It crashes if the container has no background

[Cofyka]

If you don't set any background on FrameLayout, lupe.create will crash throwing
"java.lang.NullPointerException: Attempt to invoke virtual method 'void android.graphics.drawable.Drawable.setAlpha(int)' on a null object reference"

To Reproduce

1. Go to your xml file
2. In your framelayout container don't set any background
3. try to create loupe

Expected behavior
It will crash with "java.lang.NullPointerException: Attempt to invoke virtual method 'void android.graphics.drawable.Drawable.setAlpha(int)' on a null object reference"

Environment

• Library Version: 1.2.2
• Device: HUAWEI ANE-LX1
• OS: Android 9.0

[Cofyka]

But I would strongly advise people not to use this monstrosity of library.