android single activity multiple fragments
Use the download materials button at the top or bottom of this tutorial to download and extract the starter project. You ll find some resource files. You can combine multiple fragments in a single activity to build a multi pane ui and reuse a fragment in multiple activities.
Getting started with android fragments.
Android single activity multiple fragments. The fragment s view hierarchy becomes part of or attaches to the host s view hierarchy. Parent activity meta data to support api level 4 meta data android name android support parent activity android value com example app mainactivity activity for more information about declaring the parent activity to support up navigation read providing up navigation. Check out the project el dogo app. Now we can have a single activity but each activity can comprise of multiple fragments which will have their own layout events and complete life cycle.
Fragment class in android is used to build dynamic user interfaces fragment should be used within the activity. A fragment represents a behavior or a portion of user interface in an activity. Some android jetpack libraries such as navigation bottomnavigationview and viewpager2 are designed to work with fragments. This attribute was introduced in api level 16.
If you observe above example for tablet we defined an activity a with two fragments such as one is to show the list of items and second one is to show the details of item which we selected in first. Fragments cannot live on their own they must be hosted by an activity or another fragment. Following is a typical example of how two ui modules defined by fragments can be combined into one activity for a tablet design but separated for a handset design. Following is the example of defining a multiple fragments in single activity for the tablet design to display the details of an item which we selected in the app but separated for mobile design.
A greatest advantage of fragments is that it simplifies the task of creating ui for multiple screen sizes. In the welcome to android studio dialog select import project eclipse adt gradle etc.
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