HttpURLConnection应用

package com.lixinyang.day02;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.widget.TextView;

import com.google.gson.Gson;

import Utils.util;

public class MainActivity extends AppCompatActivity {
String uri="http://www.toutiao.com/api/pc/focus/";
Handler handler=new Handler(){
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);

}
};
private TextView tv;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv = (TextView) findViewById(R.id.tv);
pull();
}

private void pull() {
new Thread(){
@Override
public void run() {
super.run();
String aoto = util.aoto(uri);
Gson gson = new Gson();
Message message = gson.fromJson(aoto, Message.class);
//message.getData().getPc_feed_focus();

Message msg=new Message();
//message.obj=s;
handler.sendMessage(message);
}
}.start();
}
}

public class util {public static String aoto(String uri){try {URL url = new URL(uri);HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();InputStream inputStream = urlConnection.getInputStream();BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));String line=null;StringBuffer sb=new StringBuffer();while((line=bufferedReader.readLine())!=null){sb.append(line);}return sb.toString();} catch (MalformedURLException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}return "";}}