在服務類中獲得連續的緯度和長度？

你好，我做了一個服務類，我想獲取連續位置（經度和緯度）。正是我想要做的是：我有活動說A和B在服務類中獲得連續的緯度和長度？

1.I打電話給我的服務類從胡亞蓉一個

Intent mIntent=new Intent(A.this, OverlayService.class); startService(mIntent);

2.In服務，我想連續緯度和經度並以本地dB存儲。這是我的服務。

public class OverlayService extends Service implements LocationListener { 


    Location location; // location 
    double previousLat,previousLong; 
    private static LocationManager _locationManager; 
    private WindowManager windowManager; 
    private ImageView chatHead; 
    private String allocationId, vehicleNumber; 
    double latitude; // latitude 
    double longitude; // longitude 
    private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 5; // 5 meters 

    // The minimum time between updates in milliseconds 
    private static final long MIN_TIME_BW_UPDATES = 1000 * 30; // 1 minute 

    public synchronized static LocationManager getInstance(Context context) 
    { 
     if (_locationManager == null) 
     { 
      _locationManager = (LocationManager) context 
        .getSystemService(LOCATION_SERVICE); 
     } 
     return _locationManager; 
    } 

    @Override 
    public IBinder onBind(Intent intent) { 
     // Not used 
     return null; 
    } 

    @Override 
    public int onStartCommand(Intent intent, int flags, int startId) { 
     Log.d("OverlayService", "Service Started"); 
     _locationManager=getInstance(this); 
     return super.onStartCommand(intent, flags, startId); 
    } 

    @Override 
    public void onCreate() { 
     super.onCreate(); 
     windowManager = (WindowManager) getSystemService(WINDOW_SERVICE); 

     chatHead = new ImageView(this); 
     chatHead.setImageResource(R.drawable.backgroundimage); 

     final WindowManager.LayoutParams params = new WindowManager.LayoutParams(200, 400, WindowManager.LayoutParams.TYPE_PHONE, WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE, PixelFormat.TRANSLUCENT); 


     params.gravity = Gravity.TOP | Gravity.LEFT; 
     params.x = 0; 
     params.y = 100; 

     //Drag events can be handled here 
     chatHead.setOnTouchListener(new View.OnTouchListener() { 
      private int initialX; 
      private int initialY; 
      private float initialTouchX; 
      private float initialTouchY; 

      @Override 
      public boolean onTouch(View v, MotionEvent event) { 
       switch (event.getAction()) { 
        case MotionEvent.ACTION_DOWN: 
         initialX = params.x; 
         initialY = params.y; 
         initialTouchX = event.getRawX(); 
         initialTouchY = event.getRawY(); 
         return true; 
        case MotionEvent.ACTION_UP: 
         Intent intent = new Intent(OverlayService.this, A.class); 
         intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
         startActivity(intent); 
         return true; 
        case MotionEvent.ACTION_MOVE: 
         params.x = initialX 
           + (int) (event.getRawX() - initialTouchX); 
         params.y = initialY 
           + (int) (event.getRawY() - initialTouchY); 
         windowManager.updateViewLayout(chatHead, params); 
         return true; 
       } 
       return false; 
      } 
     }); 
     windowManager.addView(chatHead, params); 
this.getSystemService(Context.LOCATION_SERVICE); 

     _locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,MIN_TIME_BW_UPDATES,MIN_DISTANCE_CHANGE_FOR_UPDATES,this); 
} 
    @Override 
    public void onDestroy() { 
     super.onDestroy(); 
     Log.d("OverlayService","Inside on Destroy"); 
     if (chatHead != null) 
windowManager.removeView(chatHead); 
    } 

    @Override 
    public void onLocationChanged(Location location) { 
     latitude=location.getLatitude(); 
     longitude=location.getLongitude(); 
     Toast.makeText(getApplicationContext(), "Long: " + location.getLongitude() + ", Lat: " + location.getLatitude(), Toast.LENGTH_SHORT).show(); 
     double currentLat=latitude,currentLong=longitude; 
     if(currentLat!=0&&currentLong!=0) { 
      if(previousLat!=currentLat&&previousLong!=currentLong) { 
       storeInDataBase(null, vehicleNumber, currentLat, currentLong, allocationId); 
      }else{ 
       Toast.makeText(this,"Not Saving",Toast.LENGTH_SHORT).show();; 
      } 
      previousLat=currentLat; 
      previousLong=currentLong; 
     } 

    } 

    @Override 
    public void onStatusChanged(String provider, int status, Bundle extras) { 

    } 

    @Override 
    public void onProviderEnabled(String provider) { 

    } 

    @Override 
    public void onProviderDisabled(String provider) { 

    } 

    private void storeInDataBase(DeviceInfo deviceInfo, String vehicleNum, double currentLat, double currentLong, String allocationId) { 
     final String KEY = "carLatLong" + allocationId; 
     Constants constants=new Constants(); 
     if (constants.getLatLong(this, KEY) != null&&constants.getLatLong(this, KEY).trim().length()>0) { 
      String data = constants.getLatLong(this, "carLatLong" + allocationId) + ":" + currentLat + "," + currentLong; 
      Log.d("Constants", "Data Stored:::::::" + data); 
      constants.storeLatLong(this, KEY, data); 
     } else { 
      String data = currentLat + "," + currentLong; 
      Log.d("Constants", "Data Stored in else:::::::" + data); 
      constants.storeLatLong(this, KEY, data); 
     } 
    } 


}

我在onLocationChanged中獲得Lat long，但是這讓我有點遲了。有什麼我需要改變？或建議？我想要經久不衰。

來源

2017-03-05 Rahul Verma

使用LocationManager.GPS_PROVIDER代替

_locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,MIN_TIME_BW_UPDATES,MIN_DISTANCE_CHANGE_FOR_UPDATES,this);

檢查this

來源

2017-03-05 06:09:55

在服務類中獲得連續的緯度和長度？

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