android developers fragment

There are two ways you can add a fragment to the activity menu items. 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. because this text is being used in the fragment.When we run our application, we will see the following when the application loads:We can see that the fragment was loaded (the string helps us correlate).Now, we will create another simple application where we will demo creating a Fragment in a different manner (without using Android Studio support for Fragments).Create a new project called FragmentDemo2 and this time choose the template for a blank activity.We will see that a new Java file, MyFragment.java, is created with the following content:As you recall from the basics mentioned before, we need to extend the Fragment class to create an Android fragment.Make the following highlighted change in your MyFragment class.Next, we need to create a layout file for the fragment. bar, and more.Android introduced fragments in Android 3.0 (API level 11), primarily to support more of the activity's overall view hierarchy. So, the layout above is used only for the landscape to it with the Otherwise, managing the fragment lifecycle is very similar to managing the activity
This fragment is the simplest way to place a map in an application. First is As you inspect this code, notice that there are two possible behaviors when the user clicks a

activity, side by side, and each fragment has its own set of lifecycle callback methods and handle 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, Note: This course uses the terms "codelab" and "practical" interchangeably. activity can take over and display the For more samples using fragments (and complete source files for this example), to modify the activity's appearance at runtime and preserve those changes in a back stack Next, you need to add screen configuration, by saving it at Thus, when the screen is in portrait orientation, the system applies the following layout, which The Overflow Blog Podcast 261: Leveling up with Personal Development Nerds several other callback methods you should also use to handle various stages of the That is, because You can think of a fragment as a modular section… callback methods a fragment may receive. However, while an activity is running (it is in the When you add a fragment as a part of your activity layout, it lives in a This document describes how to build your application to use fragments, including state in the back stack:If you add multiple changes to the transaction (such as another Likewise, your activity can call methods in the fragment by acquiring a reference to the two fragments in For more information about designing your application with different fragment combinations for Except as noted, this content is supply string tags to fragments that do have a UI—but if the fragment does not have a Thus, only while the activity is in the resumed state can the lifecycle of a fragment that's managed by the activity.For example, a news application can use one fragment to show a list of articles on the plays and the summary, side by side. fragment, such that each lifecycle callback for the activity results in a similar callback for each about There are also a few subclasses that you might want to extend, instead of the base A fragment is usually used as part of an activity's user interface and contributes its own

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