在Firebase存储上上传后，图像无法显示在列表视图上

Question

 @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if(requestCode == RC_SIGN_IN){
            if (resultCode == RESULT_OK){
                    Toast.makeText(this,"Signed In !",Toast.LENGTH_LONG).show();

        }else if (resultCode == RESULT_CANCELED){
            Toast.makeText(this,"SignIn Cancelled !",Toast.LENGTH_LONG).show();
                finish();
        }

    }
    else if(requestCode == RC_PHOTO_PICKER && resultCode == RESULT_OK){
        Uri selectedImageUri = data.getData();

        StorageReference photoImageRef = mchatphotoStorageRef.child(selectedImageUri.getLastPathSegment());
//set the path of uri  e.g: image/pic.  jpeg


        //upload a file to firebase database.
        photoImageRef.putFile(selectedImageUri).
                addOnSuccessListener
                        (this, new OnSuccessListener<UploadTask.TaskSnapshot>()
                        {

                            @Override
                            public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
                                // Get a URL to the uploaded content

                        String downUrl=taskSnapshot.getMetadata().getReference().getDownloadUrl().getResult ().toString ();
                      //  Uri downUrl = Uri.parse (taskSnapshot.getMetadata ().getReference ().getDownloadUrl ().getResult().toString ());
                                //   taskSnapshot.getMetadata().getReference().getDownloadUrl().toString()
                                //  Uri downUrl = taskSnapshot.getMetadata ().getReference ().getDownloadUrl ().getResult ();

                                FriendlyMessage friendlyMessage = new FriendlyMessage(null,mUsername,downUrl);
                                myRef.push().setValue(friendlyMessage);
                            }
                        });

    }
}

消息适配器代码：

 @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        if (convertView == null) {
            convertView = ((Activity) getContext()).getLayoutInflater().inflate(R.layout.item_message, parent, false);
        }

    ImageView photoImageView = (ImageView) convertView.findViewById(R.id.photoImageView);
    TextView messageTextView = (TextView) convertView.findViewById(R.id.messageTextView);
    TextView authorTextView = (TextView) convertView.findViewById(nameTextView);

    FriendlyMessage message = getItem(position);

    boolean isPhoto = message.getPhotoUrl() != null;
    if (isPhoto) {
        messageTextView.setVisibility(View.GONE);
        photoImageView.setVisibility(View.VISIBLE);
        Glide.with(photoImageView.getContext())
                .load(message.getPhotoUrl())
                .into(photoImageView);
    } else {
        messageTextView.setVisibility(View.VISIBLE);
        photoImageView.setVisibility(View.GONE);
        messageTextView.setText(message.getText());
    }
    authorTextView.setText(message.getName());

    return convertView;
    }
}