2. Brief history about android.
Features of android.
Development challenges in android.
Android OS architecture.
Apps of android.
Apps Architecture.
Manifest file.
Activity life cycle.
Intent class.
Session Content
3. Foundation company.
Founders of Android OS.
Open Handset Alliance.
Why android is number one in the world.
Versions of android OS till now.
Android’s brief history …
4. Foundation company of Android OS:-
Android was founded in Palo Alto company in
October 2003 in California.
The main target was to invent an OS for
digital cameras but they were changed their
efforts to produce mobile OS.
In august Google was buying android.
Android’s brief history cont’d
5. Android founders:-
Andy Rubin (brain and manager of producing
android OS in google later).
Rich Miner.
Nick Sears.
Chris White.
Android’s brief history cont’d
6. On November 5, 2007, the Open Handset Alliance,
a consortium of technology companies including
Google
Device manufactures
Sony – Samsung – HTC
Wireless Carriers
sprint Nextel – T-Mobile
Chipset makers
Qualcom – Texas Instrument
Open Handset Alliance
7. Why android is number one in the world…?
In 2011,2013 Android devices sell more than
IOS, Windows Phone and Mac OS.
On July 2013 Google play stores had over 1
million android Apps published and over 5 billion
App downloaded.
In April-May 2013 71% of mobile developers developed
in android.
Android’s brief history cont’d
14. The manifest file is a mandatory file for every
application
Contains:
Application declaration
Activities
Services
Permissions
Hw and Sw resources used by the Application
Intent-filters
Manifest File
16. onCreate() Called when the activity is first created, a must!
onStart() Called when the activity becomes visible to the user
onResume() Called when the activity starts interacting with the
user
onPause() Called when the current activity is being paused and the
previous activity is being resumed
onStop() Called when the activity is no longer visible to the user
onDestroy() Called before the activity is destroyed by the system
(either manually or by the system to conserve memory)
onRestart() Called when the activity has been stopped and is
restarting again
Activity life cycle cont’d
17. Intents: asynchronous messages to activate
core Android components (e.g. Activities).
Explicit Intent The component (e.g. Activity1)
specifies the destination of the intent (e.g. Activity
2).
Intent class
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