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:    [email protected]
  *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>