Estoy enviando 10 valores a un servidor usando Retrofit2. Los valores que estoy enviando deben ser (según el registro):
Valores de getRecommendations :

-1, -1, -1, -1, -1, -1, 3, 25, 44.182345, 7.1627383.

Sin embargo, cuando envío los valores al servidor (a un script PHP) con actualización, se envían como
-1, -1 ,0 ,-1 ,-1 ,0 ,25 ,44.182345 , 7.1627383.
Lo sé porque estoy usando un interceptor PHP en Android Studio. Esto es lo que muestra el interceptor de PHP: maxGradientLo=-1&maxGradientHi=-1&totalDistanceLo=0&totalDistanceHi=-1&altitudeGainLo=-1&altitudeGainHi=-1&numberToRecommend=0&searchWithin=25&currentLatitude=44.182345&currentLongitude=7.1627349853515625

Estoy confundido en cuanto a por qué este es el caso: algunos de los valores simplemente han cambiado al azar, a continuación he adjuntado partes de mi código.

GetRecommendations () - envía datos al servidor

private List<RecommendationJsonResponse> jsonResponse = null;

private void getRecommendations(int maxGradientLo, int maxGradientHi, int totalDistanceLo, int totalDistanceHi, int altitudeGainLo, int altitudeGainHi, int numberToRecommend, int searchWithin, double currentLatitude, double currentLongitude){

        Log.d(Constants.SkiCompanionDebug, "getRecommendations values: " + maxGradientLo + ", "+ maxGradientHi + ", "+ totalDistanceLo + ", "+ totalDistanceHi + ", "+ altitudeGainLo + ", "+ altitudeGainHi + ", "+ numberToRecommend + ", "+ searchWithin);

        RetrofitApiInterface retrofitApiInterface = RetrofitApiClient.getApiClient().create(RetrofitApiInterface.class);

        Call<List<RecommendationJsonResponse>> callRecommendations = retrofitApiInterface.downloadRecommendations(maxGradientLo,  maxGradientHi, totalDistanceLo, totalDistanceHi, altitudeGainLo, altitudeGainHi, numberToRecommend, searchWithin, currentLatitude, currentLongitude);
        callRecommendations.enqueue(new Callback<List<RecommendationJsonResponse>>() {
            @Override
            public void onResponse(Call<List<RecommendationJsonResponse>> call, Response<List<RecommendationJsonResponse>> response) {
                jsonResponse = response.body();

                //calling helper functions to populate map with ski tracks
                List<List<GeoPoint>> trackList = new ArrayList<>();

                trackList = populateGeoPointLists();
                populateMap(trackList);


            }

            @Override
            public void onFailure(Call<List<RecommendationJsonResponse>> call, Throwable t) {
                Log.d(Constants.SkiCompanionDebug, "onFailure: downloadRecommendations: " + t.getMessage());
            }
        });
    }


Definición del método en la interfaz Retrofit

@POST("download_recommendations.php")
    @FormUrlEncoded
    Call<List<RecommendationJsonResponse>> downloadRecommendations(@Field("maxGradientLo") int maxGradientLo,
                                         @Field("maxGradientHi") int maxGradientHi,
                                         @Field("totalDistanceLo") int totalDistanceLo,
                                         @Field("totalDistanceHi") int totalDistanceHi,
                                         @Field("altitudeGainLo") int altitudeGainLo,
                                         @Field("altitudeGainHi") int altitudeGainHi,
                                         @Field("numberToRecommend") int numberToRecommend,
                                         @Field("searchWithin") int searchWithin,
                                         @Field("currentLatitude") double currentLatitude,
                                         @Field("currentLongitude") double currentLongitude);

Llamando a getRecommendations ()

final int[] gradient = new int[2];
final int[] distance = new int[2];
final int[] altitude = new int[2];
final int[] recommendNumber = new int[1];
final int[] searchWithin = new int[1];

//initializing variables
gradient[0] = -1;
gradient[1] = -1;
distance[0] = -1;
distance[1] = -1;
altitude[0] = -1;
altitude[1] = -1;
recommendNumber[0] = 3;
searchWithin[0] = 25;

getRecommendations(gradient[0], gradient[1], distance[0], distance[1], altitude[0], altitude[1], recommendNumber[0], searchWithin[0], 44.182345, 7.1627383);

