Android Tutorial

What is Android? Android is an open-source mobile operating system built on a Linux kernel, developed by Google and the Open Handset Alliance. Apps are written mainly in ...

The Four Layers Android is organised in layers, each with a clear responsibility: 1. Linux Kernel - memory, process and driver management; the security boundary of the platform. ...

What You Need The Android SDK - libraries, emulator and build tools. An IDE - Android Studio today; the Eclipse ADT plugin was the earlier standard shown in the classic ...

Project Structure A new Android project contains a manifest, the Java source (an Activity) and resources in res/ (layouts, strings, drawables). The layout XML defines the screen. ...

Activities An Activity represents one screen. The launcher activity is declared in the manifest and can start further activities with intents. Tabs and ViewFlipper TabHost groups ...

Storage Options SharedPreferences - small key-value settings. Internal storage - private files inside the app sandbox. SQLite database - structured relational data. External ...

Web Browser A WebView renders web pages inside your app: Camera Take photos with the camera activity or a raw preview surface. Sound and Text-to-Speech Play audio with MediaPlayer ...

2D Canvas Drawing Override onDraw(Canvas) in a custom View to paint shapes, text and bitmaps: SurfaceView SurfaceView allows drawing from a background thread - essential for ...