欢迎界面

1. 清单文件中先加载 欢迎页面 （WecomeActivity）在加载MainActivity
   ···
   public class WecomeActivity extends Activity {
   ImageView imageView ;
   @Override
   protected void onCreate(Bundle savedInstanceState) {

      //设置为无标题栏
        /**标题是属于View的，所以窗口所有的修饰部分被隐藏后标题依然有效,需要去掉标题**/
        requestWindowFeature(Window.FEATURE_NO_TITLE);
      //设置为全屏模式
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
        WindowManager.LayoutParams.FLAG_FULLSCREEN);
        super.onCreate(savedInstanceState);
       //加载布局文件
         setContentView(R.layout.activity_wecome);
       
        handler.sendEmptyMessageDelayed(0,3000);
      //主要用来发送延迟消息
        
    }
    
    //首先新建一个消息处理对象，负责发送与处理消息
    private Handler handler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            getHome();
            super.handleMessage(msg);
        }
    };
    public void getHome(){
        //意图
        Intent intent = new Intent(WecomeActivity.this, MainActivity.class);
       //启动Activity
        startActivity(intent);
        //关闭
        finish();
    }
   

}
···
2.里面开启转向的MainActiivty
3.在MainActiivty中用定时器转向 主页面（SecondActivity）
···
public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
        trun();
        finish();
}
private void trun() {
    //你要转向的Activity
    final   Intent intent=  new Intent(MainActivity.this,SecondActivity.class);
    Timer timer = new Timer();
    TimerTask task = new TimerTask() {//定时器
        
        @Override
        public void run() {
            startActivity(intent);
        }
    };
    timer.schedule(task, 100);//两秒后
    
}

}
···
方式二：
通过引导页进入App

1. 第一次运行通过3秒跳转到ViewPage 引导页，点击图片跳转到主页面

2. 安装完成后，在运行 3秒延迟后直接跳转到主页面
   一 1. 首先创建一个项目，准备三个Fragment 加载到第二个页面的Activity中
   ---------------------代码如下---------------------
   ···
   public class SecondActivity extends FragmentActivity {
   ArrayList list= new ArrayList();
   ViewPager vp;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.activity_second);
   init();
   }

   private void init() {
   vp=(ViewPager) findViewById(R.id.vp_second);
   list.add(new Fist());
   list.add(new Second());
   list.add(new Three());
   vp.setAdapter(new MyAdapter(getSupportFragmentManager()));
   }
   class MyAdapter extends FragmentPagerAdapter{

    public MyAdapter(FragmentManager fm) {
        super(fm);
        // TODO Auto-generated constructor stub
    }
   
    @Override
    public Fragment getItem(int arg0) {
        // TODO Auto-generated method stub
        return list.get(arg0);
    }
   
    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return list.size();
    }
   

   }
   }

···
-------------------- --xml-文件
···
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="{relativePackage}.{activityClass}" >
android:id="@+id/vp_second"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:orientation="vertical" >

···
在第三个Fragment中 有一个点击事件

···
public class Three extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.three, null);
view.findViewById(R.id.imageView1).setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
         startActivity(new Intent(getActivity(),ThreeActivity.class));
            }
        });
        return view;
       }

}
···
*******************MainActivity 中*****
···
package com.example.anqt;

import java.util.Timer;
import java.util.TimerTask;

import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;

public class MainActivity extends Activity {

private SharedPreferences sp;
SharedPreferences.Editor edit;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    sp = getSharedPreferences("second", MODE_PRIVATE);
    edit = sp.edit();
    sp.getBoolean("aa", false);
    if (sp.getBoolean("aa", true)) {
        new Thread(){
            @Override
            public void run() {
                edit.putBoolean("aa", false);
                edit.commit();
                final Intent intent=  new Intent(MainActivity.this,SecondActivity.class);
                Timer timer = new Timer();
                TimerTask task = new TimerTask() {
                    @Override
                    public void run() {
                        startActivity(intent);
                    }
                };
                timer.schedule(task, 3000);
            
            }
        }.start();
    }else{
        final Intent intent=  new Intent(MainActivity.this,ThreeActivity.class);
        Timer timer = new Timer();
        TimerTask task = new TimerTask() {
            @Override
            public void run() {
                startActivity(intent);
            }
        };
        timer.schedule(task, 3000);
     
    }
}

}

···