方法setProgress必须从UI线程调用吗？

runOnUiThread(new Runnable() {
    @Override
    public void run() {
        progressBar.setProgress(progress);
    }
});

Handler handler = new Handler(Looper.getMainLooper());
handler.post(new Runnable() {
    @Override
    public void run() {
        progressBar.setProgress(progress);
    }
});

private class UpdateProgressTask extends AsyncTask<Void, Void, Void> {
    @Override
    protected Void doInBackground(Void... params) {
        // 后台任务，不可在此方法中更新UI
        return null;
    }

    @Override
    protected void onPostExecute(Void result) {
        // 在此方法中更新UI
        progressBar.setProgress(progress);
    }
}

// 调用AsyncTask
new UpdateProgressTask().execute();