未在Android P中创建文件

Question

我正在创建File。它适用于除Pie版本之外的所有版本。这是我的代码。

private void writeToFile(String data, Context context) {
    try {
         File file = new File(Environment.getExternalStorageDirectory() + File.separator + "testApp.txt");
        if (!file.exists()) {
            file.createNewFile();
        }

        FileWriter writer = new FileWriter(file);
        writer.append(data);
        writer.flush();
        writer.close();
    } catch (IOException e) {
        Log.e("Exception", "File write failed: " + e.toString());
    }
}