如何从城市而不是整个世界开始谷歌地图？

Question

如何从默认城市启动谷歌地图（我有lat，lng和zoom）。现在，当我开始绘制地图时，首先我看到整个世界，然后将地图激活到我的位置。

Answer 1

谷歌地图Android API允许您通过修改地图相机来更改用户的地图视点。

CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(latLng, 15);

Answer 2

使用Google地图moveCamera(CameraUpdate update)来避免动画并指示您的位置示例块是： -

private void setUpMap() {
    mMap.addMarker(new MarkerOptions()
            .position(new LatLng(19.111990, 72.834034)).title("Marker"));
    CameraPosition cameraPosition = new CameraPosition.Builder()
            .target(new LatLng(19.111990, 72.834034))
            .zoom(15).build();
    mMap.moveCamera(CameraUpdateFactory
            .newCameraPosition(cameraPosition));
}

Answer 3

试试这个：

private LocationManager locationManager;
private Location location;
private Criteria criteria;

this.locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);

criteria = new Criteria();

location = locationManager.getLastKnownLocation(locationManager.getBestProvider(criteria, true));

                if (location != null) {
             // add marker on map at current location
                LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
                googleMap.addMarker(new MarkerOptions().position(latLng).title("I am here"));

                // Creating a LatLng object for the current location

                // Showing the current location in Google Map
                googleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));

                // to show current location on opening map
                googleMap.animateCamera(CameraUpdateFactory.newLatLngZoom(latLng, 15));
                }