ViewPager无限轮播（网络图片

ViewPager无限轮播（网络图片）

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.support.v4.view.PagerAdapter;

import android.support.v4.view.ViewPager;

import android.support.v7.app.AppCompatActivity;

import android.view.View;

import android.view.ViewGroup;

import android.widget.ImageView;

import com.bumptech.glide.Glide;

public class MainActivity extends AppCompatActivity implements View.OnClickListener{

private String [] images={"http://l2.51fanli.net//tuan//images//1//5806eac956808.jpg",
"http://l2.51fanli.net//tuan//images//b//580991bb30560.jpg",
"http://l0.51fanli.net//tuan//images//b//58115f2593dc3.jpg",
"http://l2.51fanli.net//tuan//images//0//57923840b054d.jpg",
"http://l2.51fanli.net//tuan//images//e//58101e11ab164.jpg"};
private ImageView[] points;
private ViewPager mViewPager;
private ImagesAdapter adapter;
private int indexPoint = 0;
private Handler mHandler=new Handler(){
@Override
public void handleMessage(Message msg) {
mViewPager.setCurrentItem(indexPoint);
indexPoint++;
indexPoint=indexPoint%images.length;

send();
}

};

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

points=new ImageView[5];
points[0]=(ImageView)findViewById(R.id.point1);
points[1]=(ImageView)findViewById(R.id.point2);
points[2]=(ImageView)findViewById(R.id.point3);
points[3]=(ImageView)findViewById(R.id.point4);
points[4]=(ImageView)findViewById(R.id.point5);
for (ImageView img : points) {
img.setOnClickListener(this);
}
updatePoint(indexPoint);
send();

}
//先把所有点初始化原来的样式
private void updatePoint(int position) {
for (ImageView img : points) {
img.setImageResource(R.drawable.nor);
}
points[position].setImageResource(R.drawable.sel);
}

@Override
public void onClick(View v) {
mHandler.removeCallbacksAndMessages(null);
int index = Integer.valueOf(v.getTag().toString());
mViewPager.setCurrentItem(index,false);
indexPoint=index+1;
send();

}
public void send(){
new Thread(){
@Override
public void run() {
mHandler.sendEmptyMessageDelayed(indexPoint,2000);
}
}.start();
}
private void initView() {
mViewPager=(ViewPager)findViewById(R.id.viewpager);
adapter = new ImagesAdapter();
mViewPager.setAdapter(adapter);
mViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

}

@Override
public void onPageSelected(int position) {
updatePoint(position);
}

@Override
public void onPageScrollStateChanged(int state) {

}
});
}

class ImagesAdapter extends PagerAdapter{

@Override
public int getCount() {
return images.length;
}

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

@Override
public Object instantiateItem(ViewGroup container, int position) {
ImageView imageView = new ImageView(MainActivity.this);
Glide.with(MainActivity.this).
load(images[position]).
placeholder(R.drawable.nor).
into(imageView);
container.addView(imageView);

return imageView;
}

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

}

@Override
protected void onDestroy() {
super.onDestroy();
mHandler.removeCallbacksAndMessages(null);
}

}