HTTP网络请求GET方式请求

package com.example.day01_http03;

import android.annotation.SuppressLint;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class MainActivity extends AppCompatActivity {

    private EditText editText;
    private Button button;
    private TextView textView;
    private final int UPDATE_UI = 1;
    @SuppressLint("HandlerLeak")
    private Handler handler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case UPDATE_UI:
                    textView.setText(msg.obj.toString());
                    break;
            }
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //获取资源id
        editText = findViewById(R.id.ed_name);
        button = findViewById(R.id.btn);
        textView = findViewById(R.id.text);
        //点击
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                new Thread(
                        new Runnable() {
                            @Override
                            public void run() {
                                //获取输入框的值你
                                String s = editText.getText().toString();
                                query(s);
                            }
                        }
                ).start();
            }
        });
    }

    private String baseUrl = "https://tcc.taobao.com/cc/json/mobile_tel_segment.htm?tel=";

    private void query(String s) {

        try {
            //定义url地址
            URL url = new URL(baseUrl + s);
            //打开连接
            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
            //设置请求方式
            urlConnection.setRequestMethod("GET");
            //读取超时
            urlConnection.setReadTimeout(5000);
            //连接超时
            urlConnection.setConnectTimeout(5000);
            //获取连接状态
            int responseCode = urlConnection.getResponseCode();
            if (responseCode == 200) {
                //将字节流转换为字符流
                String s1 = stream1(urlConnection.getInputStream());
                //创建一个message
                Message message = handler.obtainMessage(UPDATE_UI, s1);
                //发送message
                handler.sendMessage(message);
            } else {
                Message message = handler.obtainMessage(UPDATE_UI, "error:" + responseCode);
                handler.sendMessage(message);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private String stream1(InputStream is) throws IOException {
        //将字节流转换为字符流
        InputStreamReader isr = new InputStreamReader(is, "gbk");
        //字符缓冲流
        BufferedReader br = new BufferedReader(isr);
        //创建stringbullder
        StringBuilder builder = new StringBuilder();
        //循环读取 将读取出来的值存入builder
        for (String t = br.readLine(); t != null; t = br.readLine()) {
            builder.append(t);
        }
        return builder.toString();
    }


}