Android OverridePendingTransition（）无法正常工作

Question

I am trying to animate the transition between two Activities with a simple fade animation .

When I use the standard android animations it works fine, but when I define my own animations, despite them being the exact same thing, it does not work and i don't see a transition.

Working code

Method call

((Activity) context).overridePendingTransition(android.R.anim.fade_in, android.R.anim.fade_out);

Android animation (fade_in.xml)

<alpha xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@interpolator/decelerate_quad"
    android:fromAlpha="0.0" android:toAlpha="1.0"
    android:duration="@android:integer/config_longAnimTime" />

---

Non working code

Method call

((Activity) context).overridePendingTransition(R.anim.activity_fade_in, R.anim.activity_fade_out);

Custom animation (res/anim/activity_fade_in.xml)

<alpha xmlns:android="http://schemas.android.com/apk/res/android"
   android:duration="500"
   android:fromAlpha="0.0"
   android:interpolator="@android:interpolator/decelerate_quad"
   android:toAlpha="1.0"/>

Answer 1

Change your code this way

<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/bounce_interpolator" >
      <alpha xmlns:android="http://schemas.android.com/apk/res/android"
            android:duration="500"
            android:fromAlpha="0.0"
            android:interpolator="@android:interpolator/decelerate_quad"
            android:toAlpha="1.0"/>
</set>

Answer 2

For some reason, unplugging my test device and coming back an hour later seems to have resolved the issue. I'm not quite sure what happened but everything seems to be working properly now.