一、佈局檔案相關定義

<?xml version="1.0" encoding="utf-8"?>
<!-- xmlns:android="http://schemas.android.com/apk/res/android" -->
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:gravity="center_horizontal">
    <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
	    <ImageView 
	        android:id="@+id/iv1"
	        android:src="@drawable/baiyang"
	        android:layout_width="100dp"
	        android:layout_height="150dp"
	        android:onClick="iv1click"/>
	    <ImageView 
	        android:id="@+id/iv2"
	        android:src="@drawable/jinniu"
	        android:layout_width="100dp"
	        android:layout_height="150dp"
	        android:layout_marginLeft="50dp"
	        android:layout_marginTop="50dp"
	        android:onClick="iv2click"/>
    </RelativeLayout>
    <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
	    <ImageView 
	        android:id="@+id/iv3"
	        android:src="@drawable/baiyang"
	        android:layout_width="100dp"
	        android:layout_height="150dp"
	        android:onClick="iv3click"/>
	    <ImageView 
	        android:id="@+id/iv4"
	        android:src="@drawable/jinniu"
	        android:layout_width="100dp"
	        android:layout_height="150dp"
	        android:layout_marginLeft="50dp"
	        android:layout_marginTop="50dp"
	        android:onClick="iv4click"/>
    </RelativeLayout>
</LinearLayout>
 

public void iv1click(View view)
{
	ViewGroup vg = (ViewGroup)view.getParent();
	int index = vg.indexOfChild(view);
	vg.bringChildToFront(vg.getChildAt(index));
	vg.invalidate();
}
public void iv2click(View view)
{
	ViewGroup vg = (ViewGroup)view.getParent();
	int index = vg.indexOfChild(view);
	vg.bringChildToFront(vg.getChildAt(index));
	vg.invalidate();
}
public void iv3click(View view)
{
	ViewGroup vg = (ViewGroup)view.getParent();
	int index = vg.indexOfChild(view);
	vg.bringChildToFront(vg.getChildAt(index));
	vg.invalidate();
}
public void iv4click(View view)
{
	ViewGroup vg = (ViewGroup)view.getParent();
	int index = vg.indexOfChild(view);
	vg.bringChildToFront(vg.getChildAt(index));
	vg.invalidate();
}