Message in Chinese (Simplified) (中文(简体))
自定义活动的基本类型必须派生自 Activity 类。
Unlocalized message
The base type for a custom activity must derive from the Activity class.
Search by Google自定义活动的基本类型必须派生自 Activity 类。
The base type for a custom activity must derive from the Activity class.
Search by Google