HttpUrlConnection中url写http不行，使用https可以

Question

求解？使用http没有返回。访问的是http://www.baidu.com，使用GET方法。

package com.example.sty.httpurlconnectiontest;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
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 static final int SHOW_RESPONSE = 0;

    private Button mButton;

    private Handler handler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case SHOW_RESPONSE:
                    mResponseText.setText((String) msg.obj);
                    break;
                default:
                    break;
            }
        }
    };
    private TextView mResponseText;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mButton = (Button) findViewById(R.id.btn_send_request);
        mResponseText = (TextView) findViewById(R.id.tv_response);

        mButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                sendRequestWithUrlConnection();
            }
        });
    }

    private void sendRequestWithUrlConnection() {
        new Thread(new Runnable() {
            @Override
            public void run() {
                HttpURLConnection connection = null;
                try {
                    URL url = new URL("http://www.baidu.com");
                    connection = (HttpURLConnection) url.openConnection();

                    connection.setRequestMethod("GET");
                    connection.setConnectTimeout(5000);
                    connection.setReadTimeout(5000);

                    InputStream inputStream = connection.getInputStream();

                    StringBuilder response = new StringBuilder();

                    BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));

                    String line;

                    while ((line = bufferedReader.readLine()) != null) {
                        response.append(line);
                    }

                    Message message = new Message();
                    message.what = SHOW_RESPONSE;
                    message.obj = response.toString();
                    handler.sendMessage(message);

                } catch (IOException e) {
                    e.printStackTrace();
                } finally {
                    if (connection != null) {
                        connection.disconnect();
                    }
                }

            }
        }).start();
    }
}

Answer 1

百度就是 https啊 不是http