUpdate(new Position(deviceId, location, getBatteryLevel(context)));
         } else {
-            Log.i(TAG, location != null ? "location old" : "location nil");
+            Log.i(TAG, location != null ? "location ignored" : "location nil");
         }
     }
 
-    @TargetApi(Build.VERSION_CODES.ECLAIR)
+    protected static double getBatteryLevel(Context context) {
-    private double getBatteryLevel() {
-        if (android.os.Build.VERSION.SDK_INT > Build.VERSION_CODES.ECLAIR) {
         Intent batteryIntent = context.registerReceiver(null, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
+        if (batteryIntent != null) {
             int level = batteryIntent.getIntExtra(BatteryManager.EXTRA_LEVEL, 0);
             int scale = batteryIntent.getIntExtra(BatteryManager.EXTRA_SCALE, 1);
             return (level * 100.0) / scale;
-        } else {
-            return 0;
         }
+        return 0;
     }
 
 }

app/src/main/java/org/traccar/client/ProtocolFormatter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012 - 2015 Anton Tananaev (anton.tananaev@gmail.com)
+ * Copyright 2012 - 2016 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -15,15 +15,17 @@
  */
 package org.traccar.client;
 
-import android.location.Location;
 import android.net.Uri;
 
 public class ProtocolFormatter {
 
-    public static String formatRequest(String address, int port, Position position) {
+    public static String formatRequest(String url, Position position) {
+        return formatRequest(url, position, null);
+    }
 
-        Uri.Builder builder = new Uri.Builder();
+    public static String formatRequest(String url, Position position, String alarm) {
-        builder.scheme("http").encodedAuthority(address + ':' + port)
+        Uri serverUrl = Uri.parse(url);
+        Uri.Builder builder = serverUrl.buildUpon()
                 .appendQueryParameter("id", position.getDeviceId())
                 .appendQueryParameter("timestamp", String.valueOf(position.getTime().getTime() / 1000))
                 .appendQueryParameter("lat", String.valueOf(position.getLatitude()))
@@ -31,9 +33,17 @@ public class ProtocolFormatter {
                 .appendQueryParameter("speed", String.valueOf(position.getSpeed()))
                 .appendQueryParameter("bearing", String.valueOf(position.getCourse()))
                 .appendQueryParameter("altitude", String.valueOf(position.getAltitude()))
+                .appendQueryParameter("accuracy", String.valueOf(position.getAccuracy()))
                 .appendQueryParameter("batt", String.valueOf(position.getBattery()));
 
+        if (position.getMock()) {
+            builder.appendQueryParameter("mock", String.valueOf(position.getMock()));
+        }
+
+        if (alarm != null) {
+            builder.appendQueryParameter("alarm", alarm);
+        }
+
         return builder.build().toString();
     }
-
 }

app/src/main/java/org/traccar/client/RequestManager.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 Anton Tananaev (anton.tananaev@gmail.com)
+ * Copyright 2015 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,6 +16,7 @@
 package org.traccar.client;
 
 import android.os.AsyncTask;
+import android.util.Log;
 
 import java.io.IOException;
 import java.io.InputStream;
@@ -56,6 +57,7 @@ public class RequestManager {
             HttpURLConnection connection = (HttpURLConnection) url.openConnection();
             connection.setReadTimeout(TIMEOUT);
             connection.setConnectTimeout(TIMEOUT);
+            connection.setRequestMethod("POST");
             connection.connect();
             inputStream = connection.getInputStream();
             while (inputStream.read() != -1);
@@ -68,7 +70,7 @@ public class RequestManager {
                     inputStream.close();
                 }
             } catch (IOException secondError) {
-                return false;
+                Log.w(RequestManager.class.getSimpleName(), secondError);
             }
         }
     }

app/src/main/java/org/traccar/client/ShortcutActivity.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 Anton Tananaev (anton.tananaev@gmail.com)
+ * Copyright 2016 - 2019 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -15,42 +15,150 @@
  */
 package org.traccar.client;
 