Script PHP donde se publican los valores: tenga en cuenta que cuando hago eco, los valores son incorrectos, con los mismos valores que dio el interceptor PHP

$maxGradientLo = $_POST["maxGradientLo"]; //degrees
$maxGradientHi = $_POST["maxGradientHi"];
$totalDistanceLo = $_POST["totalDistanceLo"]; //kilometers
$totalDistanceHi = $_POST["totalDistanceHi"];
$altitudeGainLo = $_POST["altitudeGainLo"]; //meters
$altitudeGainHi = $_POST["altitudeGainHi"];
$numberToRecommend = $_POST["numberToRecommend"];
$searchWithin = $_POST["searchWithin"]; //number of kilometers track can be from user
$currentLatitude = $_POST["currentLatitude"]; 
$currentLongitude = $_POST["currentLongitude"];

// echo "gradLo: " .$maxGradientLo ." gradHi: " .$maxGradientHi." distLo: " .$totalDistanceLo." distHi: " .$totalDistanceHi." altLo: " .$altitudeGainLo." altHi: " .$altitudeGainHi. " numTorecommend: ".$numberToRecommend;

Extracto del interceptor OkHttp

02-22 17:12:31.967 25165-25426/skicompanion.skicompanion D/OkHttp: --> POST http://192.168.1.11/ski_companion/download_recommendations.php
02-22 17:12:31.967 25165-25426/skicompanion.skicompanion D/OkHttp: Content-Type: application/x-www-form-urlencoded
02-22 17:12:31.970 25165-25426/skicompanion.skicompanion D/OkHttp: Content-Length: 204
02-22 17:12:31.971 25165-25426/skicompanion.skicompanion D/OkHttp: maxGradientLo=-1&maxGradientHi=-1&totalDistanceLo=0&totalDistanceHi=-1&altitudeGainLo=-1&altitudeGainHi=-1&numberToRecommend=0&searchWithin=25&currentLatitude=44.182345&currentLongitude=7.1627349853515625
02-22 17:12:31.972 25165-25426/skicompanion.skicompanion D/OkHttp: --> END POST (204-byte body)
02-22 17:12:32.212 25165-25426/skicompanion.skicompanion D/OkHttp: <-- 200 OK http://192.168.1.11/ski_companion/download_recommendations.php (239ms)
02-22 17:12:32.212 25165-25426/skicompanion.skicompanion D/OkHttp: Date: Thu, 22 Feb 2018 17:12:33 GMT
02-22 17:12:32.212 25165-25426/skicompanion.skicompanion D/OkHttp: Server: Apache/2.4.29 (Win32) OpenSSL/1.1.0g PHP/7.2.1
02-22 17:12:32.213 25165-25426/skicompanion.skicompanion D/OkHttp: X-Powered-By: PHP/7.2.1
02-22 17:12:32.213 25165-25426/skicompanion.skicompanion D/OkHttp: Keep-Alive: timeout=5, max=100
02-22 17:12:32.213 25165-25426/skicompanion.skicompanion D/OkHttp: Connection: Keep-Alive
02-22 17:12:32.213 25165-25426/skicompanion.skicompanion D/OkHttp: Transfer-Encoding: chunked
02-22 17:12:32.213 25165-25426/skicompanion.skicompanion D/OkHttp: Content-Type: text/html; charset=UTF-8
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Clases extra de POJO

public class RetrofitApiClient {

    public static final String BASE_URL = "http://" + Constants.SERVER_IP + "/ski_companion/";
    public static Retrofit retrofit = null;

    public static Retrofit getApiClient(){
        if(retrofit == null){
            HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
            interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
            OkHttpClient client = new OkHttpClient.Builder()
                    .addInterceptor(interceptor)
                    .retryOnConnectionFailure(true)
                    .connectTimeout(15, TimeUnit.SECONDS)
                    .build();

            retrofit = new Retrofit.Builder().baseUrl(BASE_URL).
                    addConverterFactory(GsonConverterFactory.create()).client(client).build();
        }

        return retrofit;
    }
}
0
Shane Monks O'Byrne 22 feb. 2018 a las 19:58

2 respuestas

La mejor respuesta

Para implementar el patrón de diseño singleton para la instancia de Retrofit, consulte los siguientes códigos:

public class ApiClient extends Application {

    private static ApiClient apiClient = null; //singleton Object
    String apiURL = "http://your.url/";


    public static ApiClient getApiClient() {//getter for object
        if (apiClient == null)
            apiClient = new ApiClient();
        return apiClient;
    }

