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    package com.baway.test;

    import java.io.BufferedReader;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.InputStreamReader;
    import java.net.HttpURLConnection;
    import java.net.MalformedURLException;
    import java.net.ProtocolException;
    import java.net.URL;
    import java.util.ArrayList;
    import java.util.List;
    import java.util.Timer;
    import java.util.TimerTask;

    import android.app.Activity;
    import android.content.Intent;
    import android.os.Bundle;
    import android.os.Handler;
    import android.support.v4.view.PagerAdapter;
    import android.support.v4.view.ViewPager;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.ImageView;
    import android.widget.ImageView.ScaleType;
    import android.widget.LinearLayout;

    import com.baway.bean.Conn;
    import com.baway.bean.Data;
    import com.baway.bean.Like_user_list;
    import com.google.gson.Gson;
    import com.lidroid.xutils.BitmapUtils;

    public class IndexActivity extends Activity {

    private Intent in;
    private int p;
    private String uri="http://mbfun.funwear.com/mbfun_server/index.php?m=Home&a=getCollocationListHot&page=1";
    private String s;
    private InputStream ins;
    private List<Data> data;
    private ArrayList<Like_user_list> list;
    private ViewPager vp;
    private LinearLayout dotcontaint;
    ArrayList<ImageView> imgs ;
    ArrayList<View> dots ;

    int currentIndex = 0;
    int olderIndex = 0;
    Handler h = new Handler(){
    public void handleMessage(android.os.Message msg) {
    vp.setCurrentItem(currentIndex);//设置此次要显示的pager
    //切换选中的圆点
    dots.get(olderIndex).setBackgroundResource(R.drawable.dot_nomal);//设置上次选中的圆点为不选中
    dots.get(currentIndex%list.size()).setBackgroundResource(R.drawable.dot_focus);//设置当前选中的圆点为选中
    olderIndex = currentIndex%list.size();

    };
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_index);
    vp = (ViewPager) findViewById(R.id.vp);
    dotcontaint = (LinearLayout) findViewById(R.id.dotcontaint);

    in=getIntent();
    p=in.getIntExtra("p",100);
    s=in.getStringExtra("s");
    init1();


    init();
    }
    private void init1() {
    Gson g=new Gson();
    Conn c=g.fromJson(s,Conn.class);
    data=c.getData();
    list=data.get(p).getLike_user_list();
    }

    public void init(){


    //获得网络图片,配置给Veiwpager
    getImageViewList();
    //获得圆点
    getDotList();
    //设置第一个圆点为选中状态
    dots.get(0).setBackgroundResource(R.drawable.dot_focus);
    vp.setAdapter(new MyVpAdapger());//配置pager页
    int currentItem = Integer.MAX_VALUE/2-Integer.MAX_VALUE/2%list.size();
    vp.setCurrentItem(currentItem);
    //通过定时器,制作自动划动效果
    Timer timer = new Timer();
    timer.schedule(new TimerTask() {
    @Override
    public void run() {
    currentIndex = vp.getCurrentItem()+1;//下一个页

    h.sendEmptyMessage(0x123);//在此线程中,不能操作ui主线程
    }
    }, 3000, 2000);

    }

    private void getDotList() {
    dots = new ArrayList<View>();
    //循环图片数组,创建对应数量的dot
    for(int i=0;i<list.size();i++){
    View view = LayoutInflater.from(this).inflate(R.layout.dot_layout, null);//加载布局
    View dot = view.findViewById(R.id.dotView);//得到布局中的dot点组件
    //收集dot
    dots.add(dot);
    //把布局添加到线性布局
    dotcontaint.addView(view);
    }

    }

    class MyVpAdapger extends PagerAdapter{

    @Override
    public int getCount() {
    return Integer.MAX_VALUE;
    }

    @Override
    public boolean isViewFromObject(View arg0, Object arg1) {
    return arg0==arg1;
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
    // super.destroyItem(container, position, object);
    // ImageView img = imgs.get(position);
    container.removeView((View)object);
    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {
    int item = position%list.size();
    container.addView(imgs.get(item));
    return imgs.get(item);
    }

    }

    /**
    * 到网络获得图片信息,并赋值到ImageView中
    */
    private void getImageViewList() {
    imgs = new ArrayList<ImageView>();
    BitmapUtils btUtil = new BitmapUtils(this);
    //加载图片
    for(int i=0;i<list.size();i++){
    ImageView img = new ImageView(this);
    img.setScaleType(ScaleType.FIT_XY);

    btUtil.display(img,list.get(i).getHead_img());
    imgs.add(img);
    }
    }


    }

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  • 原文地址:https://www.cnblogs.com/hnpy/p/5552145.html
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