Question

我尝试在我的项目中实施一些拖放系统，到目前为止我已经：

@Override
    public boolean onDrag(View eventView, DragEvent event) {

    final int action = event.getAction();

    switch (action) {

    case DragEvent.ACTION_DRAG_STARTED:

        DragAndDropState.itWasDropped = false;

        draggedView = (View) event.getLocalState();

        if (draggedView.getParent() != null) {


            draggedTargetParent = (View) draggedView.getParent();
            DragAndDropState.dragStartPosition = (Integer) draggedTargetParent.getTag();

            Log.i("START draggedView ", draggedView.toString());
            Log.i("START parent: ", draggedTargetParent.toString());

        }



        ((ViewGroup) eventView).removeView((View) event.getLocalState());

        return true;


    case DragEvent.ACTION_DROP: //............... more code

我在浏览一个视图后在logcat中看到了：

09-03 14:08:48.236: I/START draggedView(12796): hu.fun.views.slot.ItemInSlotView@42ae2ef0
    09-03 14:08:48.236: I/START parent:(12796): hu.fun.views.slot.Slot@42ab7e68
    09-03 14:08:48.236: I/START draggedView(12796): hu.fun.views.slot.ItemInSlotView@42ae2ef0
    09-03 14:08:48.236: I/START parent:(12796): hu.fun.views.slot.Slot@42ab7e68
    09-03 14:08:48.236: I/START draggedView(12796): hu.fun.views.slot.ItemInSlotView@42ae2ef0
    09-03 14:08:48.236: I/START parent:(12796): hu.fun.views.slot.Slot@42ab7e68
    09-03 14:08:48.236: I/START draggedView(12796): hu.fun.views.slot.ItemInSlotView@42ae2ef0
    09-03 14:08:48.246: I/START parent:(12796): hu.fun.views.slot.Slot@42ab7e68
    09-03 14:08:48.246: I/START draggedView(12796): hu.fun.views.slot.ItemInSlotView@42ae2ef0
    09-03 14:08:48.246: I/START parent:(12796): hu.fun.views.slot.Slot@42ab7e68
    09-03 14:08:48.246: I/START draggedView(12796): hu.fun.views.slot.ItemInSlotView@42ae2ef0
    09-03 14:08:48.246: I/START parent:(12796): hu.fun.views.slot.Slot@42ab7e68
    09-03 14:08:49.137: I/ViewRootImpl(12796): Reporting drop result: true

这是对的。 我得到了6个（6个！） onDragEvents，在一个有针对性的视图上用一个onLongClick侦听器触发了一个longclick 。

任何人都可以解释我为什么会这样，或者为什么这么好？

我真的只想使用这些东西中的一个，这对于使用这样的消息来淹没logcat是纯粹的反感。我无法调试这样的方式。

为什么onDrag方法运行数百万次？

0 个答案: