ViewPager图片无限自动轮播

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">

<android.support.v4.view.ViewPager
android:id="@+id/vp"
android:layout_width="match_parent"
android:layout_height="300dp"></android.support.v4.view.ViewPager>
<LinearLayout
android:orientation="horizontal"
android:layout_alignBottom="@id/vp"
android:layout_marginBottom="10dp"
android:gravity="center"
android:id="@+id/liear"
android:layout_width="match_parent"
android:layout_height="20dp"></LinearLayout>
</RelativeLayout>

package xixinxin.bawie.com.item1.activity;

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 android.widget.LinearLayout;

import com.google.gson.Gson;

import org.xutils.common.Callback;
import org.xutils.http.RequestParams;
import org.xutils.x;

import java.util.List;

import xixinxin.bawie.com.item1.R;
import xixinxin.bawie.com.item1.bean.User;

public class MainActivity extends AppCompatActivity {

private ViewPager vp;
private LinearLayout liear;
private List<User.ResultBean.AdvsBean> advs;
private ImageView imageView;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//初始化注解
x.view().inject(this);
//找控件
intiView();
//获取网络数据
getServiceData();
}

private void getServiceData() {
String url = "http://www.babybuy100.com/API/getShopOverview.ashx";
RequestParams params = new RequestParams(url);
x.http().get(params, new Callback.CacheCallback<String>() {
private String result = null;

@Override
public boolean onCache(String result) {
this.result = result;
return false;
}

@Override
public void onSuccess(String result) {
if (result != null) {
this.result = result;
}
getData(result);
}

@Override
public void onError(Throwable ex, boolean isOnCallback) {

}

@Override
public void onCancelled(CancelledException cex) {

}

@Override
public void onFinished() {

}
});
}

private void getData(String result) {
Gson gson = new Gson();
User user = gson.fromJson(result, User.class);
advs = user.getResult().getAdvs();
vp.setAdapter(new MyAdapter());
//创建小圆点
initPoint();
vp.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

}

@Override
public void onPageSelected(int position) {
//获取小圆点数据
int childCount = liear.getChildCount();
for (int i = 0; i < childCount; i++) {
View childAt = liear.getChildAt(i);
//页面改变时切换小圆点
childAt.setEnabled(i == position % (advs.size()) ? false : true);
}
}

@Override
public void onPageScrollStateChanged(int state) {

}
});
}

private void initPoint() {
for (int i = 0; i < advs.size(); i++) {
//创建小圆点控件
View view = new View(this);
//设置 背景选择器
view.setBackgroundResource(R.drawable.selector);
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(20, 20);
//创建小圆点间距
params.rightMargin = 10;
//把小圆点添加到容器
liear.addView(view, params);
view.setTag(i);
}
View view = liear.getChildAt(0);
view.setEnabled(false);
}

private Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
if (msg.what == 0) {
int current = (int) msg.obj;
vp.setCurrentItem(current + 1);
}
}
};

public void startSwitch() {
new Thread() {
@Override
public void run() {
while (true) {
int item = vp.getCurrentItem();
Message msg = Message.obtain();
msg.what = 0;
msg.obj = item;
handler.sendMessageDelayed(msg, 2000);
}
}
}.start();
}

public void stopSwitch() {
handler.removeCallbacksAndMessages(null);
}

public class MyAdapter extends PagerAdapter {

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

@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);
x.image().bind(imageView, advs.get(position % advs.size()).getPic());
container.addView(imageView);
return imageView;
}

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

private void intiView() {
vp = (ViewPager) findViewById(R.id.vp);
liear = (LinearLayout) findViewById(R.id.liear);
}

@Override
protected void onStart() {
super.onStart();
startSwitch();
}

@Override
protected void onStop() {
super.onStop();
stopSwitch();
}
}