如何以编程方式打开GPS

Question

我正在创建一个使用谷歌地图的Android应用程序，所以我需要打开GPS，我有一个飞溅活动，即时通讯尝试检查GPS是否打开。问题是我可以检查GPS是否打开，但我不知道如何创建对话框，以便用户打开GPS。我在几个应用程序中看到，当您打开它时，会显示一个对话框，如果GPS应该打开，用户会看到该对话框，如果用户选择是，则GPS会自动打开。如果用户选择否，对话框关闭并再次打开。这个过程重复直到用户选择是。我怎样才能实现这样的事情？

以下是我有这么远：

public class ActividadSplash extends AppCompatActivity { 

    private static final long SPLASH_SCREEN_DELAY = 6000; 
    private ProgressBar barra; 
    private int progressStatus = 0; 
    private Handler handler = new Handler(); 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.splash_screen); 

     final LocationManager manager = (LocationManager)getApplicationContext().getSystemService (Context.LOCATION_SERVICE); 

     if(!manager.isProviderEnabled(LocationManager.GPS_PROVIDER)){ 
      CheckEnableGPS(); 
     } 
     else{ 
      barra = (ProgressBar) findViewById(R.id.barraProgreso2); 
      barra.setScaleY(3f); 

      new Thread(new Runnable() { 
       public void run() { 
        while (progressStatus < 100) { 
         progressStatus += 1; 
         //Update progress bar with completion of operation 
         handler.post(new Runnable() { 
          public void run() { 
           barra.setProgress(progressStatus); 
           if(progressStatus==100){ 
            finish(); 

            ParseUser usuario= ParseUser.getCurrentUser(); 
            if(usuario!=null){ 

             Intent intento = new Intent(getApplicationContext(), DrawerPrincipal.class); 
             intento.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
             intento.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK); 
             startActivity(intento); 

            }else{ 

             Intent intento = new Intent(getApplicationContext(), ActividadLogin.class); 
             intento.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
             intento.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK); 
             startActivity(intento); 
            } 
           } 
           // textView.setText(progressStatus+"/"+progressBar.getMax()); 
          } 
         }); 
         try { 
          // Sleep for 200 milliseconds. 
          //Just to display the progress slowly 
          Thread.sleep(20); 
         } catch (InterruptedException e) { 
          e.printStackTrace(); 
         } 
        } 
       } 
      }).start(); 
     }  
    } 

    private void CheckEnableGPS() { 
     String provider = Settings.Secure.getString(getContentResolver(), 
       Settings.Secure.LOCATION_PROVIDERS_ALLOWED); 
     if(!provider.equals("")){ 
      //GPS Enabled 
     }else{ 
      AlertDialog.Builder builder = new AlertDialog.Builder(this); 
      builder.setTitle("Enable GPS"); // GPS not found 
      builder.setMessage("The app needs GPS to be enabled do you want to enable it in the settings? "); // Want to enable? 
      builder.setPositiveButton("Settings", new DialogInterface.OnClickListener() { 
       public void onClick(DialogInterface dialogInterface, int i) { 
        startActivity(new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS)); 
       } 
      }); 
      builder.setNegativeButton("Exit", new DialogInterface.OnClickListener() { 
       public void onClick(DialogInterface dialogInterface, int i) { 
        finish(); 
       } 
      }); 
      builder.setCancelable(false); 
      builder.create().show(); 
      return; 
     } 
    } 
} 

Answer 1

private void showGpsDialogAndGetLocation() { 
     mGoogleApiClient = new GoogleApiClient.Builder(LoginActivity.this) 
       .addConnectionCallbacks(this) 
       .addOnConnectionFailedListener(this) 
       .addApi(LocationServices.API) 
       .build(); 
     mGoogleApiClient.connect(); 

     //initialize the builder and add location request paramenter like HIGH Aurracy 
     locationRequest = LocationRequest.create() 
       .setInterval(10 * 60 * 1000) // every 10 minutes 
       .setExpirationDuration(10 * 1000) // After 10 seconds 
       .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY); 
     builder = new LocationSettingsRequest.Builder() 
       .addLocationRequest(locationRequest); 

     // set builder to always true (Shows the dialog after never operation too) 
     builder.setAlwaysShow(true); 

     // Then check whether current location settings are satisfied: 
     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 locationSettingsStates = result.getLocationSettingsStates(); 
       switch (status.getStatusCode()) { 
        case LocationSettingsStatusCodes.SUCCESS: 
         // All location settings are satisfied. The client can initialize location 
         // requests here. 
         getLocationAndSaveInDatabase(); 
         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(
            LoginActivity.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; 
       } 
      } 
     }); 
    } 


    @Override 
    public void onLocationChanged(Location location) { 
     if (location != null) { 
      double latitude = location.getLatitude(); 
      double longitude = location.getLongitude(); 
      insertLocationCoordinatesInDatabase(latitude, longitude); 

     } 
    } 

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

    } 

    @Override 
    public void onProviderEnabled(String provider) { 

    } 

    @Override 
    public void onProviderDisabled(String provider) { 

    } 



    @Override 
    public void onConnected(@Nullable Bundle bundle) { 

    } 

    @Override 
    public void onConnectionSuspended(int i) { 

    } 

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

    } 



**Implement These Interfaces in class** 

implements LocationListener, GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener