android兑现淡入淡出欢迎界面

android实现淡入淡出欢迎界面
本例子会实现想手机QQ和酷狗那样的淡入淡出的欢迎界面

import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.os.CountDownTimer;import android.view.Window;import android.view.WindowManager;import com.dapp.R;public class Welcome extends Activity{	@Override	protected void onCreate(Bundle savedInstanceState) {		requestWindowFeature(Window.FEATURE_NO_TITLE);		getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 				WindowManager.LayoutParams.FLAG_FULLSCREEN);		super.onCreate(savedInstanceState);		setContentView(R.layout.welcome);				new CountDownTimer(2000,1000) {						@Override			public void onTick(long millisUntilFinished) {			}			@Override			public void onFinish() {				Intent intent = new Intent();				intent.setClass(Welcome.this, MainGroup.class);				startActivity(intent);								int VERSION=Integer.parseInt(android.os.Build.VERSION.SDK);				if(VERSION >= 5){					Welcome.this.overridePendingTransition(R.anim.alpha_in, R.anim.alpha_out);				}				finish();			}		}.start();	}}

淡入XML代码清单：

<?xml version="1.0" encoding="UTF-8"?><set	xmlns:android="http://schemas.android.com/apk/res/android">	<alpha		android:fromAlpha="0.0"		android:toAlpha="1.0"		android:duration="2000" /></set>

淡出XML代码清单：

<?xml version="1.0" encoding="UTF-8"?><set	xmlns:android="http://schemas.android.com/apk/res/android">	<alpha		android:fromAlpha="1.0"		android:toAlpha="0.0"		android:duration="2000" /></set>

这样就会轻松实现淡入淡出的欢迎界面喽，原创http://fuchangle.iteye.com