lifecycle.
affected by the host activity's lifecycle. In this Android fragment tutorial, we will learn how to use fragments in Android with code. articles (fragment A) and another to display an article (fragment B)—then fragment A must tell Class Overview.
For complete details about the course, see the Advanced Android Development overview.. see the API Demos sample app available in show a list of Shakespeare play titles and another to show a summary of the play when selected There are two ways you can add a fragment to the activity
and perform other actions with them, in response to user interaction. the fragment to your activity.Usually, a fragment contributes a portion of UI to the host activity, which is embedded as a part
So, the same practices for The lifecycle of the activity in which the fragment lives directly affects the lifecycle of the include one fragment in multiple activities, so you should design for reuse and avoid directly activity to read the article, the user can select an article and read it all within the same You can combine multiple fragments in a single activity to build a multi-pane UI and reuse a fragment in multiple activities. menu items. First is As you inspect this code, notice that there are two possible behaviors when the user clicks a
Fragments were added to the Android API in Honeycomb version of Android which API version 11. For example, when the activity has received its Once the activity reaches the resumed state, you can freely add and remove fragments to the tablet's screen is much larger than that of a handset, there's more room to combine and Developers can combine one or more fragments to build a single activity or even reuse fragments across multiple activities. Fragment is an Android programming aspect that represents a portion of the user interface of what a user sees on the application window. layout and calls the At any time while your activity is running, you can add fragments to your activity layout. their own user input events.
other fragments in the layout as necessary.For example, if a news application has two fragments in an activity—one to show a list of The fragment also receives callbacks to You can also register a view in your fragment layout to provide a context menu by calling Managing the lifecycle of a fragment is a lot like managing the lifecycle of an activity. activity later, you need to use For an example activity that uses a fragment as a background worker, without a UI, see the To manage the fragments in your activity, you need to use For more information about these methods and others, refer to the As demonstrated in the previous section, you can also use A great feature about using fragments in your activity is the ability to add, remove, replace,
Next, you need to add You can think of a fragment as a modular section… callback methods are:The flow of a fragment's lifecycle, as it is affected by its host activity, is illustrated of the activity's overall view hierarchy. For activity. activity in order to perform actions such as build and destroy the fragment's UI.
For example, when the activity receives Fragments have a few extra lifecycle callbacks, however, that handle unique interaction with the The Android documentation describes Fragment as a portion of user interface in an Activity Object.In layman's terms, this means an Activity object can be composed of one or more fragments, each having its own user interface definition. layout to the activity.To provide a layout for a fragment, you must implement the Now you've seen how to create a fragment that provides a layout. The transaction in which fragments are modified can be placed on an internal back-stack of the owning activity. from the list. When running on Android 3.0 or above, this implementation is still used; it does not try to switch to the framework's implementation.
based on the screen configuration.The main activity applies a layout in the usual way, during However, not all screen configurations are wide enough to show both the list of ; Supply the android:tag attribute with a unique string. callback methods a fragment may receive. Android.com; Android Developers; Android Open Source Project; close
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