Question

I’m using the support library. Now, I want to have a fragment shifting in from the bottom, moving OVER the previous one.

For this I use this to keep the previous fragment (the one that is being slided over) visible until the new fragment is in its place:

<alpha xmlns:android="http://schemas.android.com/apk/res/android"
   android:fromAlpha="1.0" android:toAlpha="1.0" 
   android:duration="2500"
   android:zAdjustment="bottom" />

this is animation used for the new fragment to slide in from bottom:

<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate android:fromYDelta="100%p" android:toYDelta="0"
        android:duration="@android:integer/config_mediumAnimTime" 
        android:zAdjustment="top"/>

I’ve put the z adjustment to bottom and top for both, but still the ‘bottom’ animation is still on top of the new fragment! I have put the duration to 2500 for testing and it stays on top for the whole time.

Does zAdjustment not work for fragment animations?

Answer 1

According to this google group thread Z adjustment only works for window animations.

“The Z adjustment only works for window animations. I thought this was documented, but apparently not.”
— Dianne Hackborn (Android framework engineer)