Android GoogleAppClient从不连接或失败。无所事事

试图连接到GoogleAppClient，但遇到了这样的情况：不但没有出错，反而什么也没发生

public class Locator
        extends Activity
        implements
        LocationListener, 
        GoogleApiClient.ConnectionCallbacks, 
        GoogleApiClient.OnConnectionFailedListener {

    GoogleApiClient mGoogleApiClient;
    Location        mLastLocation;

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

        // Create an instance of GoogleAPIClient.
        if (mGoogleApiClient == null) {
            mGoogleApiClient = new GoogleApiClient.Builder(this)
                    .addConnectionCallbacks(this)
                    .addOnConnectionFailedListener(this)
                    .addApi(LocationServices.API)
                    .build();
        }
    }
    @Override
    protected void onStart(){
        mGoogleApiClient.connect();
        super.onStart();
        // Note: This does get called
    }
    @Override
    protected void onStop() {
        mGoogleApiClient.disconnect();
        super.onStop();
    }
    @Override
    public void onLocationChanged(Location location) {
        // This never gets called
    }
    @Override
    public void onConnected(@Nullable Bundle bundle) {
        // This never gets called
    }
    @Override
    public void onConnectionSuspended(int i) {
        // This never gets called
    }
    @Override
    public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
        // This never gets called
    }
}

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你在清单中添加权限了吗？是的，我在清单中有这样的内容：“它直接在下面，在外面，好吧，我想这可能是Android Studio的一些奇怪的断点问题。重新启动后我再次尝试，效果良好。你在清单中添加权限了吗？是的，我在清单中有这样的内容：“它直接在下面，在外面，好的，我想这可能是Android Studio的一些奇怪的断点问题。重启后我又试了一次，效果很好。