如何在listView中列出firebase Storage中的文件并选择要下载的文件

Question

enter image description here我在firebase的存储引用中上传了一些文件，我希望在listview中显示这些文件，让用户选择特定文件并下载。 word或powerpoint等文件。 这是上传代码：

    if (filePath != null) {
        //displaying a progress dialog while upload is going on
        final ProgressDialog progressDialog = new ProgressDialog(getActivity());
        progressDialog.setTitle("Uploading");
        progressDialog.show();
        mStorageRef = FirebaseStorage.getInstance().getReference();



        mStorageRef= mStorageRef.child(Coursename +"/"+ filename);
        mStorageRef.putFile(filePath)
                .addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
                    @Override
                    public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
                        //if the upload is successfull
                        //hiding the progress dialog
                        progressDialog.dismiss();

                        //and displaying a success toast
                        Toast.makeText(getActivity(), "File Uploaded ", Toast.LENGTH_LONG).show();
                    }
                })
                .addOnFailureListener(new OnFailureListener() {
                    @Override
                    public void onFailure(@NonNull Exception exception) {
                        //if the upload is not successfull
                        //hiding the progress dialog
                        progressDialog.dismiss();

                        //and displaying error message
                        Toast.makeText(getActivity(), exception.getMessage(), Toast.LENGTH_LONG).show();
                    }
                })
                .addOnProgressListener(new OnProgressListener<UploadTask.TaskSnapshot>() {
                    @Override
                    @SuppressWarnings("VisibleForTests")
                    public void onProgress(UploadTask.TaskSnapshot taskSnapshot) {
                        //calculating progress percentage
                        double progress = (100.0 * taskSnapshot.getBytesTransferred()) / taskSnapshot.getTotalByteCount();

                        //displaying percentage in progress dialog
                        progressDialog.setMessage("Uploaded " + ((int) progress) + "%...");
                    }
                });
    }
    //if there is not any file
    else {
        //you can display an error toast
        Log.i("errorMessage","Error");
    }
}

但是我无法找到列出文件的正确代码 这是存储的截图：

原谅新手