хотите хранить данные в локальном db, когда устройство находится в автономном режиме и получить от db, когда он-лайн, и отправить на сервер

Question

1. У меня есть служба оповещения о тревоге через каждые 15 минут и отправлять данные на сервер каждые 15 минут. но когда wifi недоступен, я не могу отправить данные на сервер. Я хочу хранить данные в локальной базе данных через 15 минут и отправлять на сервер, когда устройство находится в сети.

2. мое приложение перестает работать, когда отключается gps, я хочу оповещение, когда gps отключен.

здесь код сервиса

public class LocationService extends Service implements LocationListener { 

public static String LOG = "Log"; 
JSONParser jsonParser = new JSONParser(); 
private final Context mContext; 
boolean isGPSEnabled = false; 
boolean isNetworkEnabled = false; 
boolean canGetLocation = false; 

Location location; // location 
double latitude; // latitude 
double longitude; // longitude 
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 0; // 0 meters 
private static final long MIN_TIME_BW_UPDATES = 1000; // 1 second 
protected LocationManager locationManager; 
private SQLiteHandler db; 

public LocationService(Context context) { 
    this.mContext = context; 
} 

public LocationService() { 
    super(); 
    mContext = LocationService.this; 
} 

@Override 
public IBinder onBind(Intent intent) { 
    return null; 
} 

@Override 
public int onStartCommand(Intent intent, int flags, int startId) { 
    db = new SQLiteHandler(getApplicationContext()); 
    HashMap<String, String> user = db.getUserDetails(); 
    String uid = user.get("uid"); 
    SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this); 
    String IMEINo =sharedPreferences.getString("IMEI NO",null); 

    SimpleDateFormat simpleDateFormat = 
      new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZZZZZ"); 
    Calendar calendar = Calendar.getInstance(); 
    Date now = calendar.getTime(); 
    String deviceTimeStamp = simpleDateFormat.format(now); 
    Toast.makeText(this,("latitude" + latitude +"longitude" + longitude +uid), Toast.LENGTH_LONG).show(); 
    Log.i(LOG, "Service started"); 
    Log.i("asd", "This is sparta"); 
    new MyAsyncTask().execute((Double.toString(Double.parseDouble(uid))), 
      (Double.toString(getLocation().getLongitude())), 
      (Double.toString(getLocation().getLatitude())), 
      (Double.toString(Double.parseDouble(IMEINo))), 
      (deviceTimeStamp)); 

    return START_STICKY; 
} 
@Override 
public void onCreate() { 
    super.onCreate(); 
    Log.i(LOG, "Service created"); 
} 

@Override 
public void onDestroy() { 
    super.onDestroy(); 
    Log.i(LOG, "Service destroyed"); 
} 

private class MyAsyncTask extends AsyncTask<String, String, String>{ 

    @Override 
    protected String doInBackground(String... params) { 
     // TODO Auto-generated method stub 
     postData(params[0],params[1],params[2],params[3],params[4]); 

     return "call"; 
    } 

    protected void onPostExecute(String result){ 

     Toast.makeText(getApplicationContext(), "command sent", Toast.LENGTH_LONG).show(); 
    } 
    public void postData(String uid, String longitude, String latitude, String IMEI, String deviceTimeStamp) { 
     // Create a new HttpClient and Post Header 
     HttpClient httpclient = new DefaultHttpClient(); 
     HttpPost httppost = new HttpPost("http://enftracker.com/app_script/connect1.php"); 

     try { 
      // Add your data 
      List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(); 
      nameValuePairs.add(new BasicNameValuePair("uid", uid)); 
      nameValuePairs.add(new BasicNameValuePair("longitude", longitude)); 
      nameValuePairs.add(new BasicNameValuePair("latitude", latitude)); 
      nameValuePairs.add(new BasicNameValuePair("IMEI", IMEI)); 
      nameValuePairs.add(new BasicNameValuePair("deviceTimeStamp", deviceTimeStamp)); 
      httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); 


      // Execute HTTP Post Request 
      HttpResponse response = httpclient.execute(httppost); 

     } catch (ClientProtocolException e) { 
      // TODO Auto-generated catch block 
     } catch (IOException e) { 
      // TODO Auto-generated catch block 
     } 
    } 

} 
public Location getLocation() { 
    try { 
     locationManager = (LocationManager) mContext 
       .getSystemService(LOCATION_SERVICE); 

     // getting GPS status 
     isGPSEnabled = locationManager 
       .isProviderEnabled(LocationManager.GPS_PROVIDER); 

     // getting network status 
     isNetworkEnabled = locationManager 
       .isProviderEnabled(LocationManager.NETWORK_PROVIDER); 

     if (!isGPSEnabled && !isNetworkEnabled) { 
      // no network provider is enabled 
     } else { 
      this.canGetLocation = true; 
      if (isNetworkEnabled) { 
       //updates will be send according to these arguments 
       locationManager.requestLocationUpdates(
         LocationManager.NETWORK_PROVIDER, 
         MIN_TIME_BW_UPDATES, 
         MIN_DISTANCE_CHANGE_FOR_UPDATES, this); 
       Log.d("Network", "Network"); 
       if (locationManager != null) { 
        location = locationManager 
          .getLastKnownLocation(LocationManager.NETWORK_PROVIDER); 
        if (location != null) { 
         latitude = location.getLatitude(); 
         longitude = location.getLongitude(); 
        } 
       } 
      } 
      // if GPS Enabled get lat/long using GPS Services 
      if (isGPSEnabled) { 
       if (location == null) { 
        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { 
         // TODO: Consider calling 
         // ActivityCompat#requestPermissions 
         // here to request the missing permissions, and then overriding 
         // public void onRequestPermissionsResult(int requestCode, String[] permissions, 
         //           int[] grantResults) 
         // to handle the case where the user grants the permission. See the documentation 
         // for ActivityCompat#requestPermissions for more details. 
         return null; 
        } 
        locationManager.requestLocationUpdates(
          LocationManager.GPS_PROVIDER, 
          MIN_TIME_BW_UPDATES, 
          MIN_DISTANCE_CHANGE_FOR_UPDATES, this); 
        Log.d("GPS Enabled", "GPS Enabled"); 
        if (locationManager != null) { 
         location = locationManager 
           .getLastKnownLocation(LocationManager.GPS_PROVIDER); 
         if (location != null) { 
          latitude = location.getLatitude(); 
          longitude = location.getLongitude(); 

         } 
        } 
       } 
      } 
     } 

    } catch (Exception e) { 
     e.printStackTrace(); 
    } 
    return location; 
} 
@Override 
public void onLocationChanged(Location location) { 
} 
@Override 
public void onStatusChanged(String provider, int status, Bundle extras) { 
} 
@Override 
public void onProviderEnabled(String provider) { 
} 
@Override 
public void onProviderDisabled(String provider) { 
} 
} 

Answer 1

Вы можете использовать этот метод

@Override 
public void onProviderEnabled(String provider) { 
    if (provider.equals(LocationManager.GPS_PROVIDER) { 
     boolean isEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER); 

    } 
} 

happyCoding;