Performance Rasterization CPU and GPU

1.Avoid over draw

2.

Android 4.1 Jelly Bean

Notification : Notable enhancement in android 4.1

1. User can act directly from notification bar
2. Notifications are more flexible in size and layout
3.  A Priority flag helps sort notification by Importance
4.  Notification can be collapsed and expand

New in android 5.0 lollipop 

1. Visual changes consistent with new material design theme.
2.  Notification can be possible in device lock screen hiding important informations behind .
3. HEAD-UPS notification format for high priority messages while when devices is in use
4. Cloud synch notification - Dismiss in one device lead dismissing in all other connected devices.