尊重原创，从我做起。本文参考郭霖《第一行代码》，第2版。

一、网络请求

1.使用RLConnection

private void sendRequestWithHttpURLConnection(){
        new Thread(new Runnable() {
            @Override
            public void run() {
                HttpURLConnection httpURLConnection = null;
                BufferedReader reader = null;
                try{
                    URL url = new URL("http://www.baidu.com");
                    httpURLConnection = (HttpURLConnection) url.openConnection();
                    httpURLConnection.setRequestMethod("GET");
                    httpURLConnection.setConnectTimeout(8000);
                    httpURLConnection.setReadTimeout(8000);
                    InputStream in = httpURLConnection.getInputStream();
                    //对获得的流进行读取
                    reader = new BufferedReader(new InputStreamReader(in));
                    StringBuilder response = new StringBuilder();
                    String line;
                    while((line = reader.readLine()) != null){
                        response.append(line);
                    }
                    //处理相应
                    handleResponse(response.toString());

                }catch (Exception e){
                    e.printStackTrace();
                }finally {
                    if(reader != null){
                        try{
                            reader.close();
                        }catch (IOException e){
                            e.printStackTrace();
                        }
                    }
                    if(httpURLConnection != null){
                        httpURLConnection.disconnect();
                    }
                }
            }
        }).start();
    }

2.使用okHttp

private void sendRequestWithOkHttp(){
        new Thread(new Runnable() {
            @Override
            public void run() {
                try{
                    OkHttpClient okHttpClient = new OkHttpClient();

                    Request request = new Request.Builder()
                            .url("https://www.baidu.com")
                            .build();

                    Response response = okHttpClient.newCall(request).execute();
                    String responseData = response.body().string();
                    handleResponse(responseData);
                }catch (Exception e){
                    e.printStackTrace();
                }

            }
        }).start();
    }

二、对相应结果进行处理

若是要进行ui操作，必须要返回主线程

//处理网络请求的结果
    private void handleResponse(String responseData){
        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                //更新UI
                tv.setText(responseData);
            }
        });
    }