Android应用程序显示欢迎画面并开机自启动

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http://www.cnblogs.com/lcyty/archive/2013/04/02/2996541.html

放到新注册的Activity下，使其首先启动。

Activity的代码如下：

import android.annotation.SuppressLint;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.view.Window;//欢迎界面@SuppressLint("HandlerLeak")public class WelcomeActivity extends Activity{        private static final String S = "MainActivity";    @Override    protected void onCreate(Bundle savedInstanceState) {        // TODO Auto-generated method stub        super.onCreate(savedInstanceState);        requestWindowFeature(Window.FEATURE_NO_TITLE);//去掉标题栏                setContentView(R.layout.welcome);        //启动线程        Thread mt = new Thread(mThread);        mt.start();    }        private Handler mHandler = new Handler(){                @Override        public void handleMessage(Message msg) {            // TODO Auto-generated method stub            super.handleMessage(msg);            if((String)msg.obj == S) {                //跳转                Intent intent = new Intent();                intent.setClass(WelcomeActivity.this, MainActivity.class);                WelcomeActivity.this.startActivity(intent);                 finish();            }        }    };        Runnable mThread = new Runnable() {        @Override        public void run() {            // TODO Auto-generated method stub            Message msg = mHandler.obtainMessage();            //延时3秒            try {                Thread.sleep(3000);            } catch (InterruptedException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }            msg.obj = S;            mHandler.sendMessage(msg);        }            };}

首先使窗口全屏，显示画面，然后打开一个线程，在线程中延时3秒发送一个消息，在消息处理中跳转到Mainctivity并且关闭WelcomeActivity。这样就实现了开机欢迎画面出现3秒的效果。

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