OKHTTP 3 Monitoraggio Multipart caricare il progresso

Question

Come faccio a monitorare il progresso di caricamento in OkHttp 3 posso trovare risposte per v2, ma non v3, come this

Una richiesta Multipart campione ricette OkHttp

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 MultipartBody.Builder() 
      .setType(MultipartBody.FORM) 
      .addFormDataPart("title", "Square Logo") 
      .addFormDataPart("image", "logo-square.png", 
        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()); 
} 

Answer 1

È possibile decorare il corpo della richiesta di OkHttp per contare il numero di byte scritti durante la scrittura; per completare questo compito, avvolgi il tuo MultiPart RequestBody in questo RequestBody con un'istanza di Listener e Voila!

public class ProgressRequestBody extends RequestBody { 

    protected RequestBody mDelegate; 
    protected Listener mListener; 
    protected CountingSink mCountingSink; 

    public ProgressRequestBody(RequestBody delegate, Listener listener) { 
     mDelegate = delegate; 
     mListener = listener; 
    } 

    @Override 
    public MediaType contentType() { 
     return mDelegate.contentType(); 
    } 

    @Override 
    public long contentLength() { 
     try { 
      return mDelegate.contentLength(); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 
     return -1; 
    } 

    @Override 
    public void writeTo(BufferedSink sink) throws IOException { 
     mCountingSink = new CountingSink(sink); 
     BufferedSink bufferedSink = Okio.buffer(mCountingSink); 
     mDelegate.writeTo(bufferedSink); 
     bufferedSink.flush(); 
    } 

    protected final class CountingSink extends ForwardingSink { 
     private long bytesWritten = 0; 
     public CountingSink(Sink delegate) { 
      super(delegate); 
     } 
     @Override 
     public void write(Buffer source, long byteCount) throws IOException { 
      super.write(source, byteCount); 
      bytesWritten += byteCount; 
      mListener.onProgress((int) (100F * bytesWritten/contentLength())); 
     } 
    } 

    public interface Listener { 
     void onProgress(int progress); 
    } 
} 

Verificare this link per ulteriori informazioni.

Answer 2

Secondo la risposta di Sourabh, voglio dire a quel campo di CountingSink

private long bytesWritten = 0; 

deve essere spostato in ProgressRequestBody classe