Set transparent background of an imageview on Android
You can set the background transparent of any layout, any view, or any component by adding this code in XML:
android:background="@android:color/transparent"
In your XML set the Background attribute to any colour, White(#FFFFFF) shade or Black(#000000) shade. If you want transparency, just put 80 before the actual hash code:
#80000000
This will change any colour you want to a transparent one.. :)