1. 在您的列表小部件的布局文件中，添加一个TextView来实现刷新，如下所示：

2. 在您的ListActivity或ListFragment中，使用Handler.postDelayed()方法来定时刷新列表，并显示刷新文本视图，如下所示：

private Handler mHandler = new Handler();
private TextView mRefreshText;
private boolean mIsVisibleToUser = false;

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);

    mRefreshText = (TextView)getView().findViewById(R.id.refresh_text);
    mHandler.postDelayed(mRefreshRunnable, 1000);
}

@Override
public void onResume() {
    super.onResume();
    mIsVisibleToUser = true;
}

@Override
public void onPause() {
    super.onPause();
    mIsVisibleToUser = false;
}

private Runnable mRefreshRunnable = new Runnable() {
    @Override
    public void run() {
        if (mIsVisibleToUser) {
            mAdapter.notifyDataSetChanged();
            mRefreshText.setVisibility(View.VISIBLE);
            mHandler.postDelayed(this, 1000);
        } else {
            mHandler.removeCallbacks(this);
        }
    }
};

3. 在您的Activity或Fragment中，重写onWindowFocusChanged()方法，以在小部件从后台返回时隐藏刷新文本视图，如下所示：

@Override
public void onWindowFocusChanged(boolean hasFocus) {
    super.onWindowFocusChanged(hasFocus);
    if (hasFocus) {
        mRefreshText.setVisibility(View.GONE);
    }
}