Chapter 2Literature survey2.1Android MOSAndroid is now the best operating system. And it runs on Linux kernel V2.6. Initially, Android was developed for digital cameras and then for mobile phones, including smartphones and tablets. The Android platform is developed by the Open Handset Alliance, a team of organizations aimed at developing better mobile phones. Google leads this team. And it involves mobile carriers like T-Mobile, Sprint Nextel, handset makers Samsung, Sony, and HTC, component makers like Qualcomm and Texas Instruments, software platform and solution providers, and numerous corporations of marketing. HTC Dream was the first Android device introduced in 2017. the market. As the HTCDreams release date came, the Android group released SDK V1.0 and apps started developing for the Android platform. For the development of the Android market, Google sponsored the Android Developer Challenges, which encouraged people to develop applications. A few months later, HTCDream launched its smartphone and the Android Market was launched. This allowed users to download apps to their phones. 32.2 Android Platform Android features are very rich. Therefore, it would have been easy to confuse it with another computer operating system. The user interface subsystem includes: - Windows - Views - Widgets Android includes a browser developed on WebKit, identical to the Safari browser on the iPhone. Android also offers WiFi, Wireless Data, Bluetooth i.e. GPRS, 3G and new 4G apps. Android supports Google Maps and also supports Global Position System i.e. GPS. There is also camera support. But Android lags behind in graphics/media and data storage methods compared to the desktop operating system. There is built-in support for...... middle of paper...... id Emulator2.4 Parsing Technique The Parse platform provides the complete back-end for your mobile application. There is no need to write server code or maintain servers. One can save the database to an analytics cloud and then it can also be retrieved. Push notifications are used to notify each push user. In Push, the parsing library is used. The Parse library provides push notifications using Google Cloud Messaging (GCM). On devices that do not support GCM, Parse will use a background service that maintains a persistent connection to the Parse cloud to provide pushes. This allows ParsePush to work on all devices running Android 2.2 or higher. There are two ways to send push notifications using parse: - Channels: - Channels provide a simple and easy-to-use model for sending pushes. advanced targeting: advanced targeting offers a more powerful and flexible model.