在CollapsingToolbarLayout编程方式更改layout_scrollFlags [英] Change layout_scrollFlags programmatically in CollapsingToolbarLayout

问题描述

我有以下CollapsingToolbarLayout标签在我的xml：

 ＆LT; android.support.design.widget.CollapsingToolbarLayout
                机器人：ID =@ + ID / collapsingToolbarLayout
                机器人：layout_width =match_parent
                机器人：layout_height =match_parent
                应用：contentScrim =？ATTR / colorPrimary
                应用：expandedTitleMarginStart =@扪/ expanded_toolbar_title_margin_start
                应用：layout_scrollFlags =exitUntilCollapsed＆GT;
 

我想以编程（运行时间）改变scrollFlags价值 - 具体而言，切换滚动的标志。这可能吗？

解决方案

  Col​​lapsingToolbarLayout collapsingToolbar =（CollapsingToolbarLayout）findViewById（R.id.collapsing_toolbar）;
AppBarLayout.LayoutParams PARAMS =（AppBarLayout.LayoutParams）collapsingToolbar.getLayoutParams（）;
params.setScrollFlags（AppBarLayout.LayoutParams.SCROLL_FLAG_SNAP）; //列表其他标志这里由|
collapsingToolbar.setLayoutParams（PARAMS）;
 

有一件事值得一提的 - setScrollFlags 覆盖所有previous标志，所以我们应该小心，不要失去已有的标志

I have the following CollapsingToolbarLayout tag in my xml:

            <android.support.design.widget.CollapsingToolbarLayout
                android:id="@+id/collapsingToolbarLayout"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                app:contentScrim="?attr/colorPrimary"
                app:expandedTitleMarginStart="@dimen/expanded_toolbar_title_margin_start"
                app:layout_scrollFlags="exitUntilCollapsed">

I would like to change the scrollFlags value programmatically (run time) - specifically, toggle the scrollable flag. Is it possible?

解决方案

CollapsingToolbarLayout collapsingToolbar = (CollapsingToolbarLayout) findViewById(R.id.collapsing_toolbar);
AppBarLayout.LayoutParams params = (AppBarLayout.LayoutParams) collapsingToolbar.getLayoutParams();
params.setScrollFlags(AppBarLayout.LayoutParams.SCROLL_FLAG_SNAP); // list other flags here by |
collapsingToolbar.setLayoutParams(params);

One thing worth mentioning - setScrollFlags overrides all previous flags so we should be careful not to lose already existing flag

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