java - 单击按钮时获取当前位置

Question

我有一个谷歌地图应用程序，现在我添加了一个按钮。当我单击按钮时，我想收到一 strip 有我的坐标的消息(Toast)。哪种方法最简单？我还必须实现 onLocationChanged 类吗？

Answer 1

您可以使用不同的方式来实现它。我倾向于认为最适合您的任务是在按下我的位置按钮后显示 toast。

public class MapActivity extends FragmentActivity implements OnMapReadyCallback {
     private GoogleMap mMap;

     /**
     * Manipulates the map once available.
     * This callback is triggered when the map is ready to be used.
     * This is where we can add markers or lines, add listeners or move the camera. In this case,
     * we just add a marker near Sydney, Australia.
     * If Google Play services is not installed on the device, the user will be prompted to install
     * it inside the SupportMapFragment. This method will only be triggered once the user has
     * installed Google Play services and returned to the app.
     */
    @Override
    public void onMapReady(GoogleMap googleMap) {
        mMap = googleMap;

        //Show my location button
        mMap.setMyLocationEnabled(true);

        mMap.setOnMyLocationButtonClickListener(new GoogleMap.OnMyLocationButtonClickListener() {
            @Override
            public boolean onMyLocationButtonClick() {
                //Do something with your location. You can use mMap.getMyLocation(); 
                //anywhere in this class to get user location 
                Toast.makeText(MapActivity.this, String.format("%f : %f",
                        mMap.getMyLocation().getLatitude(), mMap.getMyLocation().getLongitude()), 
                        Toast.LENGTH_SHORT).show();
                return false;
            }
        });
    }
}

此外，您还可以在用户位置每次更改时显示 toast。为此，请设置 OnMyLocationChangeListener

    mMap.setOnMyLocationChangeListener(new GoogleMap.OnMyLocationChangeListener() {
        @Override
        public void onMyLocationChange(android.location.Location location) {
            //...
        }
    });