-import android.app.Activity;
 import android.content.Intent;
+import android.content.SharedPreferences;
+import android.content.pm.PackageManager;
 import android.os.Bundle;
 import android.preference.PreferenceManager;
+import android.view.View;
+import android.widget.AdapterView;
+import android.widget.ArrayAdapter;
+import android.widget.ListView;
 import android.widget.Toast;
 
-public class ShortcutActivity extends Activity {
+import androidx.annotation.DrawableRes;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.core.content.ContextCompat;
+import androidx.core.content.pm.ShortcutInfoCompat;
+import androidx.core.content.pm.ShortcutManagerCompat;
+import androidx.core.graphics.drawable.IconCompat;
 
-    public static final String EXTRA_ACTION = "shortcutAction";
+public class ShortcutActivity extends AppCompatActivity {
+
+    public static final String EXTRA_ACTION = "action";
+    public static final String ACTION_START = "start";
+    public static final String ACTION_STOP = "stop";
+    public static final String ACTION_SOS = "sos";
+
+    private static final String ALARM_SOS = "sos";
 
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        checkShortcutAction(getIntent());
+        if (!executeAction(getIntent())) {
+            setContentView(R.layout.list);
+
+            final String[] items = new String[] {
+                    getString(R.string.shortcut_start),
+                    getString(R.string.shortcut_stop),
+                    getString(R.string.shortcut_sos)
+            };
+
+            ListView listView = findViewById(android.R.id.list);
+
+            listView.setAdapter(new ArrayAdapter<>(
+                    this, android.R.layout.simple_list_item_1, items));
+
+            listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
+                @Override
+                public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
+                    switch (position) {
+                        case 0:
+                            setShortcutResult(items[position], R.mipmap.ic_start, ACTION_START);
+                            break;
+                        case 1:
+                            setShortcutResult(items[position], R.mipmap.ic_stop, ACTION_STOP);
+                            break;
+                        case 2:
+                            setShortcutResult(items[position], R.mipmap.ic_sos, ACTION_SOS);
+                            break;
+                    }
+                    finish();
+                }
+            });
+        }
     }
 
     @Override
     protected void onNewIntent(Intent intent) {
         super.onNewIntent(intent);
-        checkShortcutAction(intent);
+        executeAction(intent);
     }
 
