How to create a transparent demo on Android?

问题

I'm try to make a transparent activity in my Android application.

This is an example picture:

Does anyone know a library that can do this ?

回答1:

It goes like this:

<activity android:name=".usual.activity.Declaration"
android:theme="@android:style/Theme.Translucent.NoTitleBar" /> 

This should help you.

来源：https://stackoverflow.com/questions/16616864/how-to-create-a-transparent-demo-on-android