FrameLayout

<?xml version="1.0" encoding="utf-8"?>
<!-- 
贞布局
所有的控件将会叠加在一起，最开始添加的在最后面。
 -->
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <TextView android:id="@+id/text1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:width="320dp"
        android:height="320dp"
        android:background="#f00">
    </TextView>
    <TextView android:id="@+id/text2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:width="280dp"
        android:height="280dp"
        android:background="#0f0">
    </TextView>
    <TextView android:id="@+id/text3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:width="240dp"
        android:height="240dp"
        android:background="#00f">
    </TextView>
    
</FrameLayout>

　　颜色切换的“霓虹灯”

package com.frank.layoutmanage;

import android.os.*;
import android.app.Activity;
import android.view.Menu;
import android.widget.*;
import java.util.Timer;
import java.util.TimerTask;

public class MainActivity extends Activity {
	private int currentColor = 0;
	//定义颜色数组
	final int[] colors = new int[]{
			R.color.color1,
			R.color.color2,
			R.color.color3
	};
	final int[] names = new int[]{
			R.id.text1,
			R.id.text2,
			R.id.text3
	};
	TextView[] views = new TextView[names.length];
	Handler handler = new Handler(){
		@Override
		public void handleMessage(Message msg)
		{
			if(msg.what==0x123)
			{
				for(int i = 0;i<names.length;i++)
				{
					views[i].setBackgroundResource(colors[(i+currentColor)%names.length]);
				}
				currentColor++;
			}
			super.handleMessage(msg);
		}
	};
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.frame_main);//指定一个布局文件
		for(int i = 0;i<names.length;i++)
		{
			views[i] = (TextView)super.findViewById(names[i]);
		}
		new Timer().schedule(new TimerTask(){
			@Override
			public void run()
			{
				//发送一条空消息通知系统
				handler.sendEmptyMessage(0x123);
			}
		}, 0,200);;
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

}