Android architecture
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The Android architecture consists of 5 layers: the Linux kernel, native libraries, the Android runtime, application framework, and applications. The Linux kernel handles low-level system functionality like drivers. Native libraries provide common functions like media playback. The Android runtime includes the Dalvik VM and core Java libraries. It allows each app to run in its own process. The application framework offers higher-level services to apps like activity management and notifications. Finally, applications are built on top of the framework and distributed to users.
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Android the new Mobile Technoogypoojapainter Android is an open source operating system developed by Google and the Open Handset Alliance. It is based on the Linux kernel and uses Java for application development. Some key facts about Android include that it was developed to power smartphones and tablets, has seen continuous updates and version releases since 2007, and has grown tremendously in market share to power over 75% of global smartphones as of 2022. The document provides an overview of Android's history and development, technical components and architecture, programming tools and languages supported, and statistics on its rapid market growth over the past decade.
Android layouts
Android layoutspoojapainter This document discusses different layouts in Android, including linear layout, relative layout, table layout, absolute layout, frame layout, list view and grid view. It provides brief descriptions of each layout type, such as linear layout aligning all children vertically or horizontally, relative layout displaying views in relative positions, and table layout grouping views into rows and columns. Frame layout acts as a placeholder for a single view, list view displays a scrollable list of items, and grid view shows items in a two-dimensional, scrollable grid.
Anatomy of android aplication
Anatomy of android aplicationpoojapainter The document summarizes the key files and folders that make up an Android application project in Eclipse. It describes the purpose and contents of the main folders like src, gen, android 6.0 libraries, assets, bin, and res. It also explains the AndroidManifest.xml file, which describes global values for the application package and specifies permissions and IntentFilters. Key files include MainActivity.java in the src folder, the R.java file generated in gen, android.jar in android 6.0 libraries, and various resource files like images and layouts in the res folder. Upon building, the bin folder contains the compiled .apk and .dex files for distribution.
Overview of c
Overview of cpoojapainter This document provides an overview of key concepts in C programming including keywords, variables and constants, data types, operators, and format specifiers. It discusses that keywords are reserved words that cannot be used as variable names, and lists the 32 keywords in C. Variables are used to store data in memory locations identified by unique names (identifiers). Constants refer to fixed values that cannot be altered during program execution. The document also describes different data types in C including their sizes and ranges, common arithmetic, assignment, relational, logical, conditional, and bitwise operators. Finally, it mentions escape sequences and format specifiers used in C.
Android the new Mobile Technoogy
Android the new Mobile Technoogypoojapainter This document provides an overview of the Android operating system. It discusses that Android is an open source, Linux-based operating system designed for mobile devices. The key points covered include: the history and founders of Android; the various versions released over time; the core features and capabilities of Android like multi-touch, storage, and Bluetooth; the programming languages supported like Java, C/C++, and C#; and statistics on Android's market growth and daily device activations. Development tools for Android like Android Studio, the SDK, and Eclipse IDE are also summarized.
Introduction to compiler interpreter
Introduction to compiler interpreterpoojapainter The document discusses the roles of compilers, interpreters, and linkers. A compiler translates source code into assembly code or machine code, while an interpreter translates and executes code line-by-line. Compilation involves preprocessing source code, compiling it to object code, and then linking object files and libraries together to create an executable program.
Applets
Appletspoojapainter This document provides information about applets in Java. It defines an applet as a panel that allows interaction with a Java program and is typically embedded in a web page. It discusses how applets run in a sandbox with no access to the client's file system. The document outlines the main applet methods like init(), start(), stop(), and paint(), and explains the typical order they are called in. It also provides examples of basic applet code and HTML for embedding an applet in a web page.
Android the new Technology for mobile
Android the new Technology for mobilepoojapainter The document provides an overview of the Android operating system. It discusses that Android is an open source, Linux-based operating system designed for mobile devices. Key points include:
- Android was developed by Android Inc, which was acquired by Google in 2005. It is now managed by the Open Handset Alliance of 84 companies.
