Android Studio第三十一期 - 记录RecyclerView滚动位置并恢复
代码已经整理好，看下面~有一天你会用到的~不客气哈~
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//监听RecyclerView滚动状态
mRecyclerView.addOnScrollListener(
new
RecyclerView.OnScrollListener() {
@Override
public
void
onScrollStateChanged(RecyclerView recyclerView,
int
newState) {
super
.onScrollStateChanged(recyclerView, newState);
if
(recyclerView.getLayoutManager() !=
null
) {
getPositionAndOffset();
}
}
});
/**
* 记录RecyclerView当前位置
*/
private
void
getPositionAndOffset() {
LinearLayoutManager layoutManager = (LinearLayoutManager) mRecyclerView.getLayoutManager();
//获取可视的第一个view
View topView = layoutManager.getChildAt(
0
);
if
(topView !=
null
) {
//获取与该view的顶部的偏移量
lastOffset = topView.getTop();
//得到该View的数组位置
lastPosition = layoutManager.getPosition(topView);
}
}
/**
* 让RecyclerView滚动到指定位置
*/
private
void
scrollToPosition() {
if
(mRecyclerView.getLayoutManager() !=
null
&& lastPosition >=
0
) {
((LinearLayoutManager) mRecyclerView.getLayoutManager()).scrollToPositionWithOffset(lastPosition, lastOffset);
}
}
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本文转自 吴雨声 51CTO博客，原文链接：http://blog.51cto.com/liangxiao/1899155，如需转载请自行联系原作者
