Android启动画面实现

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<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".SplashActivity" >

<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/welcome_android"
android:scaleType="fitCenter" />

</RelativeLayout>

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package cn.eoe.leigo.splash;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;

/**
*
* @{#} SplashActivity.java Create on 2013-5-2 下午9:10:01
*
* class desc:   启动画面
*
* <p>Copyright: Copyright(c) 2013 </p>
* @Version 1.0
* @Author <a href="mailto:gaolei_xj@163.com">Leo</a>
*
*
*/
public class SplashActivity extends Activity {

//延迟3秒
private static final long SPLASH_DELAY_MILLIS = 3000;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.splash);

// 使用Handler的postDelayed方法，3秒后执行跳转到MainActivity
new Handler().postDelayed(new Runnable() {
public void run() {
goHome();
}
}, SPLASH_DELAY_MILLIS);
}

private void goHome() {
Intent intent = new Intent(SplashActivity.this, MainActivity.class);
SplashActivity.this.startActivity(intent);
SplashActivity.this.finish();
}
}

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<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="cn.eoe.leigo.splash"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
android:minSdkVersion="10"
android:targetSdkVersion="10" />

<application
android:icon="@drawable/logo"
android:label="@string/app_name" >
<activity
android:name=".SplashActivity"
android:configChanges="keyboardHidden"
android:label="@string/app_name"
android:launchMode="singleTask"
android:screenOrientation="portrait"
android:theme="@android:style/Theme.NoTitleBar.Fullscreen" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".MainActivity" />
</application>

</manifest>