两个活动之间的Android共享元素过渡不起作用 [英] Android shared element transition between two activities does not work
问题描述
在我的应用中,我试图使用新引入的活动之间的元素共享.如果共享元素的位置固定(例如android:layout_gravity="top"
),则所有内容都会像超级按钮一样工作,但问题是在锚定视图时出现的.
In my app I'm trying to use the newly introduced element sharing between activities. Everything works like a charm if the shared element is with fixed position (e.g. android:layout_gravity="top"
) but the problem comes when the view is anchored.
我的第一个活动是这样的:
My first activity looks like this:
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/tools"
xmlns:auto="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.design.widget.AppBarLayout
android:id="@+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content">
...
</android.support.design.widget.AppBarLayout>
<android.support.design.widget.FloatingActionButton
android:id="@+id/play_all"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|right"
android:layout_margin="24dp"/>
</android.support.design.widget.CoordinatorLayout>
我的第二项活动是这样的
My second activity looks like this
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:auto="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="@+id/list"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.design.widget.FloatingActionButton
android:id="@+id/play"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="16dp"
android:elevation="10dp"
android:src="@drawable/ic_action_play"
auto:layout_anchor="@+id/appbar"
android:transitionName="fab_button"
auto:layout_anchorGravity="bottom|right" />
<android.support.design.widget.AppBarLayout
android:id="@+id/appbar"
android:layout_width="match_parent"
android:layout_height="192dp">
...
</android.support.design.widget.AppBarLayout>
...
</android.support.design.widget.CoordinatorLayout>
我使用的代码如下:
Intent intent = ...;
ActivityOptions options = ActivityOptions.makeSceneTransitionAnimation(this, view, "fab_button");
startActivity(intent, options.toBundle());
如果我使用layout_anchor
和layout_anchorGravity
属性,则两个FAB之间的过渡将不进行动画处理.如果第二个FAB的位置固定,则可以正常工作.我在做什么错了?
If I use the layout_anchor
and layout_anchorGravity
attributes the transition between the two FABs is done with no animation. If the second FAB is with fixed position, it works perfectly. What am I doing wrong?
推荐答案
这可能会有点晚,但是我找到了解决此问题的方法.您必须将共享元素包装到一个布局中,然后将锚点放置在该布局上:
This might be a bit late, but I found a way around the issue. You have to wrap your shared element into a layout, and put the anchor on that layout:
<FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
auto:layout_anchor="@+id/appbar"
auto:layout_anchorGravity="bottom|right">
<android.support.design.widget.FloatingActionButton
android:id="@+id/play"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="16dp"
android:elevation="10dp"
android:src="@drawable/ic_action_play"
android:transitionName="fab_button" />
<FrameLayout/>
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