ViewPager网络图片无限轮播

  1 package com.bwei.admin.viewpagerdemo;
  2 
  3 import android.os.Bundle;
  4 import android.os.Handler;
  5 import android.os.Message;
  6 import android.support.v4.view.PagerAdapter;
  7 import android.support.v4.view.ViewPager;
  8 import android.support.v7.app.AppCompatActivity;
  9 import android.view.View;
 10 import android.view.ViewGroup;
 11 import android.widget.ImageView;
 12 
 13 import com.bumptech.glide.Glide;
 14 
 15 public class MainActivity extends AppCompatActivity implements View.OnClickListener{
 16 
 17     private ViewPager mViewPager;
 18  25     private String [] images={"http://l2.51fanli.net//tuan//images//1//5806eac956808.jpg",
 26             "http://l2.51fanli.net//tuan//images//b//580991bb30560.jpg",
 27             "http://l0.51fanli.net//tuan//images//b//58115f2593dc3.jpg",
 28             "http://l2.51fanli.net//tuan//images//0//57923840b054d.jpg",
 29             "http://l2.51fanli.net//tuan//images//e//58101e11ab164.jpg"};
 30     private ImageView[] mImageViews;
 31     private int index = 0;
 32     private Handler handler = new Handler(){
 33         @Override
 34         public void handleMessage(Message msg) {
 35             index = index%images.length;
 36             mViewPager.setCurrentItem(index,false);
 37             index++;
 38             index = index%images.length;
 39             //handler.sendEmptyMessageDelayed(index,2000);
 40             send();
 41 
 42         }
 43     };
 44     @Override
 45     protected void onCreate(Bundle savedInstanceState) {
 46         super.onCreate(savedInstanceState);
 47         setContentView(R.layout.activity_main);
 48 
 49         initView();
 50         mImageViews = new ImageView[5];
 51         mImageViews[0] = (ImageView) findViewById(R.id.point1);
 52         mImageViews[1] = (ImageView) findViewById(R.id.point2);
 53         mImageViews[2] = (ImageView) findViewById(R.id.point3);
 54         mImageViews[3] = (ImageView) findViewById(R.id.point4);
 55         mImageViews[4] = (ImageView) findViewById(R.id.point5);
 56 
 57         for (ImageView images: mImageViews) {
 58             images.setOnClickListener(this);
 59         }
 60         updateView(index);
 61         //handler.sendEmptyMessageDelayed(index,2000);
 62         send();
 63     }
 64 
 65     public void send(){
 66         new Thread(){
 67             @Override
 68             public void run() {
 69                 handler.sendEmptyMessageDelayed(index,2000);
 70             }
 71         }.start();
 72     }
 73 
 74     private void initView() {
 75         mViewPager = (ViewPager) findViewById(R.id.viewPager);
 76         MyPageAdapter adapter = new MyPageAdapter();
 77         mViewPager.setAdapter(adapter);
 78 
 79 
 80         mViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
 81             @Override
 82             public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 83 
 84             }
 85 
 86             @Override
 87             public void onPageSelected(int position) {
 88                     updateView(position);
 89             }
 90 
 91             @Override
 92             public void onPageScrollStateChanged(int state) {
 93 
 94             }
 95         });
 96     }
 97 
 98     //图片切换更新
 99     private void updateView(int position) {
100         //首先初始化成未选中的样子
101         for (ImageView images: mImageViews) {
102             images.setImageResource(R.drawable.nor);
103         }
104         //将选中的positon的更改为选中的样子
105         mImageViews[position].setImageResource(R.drawable.yer);
106     }
107 
108     @Override
109     public void onClick(View v) {
110         handler.removeCallbacksAndMessages(null);
111         int index1 = Integer.parseInt(v.getTag().toString());
112         mViewPager.setCurrentItem(index1,false);
113         index = index1+1;
114         send();
115     }
116 
117     class MyPageAdapter extends PagerAdapter{
118 
119         @Override
120         public int getCount() {
121             return images.length;
122         }
123 
124         @Override
125         public boolean isViewFromObject(View view, Object object) {
126             return view==object;
127         }
128 
129         @Override
130         public Object instantiateItem(ViewGroup container, int position) {
131             ImageView imageView = new ImageView(MainActivity.this);
132            // imageView.setImageResource(imageId[position%imageId.length]);
133             Glide.with(MainActivity.this).load(images[position]).placeholder(R.drawable.yer).into(imageView);
134             container.addView(imageView);
135             return imageView;
136         }
137 
138         @Override
139         public void destroyItem(ViewGroup container, int position, Object object) {
140             //super.destroyItem(container, position, object);
141             container.removeView((View)object);
142         }
143     }
144 
145 }