-    private void checkShortcutAction(Intent intent) {
+    private void setShortcutResult(String label, @DrawableRes int iconResId, String action) {
-        if (intent.hasExtra(EXTRA_ACTION)) {
+        Intent intent = new Intent(Intent.ACTION_DEFAULT, null, this, ShortcutActivity.class);
-            boolean start = intent.getBooleanExtra(EXTRA_ACTION, false);
+        intent.putExtra(EXTRA_ACTION, action);
-            PreferenceManager.getDefaultSharedPreferences(this)
+
-                    .edit().putBoolean(MainActivity.KEY_STATUS, start).commit();
+        ShortcutInfoCompat shortcut = new ShortcutInfoCompat.Builder(this, action)
-            if (start) {
+                .setShortLabel(label)
-                startService(new Intent(this, TrackingService.class));
+                .setIcon(IconCompat.createWithResource(this, iconResId))
-                Toast.makeText(this, R.string.status_service_create, Toast.LENGTH_SHORT).show();
+                .setIntent(intent)
+                .build();
+
+        setResult(RESULT_OK, ShortcutManagerCompat.createShortcutResultIntent(this, shortcut));
+    }
+
+    @SuppressWarnings("MissingPermission")
+    private void sendAlarm() {
+        PositionProviderFactory.create(this, new PositionProvider.PositionListener() {
+            @Override
+            public void onPositionUpdate(Position position) {
+                SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(ShortcutActivity.this);
+                String request = ProtocolFormatter.formatRequest(
+                        preferences.getString(MainFragment.KEY_URL, null), position, ALARM_SOS);
+
+                RequestManager.sendRequestAsync(request, new RequestManager.RequestHandler() {
+                    @Override
+                    public void onComplete(boolean success) {
+                        if (success) {
+                            Toast.makeText(ShortcutActivity.this, R.string.status_send_success, Toast.LENGTH_SHORT).show();
                         } else {
+                            Toast.makeText(ShortcutActivity.this, R.string.status_send_fail, Toast.LENGTH_SHORT).show();
+                        }
+                    }
+                });
+            }
+
+            @Override
+            public void onPositionError(Throwable error) {
+                Toast.makeText(ShortcutActivity.this, error.getMessage(), Toast.LENGTH_LONG).show();
+            }
+        }).requestSingleLocation();
+    }
+
+    private boolean executeAction(Intent intent) {
+        String action;
+        if (intent.hasExtra("shortcutAction")) {
+            action = intent.getBooleanExtra("shortcutAction", false)
+                    ? ACTION_START : ACTION_STOP;
+        } else {
+            action = intent.getStringExtra(EXTRA_ACTION);
+        }
+        if (action != null) {
+            switch (action) {
+                case ACTION_START:
+                    PreferenceManager.getDefaultSharedPreferences(this)
+                            .edit().putBoolean(MainFragment.KEY_STATUS, true).apply();
+                    ContextCompat.startForegroundService(this, new Intent(this, TrackingService.class));
+                    Toast.makeText(this, R.string.status_service_create, Toast.LENGTH_SHORT).show();
+                    break;
+                case ACTION_STOP:
+                    PreferenceManager.getDefaultSharedPreferences(this)
+                            .edit().putBoolean(MainFragment.KEY_STATUS, false).apply();
                     stopService(new Intent(this, TrackingService.class));
                     Toast.makeText(this, R.string.status_service_destroy, Toast.LENGTH_SHORT).show();
+                    break;
+                case ACTION_SOS:
+                    if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
+                        sendAlarm();
+                    } else {
+                        Toast.makeText(this, R.string.status_send_fail, Toast.LENGTH_SHORT).show();
+                    }
+                    break;
             }
             finish();
         }
+        return action != null;
     }
 
 }

app/src/main/java/org/traccar/client/SimplePositionProvider.java

@@ -1,58 +0,0 @@
-/*
- * Copyright 2015 Anton Tananaev (anton.tananaev@gmail.com)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.traccar.client;
-
-import android.content.Context;
-import android.location.Location;
-import android.location.LocationListener;
-import android.location.LocationManager;
-import android.os.Bundle;
-
-public class SimplePositionProvider extends PositionProvider implements LocationListener {
-
-    public SimplePositionProvider(Context context, PositionListener listener) {
-        super(context, listener);
-        if (!type.equals(LocationManager.NETWORK_PROVIDER)) {
-            type = LocationManager.GPS_PROVIDER;
-        }
-    }
-
-    public void startUpdates() {
-        locationManager.requestLocationUpdates(type, period, 0, this);
-    }
-
-    public void stopUpdates() {
-        locationManager.removeUpdates(this);
-    }
-
-    @Override
-    public void onLocationChanged(Location location) {
-        updateLocation(location);
-    }
-
-    @Override
-    public void onStatusChanged(String provider, int status, Bundle extras) {
-    }
-
-    @Override
-    public void onProviderEnabled(String provider) {
-    }
-
-    @Override
-    public void onProviderDisabled(String provider) {
-    }
-
-}

app/src/main/java/org/traccar/client/StatusActivity.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012 - 2013 Anton Tananaev (anton.tananaev@gmail.com)
+ * Copyright 2012 - 2017 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,19 +21,20 @@ import java.util.HashSet;
 import java.util.LinkedList;
 import java.util.Set;
 
-import android.app.ListActivity;
 import android.os.Bundle;
+import androidx.appcompat.app.AppCompatActivity;
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.widget.ArrayAdapter;
+import android.widget.ListView;
 
