拖放到目標後放回到原來的位置與Android的陰影？

Question

ondrag當類別：

private class ChoiceDragListener implements OnDragListener { 

    @Override 
    public boolean onDrag(View v, DragEvent event) { 
     switch (event.getAction()) { 
     case DragEvent.ACTION_DRAG_STARTED: 
      // no action necessary 
      break; 
     case DragEvent.ACTION_DRAG_ENTERED: 
      // no action necessary 
      break; 
     case DragEvent.ACTION_DRAG_EXITED: 
      // no action necessary 
      break; 
     case DragEvent.ACTION_DROP: 
      // handle the dragged view being dropped over a drop view 
      View view = (View) event.getLocalState(); 

      dropTarget = (RelativeLayout) v; 

      dropped = (RelativeLayout) view; 
      tagDropped = dropped.getTag().toString(); 

      Log.i("tagDropped", "" + tagDropped); 
      tagDropTarget = dropTarget.getTag().toString(); 
      Log.i("tagDropTarget", "" + tagDropTarget); 

      matchTag(); 

      break; 
     case DragEvent.ACTION_DRAG_ENDED: 
      // no action necessary 
      break; 
     default: 
      break; 
     } 
     return true; 
    } 
} 

ChoiceTouchListener類：

private final class ChoiceTouchListener implements OnTouchListener { 
    public boolean onTouch(View view, MotionEvent motionEvent) { 
     if (motionEvent.getAction() == MotionEvent.ACTION_DOWN) { 
      /* 
      * Drag details: we only need default behavior - clip data could 
      * be set to pass data as part of drag - shadow can be tailored 
      */ 
      ClipData data = ClipData.newPlainText("", ""); 
      DragShadowBuilder shadowBuilder = new View.DragShadowBuilder(
        view); 
      // start dragging the item touched 
      view.startDrag(data, shadowBuilder, view, 0); 
      return true; 
     } else { 
      return false; 
     } 
    } 
} 

現在我想在原來的位置移動對象，其中就拖

我尋找這樣的，但沒有回答任何一個drag and drop with onDraglistener animate to go back to original position if not dropped on target

Answer 1

首先得到拖動控制和拖動接收器控制之間的距離： textview1是牽引控制 textview2是拖動接收機控制

//if text view2 is below textview one and text view 2 is on the right of text view one 
int topMargin=textview2_top_margin - textview1_top_margin 
int leftMargin=textview2_left_margin - textview1_left_margin 

public void animation() { 
    Animation animation = new TranslateAnimation(left_margin, 0, topMargin, 0); 
    animation.setDuration(1000); 
    controlToAnimate.startAnimation(animation); 
}