Anfordern von Standortdiensten Android

Question

Ich verwende diesen Code, damit der Benutzer die Standortdienste aktiviert. Ich möchte den Benutzerdialog anzeigen, der akzeptiert wird, um die Standortdienste zu aktivieren, und sie dann auf die Seite LOCATION_SETTINGS umleiten. Aber ohne dass der Benutzer es vom Benutzer akzeptiert, leitet es die Standorteinstellungen um.

if(lm==null) 
    lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE); 
try{ 
    gps_enabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER); 
}catch(Exception ex){} 
try{ 
    network_enabled = lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER); 
}catch(Exception ex){} 

if(!gps_enabled && !network_enabled){ 
    dialog = new AlertDialog.Builder(this); 
    dialog.setMessage(this.getResources().getString(R.string.gps_network_not_enabled)); 
    dialog.setPositiveButton(this.getResources().getString(R.string.open_location_settings), new DialogInterface.OnClickListener() { 

     @Override 
     public void onClick(DialogInterface paramDialogInterface, int paramInt) { 
      // TODO Auto-generated method stub 
      Intent myIntent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS); 
      startActivity(myIntent); 
      //get gps 
     } 
    }); 
    dialog.setNegativeButton(this.getString(R.string.Cancel), new DialogInterface.OnClickListener() { 

     @Override 
     public void onClick(DialogInterface paramDialogInterface, int paramInt) { 
      // TODO Auto-generated method stub 
      finish(); 
     } 
    }); 
    dialog.show(); 

} 

Answer 1

Soweit ich verstehe, versuchen Sie, den Standort zu aktivieren.

Sie können einen Dialog anzeigen, um den Standort zu aktivieren, anstatt ihn zur LOCATION_SETTING-Seite umzuleiten.

Schritt für Schritt Prozess.

Zunächst müssen Sie einen GoogleApiClient einrichten und GoogleApiClient CallBackMethods implementieren.

protected synchronized void buildGoogleApiClient() { 
     mGoogleApiClient = new Builder(this) 
       .addApi(LocationServices.API) 
       .addConnectionCallbacks(this) 
       .addOnConnectionFailedListener(this) 
       .addApi(LocationServices.API).build(); 
     mGoogleApiClient.connect(); 
} 

Callback-Methoden

@Override 
public void onConnected(Bundle bundle) { 
    Log.d("OnConnected", "Connection successful"); 
    settingsrequest(); 
} 

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

@Override 
public void onConnectionFailed(ConnectionResult connectionResult) { 
    Log.i(TAG, "Connection failed: ConnectionResult.getErrorCode() = " + connectionResult.getErrorCode()); 
} 

Sobald die googleapiclient verbindet, wird onConnected Methode aufrufen und settingsRequest Methode aufrufen wird.

protected static final int REQUEST_CHECK_SETTINGS = 0x1; 
LocationRequest locationRequest; 


public void settingsrequest() { 
    locationRequest = LocationRequest.create(); 
    locationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY); 
    locationRequest.setInterval(30 * 1000); 
    locationRequest.setNumUpdates(1); 
    locationRequest.setExpirationDuration(20000); 
    locationRequest.setFastestInterval(500); 
    LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder().addLocationRequest(locationRequest); 
    builder.setAlwaysShow(true); //this is the key ingredient 
    PendingResult<LocationSettingsResult> result = LocationServices.SettingsApi.checkLocationSettings(mGoogleApiClient, builder.build()); 
    result.setResultCallback(new ResultCallback<LocationSettingsResult>() { 
     @Override 
     public void onResult(LocationSettingsResult result) { 
      final Status status = result.getStatus(); 
      final LocationSettingsStates state = result.getLocationSettingsStates(); 
      switch (status.getStatusCode()) { 
       case LocationSettingsStatusCodes.SUCCESS: { 
        LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, locationRequest, this); 
       } 
       // All location settings are satisfied. The client can initialize location 
       // requests here. 
       break; 
       case LocationSettingsStatusCodes.RESOLUTION_REQUIRED: 
        // Location settings are not satisfied. But could be fixed by showing the user 
        // a dialog. 
        try { 
         // Show the dialog by calling startResolutionForResult(), 
         // and check the result in onActivityResult(). 
         status.startResolutionForResult(MainTab.this, REQUEST_CHECK_SETTINGS); 
        } catch (IntentSender.SendIntentException e) { 
         // Ignore the error. 
        } 
        break; 
       case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE: 
        // Location settings are not satisfied. However, we have no way to fix the 
        // settings so we won't show the dialog. 
        break; 
      } 
     } 
    }); 
} 

status.startResolutionForResult (MainTab.this, REQUEST_CHECK_SETTINGS) wird ein Dialog anfordernden Stelle zeigen.

@Override 
protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
    switch (requestCode) { 
    // Check for the integer request code originally supplied to startResolutionForResult(). 
     case REQUEST_CHECK_SETTINGS: 
      switch (resultCode) { 
       case Activity.RESULT_OK: 
        LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, locationRequest, this); 
        break; 
       case Activity.RESULT_CANCELED: 
        break; 
      } 
      break; 
    } 
} 

LocationServices.FusedLocationApi.requestLocationUpdates (mGoogleApiClient, Location, this) wird ein Listener für den Standort gesetzt cahnged.

Wenn der Speicherort onLocationChanged-Methode geändert wird aufgerufen.

@Override 
public void onLocationChanged(Location location) { 
     prevLocation = location; 
     //Do you work 
} 

hoffen, dass dies Ihnen hilft.