-public class StatusActivity extends ListActivity {
+public class StatusActivity extends AppCompatActivity {
 
     private static final int LIMIT = 20;
 
-    private static final LinkedList<String> messages = new LinkedList<String>();
+    private static final LinkedList<String> messages = new LinkedList<>();
-    private static final Set<ArrayAdapter<String>> adapters = new HashSet<ArrayAdapter<String>>();
+    private static final Set<ArrayAdapter<String>> adapters = new HashSet<>();
 
     private static void notifyAdapters() {
         for (ArrayAdapter<String> adapter : adapters) {
@@ -42,7 +43,7 @@ public class StatusActivity extends ListActivity {
     }
 
     public static void addMessage(String message) {
-        DateFormat format = DateFormat.getTimeInstance(DateFormat.SHORT);
+        DateFormat format = DateFormat.getTimeInstance(DateFormat.MEDIUM);
         message = format.format(new Date()) + " - " + message;
         messages.add(message);
         while (messages.size() > LIMIT) {
@@ -61,9 +62,10 @@ public class StatusActivity extends ListActivity {
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        setContentView(R.layout.status);
+        setContentView(R.layout.list);
-        adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, android.R.id.text1, messages);
+        adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, android.R.id.text1, messages);
-        setListAdapter(adapter);
+        ListView listView = findViewById(android.R.id.list);
+        listView.setAdapter(adapter);
         adapters.add(adapter);
     }
 

app/src/main/java/org/traccar/client/TrackingController.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 Anton Tananaev (anton.tananaev@gmail.com)
+ * Copyright 2015 - 2019 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,9 +17,7 @@ package org.traccar.client;
 
 import android.content.Context;
 import android.content.SharedPreferences;
-import android.os.Build;
 import android.os.Handler;
-import android.os.PowerManager;
 import android.preference.PreferenceManager;
 import android.util.Log;
 
@@ -27,7 +25,7 @@ public class TrackingController implements PositionProvider.PositionListener, Ne
 
     private static final String TAG = TrackingController.class.getSimpleName();
     private static final int RETRY_DELAY = 30 * 1000;
-    private static final int WAKE_LOCK_TIMEOUT = 60 * 1000;
+    private static final int WAKE_LOCK_TIMEOUT = 120 * 1000;
 
     private boolean isOnline;
     private boolean isWaiting;
@@ -36,47 +34,24 @@ public class TrackingController implements PositionProvider.PositionListener, Ne
     private Handler handler;
     private SharedPreferences preferences;
 
-    private String address;
+    private String url;
-    private int port;
+    private boolean buffer;
 
     private PositionProvider positionProvider;
     private DatabaseHelper databaseHelper;
     private NetworkManager networkManager;
 
-    private PowerManager.WakeLock wakeLock;
-
-    private void lock() {
-        if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.GINGERBREAD_MR1) {
-            wakeLock.acquire();
-        } else {
-            wakeLock.acquire(WAKE_LOCK_TIMEOUT);
-        }
-    }
-
-    private void unlock() {
-        if (wakeLock.isHeld()) {
-            wakeLock.release();
-        }
-    }
-
     public TrackingController(Context context) {
         this.context = context;
         handler = new Handler();
         preferences = PreferenceManager.getDefaultSharedPreferences(context);
-        if (preferences.getString(MainActivity.KEY_PROVIDER, null).equals("mixed")) {
+        positionProvider = PositionProviderFactory.create(context, this);
-            positionProvider = new MixedPositionProvider(context, this);
-        } else {
-            positionProvider = new SimplePositionProvider(context, this);
-        }
         databaseHelper = new DatabaseHelper(context);
         networkManager = new NetworkManager(context, this);
         isOnline = networkManager.isOnline();
 
