Update progress bar with Firebase loading

Question

I tried to add a progress bar to upload files to firebase. but failure does not indicate download progress. both logcat and the progress bar only indicate when the file has reached 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

Change the grouping of terms in your calculation progressto force conversion to float. Since your code is now, you are sharing two long ones. The result of division will be 0 to getBytesTransferred() == getTotalByteCount(), then it will be 1.

 double progress = (100.0 * taskSnapshot.getBytesTransferred()) / taskSnapshot.getTotalByteCount();

Answer 2

When you send data to the repository, you can watch what you download.

let uploadTask = profileRef.putData(data, metadata: metadata) { (metadata, error) in
     if let error = error {
              // Awesome error handling 
     }
}

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task.observe(.progress, handler: { (snap) in
   print("Our upload progress is: \(String(describing: snap.progress?.fractionCompleted))")
})