save a image to firebase and get dowload link in Android Studio Java

ImageStore.java

/**Start the image save to Firebase Storage in the database*/
    private String getExtension(Uri uri){
        ContentResolver contentResolver = getContentResolver(); //using for get the extention in image.
        MimeTypeMap mimeTypeMap = MimeTypeMap.getSingleton();
        return mimeTypeMap.getExtensionFromMimeType(contentResolver.getType(uri));
    }
    private void FileUploader() {
        storageTask = storageReference.child(System.currentTimeMillis()+"."+getExtension(imguri)).putFile(imguri)
                .addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
            @Override
            public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
                progressBar.setVisibility(View.INVISIBLE);

                /*Database ekata Image eke url eka save karawanawa*/
                HashMap<String,String> hashMap = new HashMap<>();

                //Get image Download URL//
                Task<Uri> uriTask = taskSnapshot.getStorage().getDownloadUrl();
                while (!uriTask.isSuccessful());
                Uri downloadUrl = uriTask.getResult();

                hashMap.put("imgUrl",downloadUrl.toString());
                /*Upload upload = new Upload(downloadUrl.toString()); *//**Upload class eka yodaagena unath apita puluwan data tika store karaganna ee unath hash map ekak nikan paawichchi kala*//*
*/
                String imgKey = databaseReference.push().getKey();
                databaseReference.child(imgKey).setValue(/*upload*/hashMap);



                Toast.makeText(ImageStore.this, "Image Uploaded Successfully!", Toast.LENGTH_SHORT).show();
            }
        });
    }
    /**End the image save to Firebase Storage in the database*/