ProgressDialog onProgressUpdate获取错误"DecorView: mWindow.mActivityCurrentConfig is null“

public class MyTask extends AsyncTask<Void, Integer, Void> {
    private ProgressDialog progressDialog;
    private Context context;

    public MyTask(Context context) {
        this.context = context;
    }

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        progressDialog = new ProgressDialog(context);
        progressDialog.setMessage("Loading...");
        progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
        progressDialog.show();
    }

    @Override
    protected Void doInBackground(Void... voids) {
        // 执行后台任务，更新进度
        for (int i = 0; i <= 100; i++) {
            publishProgress(i);
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        return null;
    }

    @Override
    protected void onProgressUpdate(Integer... values) {
        super.onProgressUpdate(values);
        progressDialog.setProgress(values[0]);
    }

    @Override
    protected void onPostExecute(Void aVoid) {
        super.onPostExecute(aVoid);
        progressDialog.dismiss();
    }
}