Gson은 API 응답을 변환 할 수 없습니다.

내가 당신을 때리면 api https://us-central1-gmx-notification.cloudfunctions.net/[email protected]&password=12345678

이 응답을 받았습니다

오류 : 요청을 처리 할 수 ​​없습니다.

따라서 오류가 Object를 예상했지만 문자열이 있다고 말합니다. 그래서 또는 백엔드 측의 오류 또는 요청이 올바르지 않거나 요청에 무언가를 추가하는 것을 잊었습니다 (헤더 또는 다른 것 ...).

모델에없는 문제는 응답에서 기대하는 모델이 아닙니다. OkHttpClient에 인터셉터를 추가하여 확실한 것을 확인하십시오.

이 종속성을 gradle에 추가해야합니다.

implementation 'com.squareup.okhttp3:logging-interceptor:3.9.1'

다음은 로그에있는 모든 네트워킹 항목을 인쇄하는 API 코드 예제입니다.

public class NetworkManager {

    private static RESTAuthService restAuthService;

    /*timeout values in seconds*/
    private static final int CONNECTION_TIMEOUT = 10;
    private static final int WRITE_TIMEOUT = 10;
    private static final int READ_TIMEOUT = 10;

    static RESTAuthService getRESTAuthService() {
        if (restAuthService == null) {
            synchronized (NetworkManager.class) {
                if (restAuthService == null) {

                    OkHttpClient client = new OkHttpClient.Builder()
                            .addInterceptor(new RESTInterceptor())
                            .connectTimeout(CONNECTION_TIMEOUT, TimeUnit.SECONDS)
                            .writeTimeout(WRITE_TIMEOUT, TimeUnit.SECONDS)
                            .readTimeout(READ_TIMEOUT, TimeUnit.SECONDS)
                            .build();

                    Retrofit retrofit = new Retrofit.Builder()
                            .baseUrl(NetworkConfig.BASE_AUTH_URL)
                            .addConverterFactory(GsonConverterFactory.create())
                            .client(client)
                            .build();

                    restAuthService = retrofit.create(RESTAuthService.class);
                }
            }
        }
        return restAuthService;
    }

    private static class RESTInterceptor implements Interceptor {

        @Override
        public Response intercept(Chain chain) throws IOException {
            Request request = chain.request();

            Buffer buffer = new Buffer();
            if (request.body() != null) {
                request.body().writeTo(buffer);
            }
            Log.d("HTTP Request", "Request to " + request.url().toString()
                    + "\n" + request.headers().toString()
                    + "\n" + buffer.readUtf8());
            long t1 = System.nanoTime();
            Response response = chain.proceed(request);
            long t2 = System.nanoTime();

            String msg = response.body().string();
            msg = msg.replace("\r", ""); // Note: Messages with '\r' not displayed correctly in logcat

            Log.d("HTTP Response", String.format("Response from %s in %.1fms%n\n%s",
                    response.request().url().toString(), (t2 - t1) / 1e6d, msg));

            Log.d("HTTP Response", "Response code = " + response.code());

            return response.newBuilder()
                    .body(ResponseBody.create(response.body().contentType(), msg))
                    .build();
        }
    }
    }

MyLogin 클래스는 다음과 같습니다.

public class MuLogin {
/*timeout values in seconds*/
    private static final int CONNECTION_TIMEOUT = 10;
    private static final int WRITE_TIMEOUT = 10;
    private static final int READ_TIMEOUT = 10;

    allApi = all_api;

    OkHttpClient client = new OkHttpClient.Builder()
        .addInterceptor(new RESTInterceptor())
        .connectTimeout(CONNECTION_TIMEOUT, TimeUnit.SECONDS)
        .writeTimeout(WRITE_TIMEOUT, TimeUnit.SECONDS)
        .readTimeout(READ_TIMEOUT, TimeUnit.SECONDS)
        .build();

    Retrofit retrofit = new Retrofit.Builder()
            .baseUrl("https://us-central1-gmx-notification.cloudfunctions.net/")
            .addConverterFactory(GsonConverterFactory.create())
            .client(client)
            .build();

    all_api =retrofit.create(allApi.class);

    public void getUserDetails(String userName, String passWord) {
        Call<User> call = all_api.getUserDetails(userName, passWord);
        call.enqueue(new Callback<User>() {
            @Override
            public void onResponse(Call<User> call, Response<User> response) {
                if (!response.isSuccessful()) {
                    Log.d(response.body());
                } else {
                    User user = response.body();
                    String content = "";
                    content += "Name: " + user.getName() + "\n";
                    content += "Email: " + user.getEmail() + "\n";
                    content += "Customer ID: " + user.getCustomerId() + "\n";
                    content += "Phone: " + user.getPhone() + "\n";
                    Log.d(content);
                }
            });
        }
    }
    private static class RESTInterceptor implements Interceptor {

        @Override
        public Response intercept(Chain chain) throws IOException {
            Request request = chain.request();

            Buffer buffer = new Buffer();
            if (request.body() != null) {
                request.body().writeTo(buffer);
            }
            Log.d("HTTP Request", "Request to " + request.url().toString()
                    + "\n" + request.headers().toString()
                    + "\n" + buffer.readUtf8());
            long t1 = System.nanoTime();
            Response response = chain.proceed(request);
            long t2 = System.nanoTime();

            String msg = response.body().string();
            msg = msg.replace("\r", ""); // Note: Messages with '\r' not displayed correctly in logcat

            Log.d("HTTP Response", String.format("Response from %s in %.1fms%n\n%s",
                    response.request().url().toString(), (t2 - t1) / 1e6d, msg));

            Log.d("HTTP Response", "Response code = " + response.code());

            return response.newBuilder()
                    .body(ResponseBody.create(response.body().contentType(), msg))
                    .build();
        }
    }
}