如何关闭带有异步任务的进度对话框并避免"is your activity running error?“

private AsyncTask<Void, Void, Void> mTask;

ProgressDialog progressDialog = new ProgressDialog(MainActivity.this);
progressDialog.setMessage("Loading...");
progressDialog.setCancelable(false);
progressDialog.show();

mTask = new AsyncTask<Void, Void, Void>() {
    @Override
    protected Void doInBackground(Void... voids) {
        // 异步任务的逻辑处理
        return null;
    }

    @Override
    protected void onPostExecute(Void aVoid) {
        super.onPostExecute(aVoid);
        progressDialog.dismiss();
        if (!isCancelled()) {
            // 异步任务完成后的处理
        }
    }
};

mTask.execute();

@Override
protected void onDestroy() {
    super.onDestroy();
    if (mTask != null) {
        mTask.cancel(true);
        mTask = null;
    }
}