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android中Viewpager自动加手动轮播

小伙伴们在使用App的时候有没有注意到很多App的首页都是可以左右滑动的页面呢？很多App还有绚丽的轮播图广告。那么如何实现这样的效果呢？这些功能可以用ViewPager来完成。别的内容不想多说，直接贴代码。。。

这里写代码片xml布局代码
       
    
   

这里写代码片viewitem布局代码
   
       
    
   

这里写代码片MyAdapter代码package com.example.cn.bgs.autoviewpagerdemo;import java.util.List;import android.content.Context;import android.support.v4.view.PagerAdapter;import android.view.View;import android.view.ViewGroup;import android.view.ViewParent;import android.widget.BaseAdapter;import android.widget.ImageView;public class MyAdapter extends PagerAdapter{
       private Context context;    private List
   
     Imglist;    public MyAdapter(List
    
      Imglist){        this.context=context;        this.Imglist=Imglist;    }    @Override    public int getCount() {        // TODO Auto-generated method stub        return Integer.MAX_VALUE;    }    @Override    public boolean isViewFromObject(View arg0, Object arg1) {        // TODO Auto-generated method stub        return arg0==arg1;    }    @Override    public Object instantiateItem(ViewGroup container, int position) {        // TODO Auto-generated method stub        int p=position%Imglist.size();        ImageView img=Imglist.get(p);        ViewParent parent=img.getParent();        if(parent!=null){            ViewGroup group=(ViewGroup) parent;            group.removeView(img);        }        container.addView(Imglist.get(p));        return Imglist.get(p);    }    @Override    public void destroyItem(ViewGroup container, int position, Object object) {    }}
    
   

这里写代码片MainActivity代码package com.example.cn.bgs.autoviewpagerdemo;import java.util.ArrayList;import java.util.List;import java.util.zip.Inflater;import android.os.Bundle;import android.os.Handler;import android.app.Activity;import android.support.v4.view.PagerAdapter;import android.support.v4.view.ViewPager;import android.support.v4.view.ViewPager.OnPageChangeListener;import android.view.Menu;import android.view.View;import android.widget.ImageView;public class MainActivity extends Activity {
       private ViewPager mVp;    private int imgs[] = { R.drawable.a, R.drawable.b, R.drawable.c,            R.drawable.d };    private boolean isAuto = true;// 是否自动轮播    private boolean isTouch = false;// 是否手动轮播    private List
   
     Imglist;    private int currentindex = 0;// 当前的状态    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        mVp = (ViewPager) findViewById(R.id.mVp);        initViewPager();// 初始化viewPager        t.start();// 启动线程    }    private void initViewPager() {        Imglist = new ArrayList
    
     ();        for (int i = 0; i < imgs.length; i++) {            View v = View.inflate(this, R.layout.viewitem, null);            ImageView img = (ImageView) v.findViewById(R.id.mImg);            img.setImageResource(imgs[i]);            Imglist.add(img);        }        MyAdapter adapter = new MyAdapter(Imglist);        mVp.setAdapter(adapter);        mVp.setOnPageChangeListener(new OnPageChangeListener() {            @Override            public void onPageSelected(int arg0) {                currentindex = arg0;            }            @Override            public void onPageScrolled(int arg0, float arg1, int arg2) {            }            @Override            public void onPageScrollStateChanged(int arg0) {                if (arg0 == ViewPager.SCROLL_STATE_IDLE) {                    isTouch = false;                } else {                    isTouch = true;                }            }        });    }    Thread t = new Thread(new Runnable() {        @Override        public void run() {            while (isAuto) {                try {                    t.sleep(3000);                    handler.sendEmptyMessage(0);                } catch (InterruptedException e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                }            }        }    });    private Handler handler = new Handler() {        public void handleMessage(android.os.Message msg) {            if (msg.what == 0) {                if (isTouch) {                    return;                }                currentindex++;                mVp.setCurrentItem(currentindex);            }        };    };    protected void onDestroy() {        super.onDestroy();        isAuto = false;    };}
    
   

代码到这里都写完了，我想你们都明白，就这样吧。。。。。。

至于效果图嘛如下：

我还不知道如何把效果展示给大家，代码反正是没问题，哪位大神能教教小弟我，感激不尽，，，，，，好了，别的不多说了，就是这样吧。。。。。。