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View System : Set of views which are used to create application user interfaces.
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Resource Manager : It provides access external non code base resources such as color, strings, dimensions and UI layouts. Following are the important services :Ĭontent Providers : Content providers permits applications to share data with other applications.Īctivity Manager : It controls all parts of the application lifecycle. Developers can use these services in their applications. Many advanced services are provided by application framework in the form of Java classes. Also offers different core libraries which allow Android app developers to write Android apps by means of Java programming language. The Dalvik Virtual Machine makes use of Linux core features like memory management, process management and multi-threading, which is fundamental in the Java language.
It is a kind of Java VM which is specially designed for Android. Provides an important component called Dalvik Virtual Machine. Runs on top of the kernel, Android has various libraries such as media library for playback of audio, surface manager to provide display management, Graphics libraries for 2D, 3D graphics, SQLite for local database. This kernel also manages all the memory and processes of the device.
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It consists of all the hardware drivers like audio, keypad, camera, display, etc. Provides abstraction layer between the device hardware. Android Architecture (Framework)Īndroid OS is a heap of components which is divided into five sections and four main layers as shown below :įigure 1 :Android Architecture Linux kernel In manifest file, you need to declare all application requirements, hardware access settings, minimum version of Android required, etc. Overall application behavior is affected by each component.Īll components in the application must be declared by manifest file. Some of the basics applications of androidĪndroid applications are collection of one or more application components.
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Android is offered as open source for developers to develop applications and provides Android SDK (Software development kit) for software development.
They can be developed using Cross-Platform technologies like Xamarin, PhoneGap (Cordova), Ionic, etc. Optimized graphics : It is powered by a custom 2D graphics library, 3D graphics.Īndroid applications can be written in Java, Kotlin programming language. Integrated Browser : Based on the open source Web-kit engine. It is optimized for garbage collection and has better debugging support. FeaturesĪpplication framework : It allows reuse and replacement of components. The android versions being called “Cupcake”, “Donut”, “Eclair”, “Froyo”, “Gingerbread”, “Honeycomb”, “Ice Cream Sandwich”, “Jellybean”, “KitKat”, “Lollipop”, “Marshmallow”, “Nougat’, ‘Oreo’, “Pie” respectively. Each release is named in alphabetical order after a desert. Since 2008, Android has number of updates which have improved the operating system with new features. It is based on the Linux Kernel and considered for touchscreen mobile as well as big screen devices like smartphones and tablets, smart TVs. was founded by Andy Rubin in 2003 and obtained by Google in 2005 and later the OHA (Open Handset Alliance). These applications make life more easy and innovative for users. NET Framework Questions and Answers BookĪSP.NET and AJAX Questions and Answers BookĮntity Framework 6.x Questions and Answers BookĮntity Framework Core Questions and Answers BookĪzure Administrator Questions and Answers BookĪzure Developer Questions and Answers BookĪSP.NET Web API Questions and Answers BookĪndroid is a mobile operating system developed by Google which supports a large number of applications in smartphones. NET Design Patterns Questions and Answers Book Learn Microservices: Beginner to Advanced Microsoft Certified Azure Developer Associate (AZ-204) Learn Xamarin Forms: Beginner to AdvancedĪWS Certified Cloud Practitioner (CLF-C01)ĪWS Certified Solutions Architect Associate (SAA-C02) Learn Entity Framework: Beginner to Advanced Learn ASP.NET Web API: Beginner to Advanced