Question

Google Maps v2 - set both my location and zoom in

可能重复

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_g_maps);
        GoogleMap googleMap;
        LatLng myPosition;


        SupportMapFragment fm = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);

        googleMap = fm.getMap();
        googleMap.setMyLocationEnabled(true);
        LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
        Criteria criteria = new Criteria();
        String provider = locationManager.getBestProvider(criteria, true);
        Location location = locationManager.getLastKnownLocation(provider);

                if(location!=null){
        double latitude = location.getLatitude();
        double longitude = location.getLongitude();
        LatLng latLng = new LatLng(latitude, longitude);
        myPosition = new LatLng(latitude, longitude);


    }

}
}

我尝试添加：

CameraUpdate center=
        CameraUpdateFactory.newLatLng(new LatLng(latitude,
                                                 longitude));
    CameraUpdate zoom=CameraUpdateFactory.zoomTo(15);

    googleMap.moveCamera(center);
    googleMap.animateCamera(zoom);

或

 googleMap.moveCamera( CameraUpdateFactory.newLatLngZoom(new LatLng(latitude, longitude) ,4) );

但是一旦我点击调用此方法的按钮，Google地图就不会自动放大。我仍然可以使用Google界面来点击我的位置，但我想让它自动放大。

请帮忙吗？

Answer 1

尝试这是您的问题的简单解决方案

LatLng coordinate = new LatLng(lat, lng);
CameraUpdate yourLocation = CameraUpdateFactory.newLatLngZoom(coordinate, 5);
map.animateCamera(yourLocation);

还有..

可以一次改变位置，变焦，方位和倾斜。也可以在animatecamera调用上设置持续时间。

CameraPosition cameraPosition = new CameraPosition.Builder()
    .target(MOUNTAIN_VIEW)      // Sets the center of the map to Mountain View
    .zoom(17)                   // Sets the zoom
    .bearing(90)                // Sets the orientation of the camera to east
    .tilt(30)                   // Sets the tilt of the camera to 30 degrees
    .build();                   // Creates a CameraPosition from the builder
map.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));

在这里查看文档：

https://developers.google.com/maps/documentation/android/views?hl=fr-FR#moving_the_camera

Answer 2

GoogleMap googleMap;


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

    googleMap = ((MapFragment) getFragmentManager().findFragmentById(
            R.id.map)).getMap();

    Location locationCt;
    LocationManager locationManagerCt = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    locationCt = locationManagerCt
            .getLastKnownLocation(LocationManager.GPS_PROVIDER);

    LatLng latLng = new LatLng(locationCt.getLatitude(),
            locationCt.getLongitude());
    googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
    googleMap.addMarker(new MarkerOptions().position(latLng)
            .title("My Spot").snippet("This is my spot!")
            .icon(BitmapDescriptorFactory.fromResource(R.drawable.ic_car)));

    googleMap.setMyLocationEnabled(true);

    googleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));

    // Zoom in the Google Map
    googleMap.animateCamera(CameraUpdateFactory.zoomTo(15));
}

Answer 3

在您的XML文件中

<Button
   android:id="@+id/Bzoomin"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:onClick="onZoom"
   android:text="^" />

   <Button
       android:id="@+id/Bzoomout"
       style="?android:attr/buttonStyleSmall"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:layout_gravity="center_vertical"
       android:onClick="onZoom"
       android:text="v" />'

在您的Java文件中

 public void onZoom(View view)
 {
     if(view.getId() == R.id.Bzoomin)
     {
         mMap.animateCamera(CameraUpdateFactory.zoomIn());
     }
     if(view.getId() == R.id.Bzoomout)
     {
         mMap.animateCamera(CameraUpdateFactory.zoomOut());
     }
 }

Answer 4

对于Kotlin

 val location = CameraUpdateFactory.newLatLngZoom(latlng, 15F)
 mMap.animateCamera(location)

让Google地图自动放大我的当前位置？

4 个答案: