JAVA与服务器php通信

Question

我想写一个非常简单的API。当我使用邮差API时。我想创建android应用程序，但我的应用程序崩溃了。为什么？哪里是错误

OkHttpClient zapytanie = new OkHttpClient();
                RequestBody requestBody = new FormBody.Builder()
                        .add("login", "some_email")
                        .add("password", "some_password")
                        .build();
                final Request request = new Request.Builder()
                        .header("Content-Type", "application/x-www-form-urlencoded")
                        .url("https://garlic-dragon.000webhostapp.com/registration.php")
                        .post(requestBody)
                        .build();
                try {
                    Response response = zapytanie.newCall(request).execute();
                    Toast.makeText(getApplicationContext(), "This is my success!",
                            Toast.LENGTH_LONG).show();
                } catch (IOException e) {
                    //e.printStackTrace();
                    Toast.makeText(getApplicationContext(), e.toString(),
                            Toast.LENGTH_LONG).show();
                }

Answer 1

错误必须是NetworkonMaintHreadException，这是因为您不能在主线程上执行同步HTTP。使用enqueue not execute异步运行请求。

     OkHttpClient zapytanie = new OkHttpClient();
     RequestBody requestBody = new FormBody.Builder()
                          .add("login", "some_email")
                          .add("password", "some_password")
                          .build();
     final Request request = new Request.Builder()
                          .header("Content-Type", "application/x-www-form-urlencoded")
                          .url("https://garlic-dragon.000webhostapp.com/registration.php")
                          .post(requestBody)
                          .build();
     try {
          Response response = zapytanie.newCall(request).enqueue(new Callback() {
          @Override
            public void onFailure(Request request, Throwable throwable) {
             // Something went wrong
            }

            @Override public void onResponse(Response response) throws IOException {
                 if (response.isSuccessful()) {
                  // Do what you want to do with the response.
                 } else {
                  // Request not successful
                 }
            }
           });
     } catch (IOException e) {
          //e.printStackTrace();
          Toast.makeText(getApplicationContext(), e.toString(),
           Toast.LENGTH_LONG).show();
     } 

我推荐使用类似于reverfit的库来进行更容易的API调用。