UploadStorage.java

   //upload image for firebase storage
    private void updateImage(ImageView imageView){
        // Create a storage reference from our app
        FirebaseStorage storage = FirebaseStorage.getInstance();
        StorageReference storageRef = storage.getReferenceFromUrl("<your-storage-url>");
        String uuid = UUID.randomUUID().toString();
        StorageReference mountainsRef = storageRef.child(uuid + ".jpg");

        imageView.setDrawingCacheEnabled(true);
        imageView.buildDrawingCache();
        Bitmap bitmap = imageView.getDrawingCache();
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
        byte[] data = baos.toByteArray();

        UploadTask uploadTask = mountainsRef.putBytes(data);
        uploadTask.addOnFailureListener(new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception exception) {
                // Handle unsuccessful uploads
            }
        }).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
            @Override
            public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
                // taskSnapshot.getMetadata() contains file metadata such as size, content-type, and download URL.
                Uri downloadUrl = taskSnapshot.getDownloadUrl();
                AddNewImageURL(downloadUrl);
                Log.e("info", downloadUrl.toString());
            }
        });