android欢迎界面的编程实现[手相评分软件实例]

首先，我们可以先看一下“手相评分”这款软件的启动画面。如下：

其实，做欢迎界面的原理非常简单，就是在onCreate函数中启动一个线程，线程体在睡眠几秒钟之后，跳转
到MainActivity即可。具体实现代码如下：
WelcomeActivity.java

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.Window;
import android.view.WindowManager;
/*
 *@author: ZhengHaibo  
 *web:     http://blog.csdn.net/nuptboyzhb
 *mail:    zhb931706659@126.com
 *2013-3-25  Nanjing,njupt,China
 */
public class WelcomeActivity extends Activity {
	private static final int GOTO_MAIN_ACTIVITY = 0;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		// 设置无标题
		requestWindowFeature(Window.FEATURE_NO_TITLE);
		// 设置全屏
		getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
				WindowManager.LayoutParams.FLAG_FULLSCREEN);
		setContentView(R.layout.activity_welcome);
		MyTimer timer = new MyTimer();
		timer.start();//启动线程
	}

	Handler mHandler = new Handler() {
		public void handleMessage(Message msg) {

			switch (msg.what) {
			case GOTO_MAIN_ACTIVITY:
				Intent intent = new Intent();
				intent.setClass(WelcomeActivity.this, SystemMain.class);
				startActivity(intent);
				finish();
				break;
			default:
				break;
			}
		};
	};

	public class MyTimer extends Thread {
		public MyTimer() {
			// TODO Auto-generated constructor stub
		}
		@Override
		public void run() {
			// TODO Auto-generated method stub
			try {
				Thread.sleep(3000);// 线程暂停时间，单位毫秒
				mHandler.sendEmptyMessage(GOTO_MAIN_ACTIVITY);
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}
}

布局代码activity_welcome.xml

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

对了，广告一下， 手相评分即是本人开发，多谢大家支持！以后会写该软件图像处理方面的实现方法，敬请期待！