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Android滑动时隐藏FAB
source link: https://jiajunhuang.com/articles/2021_03_11-android_fab_hide.md.html
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Android滑动时隐藏FAB
我在BaseClass里加入了如下代码，实现了在滑动 RecyclerView 的时候，隐藏浮动按钮(FAB)：
fun setUpFABHide(recyclerView: RecyclerView, fab: FloatingActionButton) {
recyclerView.addOnScrollListener(object: RecyclerView.OnScrollListener() {
override fun onScrollStateChanged(recyclerView: RecyclerView, newState: Int) {
if (newState == RecyclerView.SCROLL_STATE_IDLE) {
fab.show()
}
super.onScrollStateChanged(recyclerView, newState)
}
override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
if (dy < 0 || dy > 0 && fab.isShown) {
fab.hide()
}
}
})
}
这样子在滑动的时候就会隐藏FAB，然后滑动停止时，FAB又会显示出来。
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