android标题 折叠效果,android – 显示CollapsingToolbarLayout标题只有当折叠

您可以将OnOffsetChangedListener添加到AppBarLayout，以确定CollapsingToolbarLayout何时被折叠或展开，并将其设置为标题。

final CollapsingToolbarLayout collapsingToolbarLayout = (CollapsingToolbarLayout) findViewById(R.id.collapsingToolbarLayout);

AppBarLayout appBarLayout = (AppBarLayout) findViewById(R.id.appBarLayout);

appBarLayout.addOnOffsetChangedListener(new AppBarLayout.OnOffsetChangedListener() {

boolean isShow = false;

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(" ");//carefull there should a space between double quote otherwise it wont work

isShow = false;

}

}

});