Android(安卓)使用 HttpURLConnection 实例

直接上干货，实例代码：

import android.annotation.SuppressLint;import android.app.Activity;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.view.KeyEvent;import android.view.View;import android.widget.TextView;import java.io.BufferedInputStream;import java.io.IOException;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.URL;import java.util.Scanner;public class MainActivity extends Activity {    private static final String TAG = "MainActivity";    private static final int SHOW_RESPONSE = 0;    @SuppressLint("HandlerLeak")    private Handler handler = new Handler() {        @Override        public void handleMessage(Message msg) {            switch (msg.what) {                case SHOW_RESPONSE:                    String response = (String) msg.obj;                    TextView textView = MainActivity.this.findViewById(R.id.response_text);                    if (null != textView) {                        textView.setText(response);                    }            }            super.handleMessage(msg);        }    };    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);    }    @Override    public boolean onKeyUp(int keyCode, KeyEvent event) {        if (keyCode == KeyEvent.KEYCODE_BACK) {            moveTaskToBack(true);        }        return super.onKeyUp(keyCode, event);    }    @Override    protected void onResume() {        super.onResume();    }    @Override    protected void onDestroy() {        super.onDestroy();    }    private String readInStream(InputStream in) {        Scanner scanner = new Scanner(in).useDelimiter("\\A");        return scanner.hasNext() ? scanner.next() : "";    }    public void sendRequestWithHttpURLConnection(View view) {        new Thread(new Runnable() {            @Override            public void run() {                HttpURLConnection urlConnection = null;                try {                    URL url = new URL("https://www.baidu.com/");                    urlConnection = (HttpURLConnection)url.openConnection();                    Message message = new Message();                    message.what = SHOW_RESPONSE;                    message.obj =                            readInStream(new BufferedInputStream(urlConnection.getInputStream()));                    handler.sendMessage(message);                } catch (IOException e) {                    e.printStackTrace();                } finally {                    urlConnection.disconnect();                }            }        }).start();    }}

布局文件的代码如下：

<?xml version="1.0" encoding="utf-8"?>

本文参考自《Android 第一行代码》

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