Android application
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This document provides an overview of the components and structure of an Android application project. It discusses getting started with Eclipse, the main project components including source code, generated code, libraries, resources and the manifest file. It also describes the core application building blocks - activities for screens, intents for actions, services for background tasks, broadcast receivers for system messages, and content providers for sharing data. Each component is concisely defined, with services explained as running in the background for tasks like downloading or music playback.
Android application
- 1. ANDROID APPLICATION PHASE – I COMPUTER SCI. DEPARTMENT AMIRAJ COLLEGE OF ENGG. & TECH.
- 2. Contents: Getting Started Project Components Application Building Blocks
- 3. Getting Started with ECLIPS:
- 4. Project Components: src – your source code gen – auto-generated code Included libraries Resources i. Drawables (like .png images) ii. Layouts iii. Values (like strings) Manifest file
- 5. src – Source code src folder contains package of the Application and the external .java files created by the developer.
- 6. gen – Auto generated code gen folder contains auto generated .java files for supporting environment of the application.
- 7. Included libraries This includes files require to run an application on targeted sdk as well as minimum sdk i.e. selected by developer.
- 8. Manifest file Manifest contains security and link info, hardware access info, minimum OS release info, etc.
- 9. Application Building Blocks: Activity Intent Service Broadcast Receiver Content Provider
- 10. Activity Activity is a single screen with user interaction. An activity may contain zero or number of fragments. Each activity can then start another activity in order to perform different actions.
- 11. Intent What represents your action is called an Intent. It is the description of action during switch between the activity.
- 12. Service Service is the faceless component which run in background. Music player is an example of service. We don’t need to put it on the screen to hear songs. Downloading via internet is also an example of service. It goes on while the user is interacting with other applications. Service does not stop on closing of an application. It keeps on running in background until it’s task is done or the user manually destroys it. For example, a service might handle network transactions, play music, perform file I/O, or interact with a content provider, all from the background.
- 13. Broadcast Receiver Broadcast Receiver receives the system generated messages about system intents and display notification on occurrence of an intent of the Android System. For example, if the battery of your android device is low then the Android System will generate the message regarding to the LOW BATTERY and broadcast receiver receives that message from Android System and display the On-Screen notification regarding the subject.
- 14. Content Provider It simply enables sharing of data across applications. It provides access to the data of system application i.e. Phonebook, Gallery, etc. Android itself includes content providers that manage data such as audio, video, images, and personal contact information. With some restrictions, these providers are accessible to any Android application.
- 15. Thank You Presented By, Atufa I. Saiyed (121080107043) Raiyan J. Akhunji (121080107044)