Abolfazl Bazghandi

add ``` defaultConfig { ... multiDexEnabled true } ``` to build.gradle

[solution](https://github.com/Clans/FloatingActionButton/issues/165#issuecomment-436229253)

hi i solved this issue with create notification icon in android studio [create icon in android studio ](https://developer.android.com/studio/write/image-asset-studio) 

see this commit => [df5f9e4](https://github.com/traex/RippleEffect/commit/df5f9e4456eae8a8e98e2827a3c6f9e7185596e1) use this code in line 166 if (Build.VERSION.SDK_INT < 23) { canvas.restore(); }