Indoor positioning maps, haven't achieved positioning function, hope you can perfect affinity, and to share it out ... public class MainActivity extends Activity implements OnMapTouchListener, MapEventsListener { private static final long LAYER_ID = 5; public static final int MAP_ID = 1; private int nextModelId; private int nextObjectId; private int pinHeight; private AlertDialog.Builder mBuilder; private DBHelper mDBHelper; private SQLiteDatabase db; private Layer layer; private MapObjectContainer model; private MapWidget mapWidget; private TextPopup mapObjectInfoPopup;