HttpUrlConnection Get请求

package com.example.administrator.myapplication.activity;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.webkit.WebView;
import android.widget.Button;

import com.example.administrator.myapplication.R;

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

public class HttpUrlConnectionGetActivity extends AppCompatActivity {
    WebView webView;
    Button httpUrlBtn;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_get);
        webView = (WebView) findViewById(R.id.baidu);
        httpUrlBtn = (Button) findViewById(R.id.HttpUrl);
        httpUrlBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                /*Thread thread = new Thread(new Runnable() {
                    @Override
                    public void run() {
                        HttpURLConnectionGet();
                    }
                });
                thread.start();*/
                //！！！网络请求HttpURLConnectionGet()要放在子线程中
                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        HttpURLConnectionGet();
                    }
                }).start();
            }
        });
    }
    //get请求
    private void HttpURLConnectionGet() {
        HttpURLConnection httpURLConnection = null;
        InputStream is = null;
        //StringBuilder:线程非安全，可有多线程采用，速度比StingBuffer快,用法同StringBuffer
        // StringBuffer:线程安全，只能单线程采用
        StringBuilder sb = new StringBuilder();
        try {
            //准备请求的网络地址
            URL url = new URL("http://apis.baidu.com/txapi/weixin/wxhot?num=10&page=1&word=%E7%9B%97%E5%A2%93%E7%AC%94%E8%AE%B0");
            //调用openConnection得到网络连接，网络连接处于就绪状态
            httpURLConnection = (HttpURLConnection) url.openConnection();
            //设置网络连接超时时间5S
            httpURLConnection.setConnectTimeout(5*1000);
            //设置读取超时时间
            httpURLConnection.setReadTimeout(5*1000);
            httpURLConnection.setRequestProperty("apikey","58218dcc8845195b277082c3a357f481");
            httpURLConnection.connect();
            //if连接请求码成功
            if (httpURLConnection.getResponseCode() == httpURLConnection.HTTP_OK){
                is = httpURLConnection.getInputStream();
                byte[] bytes = new byte[1024];
                int i = 0;
                while ((i = is.read(bytes)) != -1){
                    sb.append(new String(bytes,0,i,"utf-8"));
                }
                is.close();
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            if (httpURLConnection != null){
                httpURLConnection.disconnect();
            }
        }
        //发送消息:what消息类型，obj消息内容
        Message message = handler.obtainMessage(1,sb.toString());
        handler.sendMessage(message);
    }

    //Handler:消息处理机制(发消息，处理消息)，只能放在主线程中
    Handler handler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            if (msg != null && msg.what ==1){
                String s = (String) msg.obj;
                webView.getSettings().setDefaultTextEncodingName("utf-8");
                webView.getSettings().setJavaScriptEnabled(true);
                webView.loadDataWithBaseURL(null,s,"text/html","utf-8",null);
            }
        }
    };
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".activity.HttpUrlConnectionGetActivity">

    <WebView
        android:id="@+id/baidu"
        android:layout_width="match_parent"
        android:layout_height="400dp" />

    <Button
        android:id="@+id/HttpUrl"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="HttpUrlConnection Get请求"
        android:textAllCaps="false" />

</LinearLayout>