以编程方式更改工具栏和CollapsingToolbarLayout滚动标志 [英] Changing Toolbar and CollapsingToolbarLayout scroll flags programmatically
问题描述
我有一个带有很多片段的Activity Android应用程序.当我显示列表屏幕时，我想将Toolbar与app:layout_scrollFlags="scroll|enterAlways"属性一起使用.在细节片段中，我想将CollapsingToolbarLayout与其中的图像一起使用.由于它是一个Activity应用程序，因此我只有一个Toolbar.是否可以通过编程方式修改我的布局以适合两种情况?
I have a single Activity android app with lots of fragments. When I'm showing a list screen I want to use the Toolbar with the, app:layout_scrollFlags="scroll|enterAlways" property. And in the detail fragments I want to use the CollapsingToolbarLayout with an image in it. Since it's a single Activity app, I have only one Toolbar. Is it possible to modify my layout programmatically to suit both cases?
推荐答案
是.假设您要从CollapsingToolbarLayout片段转到工具栏一个.
Yes. Let's say you are going from the CollapsingToolbarLayout fragment to the Toolbar one.
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使用
AppBarLayout.setExpanded(false)折叠AppBarLayout;
您可以更改滚动标志以适合您的需求.
You change the scroll flags to fit your needs.
AppBarLayout.LayoutParams p = (AppBarLayout.LayoutParams) toolbar.getLayoutParams();
p.setScrollFlags(...);
toolbar.setLayoutParams(p);
如有必要，CollapsingToolbarLayout也是如此.我想应该是这样的:
Same goes for the CollapsingToolbarLayout if necessary. I guess it should be something like:
collapsingToolbarParams.setScrollFlags(0); //no flags for ctl
toolbarParams.setScrollFlags(SCROLL_FLAG_SCROLL | SCROLL_FLAG_ENTER_ALWAYS); //new flags for toolbar
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