seminar ppt on android lollipop

1. Technical Seminar
on
Guide:
Pro. SHRAVAN KUMAR
Presented By:
NANDAKISHOR

2. Context
 Introduction
 Technology used
 Dalvik vs ART
 Project volta
 Material design
 Features
 Kit kat vs Android Lollipop
 Advantages
 Limitations
 Future Scope
 Conclusion

3. INTRODUCTION
 Android “Lollipop” or simply “Android L” is the latest
version of the Android mobile operating system developed
by Google , spanning versions between 5.0 and 5.1.
 One of the most prominent changes in the Lollipop release
is a redesigned user interface built around a design
language reffered to as "material design".
 Other changes include improvements to the notifications.
 Google also made internal changes to the platform, with
the Android Runtime (ART) officially replacing Dalvik for
improved application performance.

4.  Android Runtime (ART) is an application run time environment used by
the Android mobile operating system.
 Android Runtime replaces Dalvik.
 ART brings improvements in performance, garbage collection, applications
debugging and profiling.
 To maintain backward compatibility, ART uses the same input bytecode as
Dalvik, supplied through standard .dex files as part of APK files, while
the .odex files are replaced with Executable and Linkable Format (ELF)
executables.

5.  Once an application is compiled by using ART's on-device dex2oat utility,
it is run solely from the compiled ELF executable.
 With no need for JIT compilation, the code should execute much faster.
 It doesn't hit the CPU as hard as just-in-time code compiling on Dalvik
(also results in less battery drain).

6. Fig: ART architecture

7. Dalvik
 Uses Just-In-Time (JIT) approach,
which results in lower storage
space consumption but longer app
load times.
 Cache builds up over time, so
boot times are faster.
 Works better for lower internal
storage devices as space occupied
is lesser.
 Is stable and time tested – VM of
choice for app developers.
ART
 Uses Ahead-Of-Time (AOT) approach,
which compiles apps when they’re
installed, resulting in faster load times
and lower processor usage.
 Cache is built at first boot, hence
rebooting device takes significantly
longer.
 Consumes much more internal storage.
 Is highly experimental and new – not a
lot of support from app developers yet.

8. Used to emphasizes improvements in battery life:
1. Scheduling jobs
2. Developer tools for battery usage
 Android 5.0 provides a new Job Scheduler API that lets you optimize
battery life by defining jobs for the system to run asynchronously.
 Start when charging / wifi / unmetered network/ idle / deadline or
minimum delay.
 The app has a number of tasks that you want to run as a batch on a regular
schedule.

9. The new dumpsys batterystats command generates interesting statistical
data about battery usage on a device, organized by unique user ID (UID).
The statistics include:
 History of battery related events.
 Global statistics for the device.
 Approximate power use per UID and system component.
 Per-app mobile ms per packet.
 System UID aggregated statistics.
 App UID aggregated statistics.

10.  it is a design with increased use of grid-based layouts, responsive
animations and transitions, padding, and depth effects such as lighting and
shadows.
PRINCIPLES
 Material is the metaphor.
 Bold, graphic, intentional.
 Motion provides meaning.

11.  Tap And Go
 Multiple device compatibility
 Prioritize your apps
 Jump to app setting
 Deal with notifications from lock screen
 Pinn apps
 Predict battery life
 Add trusted device
 Chrome cast more quickly
 Hang a ‘do not disturb’ sign
 Get back your apps after reboot etc etc…

12. Holo vs Material Design
• This is the single most visible difference between the two versions of Android.
Holo, introduced way back in Android 3.0.
Lock screen
• From personal unlocking to notifications and quick settings accessible from the
lock screen, Lollipop has it all at your fingertips. While KitKat had a camera
shortcut on the lock screen, Lollipop goes one better and adds a dialer shortcut
too.

13. Setting menu
• Again, the big change here is from dark to light, with Lollipop opting for a
light gray Roboto font with green icons on a white ground, compared to the
white on black with blue highlights of Holo-designed KitKat.
Battery life
• Battery life is improved and better than kitkat due to Project Volta .
Security
• KitKat didn't bring much new to the table in this respect, but it worked well
enough. Android Lollipop's big advance is going to be about making security
more convenient, and it will do this using two methods: Android Wear and
your current location.

14. Notifications
• Notifications have been Android's strong suit since day one, and Google is
making them even better in Android Lollipop. The big change here is that
they're being integrated into the lock screen.
• Ex : In Kit Kat a call would totally interrupt whatever activity you were
involved in where as in Android Lollipop, events such as these will pop up
at the top of the screen.

15.  Runs Multiple Apps at the Same Time.
 Keeps Information Visible on Your Home
Screen.
 Lets You Change Your Settings Faster.
 Does Google and Social Integration.
 Lets You Choose Your Hardware.
 Gives You Better Notifications.

16.  The code is pre-compiled at install time, so the
Installation process takes a bit longer time.
 Battery drainage, getting heat up when connected for charging.
 Wi-fi – signal strength is weak in some devices.

17.  Google may launch another version of Android that starts ‘M’.
 More future development of wristwatches, digital camera and other
devices with Android OS.
 Advanced media support, multi touch, multi tasking, voice based
features.
 Some innovative and new features with new version.

18.  Android lollipop(5.0) introduces a new design language, Material Design
and makes apps easier
 Google also made internal changes to the platform, with the ART officially
replacing Dalvik for improved application performance, and optimize
battery usage.
 We hope that the next versions of android have overcome the actual
limitations and that the future possibilities became a reality and may this
software is also developed to use in PC’s also.

19.  With Android L, Google makes pitch for enterprise users". Computerworld.
IDG. Retrieved June 26, 2014.
 Official android blog, Retrieved March 2015.
 "A Closer Look at Android RunTime (ART) in Android L". AnandTech.
Retrieved July 2014.
 www.android.com
 www.xmarin.com