android欢迎界面淡入淡出效果

主要代码如下：package com.myaibang.activity;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.os.CountDownTimer;import android.view.Window;import android.view.WindowManager;public class MainActivity extends Activity {/** Called when the activity is first created. */@Overridepublic 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.main);new CountDownTimer(2000,1000) {@Overridepublic void onTick(long millisUntilFinished) {}@Overridepublic void onFinish() {Intent intent = new Intent();intent.setClass(MainActivity.this, SecondActivity.class);startActivity(intent);int VERSION=Integer.parseInt(android.os.Build.VERSION.SDK);if(VERSION >= 5){MainActivity.this.overridePendingTransition(R.anim.alpha_in, R.anim.alpha_out);}finish();}}.start();}} 还需要两个xml文件，主要是对应淡入和淡出效果：<?xml version=”1.0″ encoding=”UTF-8″?><setxmlns:android=”http://schemas.android.com/apk/res/android”><alphaandroid:fromAlpha=”0.0″android:toAlpha=”1.0″android:duration=”2000″ /></set> <?xml version=”1.0″ encoding=”UTF-8″?><setxmlns:android=”http://schemas.android.com/apk/res/android”><alphaandroid:fromAlpha=”1.0″android:toAlpha=”0.0″android:duration=”2000″ /></set>
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