在Android中同步两个ListViews的滚动

public class SyncScrollListener implements AbsListView.OnScrollListener {
    private ListView mListView1;
    private ListView mListView2;

    public SyncScrollListener(ListView listView1, ListView listView2) {
        mListView1 = listView1;
        mListView2 = listView2;
    }

    @Override
    public void onScrollStateChanged(AbsListView view, int scrollState) {
        // 不需要实现
    }

    @Override
    public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
        // 同步滚动
        View childView = view.getChildAt(0);
        if (view == mListView1 && childView != null) {
            int top = childView.getTop();
            mListView2.setSelectionFromTop(firstVisibleItem, top);
        } else if (view == mListView2 && childView != null) {
            int top = childView.getTop();
            mListView1.setSelectionFromTop(firstVisibleItem, top);
        }
    }
}

ListView listView1 = findViewById(R.id.list_view1);
ListView listView2 = findViewById(R.id.list_view2);

SyncScrollListener syncScrollListener = new SyncScrollListener(listView1, listView2);
listView1.setOnScrollListener(syncScrollListener);
listView2.setOnScrollListener(syncScrollListener);