-        address = preferences.getString(MainActivity.KEY_ADDRESS, null);
+        url = preferences.getString(MainFragment.KEY_URL, context.getString(R.string.settings_url_default_value));
-        port = Integer.parseInt(preferences.getString(MainActivity.KEY_PORT, null));
+        buffer = preferences.getBoolean(MainFragment.KEY_BUFFER, true);
-
-        PowerManager powerManager = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
-        wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, getClass().getName());
     }
 
     public void start() {
@@ -105,13 +80,22 @@ public class TrackingController implements PositionProvider.PositionListener, Ne
     public void onPositionUpdate(Position position) {
         StatusActivity.addMessage(context.getString(R.string.status_location_update));
         if (position != null) {
+            if (buffer) {
                 write(position);
+            } else {
+                send(position);
+            }
         }
     }
 
+    @Override
+    public void onPositionError(Throwable error) {
+    }
+
     @Override
     public void onNetworkUpdate(boolean isOnline) {
-        StatusActivity.addMessage(context.getString(R.string.status_connectivity_change));
+        int message = isOnline ? R.string.status_network_online : R.string.status_network_offline;
+        StatusActivity.addMessage(context.getString(message));
         if (!this.isOnline && isOnline) {
             read();
         }
@@ -139,7 +123,6 @@ public class TrackingController implements PositionProvider.PositionListener, Ne
 
     private void write(Position position) {
         log("write", position);
-        lock();
         databaseHelper.insertPositionAsync(position, new DatabaseHelper.DatabaseHandler<Void>() {
             @Override
             public void onComplete(boolean success, Void result) {
@@ -149,20 +132,18 @@ public class TrackingController implements PositionProvider.PositionListener, Ne
                         isWaiting = false;
                     }
                 }
-                unlock();
             }
         });
     }
 
     private void read() {
         log("read", null);
-        lock();
         databaseHelper.selectPositionAsync(new DatabaseHelper.DatabaseHandler<Position>() {
             @Override
             public void onComplete(boolean success, Position result) {
                 if (success) {
                     if (result != null) {
-                        if (result.getDeviceId().equals(preferences.getString(MainActivity.KEY_DEVICE, null))) {
+                        if (result.getDeviceId().equals(preferences.getString(MainFragment.KEY_DEVICE, null))) {
                             send(result);
                         } else {
                             delete(result);
@@ -173,14 +154,12 @@ public class TrackingController implements PositionProvider.PositionListener, Ne
                 } else {
                     retry();
                 }
-                unlock();
             }
         });
     }
 
     private void delete(Position position) {
         log("delete", position);
-        lock();
         databaseHelper.deletePositionAsync(position.getId(), new DatabaseHelper.DatabaseHandler<Void>() {
             @Override
             public void onComplete(boolean success, Void result) {
@@ -189,25 +168,26 @@ public class TrackingController implements PositionProvider.PositionListener, Ne
                 } else {
                     retry();
                 }
-                unlock();
             }
         });
     }
 
     private void send(final Position position) {
         log("send", position);
-        lock();
+        String request = ProtocolFormatter.formatRequest(url, position);
-        String request = ProtocolFormatter.formatRequest(address, port, position);
         RequestManager.sendRequestAsync(request, new RequestManager.RequestHandler() {
             @Override
             public void onComplete(boolean success) {
                 if (success) {
+                    if (buffer) {
                         delete(position);
+                    }
                 } else {
                     StatusActivity.addMessage(context.getString(R.string.status_send_fail));
+                    if (buffer) {
                         retry();
                     }
-                unlock();
+                }
             }
         });
     }

app/src/main/java/org/traccar/client/TrackingService.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012 - 2015 Anton Tananaev (anton.tananaev@gmail.com)
+ * Copyright 2012 - 2019 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -15,52 +15,49 @@
  */
 package org.traccar.client;
 
+import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
 import android.app.Notification;
 import android.app.PendingIntent;
 import android.app.Service;
 import android.content.Context;
 import android.content.Intent;
+import android.content.pm.PackageManager;
 import android.os.Build;
 import android.os.IBinder;
-import android.preference.PreferenceManager;
+import androidx.core.app.NotificationCompat;
-import android.util.Log;
+import androidx.core.content.ContextCompat;
 
