ViewPager无限轮播+圆点+GridView数据展示

1.制作圆点Shape

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle" >

    <solid android:color="#ff0000" />

    
    <corners android:radius="10dip" />

</shape>

2.ViewPager+圆点+GridView的布局

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.zhoukao_lianxi_dome.MainActivity">
    <RelativeLayout
        android:id="@+id/rl"
        android:layout_width="match_parent"
        android:layout_height="200dp"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true">
        <android.support.v4.view.ViewPager
            android:id="@+id/vp"
            android:layout_width="match_parent"
            android:layout_height="200dp"
            />
        <LinearLayout
            android:id="@+id/ll"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:orientation="horizontal"
            android:layout_alignParentBottom="true"

            ></LinearLayout>
    </RelativeLayout>
<GridView
    android:id="@+id/gv"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:numColumns="3"
    android:layout_below="@+id/rl"
    ></GridView>

    

</RelativeLayout>

3.MainActivity代码

public class MainActivity extends AppCompatActivity {

    private ViewPager pager;
    private LinearLayout ll;
    private GridView gv;

    private Handler handler=new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            int what = msg.what;
            switch (what){
                case 0:
                    String json = (String) msg.obj;
                    parseData(json);
                    break;
                case 1:
                    //得到当前viewpager的索引
                    int currentItem = pager.getCurrentItem();
                    currentItem++;
                    //给viewpager设置当前的索引
                    pager.setCurrentItem(currentItem);
                    sendMsg();
                    break;
            }
        }
    };
    private List<Data.DataBean> list;
    private ArrayList<ImageView> ivlist;
    private ImageView iv;
    private PullToRefreshListView pu;
    private MyBaseAdapter adapter;
    private MyPagerAdapter viewadapter;



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        new Thread(){
            @Override
            public void run() {
                super.run();
                String json = NetWorkUtils.getJson();
                Message msg=new Message();
                msg.obj=json;
                msg.what=0;
                handler.sendMessage(msg);
            }
        }.start();

         //控件
        pager= (ViewPager) findViewById(vp);
        ll = (LinearLayout) findViewById(R.id.ll);
        gv = (GridView) findViewById(R.id.gv);

    }


    //解析字符串，得到数据
    private void parseData(String json) {
        Gson gson=new Gson();
        Data data = gson.fromJson(json, Data.class);
        list = data.getData();
        adapter = new MyBaseAdapter(list,MainActivity.this);
        gv.setAdapter(adapter);
        //把数据传给适配器
        viewadapter = new MyPagerAdapter(list,MainActivity.this);
        pager.setAdapter(viewadapter);
        //初始化点
        initDot();
        //让viewpager的索引默认的指在100000
        pager.setCurrentItem(100000);
        //自动轮播
        sendMsg();
        //viewPager滑动监听
        ViewPagerListener();
    }

    private void ViewPagerListener() {
        pager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

            }

            @Override
            public void onPageSelected(int position) {
                for(int i =0;i<ivlist.size();i++){
                    if(position%list.size()==i){
                        //点和图片事对应的
                        ivlist.get(position%list.size()).setImageResource(R.drawable.dot_focuable);
                    }else {
                        ivlist.get(i).setImageResource(R.drawable.dot_normal);
                    }
                }

            }

            @Override
            public void onPageScrollStateChanged(int state) {

            }
        });
    }

    //初始化点
    private void initDot() {
        ivlist = new ArrayList<>();
        if(ivlist!=null){
            ivlist.clear();
        }
        for (int i =0;i<list.size();i++){
            iv = new ImageView(MainActivity.this);
            if(i==0){
                //第一张，设置其远点为选中状态
                iv.setImageResource(R.drawable.dot_focuable);
            }else {
                //其他的都不选中
                iv.setImageResource(R.drawable.dot_normal);
            }
            LinearLayout.LayoutParams params=new LinearLayout.LayoutParams(20,20);
            //设置亮点之间的距离
            params.setMargins(10,0,10,0);
            ll.addView(iv,params);
            ivlist.add(iv);
        }
    }

    //实现 自动轮播
    private void sendMsg() {
        handler.sendEmptyMessageDelayed(1,2000);
    }
}
4.PagerAdapter
package com.example.zhoukao_lianxi_dome.adapter;

import android.content.Context;
import android.support.v4.view.PagerAdapter;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;

import com.example.zhoukao_lianxi_dome.bean.Data;
import com.nostra13.universalimageloader.core.ImageLoader;

import java.util.List;

/**
 * Created by z on 2017/9/14.
 */

public class MyPagerAdapter extends PagerAdapter{

    private List<Data.DataBean> list;
    private Context context;

    public MyPagerAdapter(List<Data.DataBean> list, Context context) {
        this.list = list;
        this.context = context;
    }

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

    @Override
    public boolean isViewFromObject(View view, Object object) {
        return view==object;
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        container.removeView((View) object);
    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        ImageView iv=new ImageView(context);
        //对图片进行缩放
        iv.setScaleType(ImageView.ScaleType.FIT_XY);
        ImageLoader.getInstance().displayImage(list.get(position%list.size()).getPic_url(),iv);
        container.addView(iv);

        return iv;
    }
}