Get you an idea of how to start developing Android applications. Introduce major Android application concepts. Walk you through a sample application in the development environment. A free, open source mobile platform. A Linux-based, multiprocess, multithreaded OS. Android is not a device or a product.It’s not even limited to phones - you could build a DVR, a handheld GPS, an MP3 player, etc. Views are building blocks. Examples: TextView, EditText, ListView, ImageView, MapView, WebView.
Controls how Views are laid out :
• Frame Layout : each child a layer
• Linear Layout : single row or column
• Relative Layout : relative to other Views
• Table Layout : rows and columns
• Absolute Layout : <x,y> coordinates
Think of Intents as a verb and object; a description of what you want done:
• Examples: System matches Intent with Activity that can best provide that service.
• Activities and Broadcast Receivers describe what Intents they can service in their Intent Filters (via AndroidManifest.xml)
Components designed to respond to broadcast Intents:
• Think of them as a way to respond to external notiﬁcations or alarms
• Applications can invent and broadcast their own Intents as well
Faceless components that run in the background:
• Example: music player, network download, etc.
• Bind your code to a running service via a remote-able interface deﬁned in an IDL.
• Can run in your own process or separate process.
Enables sharing of data across applications:
• Examples: address book, photo gallery, etc.
• Provides uniform APIs for:
• querying (returns a Cursor).
• delete, update, and insert rows.
• Content is represented by URI and MIME type.
Application life cycle is managed by the system:
• Application start/stop is transparent to the user.
• End-user only sees that they are moving between screens.
• Read documentation for android.app.Activity.