本文介绍了仅在折叠时显示CollapsingToolbarLayout标题的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我尝试了setExpandedTitleColor
和setCollapsedTitleColor
(切换为透明)并没有运气.我也看不到任何可以满足我要寻找的内置方法.
I've tried setExpandedTitleColor
and setCollapsedTitleColor
(switching to and from transparent) with no luck. I can't see any built in methods that'll do what I'm looking for, either.
我只想在CollapsingToolbarLayout完全折叠时显示标题,否则,我需要将其隐藏.
I only want to show the title when the CollapsingToolbarLayout is fully collapsed, otherwise, I need it hidden.
有任何提示吗?
推荐答案
您可以将OnOffsetChangedListener
添加到AppBarLayout
,以确定CollapsingToolbarLayout
何时折叠或展开并设置其标题.
You can add OnOffsetChangedListener
to AppBarLayout
to determine when CollapsingToolbarLayout
is collapsed or expanded and set it's title.
final CollapsingToolbarLayout collapsingToolbarLayout = (CollapsingToolbarLayout) findViewById(R.id.collapsingToolbarLayout);
AppBarLayout appBarLayout = (AppBarLayout) findViewById(R.id.appBarLayout);
appBarLayout.addOnOffsetChangedListener(new AppBarLayout.OnOffsetChangedListener() {
boolean isShow = true;
int scrollRange = -1;
@Override
public void onOffsetChanged(AppBarLayout appBarLayout, int verticalOffset) {
if (scrollRange == -1) {
scrollRange = appBarLayout.getTotalScrollRange();
}
if (scrollRange + verticalOffset == 0) {
collapsingToolbarLayout.setTitle("Title");
isShow = true;
} else if(isShow) {
collapsingToolbarLayout.setTitle(" ");//careful there should a space between double quote otherwise it wont work
isShow = false;
}
}
});
科特林
Kotlin
var isShow = true
var scrollRange = -1
appBarLayout.addOnOffsetChangedListener(AppBarLayout.OnOffsetChangedListener { barLayout, verticalOffset ->
if (scrollRange == -1){
scrollRange = barLayout?.totalScrollRange!!
}
if (scrollRange + verticalOffset == 0){
collapsingToolbarLayout.title = "Title Collapse"
isShow = true
} else if (isShow){
collapsingToolbarLayout.title = " " //careful there should a space between double quote otherwise it wont work
isShow = false
}
})
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