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Im使用拖放操作將視圖拖動到目標上。 我很難搞清楚如何讓原始視圖在被拖動時被拖動到不可見狀態，並且如果拖動結束時再次可見，但它不會被拖放到目標上。Android拖放可見/不可見
final TextView dragText1 = (TextView) v.findViewById(R.id.text_user_drags_1);
dragText1.setOnTouchListener(new MyTouchListener());
final TextView target1 = (TextView) v.findViewById(R.id.text_target_1);
target1.setOnDragListener(new MyDragListener());
private final class MyTouchListener implements View.OnTouchListener {
public boolean onTouch(View view, MotionEvent motionEvent) {
if (motionEvent.getAction() == MotionEvent.ACTION_DOWN) {
ClipData data = ClipData.newPlainText("", "");
DragShadowBuilder shadowBuilder = new View.DragShadowBuilder(view);
view.startDrag(data, shadowBuilder, view, 0);
// view.setVisibility(View.INVISIBLE);
return true;
} else {
//view.setVisibility(View.VISIBLE);
return true;
}
}
}
class MyDragListener implements OnDragListener {
@Override
public boolean onDrag(View v, DragEvent event) {
int action = event.getAction();
switch (event.getAction()) {
case DragEvent.ACTION_DRAG_STARTED:
TextView draggedView2 = (TextView) event.getLocalState();
ViewGroup owner1 = (ViewGroup) draggedView2.getParent();
owner1.setVisibility(View.INVISIBLE);
Log.d(TAG, "DRAG STARTED");
break;
case DragEvent.ACTION_DRAG_ENTERED:
Log.d(TAG, "DRAG ENTERED");
break;
case DragEvent.ACTION_DRAG_EXITED:
Log.d(TAG, "DRAG EXITED");
break;
case DragEvent.ACTION_DROP:
// Dropped, reassign View to ViewGroup
TextView draggedView = (TextView) event.getLocalState();
ViewGroup owner = (ViewGroup) draggedView.getParent();
owner.setVisibility(View.INVISIBLE);
Log.d(TAG, "DRAG DROPPED");
break;
case DragEvent.ACTION_DRAG_ENDED:
if(event.getAction() == DragEvent.ACTION_DROP){
TextView draggedView3 = (TextView) event.getLocalState();
ViewGroup owner3 = (ViewGroup) draggedView3.getParent();
owner3.setVisibility(View.INVISIBLE);
}
TextView draggedView4 = (TextView) event.getLocalState();
ViewGroup owner4 = (ViewGroup) draggedView4.getParent();
owner4.setVisibility(View.VISIBLE);
Log.d(TAG, "DRAG ENDED");
default:
break;
}
return true;
}
}