-import java.lang.reflect.InvocationTargetException;
+import android.os.PowerManager;
-import java.lang.reflect.Method;
+import android.util.Log;
 
 public class TrackingService extends Service {
 
     private static final String TAG = TrackingService.class.getSimpleName();
     private static final int NOTIFICATION_ID = 1;
 
+    private PowerManager.WakeLock wakeLock;
     private TrackingController trackingController;
 
-    @SuppressWarnings("deprecation")
     private static Notification createNotification(Context context) {
-        Intent notificationIntent = new Intent(context, MainActivity.class);
+        NotificationCompat.Builder builder = new NotificationCompat.Builder(context, MainApplication.PRIMARY_CHANNEL)
-        PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0);
+                .setSmallIcon(R.drawable.ic_stat_notify)
-
+                .setPriority(NotificationCompat.PRIORITY_LOW)
-        Notification notification = new Notification(android.R.drawable.stat_notify_sync_noanim, null, 0);
+                .setCategory(NotificationCompat.CATEGORY_SERVICE);
-        try {
+        Intent intent;
-            Method method = notification.getClass().getMethod("setLatestEventInfo", Context.class, CharSequence.class, CharSequence.class, PendingIntent.class);
+        if (!BuildConfig.HIDDEN_APP) {
-            try {
+            intent = new Intent(context, MainActivity.class);
-                method.invoke(notification, context, context.getString(R.string.app_name), context.getString(R.string.settings_status_on_summary), pendingIntent);
+            builder
-            } catch (IllegalArgumentException | IllegalAccessException | InvocationTargetException e) {
+                .setContentTitle(context.getString(R.string.settings_status_on_summary))
-                Log.w(TAG, e);
+                .setTicker(context.getString(R.string.settings_status_on_summary))
+                .setColor(ContextCompat.getColor(context, R.color.primary_dark));
+        } else {
+            intent = new Intent(android.provider.Settings.ACTION_SETTINGS);
         }
-        } catch (SecurityException | NoSuchMethodException e) {
+        builder.setContentIntent(PendingIntent.getActivity(context, 0, intent, 0));
-            Log.w(TAG, e);
+        return builder.build();
     }
 
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
-            notification.priority = Notification.PRIORITY_MIN;
-        }
-
-        return notification;
-    }
-
-    @TargetApi(Build.VERSION_CODES.ECLAIR)
     public static class HideNotificationService extends Service {
         @Override
         public IBinder onBind(Intent intent) {
@@ -80,17 +77,26 @@ public class TrackingService extends Service {
         }
     }
 
+    @SuppressLint("WakelockTimeout")
     @Override
     public void onCreate() {
         Log.i(TAG, "service create");
         StatusActivity.addMessage(getString(R.string.status_service_create));
 
+        startForeground(NOTIFICATION_ID, createNotification(this));
+
+        if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
+
+            PowerManager powerManager = (PowerManager) getSystemService(Context.POWER_SERVICE);
+            wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, getClass().getName());
+            wakeLock.acquire();
+
             trackingController = new TrackingController(this);
             trackingController.start();
+        }
 
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ECLAIR) {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) {
-            startForeground(NOTIFICATION_ID, createNotification(this));
+            ContextCompat.startForegroundService(this, new Intent(this, HideNotificationService.class));
-            startService(new Intent(this, HideNotificationService.class));
         }
     }
 
@@ -99,18 +105,12 @@ public class TrackingService extends Service {
         return null;
     }
 
-    @SuppressWarnings("deprecation")
-    @Override
-    public void onStart(Intent intent, int startId) {
-        if (intent != null) {
-            AutostartReceiver.completeWakefulIntent(intent);
-        }
-    }
-
     @TargetApi(Build.VERSION_CODES.ECLAIR)
     @Override
     public int onStartCommand(Intent intent, int flags, int startId) {
-        onStart(intent, startId);
+        if (intent != null) {
+            AutostartReceiver.completeWakefulIntent(intent);
+        }
         return START_STICKY;
     }
 
