Form data pakai Retrofit

FormDataRetrofit.txt

// Deklarasi end point di interface
@POST("v2/something")
Call<SomeResponse> doSomethingWithForm(@Body RequestBody request);

// Buat dulu form data
// Isi dengan field2 yang diinginkan
MultipartBody.Builder builder = new MultipartBody.Builder();
builder.setType(MultipartBody.FORM);
builder.addFormDataPart("field_1", "nilai1");
builder.addFormDataPart("field_2", "nilai2");
             
// Panggil HTTP request
ApiClient.getClient().create(ApiInterface.class).doSomethingWithForm(builder.build()).enqueue(new Callback<SomeResponse>() {

    @Override
    public void onResponse(Call<SomeResponse> call, Response<SomeResponse> response) {
        if (response.isSuccessful()) {
                                                   
        } else {
                                                   
        }
    }

    @Override
    public void onFailure(Call<SomeResponse> call, Throwable t) {
                                               
    }
});