Implement database for buffer

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

@@ -0,0 +1,105 @@
+/*
+ * 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.ContentValues;
+import android.content.Context;
+import android.database.Cursor;
+import android.database.SQLException;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+
+import java.util.Date;
+
+public class DatabaseHelper extends SQLiteOpenHelper {
+
+    public static final int DATABASE_VERSION = 1;
+    public static final String DATABASE_NAME = "traccar.db";
+
+    public DatabaseHelper(Context context) {
+        super(context, DATABASE_NAME, null, DATABASE_VERSION);
+    }
+
+    @Override
+    public void onCreate(SQLiteDatabase db) {
+        db.execSQL("CREATE TABLE position (" +
+                "id INTEGER PRIMARY KEY AUTOINCREMENT," +
+                "deviceId TEXT," +
+                "time INTEGER," +
+                "latitude REAL," +
+                "longitude REAL," +
+                "altitude REAL," +
+                "speed REAL," +
+                "course REAL," +
+                "battery REAL)");
+    }
+
+    @Override
+    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+        db.execSQL("DROP TABLE IF EXISTS position;");
+        onCreate(db);
+    }
+
+    public void insertPosition(SQLiteDatabase db, Position position) {
+        ContentValues values = new ContentValues();
+        values.put("deviceId", position.getDeviceId());
+        values.put("time", position.getTime().getTime());
+        values.put("latitude", position.getLatitude());
+        values.put("longitude", position.getLongitude());
+        values.put("altitude", position.getAltitude());
+        values.put("speed", position.getSpeed());
+        values.put("course", position.getCourse());
+        values.put("battery", position.getBattery());
+
+        db.insertOrThrow("position", null, values);
+    }
+
+    public Position selectPosition(SQLiteDatabase db) {
+        Position position = new Position();
+
+        Cursor cursor = db.rawQuery("SELECT * FROM position ORDER BY id LIMIT 1", null);
+        try {
+            if (cursor.getCount() > 0) {
+
+                cursor.moveToFirst();
+
+                position.setId(cursor.getLong(cursor.getColumnIndex("id")));
+                position.setDeviceId(cursor.getString(cursor.getColumnIndex("deviceId")));
+                position.setTime(new Date(cursor.getLong(cursor.getColumnIndex("time"))));
+                position.setLatitude(cursor.getDouble(cursor.getColumnIndex("latitude")));
+                position.setLongitude(cursor.getDouble(cursor.getColumnIndex("longitude")));
+                position.setAltitude(cursor.getDouble(cursor.getColumnIndex("altitude")));
+                position.setSpeed(cursor.getDouble(cursor.getColumnIndex("speed")));
+                position.setCourse(cursor.getDouble(cursor.getColumnIndex("course")));
+                position.setBattery(cursor.getDouble(cursor.getColumnIndex("battery")));
+
+            } else {
+                return null;
+            }
+        } finally {
+            cursor.close();
+        }
+
+        return position;
+    }
+
+    public void deletePosition(SQLiteDatabase db, long id) {
+        if (db.delete("position", "id = ?", new String[] { String.valueOf(id) }) != 1) {
+            throw new SQLException();
+        }
+    }
+
+}

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

@@ -21,11 +21,10 @@ import java.util.Date;
 
 public class Position {
 
-    public Location location; // DELME
+    public Position() {
+    }
 
     public Position(String deviceId, Location location, double battery) {
-        this.location = location; // DELME
-
         this.deviceId = deviceId;
         time = new Date(location.getTime());
         latitude = location.getLatitude();
@@ -36,6 +35,10 @@ public class Position {
         this.battery = battery;
     }
 
+    private long 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; }