拖放视图：即使拖动到新位置后仍然返回到原始位置

我想在我的测试应用中向文本视图添加拖放功能主布局包含一个相关布局（RL1），其中inturn包含另外的RelativeLayout（RL2）现在RL2包含可以能够拖动并随时随地下降拖放视图：即使拖动到新位置后仍然返回到原始位置

但是，当我在其倒拖，但去TextView的执行拖我放弃它，它返回到其originsl位置一个TextView 请帮我

我mainactivity

public class MainActivity extends Activity 
{ 

TextView tv; 
LayoutParams lParams; 
RelativeLayout layout; 
private static final String Tv_TAG =" TV_DRAG"; 
@Override 
protected void onCreate(Bundle savedInstanceState) 
{ 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 

    tv = (TextView) findViewById(R.id.mainTextView1); 
    tv.setTag(Tv_TAG); 
    tv.setOnTouchListener(new MyTouchListener()); 

    layout = (RelativeLayout) findViewById(R.id. draggableRelativeLayout); 
    layout.setOnDragListener(new MyDragListener()); 
} 


private class MyTouchListener implements OnTouchListener 
{ 

    @Override 
    public boolean onTouch(View v, MotionEvent event) 
    { 
     ClipData.Item item = new ClipData.Item((CharSequence) v.getTag()); 
     String[] mimeTypes ={ClipDescription.MIMETYPE_TEXT_PLAIN}; 
     ClipData dragData = new ClipData(v.getTag().toString(), mimeTypes, item); 

     View.DragShadowBuilder shdwbldr = new View.DragShadowBuilder(v); 

     v.startDrag(dragData, shdwbldr, v, 0); 
     v.setVisibility(View.INVISIBLE); 
     return true; 
    } 


} 

private class MyDragListener implements OnDragListener 
{ 

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

     View view = (View) event.getLocalState(); 

     switch (event.getAction()) { 
     case DragEvent.ACTION_DRAG_STARTED: 
      lParams =(RelativeLayout.LayoutParams)view.getLayoutParams(); 
      break; 
      case DragEvent.ACTION_DRAG_ENTERED: 

       int x_cord = (int) event.getX(); 
       int y_cord = (int) event.getY(); 

       break; 
      case DragEvent.ACTION_DRAG_EXITED: 

       x_cord = (int) event.getX(); 
       y_cord = (int) event.getY(); 
       lParams.leftMargin = x_cord; 
       lParams.topMargin = y_cord; 

       view.setLayoutParams(lParams); 

       break; 
      case DragEvent.ACTION_DROP: 
        // Dropped, reassign View to ViewGroup 

        ViewGroup owner = (ViewGroup) view.getParent(); 
        owner.removeView(view); 
        RelativeLayout container = (RelativeLayout) v; 
        container.addView(view); 
        view.setVisibility(View.VISIBLE); 
        break; 
      case DragEvent.ACTION_DRAG_ENDED: 

        break; 
      default: break; 

     } 

     return true; 
    } 
} 

}

**我的布局**

<RelativeLayout 
xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_height="fill_parent" 
android:layout_width="fill_parent" 
android:background="#AE9C9B" 
android:id="@+id/ draggableRelativeLayout "> 

<RelativeLayout 
    android:layout_height="match_parent" 
    android:layout_width="match_parent" 
    android:background="@null" 
    android:id="@+id/mainRelativeLayout1"> 

    <TextView 
     android:layout_height="wrap_content" 
     android:text="DRAG ME" 
     android:textAppearance="?android:attr/textAppearanceLarge" 
     android:layout_width="wrap_content" 
     android:layout_margin="10dp" 
     android:id="@+id/mainTextView1"/> 

</RelativeLayout>

来源

2016-06-01 user5894647

理解代码你正在使用，并阅读你拖动的'View.Shadow'。视图隐藏，阴影正在移动。 [阅读正在使用的文档]（https://developer.android.com/guide/topics/ui/drag-drop.html）。 – Bonatti

@Bonatti你能否详细说明我的错误 – user5894647

你不会将新坐标设置为拖动视图。 – yennsarah

你需要新的坐标设置为您的观点：

case DragEvent.ACTION_DROP: 
    v.setX(event.getX()); 
    v.setY(event.getY()); 
    break;

来源

2016-06-01 11:53:08 yennsarah

拖放视图：即使拖动到新位置后仍然返回到原始位置

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