ListView记录和恢复滑动位置

/**
 * 用于记录和恢复ListView的滑动位置
 * Created by ONEWateR on 2015/10/16.
 */
public class ListViewRecord {

    private ListView mListView;

    private int scrolledY;

    public ListViewRecord(ListView listView) {
        mListView = listView;
    }

    /**
     * 设置listView的滑动监听
     */
    public void initEvent() {
        mListView.setOnScrollListener(new AbsListView.OnScrollListener() {

            @Override
            public void onScrollStateChanged(AbsListView view, int scrollState) {
                // 不滚动时记录当前滚动到的位置
                if (scrollState == AbsListView.OnScrollListener.SCROLL_STATE_IDLE) {
                    record();
                }
            }

            @Override
            public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
            }
        });
    }

    /**
     * 记录位置
     */
    public void record() {
        scrolledY = getScrollY();
    }

    /**
     * 获取ListView的ScrollY
     * @return
     */
    public int getScrollY() {
        View c = mListView.getChildAt(0);
        if (c == null) {
            return 0;
        }
        int firstVisiblePosition = mListView.getFirstVisiblePosition();
        int top = c.getTop();
        return -top + firstVisiblePosition * c.getHeight() ;
    }

    /**
     * 恢复位置
     */
    public void restore() {
        mListView.post(new Runnable() {
            @Override
            public void run() {
                mListView.smoothScrollBy(scrolledY, 0);
            }
        });
    }

}
使用方法：
初始化

ListViewRecord record = new ListViewRecord(listView);
record.initEvent();
恢复

record.restore();