定期的にGPS座標を送信する

Question

私はWindowsアプリケーションプログラマーで、最近はアンドロイドを学び始めました。私は、 "開始"ボタンをクリックした後30秒ごとにGPS座標を定期的に送信するアプリケーションを作成し、 "停止"ボタンをクリックすることで停止する（私は既にデータを受け入れるWebサービスを開発した）。私はタイマーを使用し、すべての "目盛り"にGPS座標を見つけて送信します。アンドロイドでも同様のことがどうやってできるのか理解してください。

Answer 1

私のアプリとその動作にどのように使用しているかを確認してください。融合apiを使用しています。

ステップ1. GoogleLocationService.java

public class GoogleLocationService { 
private GoogleServicesCallbacks callbacks = new GoogleServicesCallbacks(); 
LocationUpdateListener locationUpdateListener; 
Context activity; 
protected GoogleApiClient mGoogleApiClient; 
protected LocationRequest mLocationRequest; 

public static final long UPDATE_INTERVAL_IN_MILLISECONDS = 30000; 


public GoogleLocationService(Context activity, LocationUpdateListener locationUpdateListener) { 
    this.locationUpdateListener = locationUpdateListener; 
    this.activity = activity; 
    buildGoogleApiClient(); 
} 

protected synchronized void buildGoogleApiClient() { 
    //Log.i(TAG, "Building GoogleApiClient"); 
    mGoogleApiClient = new GoogleApiClient.Builder(activity) 
      .addConnectionCallbacks(callbacks) 
      .addOnConnectionFailedListener(callbacks) 
      .addApi(LocationServices.API) 
      .build(); 
    createLocationRequest(); 
    mGoogleApiClient.connect(); 
} 

protected void createLocationRequest() { 
    mLocationRequest = new LocationRequest(); 
    mLocationRequest.setInterval(UPDATE_INTERVAL_IN_MILLISECONDS); 
    mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY); 

} 

private class GoogleServicesCallbacks implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener { 

    @Override 
    public void onConnected(Bundle bundle) { 
     startLocationUpdates(); 
    } 

    @Override 
    public void onConnectionSuspended(int i) { 
     mGoogleApiClient.connect(); 
    } 

    @Override 
    public void onConnectionFailed(@NonNull ConnectionResult connectionResult) { 

     if (connectionResult.getErrorCode() == ConnectionResult.SERVICE_VERSION_UPDATE_REQUIRED) { 
      Toast.makeText(activity, "Google play service not updated", Toast.LENGTH_LONG).show(); 

     } 
     locationUpdateListener.cannotReceiveLocationUpdates(); 
    } 

    @Override 
    public void onLocationChanged(Location location) { 
     if (location.hasAccuracy()) { 
      if (location.getAccuracy() < 30) { 
       locationUpdateListener.updateLocation(location); 
      } 
     } 
    } 
} 

private static boolean locationEnabled(Context context) { 
    boolean gps_enabled = false; 
    LocationManager lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE); 
    try { 
     gps_enabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER); 
    } catch (Exception ex) { 
     ex.printStackTrace(); 
    } 
    return gps_enabled; 
} 

private boolean servicesConnected(Context context) { 
    return isPackageInstalled(GooglePlayServicesUtil.GOOGLE_PLAY_STORE_PACKAGE, context); 
} 

private boolean isPackageInstalled(String packagename, Context context) { 
    PackageManager pm = context.getPackageManager(); 
    try { 
     pm.getPackageInfo(packagename, PackageManager.GET_ACTIVITIES); 
     return true; 
    } catch (PackageManager.NameNotFoundException e) { 
     e.printStackTrace(); 
     return false; 
    } 
} 


public void startUpdates() { 
    /* 
    * Connect the client. Don't re-start any requests here; instead, wait 
    * for onResume() 
    */ 
    if (servicesConnected(activity)) { 
     if (locationEnabled(activity)) { 
      locationUpdateListener.canReceiveLocationUpdates(); 
      startLocationUpdates(); 
     } else { 
      locationUpdateListener.cannotReceiveLocationUpdates(); 
      Toast.makeText(activity, "Unable to get your location.Please turn on your device Gps", Toast.LENGTH_LONG).show(); 
     } 
    } else { 
     locationUpdateListener.cannotReceiveLocationUpdates(); 
     Toast.makeText(activity, "Google play service not available", Toast.LENGTH_LONG).show(); 
    } 
} 

//stop location updates 
public void stopUpdates() { 
    stopLocationUpdates(); 
} 

//start location updates 
private void startLocationUpdates() { 

    if (checkSelfPermission(activity, ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && checkSelfPermission(activity, ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { 
     return; 
    } 
    if (mGoogleApiClient.isConnected()) { 
     LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, callbacks); 
    } 
} 

public void stopLocationUpdates() { 
    if (mGoogleApiClient.isConnected()) { 
     LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, callbacks); 
    } 
} 

public void startGoogleApi() { 
    mGoogleApiClient.connect(); 
} 

public void closeGoogleApi() { 
    mGoogleApiClient.disconnect(); 
} 

} 

ステップ2をこのクラス してください。このインタフェース LocationUpdateListener.java

public interface LocationUpdateListener { 

/** 
* Called immediately the service starts if the service can obtain location 
*/ 
void canReceiveLocationUpdates(); 

/** 
* Called immediately the service tries to start if it cannot obtain location - eg the user has disabled wireless and 
*/ 
void cannotReceiveLocationUpdates(); 

/** 
* Called whenever the location has changed (at least non-trivially) 
* @param location 
*/ 
void updateLocation(Location location); 

/** 
* Called when GoogleLocationServices detects that the device has moved to a new location. 
* @param localityName The name of the locality (somewhere below street but above area). 
*/ 
void updateLocationName(String localityName, Location location); 
} 

ステップあなたのOnCreate

プライベートGoogleLocationService googleLocationService 3.コールにこれを行います。

googleLocationService = new GoogleLocationService(context, new LocationUpdateListener() { 
    @Override 
    public void canReceiveLocationUpdates() { 
    } 

    @Override 
    public void cannotReceiveLocationUpdates() { 
    } 

    //update location to our servers for tracking purpose 
    @Override 
    public void updateLocation(Location location) { 
     if (location != null) { 
      Timber.e("updated location %1$s %2$s", location.getLatitude(), location.getLongitude()); 

     } 
    } 

    @Override 
    public void updateLocationName(String localityName, Location location) { 

     googleLocationService.stopLocationUpdates(); 
    } 
}); 
googleLocationService.startUpdates(); 


and call this onDestroy 
if (googleLocationService != null) { 
    googleLocationService.stopLocationUpdates(); 
} 

希望すると、問題を解決するのに役立ちます。

Answer 2

RxGpsService（RxJavaを使用してGPSのロケーションとルートの統計情報を取得するAndroidサービス）をご覧ください。現在の速度、距離、経過時間およびウェイポイントを含むRouteStatsオブジェクトを取得します。また、クロノが停止しているときに、クロノを再生/停止して位置を破棄することもできます。