Android GoogleAPIClient，无法在应用启动中首次获取位置

Question

我想开展一项活动，我将对位置变更采取一些措施。因此，有两件事需要注意，如果GPS没有打开，则启动GPS的设置意图。如果未给出位置权限，则会打开“位置请求”对话框。它适用于所有情况，但是当GPS打开并且我第一次打开时，它不起作用。

代码

package in.co.palup.android;

import android.Manifest;
import android.app.ProgressDialog;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationManager;
import android.os.Bundle;
import android.provider.Settings;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.NavigationView;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Toast;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;

import java.io.IOException;

/**
 * Home activity
 */
public class MainActivity extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener,
        GoogleApiClient.ConnectionCallbacks,
        GoogleApiClient.OnConnectionFailedListener,
        LocationListener {

    private static final int PERMISSION_REQUEST_CODE_LOCATION = 1;

    /**
     * Http connection timeout
     */
    private final int TIME_OUT = 60 * 1000;

    /**
     * Tag for logger.
     */
    private final String TAG = "Home";

    /**
     * Dialog to show when loading is going in background
     */
    private ProgressDialog progressDialog;

    /**
     * Google API client.
     */
    private GoogleApiClient googleApiClient;

    /**
     * Location request.
     */
    private LocationRequest locationRequest;

    /**
     * The location manager
     */
    private LocationManager locationManager;

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

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Log.d(TAG, "Create new event");
                Intent intent = new Intent(getApplicationContext(), EventCreation.class);
                startActivity(intent);
            }
        });

        if (googleApiClient == null) {
            googleApiClient = new GoogleApiClient.Builder(this)
                    .addConnectionCallbacks(this)
                    .addOnConnectionFailedListener(this)
                    .addApi(LocationServices.API)
                    .build();
        }

        locationManager =
                (android.location.LocationManager) this.getSystemService(LOCATION_SERVICE);
        if (!locationManager.isProviderEnabled(android.location.LocationManager.GPS_PROVIDER)) {
            Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
            this.startActivity(intent);
        }

        if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) !=
                PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(this,
                    new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
                    PERMISSION_REQUEST_CODE_LOCATION);
        }

    }

    protected void createLocationRequest() {
        locationRequest = new LocationRequest();
        locationRequest.setInterval(10000);
        locationRequest.setFastestInterval(5000);
        locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
    }

    protected void startLocationUpdates() {
        if (googleApiClient == null) {
            Log.i(TAG, "client is null");
        }
        if (locationRequest == null) {
            Log.i(TAG, "location request is null");
        }
        LocationServices.FusedLocationApi.requestLocationUpdates(
                googleApiClient, locationRequest, this);
    }

    @Override
    public void onBackPressed() {
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        if (drawer.isDrawerOpen(GravityCompat.START)) {
            drawer.closeDrawer(GravityCompat.START);
        } else {
            super.onBackPressed();
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.palup_home, menu);
        return true;
    }

    @Override
    protected void onStart() {
        googleApiClient.connect();
        super.onStart();
    }

    @Override
    protected void onStop() {
        googleApiClient.disconnect();
        super.onStop();
    }

    @Override
    public void onConnected(Bundle bundle) {

        if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) ==
                PackageManager.PERMISSION_GRANTED && locationManager.isProviderEnabled(android.location.LocationManager.GPS_PROVIDER)) {
            createLocationRequest();
            startLocationUpdates();
        }
    }

    @Override
    public void onConnectionSuspended(int i) {

    }

    @Override
    public void onConnectionFailed(ConnectionResult connectionResult) {

    }

    @Override
    public void onLocationChanged(Location location) {
        Log.i("onLocationChanged", location.toString());

        // TODO: take action on location
    }
}