@@ -119,10 +119,11 @@ public class TrackingService extends Service {
         Log.i(TAG, "service destroy");
         StatusActivity.addMessage(getString(R.string.status_service_destroy));
 
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ECLAIR) {
         stopForeground(true);
-        }
 
+        if (wakeLock != null && wakeLock.isHeld()) {
+            wakeLock.release();
+        }
         if (trackingController != null) {
             trackingController.stop();
         }

app/src/main/java/org/traccar/client/WakefulBroadcastReceiver.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.client;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.os.PowerManager;
+import androidx.core.content.ContextCompat;
+import android.util.SparseArray;
+
+public abstract class WakefulBroadcastReceiver extends BroadcastReceiver {
+    private static final String EXTRA_WAKE_LOCK_ID = "android.support.content.wakelockid";
+    private static final SparseArray<PowerManager.WakeLock> mActiveWakeLocks = new SparseArray<>();
+    private static int mNextId = 1;
+
+    public static void startWakefulForegroundService(Context context, Intent intent) {
+        synchronized (mActiveWakeLocks) {
+            int id = mNextId;
+            mNextId++;
+            if (mNextId <= 0) {
+                mNextId = 1;
+            }
+            intent.putExtra(EXTRA_WAKE_LOCK_ID, id);
+            ContextCompat.startForegroundService(context, intent);
+            PowerManager pm = (PowerManager)context.getSystemService(Context.POWER_SERVICE);
+            PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
+                    WakefulBroadcastReceiver.class.getSimpleName());
+            wl.setReferenceCounted(false);
+            wl.acquire(60*1000);
+            mActiveWakeLocks.put(id, wl);
+        }
+    }
+
+    public static boolean completeWakefulIntent(Intent intent) {
+        final int id = intent.getIntExtra(EXTRA_WAKE_LOCK_ID, 0);
+        if (id == 0) {
+            return false;
+        }
+        synchronized (mActiveWakeLocks) {
+            PowerManager.WakeLock wl = mActiveWakeLocks.get(id);
+            if (wl != null) {
+                wl.release();
+                mActiveWakeLocks.remove(id);
+                return true;
+            }
+            return true;
+        }
+    }
+}

app/src/main/res/drawable/ic_stat_notify.xml

@@ -0,0 +1,10 @@
+<vector
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportHeight="72.0"
+    android:viewportWidth="72.0"
+    xmlns:android="http://schemas.android.com/apk/res/android">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M36,0A36,36 0,0 0,0 36A36,36 0,0 0,36 72A36,36 0,0 0,72 36A36,36 0,0 0,36 0zM50.51,14.66C53.41,16.89 55.93,19.68 57.88,23.05C59.83,26.42 60.99,30 61.46,33.63L55.09,34.55C54.72,31.74 53.87,28.85 52.36,26.24C50.85,23.63 48.78,21.45 46.53,19.72L50.51,14.66zM42.82,24.85C44.4,26.08 45.77,27.58 46.84,29.43C47.91,31.27 48.52,33.21 48.79,35.2L42.42,36.12C42.25,34.95 41.95,33.7 41.32,32.61C40.69,31.53 39.77,30.64 38.84,29.91L42.82,24.85zM18.38,31.13L24.76,42.17L31.13,53.21A12.75,12.75 37.68,0 1,18.38 53.21A12.75,12.75 37.68,0 1,12.01 42.17A12.75,12.75 37.68,0 1,18.38 31.13zM32.96,34.21A3.19,3.19 60,0 1,35.8 35.8A3.19,3.19 60,0 1,34.63 40.15A3.19,3.19 60,0 1,30.28 38.99A3.19,3.19 60,0 1,31.45 34.63A3.19,3.19 60,0 1,32.96 34.21z"/>
+</vector>

