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Android based os
- 1. PREPARED BY: ROBINSON SHAH AND ANCHOR KUTCHI POLYTECHNIC
- 2. Contents History Introduction of android Android versions Android architecture Security Features of android Advantages of android Disadvantage of android Conclusion
- 3. WHAT IS ANDROID? • It is a open source software platform and operating system for mobile devices • Based on the Linux kernel • Developed by Google and later the Open Handset Alliance (OHA) Allows writing managed code in the Java language • Android has its own virtual machine i.e. DVM(Dalvik Virtual Machine),which is used for executing the android application.
- 4. Open Handset Alliance • The open handset alliance(OHA) is a business alliance of firm to develop open standard for mobile devices. • Devoted to advancing open standards for mobile devices • Develop technologies that will significantly lower the cost of developing and distributing mobile devices and services.
- 5. Open Handset Alliance (OHA) included several companies
- 7. Android 1.1 (Beta) In Feb 2009, version 1.1 Android 1.5 (Cupcake) Launched in April 2009 Android 1.6 (Donut)-released in sept 2009 Android 2.0 2.1 (Éclair)-released in 26 October 2009 Android 2.2 (Froyo) released in the summer of 2010 Android 2.3 (Gingerbread) Gingerbread landed by the end of 2010 Android 3.0 (Honeycomb) For the first time Google released a software that was totally focused on tablets. This version, released in 2011 Android 4.0 (Ice Cream Sandwich 4.0) released in 2012 Android 4.1 (jelly bean4.1) released in 2013 Android 4.4 (kit kat4.4) released in 2013 Android 4.1 (jelly bean4.1) released in 2014 Android 5.0 (Lolipop 5.0) released in 2014 Android 6.0 (Marshmallow6.0) released in 2015 Android 7.0 (Nougat7.0) released in 2016 Android 1.0 (Alpha)The first version of the open source software in 2008 ANDROID VERSION
- 8. Upcoming Android Version ANDROID 8.0 (OREO)Will be Released october 2017
- 9. ANDROID ARCHITECTURE The software stack is split into Four Layers:: • The application layer • The application framework • The libraries and runtime • The kernel
- 10. LINUX KERNEL •The architecture is based on the Linux kernel. • This layer is core of android architecture. It provides service like power management, memory management, security etc. • It helps in software or hardware binding for better communication.
- 11. Android Run Time • The Android Runtime was designed specifically for Android to meet the needs of running in an embedded environment where you have limited battery, limited memory, limited CPU. • Core library is program written in the Java programming language. • Dalvik is the process virtual machine in Google's android operating system. It is the software that runs the apps on android devices. Dalvik is thus an integral part of android ,which is typically used on mobile devices such as mobile phones and tablet computers. • Programs are commonly written in java and compiled to byte code.
- 12. Application Framework •This is all written in a Java programming language and the application framework is the toolkit that all applications use. •These applications include the ones that come with a phone like the home applications, or the phone application. •It includes applications written by Google, and it includes apps that will be written by you. •So, all apps use the same framework and the same APIs.
- 13. Contd… These are as follows:- • Activity manager:-It manages the lifecycle of applications. It enable proper management of all the activities. All the activities are controlled by activity manager. • Resource manager:-It provides access to non-code resources such as graphics etc. • Notification manager:-It enables all applications to display custom alerts in status bar. • Location manager:- It fires alerts when user enters or leaves a specified geographical location. • Package manager:-It is use to retrieve the data about installed packages on device. • Window manager:-It is use to create views and layouts. • Telephony manager:-It is use to handle settings of network connection and all information about services on device.
- 14. APPLICATION LAYER •the final layer on top is Applications. •It includes the home application the contacts application , the browser, and apps. •It is the most upper layer in android architecture. •All the applications like camera, Google maps, browser,sms,calendars,contacts are native applications. These applications works with end user with the help of application framework to operate.
- 15. Security Android is a multi-process system, in which each application (and parts of the system) runs in its own process. Most security between applications and the system is enforced at the process level through standard Linux facilities, such as user and group IDs that are assigned to applications.
- 16. FEATURES OF ANDROID Java support ,media support, multi touch, video calling,multi tasking ,voice based features, screen capture, camera ,bluetooth,gps,compass and accelerometer,4G
- 17. •The ability for anyone to customize the Google Android platform •It gives you better notification. •It lets you choose your hardware. •It has better app market(1,80,000 application) •A more mature platform • With the support of many applications, the user can change the screen display. •With Google chrome you can open many window at once. • Supports all Google services: Android operating system supports all of Google services ranging from Gmail to Google reader. all Google services can you have with one operating system, namely Android. ADVANTAGES
- 18. DISADVANTAGES Android Market is less control of the manager, sometimes there are malware. Wasteful Batteries, This is because the OS is a lot of "process" in the background causing the battery quickly drains. Sometimes slow device company issued an official version of Android your own . Extremely inconsistence in design among apps. Very unstable and often hang or crash.
- 19. LIMITATIONS OF ANDROID Development requirements in •Java •Android SDK •Eclipse IDE (optional) •Bluetooth limitations:- Android doesn't support: Bluetooth stereo Contacts exchange Modem pairing Wireless keyboards •Firefox mobile isn't coming to android because of android limitations Apps in Android Market need to be programmed with a custom form of Java → Mozilla and the Fennec won't have that •There are no split or interval times available. •Small memory size. •Continuous Internet connection is required
- 20. THANK YOU