Until recently, Android design lacked definition and we had to fend for attractive apps as best we could. Now with Honeycomb and Ice Cream Sandwich, Google has shaped up and come out with an awesome design vision for the platform. For 3.0+, beauty can be native and the Action Bar is the new standard.
Read More - http://tech.xtremelabs.com/making-android-beautiful-with-actionbarsherlock/