Android突击：FrameLayout制作霓虹灯效果

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:layout_width="fill_parent" android:layout_height="fill_parent">
	<TextView android:id="@+id/textview1" android:layout_width="300dp"
		android:layout_height="300dp" android:layout_gravity="center" />
	<TextView android:id="@+id/textview2" android:layout_width="240dp"
		android:layout_height="240dp" android:layout_gravity="center" />
	<TextView android:id="@+id/textview3" android:layout_width="180dp"
		android:layout_height="180dp" android:layout_gravity="center" />
	<TextView android:id="@+id/textview4" android:layout_width="120dp"
		android:layout_height="120dp" android:layout_gravity="center" />
	<TextView android:id="@+id/textview5" android:layout_width="60dp"
		android:layout_height="60dp" android:layout_gravity="center" />
</FrameLayout>
 

package cn.eoe.neonlight;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
public class Main extends Activity implements Runnable {
	// 5个TextView的颜色值
	private int[] colors = new int[] { 0xFFFF0000, 0xFF00FF00, 0xFF0000FF,
			0xFFFF00FF, 0xFF00FFFF };
	// 每一次颜色的下一个颜色的索引，最后一个颜色的下一个颜色是第一个颜色，相当于循环链表
	private int[] nextColorPointers = new int[] { 1, 2, 3, 4, 0 };
	private View[] views; // 保存5个TextView
	private int currentColorPointer = 0; // 当前颜色索引（指针）
	private Handler handler;
	@Override
	public void run() {
		int nextColorPointer = currentColorPointer;
		for (int i = views.length - 1; i >= 0; i--) {
			// 设置当前TextView的背景颜色
			views[i].setBackgroundColor(colors[nextColorPointers[nextColorPointer]]);
			// 获得下一个TextView的背景颜色值的索引（指针）
			nextColorPointer = nextColorPointers[nextColorPointer];
		}
		currentColorPointer++;
		if (currentColorPointer == 5)
			currentColorPointer = 0;
		handler.postDelayed(this, 300); // 每300毫秒循环一次
	}
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		// 初始化views数组
		views = new View[] { findViewById(R.id.textview5),
				findViewById(R.id.textview4), findViewById(R.id.textview3),
				findViewById(R.id.textview2), findViewById(R.id.textview1) };
		handler = new Handler();
		handler.postDelayed(this, 300); // 每300毫秒循环一次
	}
}