Firebase Storage - Delete file

DeleteFile.java

private void deleteFile() {
  Helper.showDialog(this);
  imageRef.delete().addOnSuccessListener(new OnSuccessListener<Void>() {
    @Override
    public void onSuccess(Void aVoid) {
      Helper.dismissDialog();
      mImageView.setImageDrawable(null);
      mTextView.setText(String.format("%s was deleted.", imageRef.getPath()));
    }
  }).addOnFailureListener(new OnFailureListener() {
    @Override
    public void onFailure(@NonNull Exception exception) {
      Helper.dismissDialog();
      mTextView.setText(String.format("Failure: %s", exception.getMessage()));
    }
  });
}