Question

我正在尝试从android发送邮件到服务器，但它在执行时崩溃了。我无法看到是否发生任何错误，我无法弄清楚如何在android studio中监控http请求。这是我的代码

try {
                String rtoken = FirebaseInstanceId.getInstance().getToken();
                Log.v("tokken", rtoken);
                URL url = new URL("http://my website.com/yyy");
                HttpURLConnection conn = (HttpURLConnection) url.openConnection();
                conn.setReadTimeout(15001);
                conn.setConnectTimeout(15001);
                conn.setRequestMethod("POST");
                conn.setRequestProperty("pid",jo.getString("parent_id"));
                conn.setRequestProperty("sid",jo.getString("parent_id"));
                conn.setRequestProperty("token",rtoken);
                conn.setDoOutput(true);

                OutputStream outputPost = new BufferedOutputStream(conn.getOutputStream());
                writeStream(outputPost);
                outputPost.flush();
                outputPost.close();


            } catch (ProtocolException e1) {
                e1.printStackTrace();
            } catch (MalformedURLException e1) {
                e1.printStackTrace();
            } catch (IOException e1) {
                e1.printStackTrace();
            } catch (JSONException e1) {
                e1.printStackTrace();
            }

崩溃的堆栈跟踪（JsonParser.java:105）是行

OutputStream outputPost = new BufferedOutputStream（conn.getOutputStream（））;

我好几个小时都厌倦了这个问题。任何帮助将不胜感激，谢谢，

Answer 1

您不能在主线程上连接到网络（即MainActivity或其他视图）。

相反，请创建一个AsyncTask并从那里连接到网络。

Answer 2

我建议你阅读有关android线程管理的this article。您正试图在冻结UI的主线程上建立网络，这就是为什么您获得＆＃34; NetworkOnMainThread＆＃34;例外。尝试启动一个新线程并在那里进行网络连接：

(new Thread(){
        @Override public void run(){
            try {
                String rtoken = FirebaseInstanceId.getInstance().getToken();
                Log.v("tokken", rtoken);
                URL url = new URL("http://my website.com/yyy");
                HttpURLConnection conn = (HttpURLConnection) url.openConnection();
                conn.setReadTimeout(15001);
                conn.setConnectTimeout(15001);
                conn.setRequestMethod("POST");
                conn.setRequestProperty("pid",jo.getString("parent_id"));
                conn.setRequestProperty("sid",jo.getString("parent_id"));
                conn.setRequestProperty("token",rtoken);
                conn.setDoOutput(true);

                OutputStream outputPost = new BufferedOutputStream(conn.getOutputStream());
                writeStream(outputPost);
                outputPost.flush();
                outputPost.close();


            } catch (ProtocolException e1) {
                e1.printStackTrace();
            } catch (MalformedURLException e1) {
                e1.printStackTrace();
            } catch (IOException e1) {
                e1.printStackTrace();
            } catch (JSONException e1) {
                e1.printStackTrace();
            }
        }
}).start();

Android无法发送帖子

2 个答案: