Retrofit 2 file down/upload

Question

I\'m trying to down/upload a file with retrofit 2 but can\'t find any tutorials examples on how to do so. My code for downloading is:

@GET(\"documents/checko         


        

Answer 1

Also I had this problem, This is how i try to solve my problem (RETROFIT 2 )

 //1. What We Need From Server ( upload.php Script )
    public class FromServer {
        String result;
    }

    //2. Which Interface To Communicate Our upload.php Script?
    public interface ServerAPI {

        @Multipart
        @POST("upload.php")//Our Destination PHP Script
        Call> upload(
                @Part("file_name") String file_name,
                @Part("file") RequestBody description);

         Retrofit retrofit =
                new Retrofit.Builder()
                        .baseUrl("http://192.168.43.135/retro/") // REMEMBER TO END with /
                        .addConverterFactory(GsonConverterFactory.create())
                 .build();
    }


    //3. How To Upload
    private void upload(){

            ServerAPI api = ServerAPI.retrofit.create(ServerAPI.class);

            File from_phone = FileUtils.getFile(Environment.getExternalStorageDirectory()+"/aa.jpg"); //org.apache.commons.io.FileUtils
            RequestBody to_server = RequestBody.create(MediaType.parse("multipart/form-data"), from_phone);

            api.upload(from_phone.getName(),to_server).enqueue(new Callback>() {
                @Override
                public void onResponse(Call> call, Response> response) {
                    Toast.makeText(MainActivity.this, response.body().get(0).result, Toast.LENGTH_SHORT).show();
                }
                @Override
                public void onFailure(Call> call, Throwable t) { }
            });


         }

//4. upload.php
"Done");
    print(json_encode($arr));
?>