启用位置对话框无法正确打开

Question

应用启动后，我尝试打开启用位置对话框。仅打开对话框，但启用位置选项未显示在对话框中，仅显示空白白色对话框。我在此帖子上附加了屏幕截图，你们可以帮我吗？

代码

package abc.xyz;


import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.location.LocationManager;
import android.os.Bundle;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;


public class MainActivity extends AppCompatActivity {
    Context context;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        context = this;
        LocationManager manager = (LocationManager) getSystemService(Context.LOCATION_SERVICE );
        boolean statusOfGPS = manager.isProviderEnabled(LocationManager.GPS_PROVIDER);

        if(!statusOfGPS)
        {
            buildAlertMessageNoGps();
        }
   }

    private void buildAlertMessageNoGps() {
        final AlertDialog.Builder builder = new AlertDialog.Builder(context);
        builder.setMessage(R.string.gps_disabled)
                .setCancelable(false)
                .setTitle(R.string.gps_disabled_title)
                .setPositiveButton(R.string.enable,
                new DialogInterface.OnClickListener() {
                public void onClick(
                @SuppressWarnings("unused") final DialogInterface dialog,
                @SuppressWarnings("unused") final int id) {
            startActivity(new Intent(
        android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS));
        }
    })
                .setNegativeButton(R.string.cancel,
    new DialogInterface.OnClickListener() {
        public void onClick(final DialogInterface dialog,
        @SuppressWarnings("unused") final int id) {
            dialog.cancel();

        }
    });
        final AlertDialog alert = builder.create();
        alert.show();
    }


}

Answer 1

尝试此代码

  private void buildAlertMessageNoGps(Context context)
    {
    GoogleApiClient googleApiClient = new GoogleApiClient.Builder(context)
            .addApi(LocationServices.API).build();
    googleApiClient.connect();

    LocationRequest locationRequest = LocationRequest.create();
    locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
    locationRequest.setInterval(10000);
    locationRequest.setFastestInterval(10000 / 2);

    LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder().addLocationRequest(locationRequest);
    builder.setAlwaysShow(true);

    PendingResult<LocationSettingsResult> result = LocationServices.SettingsApi.checkLocationSettings(googleApiClient, builder.build());
    result.setResultCallback(new ResultCallback<LocationSettingsResult>() {
        @Override
        public void onResult(LocationSettingsResult result) {
            final Status status = result.getStatus();
            switch (status.getStatusCode()) {
                case LocationSettingsStatusCodes.SUCCESS:
                    Log.i(TAG, "All location settings are satisfied.");
                    break;
                case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:
                    Log.i(TAG, "Location settings are not satisfied. Show the user a dialog to upgrade location settings ");

                    try {
                        // Show the dialog by calling startResolutionForResult(), and check the result
                        // in onActivityResult().
                        status.startResolutionForResult(LoginScreen.this, REQUEST_CHECK_SETTINGS);
                    } catch (IntentSender.SendIntentException e) {
                        Log.i(TAG, "PendingIntent unable to execute request.");
                    }
                    break;
                case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
                    Log.i(TAG, "Location settings are inadequate, and cannot be fixed here. Dialog not created.");
                    break;
            }
        }
    });
}