introduction to fragments in android
DESCRIPTION
Introduction to fragments in android by Ritesh BhattaraiTRANSCRIPT
An Introduction To Fragments In Android
By: Ritesh Bhattarai(reetesh.com.np)
Date: 13th October, 2012
What is a fragment?
A fragment is, as the name suggests, a chunk of user interface with its own lifecycle which must exist within an activity.
Multiple fragments can be used in a single activity to form a multi-pane UI or reuse a fragment in multiple activities.
Advantages of fragments
• It can modularize a single activity into smaller units of UI, making it more flexible and easier to manage.
• A fragment can exist without a UI screen and act as an invisible worker for the activity.
• A fragment can be reused with multiple activities.
• A fragment lets us maintain a "back-stack" of its state.
Implementation in different screens
Implementations in paged layouts
Writing Fragment Layout
A fragment layout is similar to an activity layout.
Writing A Basic Fragment Class
Including Fragment Into Main Layout
Writing Main Activity Class
Fragment Types
ListFragment
DialogFragment
Custom Fragment (e.g Grid)
CompatibilityYou can download the compatibility package using the Android SDK Manager as shown below.
Compatibility (contd.)
To use the compatibility package, you must add it to your project and include in the build path.
This can be done by Right clicking your Android project-> Selecting Android Tools-> Add compatibility Library.
Resources
API Guide
http://developer.android.com/guide/components/fragments.html
Tutorials
https://github.com/posco2k8/fragment_basic_tutorial
https://github.com/posco2k8/fragment_tabs_tutorial
Examples
https://github.com/jrgleason/android-fragments-example
Thank You