获取json解析 图片,文字+MyAsyncTask+ImagerLoader

//联网权限
<uses-permission android:name="android.permission.INTERNET"></uses-permission>

//jsonBean 我已删除get.set方法,减少代码量
public class JsonBean {
/**
* code : 200
* msg : success
* newslist :

*/
private int code;
private String msg;
private List<NewslistBean> newslist;

public static class NewslistBean {
/**
* ctime : 2017-09-04
* description : 娱乐圈那点事
* picUrl : https://zxpic.gtimg.com/infonew/0/wechat_pics_-28232099.static/640 * title : 林志玲休息室被拍画面“辣眼睛”，这才是她嫁不出去的原因吧！
* url :
*/

private String ctime;
private String description;
private String picUrl;
private String title;
private String url;

}
}

//activity.xml

<Button
android:id="@+id/but1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="HttpClient请求"/>
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/lv1">
</ListView>

//item  listview中每一份

<ImageView
android:id="@+id/iv3"
android:layout_width="100dp"
android:layout_height="100dp"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="100dp"
android:orientation="vertical">
<TextView
android:layout_marginTop="20dp"
android:id="@+id/tv1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="748654651548948641515"/>
<TextView
android:layout_marginTop="20dp"
android:id="@+id/tv2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="748654651548641515"/>
</LinearLayout>

//MyAppliction.java  解图片

在 AndroidManifest.xml        中的           <application          后加       android:name=".MyAppliction"

public class MyAppliction extends Application{
@Override
public void onCreate() {
super.onCreate();
ImageLoaderConfiguration buildsw = new ImageLoaderConfiguration.Builder(MyAppliction.this).build();
ImageLoader.getInstance().init(buildsw);

}
}

MainActivity.java  

import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import com.google.gson.Gson;
import com.nostra13.universalimageloader.core.ImageLoader;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.List;

public class MainActivity extends AppCompatActivity {

String path="https://api.tianapi.com/wxnew/?key=8d6e3228d25298f13af4fc40ce6c9679&num=10";
private Button but1;
private Button but2;
private ListView lv1;
//private Bitmap bitmap;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
but1 = (Button) findViewById(R.id.but1);

lv1 = (ListView) findViewById(R.id.lv1);
but1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
new MyAsyncTask().execute(path);

}
});
}
class MyAsyncTask extends AsyncTask<String,Void,String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
}

@Override
protected void onPostExecute(String s)
4000
{
super.onPostExecute(s);
// 导包gson
 Gson gson = new Gson();

JsonBean jsonBean = gson.fromJson(s, JsonBean.class);
final List<JsonBean.NewslistBean> newslist = jsonBean.getNewslist();
lv1.setAdapter(new BaseAdapter() {
@Override
public int getCount() {
return newslist.size();
}

@Override
public Object getItem(int position) {
return newslist.get(position);
}

@Override
public long getItemId(int position) {
return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHand viewHand;
if (convertView==null){
viewHand = new ViewHand();
convertView=View.inflate(MainActivity.this,R.layout.item1,null);
viewHand.tv1= (TextView) convertView.findViewById(R.id.tv1);
viewHand.tv2= (TextView) convertView.findViewById(R.id.tv2);
viewHand.iv = (ImageView) convertView.findViewById(R.id.iv3);
convertView.setTag(viewHand);
}else {
viewHand= (ViewHand) convertView.getTag();
}
viewHand.tv1.setText(newslist.get(position).getTitle());
viewHand.tv2.setText(newslist.get(position).getCtime());
//导包ImageLoader
 ImageLoader.getInstance().displayImage(newslist.get(position).getPicUrl(),viewHand.iv);

return convertView;
}
class ViewHand{
TextView tv1;
TextView tv2;
ImageView iv;
}
});

}

@Override
protected void onProgressUpdate(Void... values) {
super.onProgressUpdate(values);
}

@Override
protected String doInBackground(String... params) {
ByteArrayOutputStream outputStream;
try {
URL url = new URL(params[0]);
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.setConnectTimeout(5000);
int responseCode = urlConnection.getResponseCode();
outputStream = new ByteArrayOutputStream();
if (responseCode==200){
InputStream inputStream = urlConnection.getInputStream();
byte[] bytes = new byte[1024];
int i;
while ((i=inputStream.read(bytes))!=-1){
outputStream.write(bytes,0,i);
}
return outputStream.toString();
}

} catch (Exception e) {
e.printStackTrace();
}
return null;

}
}

}