Whats Wrong With This Retrofit Call?

Im trying to send a POST and build a response using retrofit with Android. I have managed to send GET with no problems but now I need to send a POST with some body elements. public

Solution 1:

Well, if you try to send a POST request with retrofit2, you should try this:

First, create a Interface, in this interface you declare the body contents for POST request:

publicinterfaceISesion {

    @FormUrlEncoded@POST("/users/login")
    Call<Sesion> inSesion(@Field("username") String usuario, @Field("password") String password);
}

The parameter @Field is the body content that you use in your POST request

Now, you can make this in your MainActivity:

publicclassMainActivityextendsAppCompatActivity {
    privateRetrofit retrofit; //your Retrofit Objectprivate ISesion iSesion; //your interface@OverrideprotectedvoidonCreate(Bundle savedInstanceState) {
    retrofit = newRetrofit.Builder()
            .baseUrl(getString(R.string.url_base)) //your base URL ("http://www.myexample.com")
            .addConverterFactory(GsonConverterFactory.create())
            .build();

    iSesion = retrofit.create(ISesion.class);
    Call<Sesion> call = iSesion.inSesion(usuario, contrasena); //you get this fields from editText, for example, and you pass it to the method in your interface
        call.enqueue(newCallback<Sesion>() {
            @OverridepublicvoidonResponse(Call<Sesion> call, Response<Sesion> response) {
                code = response.code();
                switch (code) {
                    case200:
                        Intent intent = newIntent(getActivity(), MainActivity.class);
                        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
                        startActivity(intent);

                        break;
                    case401:
                        error = response.body().isError();
                        mensaje = response.body().getMensaje();
                        if (error) {
                            Snackbar.make(view, mensaje, Snackbar.LENGTH_LONG).show();
                        }
                        break;
                }
            }

            @OverridepublicvoidonFailure(Call<Sesion> call, Throwable t) {
                t.printStackTrace();
                Snackbar.make(view, getString(R.string.error_general), Snackbar.LENGTH_LONG).show();
            }
        });
    }
}

The model used in the method Call<Sesion> is the next:

publicclassSesion {

    @SerializedName("error")
    privateboolean error;

    @SerializedName("message")
    privateString mensaje;

    publicbooleanisError() {
        return error;
    }

    publicStringgetMensaje() {
        return mensaje;
    }
}  

EDIT:

If you want to send your token in the body content you couldtry this:

Call<Sesion> call = iSesion.inSesion("Basic " + generatedToken); // here is the authentication token
        call.enqueue(newCallback<Sesion>() {
            @OverridepublicvoidonResponse(Call<Sesion> call, Response<Sesion> response) {
                code = response.code();
                switch (code) {
                    case200:
                        Intent intent = newIntent(getActivity(), MainActivity.class);
                        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
                        startActivity(intent);

                        break;
                    case401:
                        error = response.body().isError();
                        mensaje = response.body().getMensaje();
                        if (error) {
                            Snackbar.make(view, mensaje, Snackbar.LENGTH_LONG).show();
                        }
                        break;
                }
            }

            @OverridepublicvoidonFailure(Call<Sesion> call, Throwable t) {
                t.printStackTrace();
                Snackbar.make(view, getString(R.string.error_general), Snackbar.LENGTH_LONG).show();
            }
        });
    }

and this is the Interface:

publicinterfaceISesion {

    @FormUrlEncoded@POST("/users/login")
    Call<Sesion> inSesion(@Field("token") String generatedToken);
}