Unknown animation name: cn.pedant.SweetAlert.Rotate3dAnimation error:null

[aichixiguaj]

new SweetAlertDialog(this, SweetAlertDialog.WARNING_TYPE)
.setTitleText("Are you sure?")
.setContentText("Won't be able to recover this file!")
.setConfirmText("Yes,delete it!")
.show();
初始化时候报错

[miladblg]

you should add an animation file to anim folder of res and use below code:

error_frame_in.xml:

<alpha
    android:fromAlpha="0"
    android:toAlpha="1"
    android:duration="400"/>

[kevinjam]

you should add an animation file to anim folder of res and use below code:

error_frame_in.xml:

<alpha
    android:fromAlpha="0"
    android:toAlpha="1"
    android:duration="400"/>

This is working well in Android Studio 4.1 Canary 
Just add error_frame_in.xml inside anim as @miladblg suggested
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <alpha
        android:fromAlpha="0"
        android:toAlpha="1"
        android:duration="400"/>
</set>

[rscherf]

I'm seeing this error again in Android Studio 4.1.3, with an error of:

Element sweet:cn.pedant.SweetAlert.Rotate3dAnimation is not allowed here

And the crash resolves as:

Unknown animation name: cn.pedant.SweetAlert.Rotate3dAnimation error:cn.pedant.SweetAlert.Rotate3dAnimation