ANDROID LOLLIPOP

Android 5.0 "Lollipop" is a version of the Android Mobile Operating System developed by Google. Unveiled on June 25, 2014, the operating system will be first made available in November 2014 for selected devices that run distributions of Android that are serviced by Google, including Nexus and Google Play Edition devices.

     The most prominent changes in Lollipop include a redesigned user interface built around a responsive design Language referred to as "material design". Other changes include improvements to the notification system which allow notifications to be accessed from the lock screen, and displayed within other apps as banners across the top of the screen. Internal changes were also made to the platform, with the Android Runtime(ART) officially replacing Dalvik for improved application performance, and changes intended to improve and optimize battery usage.The main features of Lollipop are
Enhanced notifications
1. Android L will make notifications even better. For starters you can get them on the lock screen - and they will be automatically ordered in priority. You will be able to swipe them away like normal or double tap to open the relevant app.
2. New lockscreen
Part of the Android L redesign is a new lockscreen which will show you notifications (see above image). You'll need to swipe up to unlock (if you don't have a lock pattern or other unlock method) but you can also swipe right to launch the dialler or left to launch the camera.
3. New multi-tasking
Forget a 2D list of open apps, the new recent apps section of Android L brings a Google Now card style layout. The open apps flow on a sort of carousel and can be swiped off to either side to close them as before.
It's not working on the developer preview but some apps, for example chrome, will be able to have multiple cards in recent apps. Android L will show a separate card for each open tab.
4. New notifcation bar
The Android L notification bar looks quite different to before. It works in the same way as before so a swipe from the top of the screen grants access. There's a new layout and colour scheme.
Instead of tapping a button to access quick settings you simply swipe downwards a second time. There is now screen brightness control as standard and a new 'cast screen' icon for mirroring with a Chromecast.
5. Security - personal unlocking
Google said that security is a key element for Android and its users. A new feature will enable users to unlock their smartphone when physically near enough a device like an Android Wear smartwatch. It's a bit like cars with keyless entry.
6. Battery life - new saver mode
Better battery life is something we always want and Google promises that Android L will bring it via a new battery saving mode. Project Volta will allow developers to identify how their apps are using battery so they make improvements.
Google said that the new battery saving mode will give a Nexus 5 an extra 90 minutes of power. The battery section of the settings menu now gives more detailed information, too.
7. Performance
As we expected, Android L will support 64-bit processors and it will also support the ART software library which Google says will be twice as fast as Davik.