拖动时如何在LinearLayouts中交换ImageViews

Question

我正在尝试制作一个3x3网格/ 4x4网格上的益智游戏，您需要交换“图块”以使图像整体，并且只能垂直和水平移动，并且只能与空图块交换。每个瓷砖都是图像的一部分。有一个这样的实体游戏，但我忘记了它的名字。任何知道的人都会有很大的帮助！

所以我的问题是当我将图像从任何LinearLayout拖到另一个时，它是ImageView吸收在Layout中。我想要做的是交换两个图像。

onDragListener只获取被拖动的视图。我不知道如何在目的地布局中获取图像。

这是我的代码：

MainActivity.java

package com.example.puzzle;

import android.app.Activity;
import android.content.ClipData;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.DragEvent;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.DragShadowBuilder;
import android.view.View.OnDragListener;
import android.view.View.OnTouchListener;
import android.view.ViewGroup;
import android.widget.LinearLayout;

public class MainActivity extends Activity {

/** Called when the activity is first created. */

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    findViewById(R.id.myimage1).setOnTouchListener(new MyTouchListener());
    findViewById(R.id.myimage2).setOnTouchListener(new MyTouchListener());
    findViewById(R.id.myimage3).setOnTouchListener(new MyTouchListener());
    findViewById(R.id.myimage4).setOnTouchListener(new MyTouchListener());
    findViewById(R.id.topleft).setOnDragListener(new MyDragListener());
    findViewById(R.id.topright).setOnDragListener(new MyDragListener());
    findViewById(R.id.bottomleft).setOnDragListener(new MyDragListener());
    findViewById(R.id.bottomright).setOnDragListener(new MyDragListener());

  }

  private final class MyTouchListener implements 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 {
        return false;
      }
    }
  }

  class MyDragListener implements OnDragListener {
    Drawable enterShape = getResources().getDrawable(R.drawable.shape_droptarget);
    Drawable normalShape = getResources().getDrawable(R.drawable.shape);

@Override
public boolean onDrag(View v, DragEvent event) {
  int action = event.getAction();
  switch (event.getAction()) {
  case DragEvent.ACTION_DRAG_STARTED:
    // Do nothing
    break;
  case DragEvent.ACTION_DRAG_ENTERED:
    v.setBackgroundDrawable(enterShape);
    break;
  case DragEvent.ACTION_DRAG_EXITED:
    v.setBackgroundDrawable(normalShape);
    break;
  case DragEvent.ACTION_DROP:
    // Dropped, reassign View to ViewGroup

    View view = (View) event.getLocalState();
    ViewGroup owner = (ViewGroup) view.getParent();
    owner.removeView(view);
    LinearLayout container = (LinearLayout) v;
    container.addView(view);
    view.setVisibility(View.VISIBLE);
    break;
  case DragEvent.ACTION_DRAG_ENDED:
    v.setBackgroundDrawable(normalShape);
  default:
    break;
  }
  return true;
    }
  }
} 

main.xml中

<?xml version="1.0" encoding="utf-8"?>
<GridLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:columnCount="2"
android:columnWidth="300dp"
android:orientation="vertical"
android:rowCount="2"
android:stretchMode="columnWidth" >

<LinearLayout
    android:id="@+id/topleft"
    android:layout_width="160dp"
    android:layout_height="200dp"
    android:layout_column="0"
    android:layout_row="0"
    android:background="@drawable/shape" >

    <ImageView
        android:id="@+id/myimage1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_column="0"
        android:layout_row="0"
        android:src="@drawable/ic_launcher" />
</LinearLayout>

<LinearLayout
    android:id="@+id/topright"
    android:layout_width="160dp"
    android:layout_height="200dp"
    android:layout_column="1"
    android:layout_row="0"
    android:background="@drawable/shape" >

    <ImageView
        android:id="@+id/myimage2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_column="0"
        android:layout_row="0"
        android:src="@drawable/ic_launcher" />
</LinearLayout>

<LinearLayout
    android:id="@+id/bottomleft"
    android:layout_width="160dp"
    android:layout_height="200dp"
    android:layout_column="0"
    android:layout_row="1"
    android:background="@drawable/shape" >

    <ImageView
        android:id="@+id/myimage3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_launcher" />
</LinearLayout>

<LinearLayout
    android:id="@+id/bottomright"
    android:layout_width="160dp"
    android:layout_height="200dp"
    android:layout_column="1"
    android:layout_row="1"
    android:background="@drawable/shape" >

    <ImageView
        android:id="@+id/myimage4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_column="0"
        android:layout_row="0"
        android:src="@drawable/ic_launcher" />
</LinearLayout>

感谢您的帮助。抱歉我的英文。