AsyncTask+HttpClient网络请求图片实现自动轮播+小圆点

//主布局
<?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/viewpager"
android:layout_width="fill_parent"
android:layout_height="fill_parent"></android.support.v4.view.ViewPager>
<LinearLayout
android:id="@+id/ll_layout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="500dp"
android:layout_centerHorizontal="true"
android:orientation="horizontal">
</LinearLayout>
</RelativeLayout>

//子布局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ImageView
android:id="@+id/iv_image"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:state_enabled="true" android:drawable="@drawable/true_123"></item>
<item android:state_enabled="false" android:drawable="@drawable/false_"></item>

</selector>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval">
<size android:width="5dp" android:height="5dp"/>
<solid android:color="#000000"/>
</shape>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval">
<size android:width="5dp" android:height="5dp"/>
<solid android:color="#808080"/>
</shape>

//代码块
package com.example.cart;

import java.io.IOException;
import java.util.List;
import java.util.concurrent.ExecutionException;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.StatusLine;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;

import com.example.adapter.MyAdapter;
import com.example.bean.Good;
import com.example.bean.Goods;
import com.example.bean.ImageUrl;
import com.example.bean.Show_Good;
import com.example.bean.Show_GoodAll;
import com.example.bean.Show_Goods;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;

import android.app.Activity;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.LinearLayout.LayoutParams;

public class ShowActivity extends Activity{
private String url="http://mobile.hmeili.com/yunifang/mobile/goods/detail?id=";
private String id;
private ViewPager viewpager;
private ImageView iv_image;
private int lastindex;
private LinearLayout ll_layout;
List<ImageUrl> imageurl;
private Handler handler = new Handler() {
public void handleMessage(android.os.Message msg) {
if (msg.what == 100){
int currentItem = viewpager.getCurrentItem();
currentItem++;
viewpager.setCurrentItem(currentItem);
play();
}
};
};

@Override
protected void onCreate(Bundle savedInstanceState){
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.showactivity);
viewpager=(ViewPager) findViewById(R.id.viewpager);
//接收值
Intent intent=getIntent();
id=intent.getStringExtra("id");
MyAsyncTask myAsyncTask = new MyAsyncTask();
try {
String s = myAsyncTask.execute(url + id).get();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ExecutionException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

class MyAsyncTask extends AsyncTask<String, Integer, String> {
@Override
protected String doInBackground(String... params) {
// 取参数列表,数组角标为0的参数,也就是myAsyncTask.execute传递的参数
String string = params[0];
HttpClient httpClient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet(string);
String s = null;
try {
HttpResponse httpResponse = httpClient.execute(httpGet);
StatusLine statusLine = httpResponse.getStatusLine();
int statusCode = statusLine.getStatusCode();
if (statusCode == 200){
HttpEntity entity = httpResponse.getEntity();
s = EntityUtils.toString(entity);
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return s;
}

// 运行在主线程,在doInBackground方法执行之后执行,并且接收doInBackground方法的返回值
@Override
protected void onPostExecute(String result){
super.onPostExecute(result);
// 使用Gson解析
Gson gson = new Gson();
Show_GoodAll goodsall=gson.fromJson(result,Show_GoodAll.class);
String goods_desc=goodsall.getData().getGoods().getGoods_desc();
Log.i("goods_desc", goods_desc);
Gson gson1=new Gson();
imageurl=gson1.fromJson(goods_desc, new TypeToken<List<ImageUrl>>(){}.getType());
Log.i("imageurl", imageurl.toString());
viewpager.setAdapter(new PagerAdapter() {

@Override
public boolean isViewFromObject(View arg0, Object arg1) {
return arg0 == arg1;
}
@Override
public int getCount() {
return Integer.MAX_VALUE;
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
// 转成View对象
View view = View.inflate(ShowActivity.this,R.layout.view, null);
// 找对象
iv_image = (ImageView) view.findViewById(R.id.iv_image);
// 赋值
ImageLoader instance = ImageLoader.getInstance();
instance.init(ImageLoaderConfiguration
.createDefault(ShowActivity.this));
instance.displayImage(imageurl.get((position)%imageurl.size()).getUrl(), iv_image);
container.addView(view);
return view;
}

@Override
public void destroyItem(ViewGroup container, int position,
Object object) {
container.removeView((View) object);
}
});
viewpager.setCurrentItem(imageurl.size() * 10000);
play();
ll_layout = (LinearLayout) findViewById(R.id.ll_layout);
for (int i = 0; i < imageurl.size(); i++) {
// 创建指示点
ImageView imageView = new ImageView(ShowActivity.this);
// 设置指示点的背景
imageView.setBackgroundResource(R.drawable.select);
// 得到布局设置参数的对象,该对象的类型取决于当前view的父view
LayoutParams layoutParams = new LayoutParams(
LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
// 设置指示点的间距,当前设置的是到左边控件的距离
layoutParams.leftMargin = 15;
// 给指示点设置参数
imageView.setLayoutParams(layoutParams);
// 把imageView装进linearLayout布局中
ll_layout.addView(imageView);
// 设置指示点的初始状态,当指示点是第一个的时候,设置成选中状态,其余的都是不选中
if (i == 0) {
imageView.setEnabled(true);
} else {
imageView.setEnabled(false);
}
}
//设置监听
viewpager.setOnPageChangeListener(new OnPageChangeListener(){
@Override
public void onPageSelected(int position) {
int index = position % imageurl.size();
// 通过角标,得到linearLayout的子控件,设置当前指示点的选择状态
ll_layout.getChildAt(index).setEnabled(true);
// 设置上一个指示点的选择状态
ll_layout.getChildAt(lastindex).setEnabled(false);
// 记录上一个角标位置
lastindex = index;
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {

}
@Override
public void onPageScrollStateChanged(int arg0) {

}
});

}
}

private void play(){
handler.sendEmptyMessageDelayed(100, 1000);
}

}