How to remove the default grey title bar on android apps

Fed up of the default title bar on your android applications?

We can get rid of that easy, either use the following in your activities to do it :

requestWindowFeature(Window.FEATURE_NO_TITLE);

Or, the way I prefer, disable it application wide by slipping the following into the AndroidManifest.xml file :

android:theme="@android:style/Theme.NoTitleBar"