    @Override
    public void onCreate() {
        super.onCreate();
        Stetho.initializeWithDefaults(this);
    }

    public Retrofit getClient() {//Retrofit instance
        int myTime = 15;
        OkHttpClient.Builder okHttpBuilder = new OkHttpClient.Builder()
                .connectTimeout(myTime, TimeUnit.SECONDS)
                .readTimeout(myTime, TimeUnit.SECONDS)
                .writeTimeout(myTime, TimeUnit.SECONDS)
                .addNetworkInterceptor(new StethoInterceptor());

        Retrofit.Builder builder = new Retrofit.Builder()
                .baseUrl(apiURL)
                .client(okHttpBuilder.build())
                .addConverterFactory(GsonConverterFactory.create());
        return builder.build();
    }
}

Ahora para usar la modificación, consulte los siguientes códigos:

LoginDTO loginDTO = new LoginDTO(
            etPhno.getText().toString().trim(),
            etPass.getText().toString().trim()
    );

ApiService service = ApiClient.getApiClient().getClient().create(ApiService.class);
Call<LoginResp> call = service.loginAPI(loginDTO);
call.enqueue(new Callback<LoginResp>() {

    @Override
    public void onResponse(Call<LoginResp> call, Response<LoginResp> response) {

        LoginResp loginResp = response.body();

    }

    @Override
    public void onFailure(Call<LoginResp> call, Throwable t) {

        Toast.makeText(Login.this, "Error here", Toast.LENGTH_SHORT).show();
    }
});

En la interfaz de ApiService declare la función así:

    @POST("login")
    Call<LoginResp> loginAPI(@Body LoginDTO loginDTO);

La clase LoginDTO es la siguiente:

public class LoginDTO {
    @SerializedName("log_phno")
    @Expose
    private String user;

    @SerializedName("log_pass")
    @Expose
    private String pass;

    public LoginDTO(String user, String pass) {
        this.user = user;
        this.pass = pass;
    }

    public String getUser() {
        return user;
    }

    public String getPass() {
        return pass;
    }
}

Ahora la parte más importante, vaya al archivo de manifiesto y debajo de la etiqueta <application> ponga su nombre de clase singleton precedido por un punto (.) Como este:

android:name=".Controller.ApiClient"

Y por fin para ver la magia de Stetho Interceptor, ejecute su aplicación, abra Google Chrome y escriba chrome://inspect/

1
Sam 22 feb. 2018 a las 20:15

Responder

Este ha sido un problema extremadamente irritante y no entiendo completamente la solución. Si alguien pudiera explicar por qué no puedo llamar al método estáticamente, realmente lo agradecería. Se redujo a cómo estaba llamando a RetrofitApiClient: estaba llamando a getApiClient () estáticamente, pero lo arreglé creando un nuevo objeto de RetrofitApiClient y luego llamando a getApiClient () en eso. Solución a continuación:

Código roto antiguo:

RetrofitApiInterface retrofitApiInterface = RetrofitApiClient.getApiClient().create(RetrofitApiInterface.class);

Nuevo código de trabajo:

Obtener una instancia de RetrofitApiClient

RetrofitApiClient retrofitApiClient = RetrofitApiClient.getInstance();
        RetrofitApiInterface retrofitApiInterface = retrofitApiClient.getApiClient().create(RetrofitApiInterface.class);

Creando instancia en la clase RetrofitApiClient

private static Retrofit retrofit = null;

    public static RetrofitApiClient instance = null;

    public static RetrofitApiClient getInstance(){
        if(instance == null){
            instance = new RetrofitApiClient();
        }

        return instance;
    }
1
Shane Monks O'Byrne 22 feb. 2018 a las 20:18