我如何长时间点击一个图形页面，这样一个位置标记出现在地图上这一点？

How do I long click on a mapview so that a place marker appears at that point on the map?

我尝试没有成功，一对夫妇的方式：

I tried a couple ways without success:

1）使用 setOnLongClickListener 在 MapvView 从未检测到的longclicks。

1) Using setOnLongClickListener on the MapvView which never detected the longclicks.

2）我的另一个想法是延长图形页面来替代 dispatchTouchEvent ..创​​建GestureDetector向长回应preSS回调。但我中途停留在这里，因为我无法得到一个处理我的子类的图形页面。即。

2) My other idea was to extend MapView to override dispatchTouchEvent .. Create a GestureDetector to respond to longpress callback. But I was stuck midway here as I could not get a handle to my subclassed Mapview. i.e.

MyMapview mymapview; //MyMapView extends MapView

//results in a classcast exception
mymapView = (MyMapView) findViewById(R.id.map);

3）我知道如何去尝试这样做的唯一方法是： 检测 MotionEvent.ACTION_DOWN 和发布延迟可运行到一个处理并检测长preSS如果两个事件：acton_move或action_up，都没有发生

3) The only other way I know how to try this is: Detect a MotionEvent.ACTION_DOWN and post a delayed runnable to a handler and detect longpress if the two other events: acton_move or an action_up, have not happened.

有人可以提供任何这些方法的思想，以检测长presses？

Can someone provide thoughts on any of these methods to detect long presses?

推荐答案

我发现一个更简单的方法。只要覆盖在不画任何东西，并用它来识别使用GestureDetector手势列表中第一个覆盖。它应该返回true，如果它处理的事件，因此它不会得到传播。

I've found an even easier way. Just make an overlay as the first overlay in the list that does not draw anything and use it to recognize gestures using the GestureDetector. It should then return true if it handled the event so it doesn't get propagated.

    List<Overlay> overlays = mapView.getOverlays();
    overlays.clear();
    overlays.add(new MapGestureDetectorOverlay(new MyOnGestureListener()));

和这里的类：

public class MapGestureDetectorOverlay extends Overlay implements OnGestureListener {
 private GestureDetector gestureDetector;
 private OnGestureListener onGestureListener;

 public MapGestureDetectorOverlay() {
  gestureDetector = new GestureDetector(this);
 }

 public MapGestureDetectorOverlay(OnGestureListener onGestureListener) {
  this();
  setOnGestureListener(onGestureListener);
 }

 @Override
 public boolean onTouchEvent(MotionEvent event, MapView mapView) {
  if (gestureDetector.onTouchEvent(event)) {
   return true;
  }
  return false;
 }

 @Override
 public boolean onDown(MotionEvent e) {
  if (onGestureListener != null) {
   return onGestureListener.onDown(e);
  }
  return false;
 }

 @Override
 public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
   float velocityY) {
  if (onGestureListener != null) {
   return onGestureListener.onFling(e1, e2, velocityX, velocityY);
  }
  return false;
 }

 @Override
 public void onLongPress(MotionEvent e) {
  if (onGestureListener != null) {
   onGestureListener.onLongPress(e);
  }
 }

 @Override
 public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
   float distanceY) {
  if (onGestureListener != null) {
   onGestureListener.onScroll(e1, e2, distanceX, distanceY);
  }
  return false;
 }

 @Override
 public void onShowPress(MotionEvent e) {
  if (onGestureListener != null) {
   onGestureListener.onShowPress(e);
  }
 }

 @Override
 public boolean onSingleTapUp(MotionEvent e) {
  if (onGestureListener != null) {
   onGestureListener.onSingleTapUp(e);
  }
  return false;
 }

 public boolean isLongpressEnabled() {
  return gestureDetector.isLongpressEnabled();
 }

 public void setIsLongpressEnabled(boolean isLongpressEnabled) {
  gestureDetector.setIsLongpressEnabled(isLongpressEnabled);
 }

 public OnGestureListener getOnGestureListener() {
  return onGestureListener;
 }

 public void setOnGestureListener(OnGestureListener onGestureListener) {
  this.onGestureListener = onGestureListener;
 }
}