带有 OKHTTP 的安卓 JSON POST

Question

我正在寻找一种解决方案来使用 OKHTTP 实现 JSON-POST 请求。我有一个处理所有方法(POST、GET、PUT、DELETE)的 HTTP-Client.java 文件，在 RegisterActivity 中我想将 JSON 格式的用户数据(来自输入字段)发布到服务器。

这是我的HTTP-Client.java

    public class HttpClient{

        public static final MediaType JSON
                = MediaType.parse("application/json; charset=utf-8");

        public static OkHttpClient client = new OkHttpClient.Builder()
                .cookieJar(new CookieJar() {
                    private final HashMap<String, List<Cookie>> cookieStore = new HashMap<>();

                    @Override
                    public void saveFromResponse(HttpUrl url, List<Cookie> cookies) {
                        cookieStore.put(url.host(), cookies);
                    }

                    @Override
                    public List<Cookie> loadForRequest(HttpUrl url) {
                        List<Cookie> cookies = cookieStore.get(url.host());
                        return cookies != null ? cookies : new ArrayList<Cookie>();
                    }
                })
                .build();

        public static Call post(String url, String json, Callback callback) throws IOException {
            RequestBody body = RequestBody.create(JSON, json);

            Request request = new Request.Builder()
                    .url(url)
                    .post(body.create(JSON, json))
                    .build();
            Call call = client.newCall(request);
            call.enqueue(callback);
            return call;
        }
}

...这是来自 RegisterActivity

的 onClick 部分

btnRegRegister.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //TODO

                String registerData = "{\"email\":\"" + etRegisterEmail.getText().toString() + "\",\"password\":\"" + etRegisterPasswort.getText().toString() + "\"}";


                try {
                    HttpClient.post(ABSOLUTE_URL, registerData, new Callback(){
                        @Override
                        public void onFailure(Call call, IOException e) {

                        }
                        @Override
                        public void onResponse(Call call, Response response) throws IOException {
                            if (response.isSuccessful()) {
                                String resp = response.body().string();
                                if (resp != null) {
                                    Log.d("Statuscode", String.valueOf(response.code()));
                                    Log.d("Body", response.body().string());
                                }
                            }
                        }
                    });
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });

每次我启动应用程序时，它都会在我单击注册按钮时崩溃，这是由致命的异常“android.os.NetworkOnMainThreadException”引起的

我已经读过一些关于 AsyncTask 的内容，但我不知道如何做到这一点。

Answer 1

在下面试试我的代码

  MediaType JSON = MediaType.parse("application/json; charset=utf-8");
        Map<String, String> params = new HashMap<String, String>();
        params.put("msisdn", "123123");
       params.put("name", "your name");
        JSONObject parameter = new JSONObject(param);
        OkHttpClient client = new OkHttpClient();

        RequestBody body = RequestBody.create(JSON, parameter.toString());
        Request request = new Request.Builder()
                .url(url)
                .post(body)
                .addHeader("content-type", "application/json; charset=utf-8")
                .build();

        client.newCall(request).enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                Log.e("response", call.request().body().toString());

            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                  Log.e("response", response.body().string());
            }


    });