app/src/main/res/layout/about.xml

@@ -1,56 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="fill_parent"
-    android:layout_height="fill_parent" >
-
-    <ImageView
-        android:id="@+id/logo"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_alignParentLeft="true"
-        android:layout_alignParentStart="true"
-        android:layout_alignParentTop="true"
-        android:layout_marginLeft="@dimen/about_margin"
-        android:layout_marginStart="@dimen/about_margin"
-        android:layout_marginTop="@dimen/about_margin"
-        android:src="@drawable/logo"
-        android:contentDescription="@string/app_logo" />
-
-    <LinearLayout
-        android:layout_width="fill_parent"
-        android:layout_height="fill_parent"
-        android:layout_margin="@dimen/about_margin"
-        android:layout_toRightOf="@+id/logo"
-        android:layout_toEndOf="@+id/logo"
-        android:orientation="vertical" >
-
-        <TextView
-            android:id="@+id/title"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_marginBottom="@dimen/about_spacing"
-            android:text="@string/app_name"
-            android:textAppearance="?android:attr/textAppearanceLarge" />
-        
-        <TextView
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_marginBottom="@dimen/about_spacing"
-            android:text="@string/about_description" />
-        
-        <TextView
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_marginBottom="@dimen/about_spacing"
-            android:text="@string/about_license" />
-        
-        <TextView
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_marginBottom="@dimen/about_spacing"
-            android:text="@string/about_web"
-            android:autoLink="web" />
-        
-    </LinearLayout>
-
-</RelativeLayout>

app/src/main/res/layout/list.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ListView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@android:id/list"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent" />

app/src/main/res/layout/status.xml

@@ -1,5 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<ListView xmlns:android="http://schemas.android.com/apk/res/android"
-    android:id="@android:id/list"
-    android:layout_width="fill_parent"
-    android:layout_height="fill_parent" />

app/src/main/res/menu/main.xml

@@ -1,19 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
-<menu xmlns:android="http://schemas.android.com/apk/res/android">
+<menu
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
 
     <item
         android:id="@+id/status"
         android:title="@string/menu_status"
-        android:showAsAction="always" />
+        app:showAsAction="ifRoom" />
-
-    <item
-        android:id="@+id/shortcuts"
-        android:title="@string/menu_shortcuts"
-        android:showAsAction="never" />
-
-    <item
-        android:id="@+id/about"
-        android:title="@string/menu_about"
-        android:showAsAction="never" />
 
 </menu>

app/src/main/res/menu/status.xml

@@ -1,9 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
-<menu xmlns:android="http://schemas.android.com/apk/res/android">
+<menu
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
 
     <item
         android:id="@+id/clear"
         android:title="@string/menu_clear"
-        android:showAsAction="always" />
+        app:showAsAction="always" />
 
 </menu>

app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/primary"/>
+    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
+</adaptive-icon>

app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/primary"/>
+    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
+</adaptive-icon>

app/src/main/res/mipmap-anydpi-v26/ic_sos.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/light"/>
+    <foreground android:drawable="@mipmap/ic_sos_foreground"/>
+</adaptive-icon>

app/src/main/res/mipmap-anydpi-v26/ic_sos_round.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/light"/>
+    <foreground android:drawable="@mipmap/ic_sos_foreground"/>
+</adaptive-icon>

app/src/main/res/mipmap-anydpi-v26/ic_start.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/light"/>
+    <foreground android:drawable="@mipmap/ic_start_foreground"/>
+</adaptive-icon>

app/src/main/res/mipmap-anydpi-v26/ic_start_round.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/light"/>
+    <foreground android:drawable="@mipmap/ic_start_foreground"/>
+</adaptive-icon>

app/src/main/res/mipmap-anydpi-v26/ic_stop.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/light"/>
+    <foreground android:drawable="@mipmap/ic_stop_foreground"/>
+</adaptive-icon>

app/src/main/res/mipmap-anydpi-v26/ic_stop_round.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/light"/>
+    <foreground android:drawable="@mipmap/ic_stop_foreground"/>
+</adaptive-icon>