How to download file in Android using Retrofit library?

I need to download all types of file (binary, image, text, etc) using Retrofit library in my app. All the examples on the net is using HTML GET method. I need to use POST to prevent automatic caching.

My question is how to download a file using POST method in Retrofit?

Use @Streaming

Asynchronous

EDIT 1

//On your api interface
@POST("path/to/your/resource")
@Streaming
void apiRequest(Callback<POJO> callback);

restAdapter.apiRequest(new Callback<POJO>() {
        @Override
        public void success(POJO pojo, Response response) {
            try {
                //you can now get your file in the InputStream
                InputStream is = response.getBody().in();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        @Override
        public void failure(RetrofitError error) {

        }
    });

Synchronous

//On your api interface
@POST("path/to/your/resource")
@Streaming
Response apiRequest();

Response response = restAdapter.apiRequest();

try {
    //you can now get your file in the InputStream
    InputStream is = response.getBody().in();
} catch (IOException e) {
    e.printStackTrace();
}