Implement rating flow

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

@@ -15,16 +15,55 @@
  */
 package org.traccar.client;
 
+import android.app.Activity;
+import android.content.IntentFilter;
+import android.content.SharedPreferences;
+import android.os.Build;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.RequiresApi;
+import androidx.preference.PreferenceManager;
+
+import com.google.android.play.core.review.ReviewManager;
+import com.google.android.play.core.review.ReviewManagerFactory;
+import com.google.android.play.core.tasks.Task;
 import com.google.firebase.analytics.FirebaseAnalytics;
 
 public class GoogleMainApplication extends MainApplication {
 
+    private static final String KEY_RATING_SHOWN = "ratingShown";
+    private static final long RATING_THRESHOLD = -24 * 60 * 60 * 1000L;
+
     private FirebaseAnalytics firebaseAnalytics;
 
     @Override
     public void onCreate() {
         super.onCreate();
         firebaseAnalytics = FirebaseAnalytics.getInstance(this);
+
+        IntentFilter filter = new IntentFilter();
+        filter.addAction(TrackingService.ACTION_STARTED);
+        filter.addAction(TrackingService.ACTION_STOPPED);
+        registerReceiver(new ServiceReceiver(), filter);
+    }
+
+    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP_MR1)
+    @Override
+    public void handleRatingFlow(@NonNull Activity activity) {
+        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
+        boolean ratingShown = preferences.getBoolean(KEY_RATING_SHOWN, false);
+        long totalDuration = preferences.getLong(ServiceReceiver.KEY_DURATION, 0);
+        if (!ratingShown && totalDuration > RATING_THRESHOLD) {
+            ReviewManager reviewManager = ReviewManagerFactory.create(activity);
+            reviewManager.requestReviewFlow().addOnCompleteListener(infoTask -> {
+                if (infoTask.isSuccessful()) {
+                    Task<Void> flow = reviewManager.launchReviewFlow(activity, infoTask.getResult());
+                    flow.addOnCompleteListener(flowTask -> {
+                        preferences.edit().putBoolean(KEY_RATING_SHOWN, true).apply();
+                    });
+                }
+            });
+        }
     }
 
 }

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

@@ -0,0 +1,49 @@
+/*
+ * Copyright 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.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.SharedPreferences;
+
+import androidx.preference.PreferenceManager;
+
+public class ServiceReceiver extends BroadcastReceiver {
+
+    public static final String KEY_DURATION = "serviceTime";
+
+    private static long startTime = 0;
+    
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        if (TrackingService.ACTION_STARTED.equals(intent.getAction())) {
+            startTime = System.currentTimeMillis();
+        } else {
+            if (startTime > 0) {
+                updateTime(context, System.currentTimeMillis() - startTime);
+                startTime = 0;
+            }
+        }
+    }
+
+    private void updateTime(Context context, long duration) {
+        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
+        long totalDuration = preferences.getLong(KEY_DURATION, 0);
+        preferences.edit().putLong(KEY_DURATION, totalDuration + duration).apply();
+    }
+
+}