AsyncTask

package com.example.util;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

import android.os.AsyncTask;

public class Util extends AsyncTask<String, Void, String>{

	private String json;

	@Override
	protected String doInBackground(String... params) {
		try {
			URL url=new URL(params[0]);
		HttpURLConnection connection=(HttpURLConnection) url.openConnection();
		if(connection.getResponseCode()==200){
			InputStream is = connection.getInputStream();
			byte[] by=new byte[1024];
			int len;
			ByteArrayOutputStream os=new ByteArrayOutputStream();
			while((len=is.read(by))!=-1){
				os.write(by, 0, len);
			}
			json = os.toString("gbk");
			return json;
		}
		} catch (MalformedURLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return null;
	}

}

 

import java.util.List;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;

import com.example.adapter.Adapter;
import com.example.bean.Bean;
import com.example.bean.Bean.Data;
import com.example.util.Util;
import com.google.gson.Gson;

public class SecActivity extends Activity {

	private ListView lv;
	private List<Data> da;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_sec);
		lv = (ListView) findViewById(R.id.listView1);
		get();
		lv.setOnItemClickListener(new OnItemClickListener() {

			@Override
			public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
					long arg3) {
				Intent intent = new Intent(SecActivity.this, ThreActivity.class);
				intent.putExtra("source", da.get(arg2).source);
				intent.putExtra("dis", da.get(arg2).display_url);
				startActivity(intent);
			}
		});
	}

	public void get() {
		String path = "http://ic.snssdk.com/2/article/v25/stream/?category=news_tech&count=20&bd_latitude=4.9E-324&bd_longitude=4.9E-324&bd_loc_time=1457695555&loc_mode=5&lac=4527&cid=28883&iid=3835029558&device_id=12211880440&ac=wifi&channel=baidu&aid=13&app_name=news_article&version_code=460&device_platform=android&device_type=iToolsAVM&os_api=19&os_version=4.4.4&uuid=352284041361761&openudid=84c1c7b192991cc6";
		Util ut = new Util() {

			@Override
			protected void onPostExecute(String result) {
				Gson gson = new Gson();
				Bean bean = gson.fromJson(result, Bean.class);
				da = bean.data;
				lv.setAdapter(new Adapter(da, SecActivity.this));
				super.onPostExecute(result);
			}
		};
		ut.execute(path);
	}
}