安卓入门：启动界面制作_制作一个android操作系统介绍界面代码

<?xml version="1.0"  encoding="UTF-8"?>
<LinearLayout
     android:id="@+id/loginRoot"
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="fill_parent"
     android:layout_height="fill_parent"
     android:orientation="vertical"
     android:background="@drawable/welcome">
    
    
</LinearLayout>

package com.example.uidesgin;
 
import android.app.Activity;
import android.app.Dialog;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.view.Window;
 
public class ActSplashScreen extends Activity {
 
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		// 去掉标题
		requestWindowFeature(Window.FEATURE_NO_TITLE);
		setContentView(R.layout.actsplashscreen);
		// 闪屏核心代码
		new Handler().postDelayed(new Runnable() {
 
			@Override
			public void run() {
				// TODO Auto-generated method stub
				Intent intent = new Intent(ActSplashScreen.this,
						MainActivity.class);
				// 从启动动画切换到主界面
				startActivity(intent);
				ActSplashScreen.this.finish();// 结束动画
			}
		}, 3000);
	}
 
}

<activity
            android:name="com.example.uidesgin.ActSplashScreen"
            android:configChanges="orientation|keyboardHidden|screenSize"
            android:label="@string/app_name"
            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>