无法使 Android 位置 API 工作

Question

我的目标是获取某人的当前位置并在 Google 地图上的那个位置放置一个标记。该位置似乎正在返回 null。当我调试时，似乎 OnConnection 回调的方法也不起作用。该设备已连接并且运行良好，因为我可以使用允许查找位置但不提供位置数据的 mMap.setMyLocationEnabled。我运行使用 HTC One M8。

private GoogleMap mMap; // Might be null if Google Play services APK is not available.
private GoogleApiClient mGoogleApiClient;
private Location mLastLocation;
private LatLng mLastLocationLatLng;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_maps);
    mGoogleApiClient = new GoogleApiClient.Builder(this)
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this)
            .addApi(LocationServices.API)
            .build();
    setUpMapIfNeeded();
}

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

private void setUpMapIfNeeded() {
    // Do a null check to confirm that we have not already instantiated the map.
    if (mMap == null) {
        // Try to obtain the map from the SupportMapFragment.
        mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
                .getMap();
        // Check if we were successful in obtaining the map.
        if (mMap != null) {
            setUpMap();
        }
    }
}


private void setUpMap() {
    mMap.setMyLocationEnabled(true);
    mMap.setOnMapClickListener(new GoogleMap.OnMapClickListener() {
        @Override
        public void onMapClick(LatLng latLng) {
            mMap.addMarker(new MarkerOptions().position(latLng).title("Test"));
            mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(latLng, 10), 500, null);
        }
    });

    // Zoom in, animating the camera.
    //mMap.animateCamera(CameraUpdateFactory.zoomTo(10), 2000, null);
}

@Override
public void onConnected(Bundle bundle) {
    //Gets last location of user - is usually the current
    mLastLocation = LocationServices.FusedLocationApi.getLastLocation(
            mGoogleApiClient);
    if (mLastLocation != null) {
        mLastLocationLatLng = new LatLng(mLastLocation.getLatitude(), mLastLocation.getLongitude());
        mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(mLastLocationLatLng, 15));
    }
    else {
        LatLng latLng = new LatLng(0,0);
        Toast.makeText(this, "Location not Found", Toast.LENGTH_LONG).show();
    }


}
@Override
public void onConnectionSuspended(int i) {

}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {

}
}

Answer 1

您没有在任何地方打电话给 googleApiClient.connect();。这就是 none 的连接相关回调被触发的原因。

无法使 Android 位置 API 工作

Unable to get the Android Location API to work

android

location

google-maps