setting transparency to buttons in android

Question

I want to make Buttons with different transparency levels in android.I have used \"@android:color/transparent\". But it makes the button 100% transparent. I need a

Answer 1

Instead of this:

android:color="#66FF0000"    // Partially transparent red
android:alpha="0.25"         // 25% transparent 

you can use this:

android:background="#00FFFFFF"