* Based on: https://github.com/Mygod/mygod-lib-android/blob/683c41cb86d10e99ab0f457d41a218c6915fccc8/lib/src/main/scala/tk/mygod/preference/DropDownPreference.scala
* Make your preference support %s in summary. Override getSummaryValue to customize what to put in.
* Make your preference support %s in summary. Override getSummaryValue to customize what to put in.
* Based on: https://github.com/Mygod/mygod-lib-android/blob/eb20c57a0da70bb5dbc27104002f20fb1eb31d76/lib/src/main/scala/tk/mygod/preference/SummaryPreference.scala