Android闪屏效果实现方法

package com.mstar;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
public class ActSplashScreen extends Activity{
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.shan);
 // 闪屏的核心代码
 new Handler().postDelayed(new Runnable() {
  @Override
  public void run() {
  Intent intent = new Intent(ActSplashScreen.this,DialogTest.class);
  //从启动动画ui跳转到主ui
  startActivity(intent);
  ActSplashScreen.this.finish(); // 结束启动动画界面
  }
 }, 3000); //启动动画持续3秒钟
 }
}

<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  >
  <TextView
   android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:text="闪一下"
  >
  </TextView>
</LinearLayout>