Create an interface called Playing.
The interface has an abstract method called play(). Create classes called Child, Musician and Actor that implement Playing. Create a program that demonstrates the use of the classes.
I am a child and I am playing a game
I am a musician and I am playing a song
I am an actor and I am playing a part
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1、2.3.3版本（android-studio-bundle-162.4069837-windows.exe）2、AndroidStudio导入项目在 Building gradle project info 一直卡住查看所需gradle版本：打开C:\Users\用户名\.gradle\wrapper\dists\gradle-x.xx-all\xxxxxxxxxxxx，如果里面的gradle...