如何在应用程序启动地图 activity 后立即在 android 中的地图中显示我的当前位置

Question

如何做才能在我打开我的应用程序的地图 activity 时立即显示我在 google 地图上的当前位置，并用当前街道填充文本视图 address.I 搜索了很多，但没有任何办法 this.even 运行时权限不是 working.The 按钮，该按钮将标记指向我当前的位置，没有显示 response.No 错误。这是我的地图 activity.

public class MapsActivity extends FragmentActivity implements OnMapReadyCallback,
    GoogleApiClient.ConnectionCallbacks,
    GoogleApiClient.OnConnectionFailedListener,
    GoogleMap.OnMarkerDragListener,
    GoogleMap.OnMapLongClickListener, View.OnClickListener{

private GoogleMap mMap;
private double vlatitude, vlongitude;
private GoogleApiClient vgoogleApiClient;
private Button getButton;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_maps);
    // Obtain the SupportMapFragment and get notified when the map is ready to be used.
    SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
            .findFragmentById(R.id.map);
    mapFragment.getMapAsync(this);

    //Initializing googleapi client
    vgoogleApiClient = new GoogleApiClient.Builder(this)
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this)
            .addApi(LocationServices.API)
            .build();

    if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION)
            != PackageManager.PERMISSION_GRANTED &&
            ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION)
                    != PackageManager.PERMISSION_GRANTED) {

        return;
    }

    mMap.setMyLocationEnabled(true);
    getButton = (Button) findViewById(R.id.buttongetme);
    getButton.setOnClickListener(this);
}

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

@Override
protected void onStop() {
    vgoogleApiClient.disconnect();
    super.onStop();
}
@Override
public void onMapReady(GoogleMap googleMap) {
    mMap = googleMap;

    LatLng sydney = new LatLng(-34, 151);
    mMap.addMarker(new MarkerOptions().icon(BitmapDescriptorFactory.fromResource(R.mipmap.tiltpink)).position(sydney).draggable(true).title("Marker in Sydney"));
    mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));
    mMap.setOnMarkerDragListener(this);
    mMap.setOnMapLongClickListener(this);
    mMap.getUiSettings().setMyLocationButtonEnabled(true);
}

private void getCurrentLocation() {

    if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {

        return;
    }
    Location location = LocationServices.FusedLocationApi.getLastLocation(vgoogleApiClient);
    if (location != null){
        vlongitude = location.getLongitude();
        vlatitude = location.getLatitude();
        moveMap();
    }
}

private void moveMap() {
    LatLng latLng = new LatLng(vlatitude,vlongitude);
    mMap.addMarker(new MarkerOptions().icon(BitmapDescriptorFactory.fromResource(R.mipmap.tiltpink)).position(latLng).draggable(true).title("Current Location"));

    mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
    mMap.animateCamera(CameraUpdateFactory.zoomTo(15));
}

@Override
public void onConnected(@Nullable Bundle bundle) {
    getCurrentLocation();

}

@Override
public void onConnectionSuspended(int i) {

}

@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {

}

@Override
public void onMapLongClick(LatLng latLng) {

    mMap.clear();
    mMap.addMarker(new MarkerOptions().icon(BitmapDescriptorFactory.fromResource(R.mipmap.tiltpink)).position(latLng).draggable(true).title("This is my loc"));

}

@Override
public void onMarkerDragStart(Marker marker) {

}

@Override
public void onMarkerDrag(Marker marker) {

}

@Override
public void onMarkerDragEnd(Marker marker) {

    vlatitude = marker.getPosition().latitude;
    vlongitude = marker.getPosition().longitude;
    moveMap();

}

@Override
public void onClick(View view) {

    if (view == getButton){
        getCurrentLocation();
        moveMap();
    }

}

Answer 1

这个方法解决了问题。

 @Override
public void onLocationChanged(Location location) {
    if (location != null) {
        LatLng latLang = new LatLng(location.getLatitude(),
                location.getLongitude());
        animateCameraToMarker(latLang, false);
        setMarker(latLang);
        getAddressFromLocation(latLang, source);
    }

   // stop location updates
    if (mGoogleApiClient != null) {
        LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
    }

}

如何在应用程序启动地图 activity 后立即在 android 中的地图中显示我的当前位置

How to show my current location in maps in android as soon as the app starts the map activity

android

google-maps

android-gps