android - update progress bar with Firebase uploading

Question

I tried to add a progress bar to uploading files on firebase. but unfortunalty it does not indicate upload progress. both logcat & progress bar only indicate when file reached to 100%

   uploadTask.addOnProgressListener(new OnProgressListener<UploadTask.TaskSnapshot>() {
            @Override
            public void onProgress(UploadTask.TaskSnapshot taskSnapshot) {
                double progress = 100.0 * (taskSnapshot.getBytesTransferred() / taskSnapshot.getTotalByteCount());
                System.out.println("Upload is " + progress + "% done");
            int currentprogress = (int) progress;
                progressBar.setProgress(currentprogress);
            }
        }).addOnPausedListener(new OnPausedListener<UploadTask.TaskSnapshot>() {
            @Override
            public void onPaused(UploadTask.TaskSnapshot taskSnapshot) {
                System.out.println("Upload is paused");
            }
        });

Answer 1

Waitting for answers