java - Android:onConnected、onConnectionSupspended 或 onConnectionFailed 都没有被调用

Question

我正在制作一个天气应用程序，除了获取用户的位置外，一切正常。我正在尝试使用播放服务 API 并调用 getLongitude() 和 getLatitude() 来做到这一点。但是，我正在编写的代码都没有工作，因为我在标题中列出的代码都没有运行。这是与获取位置有关的代码:

public class MainActivity extends ActionBarActivity implements GoogleApiClient.OnConnectionFailedListener, GoogleApiClient.ConnectionCallbacks {
public static final String TAG = MainActivity.class.getSimpleName();
private CurrentWeather mCurrentWeather;
private GoogleApiClient mGoogleApiClient;
private double mLongitude;
private double mLatitude;

 @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
mGoogleApiClient = new GoogleApiClient.Builder(this)
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this)
            .addApi(LocationServices.API)
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this)
            .build();
mGoogleApiClient.connect();
}
@Override
public void onConnected(Bundle bundle) {
    Log.i(TAG, "Location services connected.");
    Location location = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
    mLatitude = location.getLatitude();
    mLongitude = location.getLongitude();
}

@Override
public void onConnectionSuspended(int i) {
    Log.i(TAG, "Location services suspended. Please reconnect.");

}

@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
    Log.i(TAG, "Location services failed.");

}

@Override
protected void onResume() {
    super.onResume();
    mGoogleApiClient.connect();
}

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

Answer 1

您错过了初始化 GoogleApiClient 对象..

 mGoogleApiClient = new GoogleApiClient.Builder(this)
                .addApi(LocationServices.API)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .build();

 mGoogleApiClient.connect();

请添加以上代码并检查。

在 gradle 中使用这个库。 com.google.android.gms:play-services:8.4.0

请引用以下链接获取位置信息。

Fused location provider example