- The operating system uses Java programming languages and supports C/C++ and C# via tools like the Android SDK and emulator.
- Android has grown significantly, with daily device activations and a large app market. It powers many affordable smartphones and tablets due to its freely downloadable and open source nature.
Green i t
Green i tpoojapainter Green IT aims to reduce the environmental impact of IT. It focuses on developing and using computing technologies in a way that reduces waste and pollution, decreases energy usage, and promotes recycling and reuse of materials. The presentation discusses why Green IT is important by outlining issues like pollution from manufacturing and disposal of electronics, as well as the large amounts of energy used in powering computers, data centers, and other IT systems. It then provides solutions like reusing, refurbishing, and recycling electronics, as well as approaches to green computing like virtualization and power management. The presentation concludes by discussing ways individuals can be more green in their computing habits and options for greener web surfing.
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Android architecture
- 1. Android Architecture Mrs Pooja Chouhan
- 2. About.. Android architecture or Android software stack is categorized into five parts: 1. Linux kernel 2. Native libraries (middleware), 3. Android Runtime 4. Application Framework 5. Applications
- 4. Linux kernel At the bottom of the layers is Linux - Linux 3.6 with approximately 115 patches. This provides a level of abstraction between the device hardware and it contains all the essential hardware drivers like camera, keypad, display etc. Also, The kernel handles all the things that Linux is really good at such as networking and a vast array of device drivers, which take the pain out of interfacing to peripheral hardware.
- 5. Libraries On top of Linux kernel there is a set of libraries including open-source Web browser engine WebKit, well known library libc, SQLite database which is a useful repository for storage and sharing of application data, libraries to play and record audio and video, SSL libraries responsible for Internet security etc. This category encompasses those Java-based libraries that are specific to Android development. Examples of libraries in this category include the application framework libraries in addition to those that facilitate user interface building, graphics drawing and database access. A summary of some key core Android libraries available to the Android developer is as follows −
- 6. Android Libraries android.app − Provides access to the application model and is the cornerstone of all Android applications. android.content − Facilitates content access, publishing and messaging between applications and application components. android.database − Used to access data published by content providers and includes SQLite database management classes. android.opengl − A Java interface to the OpenGL ES 3D graphics rendering API. android.os − Provides applications with access to standard operating system services including messages, system services and inter-process communication. android.text − Used to render and manipulate text on a device display. android.view − The fundamental building blocks of application user interfaces. android.widget − A rich collection of pre-built user interface components such as buttons, labels, list views, layout managers, radio buttons etc. android.webkit − A set of classes intended to allow web-browsing capabilities to be built into applications. Having covered the Java-based core libraries in the Android runtime, it is now time to turn our attention to the C/C++ based libraries contained in this layer of the Android software stack.
- 7. Android Runtime This section provides a key component called Dalvik Virtual Machine which is a kind of Java Virtual Machine specially designed and optimized for Android. Dalvik VM makes use of Linux core features like memory management and multi-threading, which is intrinsic in the Java language. The Dalvik VM enables every Android application to run in its own process, with its own instance of the Dalvik virtual machine. The Android runtime also provides a set of core libraries which enable Android application developers to write Android applications using standard Java programming language.
- 8. Application Framework The Application Framework layer provides many higher-level services to applications in the form of Java classes. Application developers are allowed to make use of these services in their applications. The Android framework includes the following key services − Activity Manager − Controls all aspects of the application lifecycle and activity stack. Content Providers − Allows applications to publish and share data with other applications. Resource Manager − Provides access to non-code embedded resources such as strings, color settings and user interface layouts. Notifications Manager − Allows applications to display alerts and notifications to the user. View System − An extensible set of views used to create application user interfaces.
- 9. Applications You will find all the Android application at the top layer. You will write your application to be installed on this layer only. Examples of such applications are Contacts Books, Browser, Games etc.
- 10. Thank You