Google地图：当前位置标记（GMaps的定期更新）

蓝点和精确度圆由地图自动管理，您无法对其进行更新或更改其符号系统。实际上，它是使用自己的LocationProvider自动管理的，因此可以获得最佳的位置解析度（您无需编写代码即可对其进行更新，只需使用即可启用它

mMap.setMyLocationEnabled(true);

如果要模拟它的行为，可以编写如下代码（您应该禁用我的location层

mMap.setMyLocationEnabled(false);

private BitmapDescriptor markerDescriptor;private int accuracyStrokeColor = Color.argb(255, 130, 182, 228);private int accuracyFillColor = Color.argb(100, 130, 182, 228);private Marker positionMarker;private Circle accuracyCircle;@Overrideprotected void onCreate(Bundle savedInstanceState) {    // ...    markerDescriptor = BitmapDescriptorFactory.fromResource(R.drawable.yourmarkericon);}@Overridepublic void onLocationChanged(Location location) {    double latitude = location.getLatitude();    double longitude = location.getLongitude();    float accuracy = location.getAccuracy();    if (positionMarker != null) {        positionMarker.remove();    }    final MarkerOptions positionMarkerOptions = new MarkerOptions() .position(new LatLng(latitude, longitude)) .icon(markerDescriptor) .anchor(0.5f, 0.5f);    positionMarker = mMap.addMarker(positionMarkerOptions);    if (accuracyCircle != null) {        accuracyCircle.remove();    }    final CircleOptions accuracyCircleOptions = new CircleOptions() .center(new LatLng(latitude, longitude)) .radius(accuracy) .fillColor(accuracyFillColor) .strokeColor(accuracyStrokeColor) .strokeWidth(2.0f);    accuracyCircle = mMap.addCircle(accuracyCircleOptions);}