Android谷歌地图标记不断点击相同的点

Question

当我点击地图上的某个地方时，应用程序在当前位置和目的地之间绘制折线（点击）。我希望那个目的地标记一直点击自己（每隔几秒），所以当用户移动新的多段线正在绘制时（更新最后一个）。

我试着用处理程序和一堆东西，并没有找到解决方案。

任何答案将不胜感激。

private ArrayList<LatLng> mClickedPoints; 

/** Setting onclick listener for the map */ 
mMap.setOnMapClickListener(new GoogleMap.OnMapClickListener() { 

    @Override 
    public void onMapClick(LatLng point) { 

     /** 
     * Clearing map if user clicks on map more then one time. 
     * Reseting View widgets and arrays, adding points of interests 
     */ 
     if (mClickedPoints.size() > 1) { 
      mMap.clear(); 
      mClickedPoints.clear(); 
      mClickedPoints = new ArrayList<>(); 
     } 

     /** Adding current location to the ArrayList */ 
     mClickedPoints.add(start); 
     Log.i("current location", start.toString()); 

     MarkerOptions options = new MarkerOptions(); 
     options.position(start); 

     /** Destination click */ 
     mClickedPoints.add(point); 

     /** Setting the position of the marker */ 
     options.position(point); 

     /** Checks if start and end locations are captured */ 
     if (mClickedPoints.size() >= 2) { 
      orig = mClickedPoints.get(0); 
      dest = mClickedPoints.get(1); 
     } 
     mMap.addMarker(options); 
     request_directions_and_get_response(); 
    } 
}); 

onLocationChanged（）重写：

@Override 
public void onLocationChanged(Location location) { 

    mLastLocation = location; 
    if (mCurrLocationMarker != null) { 
     mCurrLocationMarker.remove(); 
    } 

    /** Setting current location marker */ 
    start = new LatLng(location.getLatitude(),location.getLongitude()); 
    MarkerOptions markerOptions = new MarkerOptions(); 
    markerOptions.position(start); 
    markerOptions.title("Current Location"); 
    markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN)); 
    mCurrLocationMarker = mMap.addMarker(markerOptions); 
} 

Answer 1

为了使用点击的点ArrayList中，你有现在，你需要删除以前的原点，然后添加当前原点到ArrayList的开始，然后根据新的当前位置获取重新计算的方向。

事情是这样的：

@Override 
public void onLocationChanged(Location location) { 

    mLastLocation = location; 
    if (mCurrLocationMarker != null) { 
     mCurrLocationMarker.remove(); 
    } 

    /** Setting current location marker */ 
    start = new LatLng(location.getLatitude(),location.getLongitude()); 
    MarkerOptions markerOptions = new MarkerOptions(); 
    markerOptions.position(start); 
    markerOptions.title("Current Location"); 
    markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN)); 
    mCurrLocationMarker = mMap.addMarker(markerOptions); 

    //If there is a previous route drawn: 
    if (mClickedPoints.size() >= 2) { 
     //remove the old origin: 
     mClickedPoints.remove(0); 

     //add the new one at the 0th position: 
     mClickedPoints.add(0, start); 

     //set orig and dest for directions: 
     orig = mClickedPoints.get(0); 
     dest = mClickedPoints.get(1); 

     //get updated directions: 
     request_directions_and_get_response(); 
    } 

}