为了响应touch事件，需要设置OnMapTouchListener

示例：

private void initMapEventsListener(){       mapWidget.setOnMapTouchListener(new OnMapTouchListener() {               public void onTouch(MapWidget map, MapTouchedEvent event) {                              List objectTouchEvents = event.getTouchedObjectIds();               // X coordinate of the touch in original image coordinates               int mapX = event.getMapX();     // Y coordinate of the touch in original image coordinates   int mapY = event.getMapY();   // X coordinate of the touch in screen coordinates                    int screenX = event.getScreenX();   // Y coordinate of the touch in screen coordinates               int screenY = event.getScreenY();                              if (objectTouchEvents.size() == 1) {                   ObjectTouchEvent objectTouchEvent = objectTouchEvents.get(0);                   // Id of the layer that the map object belongs to                   long layerId = objectTouchEvent.getLayerId();                   // Id of the map object that was touched.                   Object objectId = objectTouchEvent.getObjectId();                                        Toast.makeText(BrowseMapDemoActivity.this, "Touched object " + objectId + " on layer" + layerId + ", x: " + mapX + " y: " + mapY, Toast.LENGTH_SHORT).show();               }           }       });   }