Question

我有mapView，我以编程方式处理触摸事件。

问题是：如果mapview的ZoomOut达到最大值，则平移非常小且速度慢，并且使mapView符合ZoomIn，平移越来越大。换句话说：zoomIN越大，平移动作越大。

如何进行平移移动而不是缩放，因此每次移动地图时，无论缩放级别如何，都会移动相同的距离？

这是我的Android客户端

private double savedTouchedX = -1;
private double savedTouchedY = -1;
....

mapView.setOnTouchListener(new MapView.OnTouchListener() {

    @Override
    public boolean onTouch(View arg0, MotionEvent event) {
        int action = event.getAction();

         switch(action)
         {
            case MotionEvent.ACTION_DOWN:
                savedTouchedX = event.getX();
                savedTouchedY = event.getY();
                break;
            case MotionEvent.ACTION_MOVE:
                doPanning(event, mapView);
                break;
            case MotionEvent.ACTION_UP:
                doPanning(event, mapView);
                savedTouchedX = -1;
                savedTouchedY = -1;
                break;
            default:
                break;
         }
         return true;
    }
});

...

//move mapView
private boolean doPanning(MotionEvent e, MapView mapView)
{
if(savedTouchedX >= 0 && savedTouchedY >= 0)
{
    IGeoPoint mapCenter = mapView.getMapCenter();
    GeoPoint panToCenter = new GeoPoint((int)(mapCenter.getLatitudeE6() + (e.getY() - savedTouchedY) * 1E5),
    (int)(mapCenter.getLongitudeE6() - (e.getX() - savedTouchedX) * 1E5));
    mapView.getController().setCenter(panToCenter);
}
savedTouchedX = e.getX();
savedTouchedY = e.getY();
return true;
}

Answer 1

基于TouchEvent，以编程方式移动地图

yourFrameLayout.setOnTouchListener(new OnTouchListener() {

    @Override
    public boolean onTouch(View v , MotionEvent event) {
        return gestureDetector.onTouchEvent(event);
    }
});

SimpleOnGestureListener listener = new SimpleOnGestureListener() {
    @Override
    public boolean onFling(MotionEvent e1 , MotionEvent e2 , float velocityX , float velocityY) {

        float Xdirection = e1.getX() - e2.getX();
        float Ydirection = e1.getY() - e2.getY();

        //TODO- Do some calculations & change the maps lat & lon. 
        // Also consider zoom level while calculating.

        final double newLat = (getOldLat - (moveSomeLatBasedOnXDirection)));
        final double newLon = (getOldLon - (moveSomeLatBasedOnYDirection)));

        CameraUpdate center = CameraUpdateFactory.newLatLng(new LatLng( newLat, newLon));

        map.moveCamera(center);


        return super.onFling(e1, e2, velocityX, velocityY);
    };

};
GestureDetector gestureDetector = new GestureDetector(getActivity(), listener);

Answer 2

隐藏你的观点。并禁用触摸它。实际上你需要的是什么。

 memecontentView.setVisibility(View.GONE);

此节目视图。

memecontentView.setVisibility(View.VISIBLE);
memecontentView.bringToFront();

转移到另一个布局

public void moveView(View view,ViewGroup destination) {
    ((ViewGroup)view.getParent()).removeView(view);
     //Also you can set LayoutParams here
     destination.addView(src);
     destination.getChildAt(destination.indexOf(src)).bringToFront();
}

用法：

moveView(mapView,yourFrameLayout);

Answer 3

“我需要用另一张图片覆盖地图”

=＆GT;不完全确定了解其他图像应该如何表现。

如果您将其设置为OSMBonusPack GroundOverlay，则会将其绘制在地图上方。地图将对所有事件做出反应（平移，缩放），此上方图像也将根据地图移动进行移动。

如果此上图不应根据地图移动移动，则可以实现新的（但非常简单的）叠加，在mapview上的固定位置绘制图像。它的绘制方法应该是：

@Override protected void draw(Canvas c, MapView mapView, boolean shadow) {
  if (shadow)
    return;
  canvas.drawBitmap(myImage, screenX, screenY, null);
}

在mapView中平移无法正常工作

3 个答案: