如何在Google地圖中將相機設置為用戶位置

Question

我已經設置了代碼，因此可以加載地圖，但是直到他們按下縮放按鈕時，它才會自動轉到用戶所在的位置。 我希望它是從用戶位置開始還是至少在地圖出現后的幾秒鍾內加載完畢。

Answer 1

在onMapready中使用此代碼

@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
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);

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

        CameraUpdate center = CameraUpdateFactory.newLatLng(new LatLng(location.getLatitude(), location.getLongitude()));
        CameraUpdate zoom = CameraUpdateFactory.zoomTo(11);
        mMap.clear();

        MarkerOptions mp = new MarkerOptions();

        mp.position(new LatLng(location.getLatitude(), location.getLongitude()));

        mp.title("my position");

        mMap.addMarker(mp);
        mMap.moveCamera(center);
        mMap.animateCamera(zoom);

    }
});}}

Answer 2

xml代碼添加地圖，如下所示：

<?xml version="1.0" encoding="utf-8"?>
<fragment
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.SupportMapFragment"/>

添加java代碼

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.map);
map = ((SupportMapFragment) 
getSupportFragmentManager().findFragmentById(R.id.map)).getMap();

locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, MIN_TIME, MIN_DISTANCE, this); //You can also use LocationManager.GPS_PROVIDER and LocationManager.PASSIVE_PROVIDER        
  }

@Override
public void onLocationChanged(Location location) {
LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(latLng, 10);
map.animateCamera(cameraUpdate);
locationManager.removeUpdates(this);
  }

 @Override
 public void onStatusChanged(String provider, int status, Bundle extras) { }

 @Override
 public void onProviderEnabled(String provider) { }

 @Override
 public void onProviderDisabled(String provider) { }
 }

在清單中添加權限

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>

試試這個代碼，它可以幫助您