Uploading a large file in multipart using OkHttp

Question

What are my options for uploading a single large file (more specifically, to s3) in multipart in Android using OKhttp?

Answer 1

From the OkHttp Recipes page, this code uploads an image to Imgur:

private static final String IMGUR_CLIENT_ID = "..."; private static final MediaType MEDIA_TYPE_PNG = MediaType.parse("image/png");  private final OkHttpClient client = new OkHttpClient();  public void run() throws Exception {   // Use the imgur image upload API as documented at https://api.imgur.com/endpoints/image   RequestBody requestBody = new MultipartBuilder()       .type(MultipartBuilder.FORM)       .addPart(           Headers.of("Content-Disposition", "form-data; name=\"title\""),           RequestBody.create(null, "Square Logo"))       .addPart(           Headers.of("Content-Disposition", "form-data; name=\"image\""),           RequestBody.create(MEDIA_TYPE_PNG, new File("website/static/logo-square.png")))       .build();    Request request = new Request.Builder()       .header("Authorization", "Client-ID " + IMGUR_CLIENT_ID)       .url("https://api.imgur.com/3/image")       .post(requestBody)       .build();    Response response = client.newCall(request).execute();   if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);    System.out.println(response.body().string()); } 

You'll need to adapt this to S3, but the classes you need should be the same.