我们如何在android中运行时从assets文件夹中删除文件？

private void copyFileFromAssets(String fileName) {
    try {
        InputStream inputStream = getAssets().open(fileName);
        OutputStream outputStream = new FileOutputStream(getFilesDir().getPath() + "/" + fileName);
        byte[] buffer = new byte[1024];
        int length;
        while ((length = inputStream.read(buffer)) > 0) {
            outputStream.write(buffer, 0, length);
        }
        outputStream.flush();
        outputStream.close();
        inputStream.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

copyFileFromAssets("example.txt");

File file = new File(getFilesDir().getPath() + "/" + fileName);
if (file.exists()) {
    file.delete();
}