How to measure upload progress of a huge String with Retrofit 2?

How to measure upload progress of a huge String with Retrofit 2?

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How to measure upload progress of a huge String with Retrofit 2?
Tag : android , By : Ansari
Date : November 20 2020, 04:01 AM

To fix this issue As in this example: Extend OkHttp3's RequestBody and overwrite writeTo(BufferedSink sink) for String yourHugeString instead of a file:
    public void writeTo(BufferedSink sink) throws IOException {
        StringReader in = new StringReader(yourHugeString);
        char[] buffer = new char[2048]; // you can modifiy the buffer
        try {
            int read;
            while ((read = in.read(buffer)) != -1) {
                sink.write(new String(buffer).getBytes(), 0, read);
        } finally {
void postSpecialData(SpecialRequestBody base64, Callback callback);

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Is it possible to show progress bar when upload image via Retrofit 2?

Tag : android , By : Giles
Date : March 29 2020, 07:55 AM
I wish did fix the issue. First of all, you should use Retrofit 2 version equal to or above 2.0 beta2. Second, create new class extends RequestBody:
public class ProgressRequestBody extends RequestBody {
    private File mFile;
    private String mPath;
    private UploadCallbacks mListener;
    private String content_type;

  private static final int DEFAULT_BUFFER_SIZE = 2048;

    public interface UploadCallbacks {
        void onProgressUpdate(int percentage);
        void onError();
        void onFinish();
public ProgressRequestBody(final File file, String content_type,  final  UploadCallbacks listener) {
    this.content_type = content_type;
    mFile = file;
    mListener = listener;            

    public MediaType contentType() {
        return MediaType.parse(content_type+"/*");

public long contentLength() throws IOException {
  return mFile.length();

public void writeTo(BufferedSink sink) throws IOException {
    long fileLength = mFile.length();
    byte[] buffer = new byte[DEFAULT_BUFFER_SIZE];
    FileInputStream in = new FileInputStream(mFile);
    long uploaded = 0;

try {
            int read;
            Handler handler = new Handler(Looper.getMainLooper());
            while ((read = in.read(buffer)) != -1) {

            // update progress on UI thread
                handler.post(new ProgressUpdater(uploaded, fileLength));

                uploaded += read;
                sink.write(buffer, 0, read);
        } finally {

private class ProgressUpdater implements Runnable {
        private long mUploaded;
        private long mTotal;
        public ProgressUpdater(long uploaded, long total) {
            mUploaded = uploaded;
            mTotal = total;

        public void run() {
            mListener.onProgressUpdate((int)(100 * mUploaded / mTotal));            
    Call<JsonObject> uploadImage(@Part MultipartBody.Part file);
class MyActivity extends AppCompatActivity implements ProgressRequestBody.UploadCallbacks {

        ProgressBar progressBar;

        protected void onCreate(Bundle savedInstanceState) {

            progressBar = findViewById(R.id.progressBar);

            ProgressRequestBody fileBody = new ProgressRequestBody(file, this);
            MultipartBody.Part filePart = 

            MultipartBody.Part.createFormData("image", file.getName(), fileBody);

            Call<JsonObject> request = RetrofitClient.uploadImage(filepart);

             request.enqueue(new Callback<JsonObject>() {
             public void onResponse(Call<JsonObject> call,   Response<JsonObject> response) {
                /* Here we can equally assume the file has been downloaded successfully because for some reasons the onFinish method might not be called, I have tested it myself and it really not consistent, but the onProgressUpdate is efficient and we can use that to update our progress on the UIThread, and we can then set our progress to 100% right here because the file already downloaded finish. */

            public void onFailure(Call<JsonObject> call, Throwable t) {
                      /* we can also stop our progress update here, although I have not check if the onError is being called when the file could not be downloaded, so I will just use this as a backup plan just in case the onError did not get called. So I can stop the progress right here. */


        public void onProgressUpdate(int percentage) {
            // set current progress

        public void onError() {
            // do something on error

        public void onFinish() {
            // do something on upload finished,
            // for example, start next uploading at a queue


How to pass request string param using Retrofit for file Upload?

Tag : android , By : user157654
Date : March 29 2020, 07:55 AM
may help you . You can use @PartMap annotation to pass parameters along with File request. PartMap is a Map of "Key" and RequestBody. So first, you have to create RequestBody object of the parameter that you want to pass and then create Map object of it and pass it as argument.
For example your method in api interface would be,
    Call<ResponseBody> uploadFileWithPartMap(
            @PartMap() Map<String, RequestBody> partMap,
            @Part MultipartBody.Part file);
MultipartBody.Part body = prepareFilePart("photo", fileUri);

// create a map of data to pass along
RequestBody token= RequestBody.create(
        MediaType.parse(MULTIPART_FORM_DATA), "token_string");
HashMap<String, RequestBody> map = new HashMap<>();  
map.put("token", token);  


private MultipartBody.Part prepareFilePart(String partName, Uri fileUri) {  
    // https://github.com/iPaulPro/aFileChooser/blob/master/aFileChooser/src/com/ipaulpro/afilechooser/utils/FileUtils.java
    // use the FileUtils to get the actual file by uri
    File file = FileUtils.getFile(this, fileUri);

    // create RequestBody instance from file
    RequestBody requestFile =
        RequestBody.create(MediaType.parse(MULTIPART_FORM_DATA), file);

    // MultipartBody.Part is used to send also the actual file name
    return MultipartBody.Part.createFormData(partName, file.getName(), requestFile);
// finally, execute the request
Call<ResponseBody> call = service.uploadFileWithPartMap(map, body);  

upload a file with retrofit and which has a progress bar

Tag : android , By : jrf
Date : March 29 2020, 07:55 AM
To fix the issue you can do If you are using Retrofit 2, maybe you could find this answer helpful Is it possible to show progress bar when upload image via Retrofit 2

How to measure Retrofit networking duration?

Tag : android , By : Tamizhvendan
Date : March 29 2020, 07:55 AM
wish help you to fix your issue You can use new OkHttp EventListener API: https://github.com/square/okhttp/wiki/Events
You can measure network duration with saving difference between callStart and callEnd

Retrofit 2 can't upload a file with two additional separate string parameters

Tag : android , By : ZsA
Date : March 29 2020, 07:55 AM
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