However, we will be concentrating on one transaction method called add. The beginTransaction() method will get you the fragment transaction, and the Fragment Transaction will be providing methods like add, remove and replace to do the fragment transaction operations. FragmentTransaction : In the next step, we will use the fragment manager to get hold of Fragment transaction.FragmentManager : The first step is, using the activity we need to get hold of the Fragment manager ( use method from Activity to get FragmentManager).Simply using FragmentManager and FragmentTransaction API’s we can carry out fragment transaction. To get hold of it, you will be using another API called FragmentManager.
It will be having methods like add, remove and replace using which you will be adding Fragments to the activity.
ANDROID STUDIO FRAGMENT ANDROID
To do a fragment transaction Android provides an API called FragmentTransaction. All these three operations together called “Making a Fragment transaction” that is the standard terminology of Android. Replacing is nothing but first remove and then add a fragment. The significant steps associated with the fragment is:
ANDROID STUDIO FRAGMENT CODE
Writing code to add fragment is a multi-step process. Writing code to add Fragment to the Activity dynamically: The next step is writing code to add the fragment to an Activity, and we will be writing this code in an Activity.ĥ. The main_activity.xml file will look like this after the addition of placeholder.Īs you see, we added FrameLayout, and the only difference between static and dynamic is we have not referred to the fragment that it will host. I added Framelayout with some attributes in main_activity.xml which will be work as a placeholder. This is the most standard practice as far as the fragment is concerned. Here we will be using FrameLayout because it is designed in such a way that it will block a particular area on the screen for hosting a single UI widget. Place Holder can be anything like RelativeLayout with id, Linear Layout with id and Frame Layout with id. Instead of using fragment tag in Linear Layout, we have to use a PlaceHolder which can host a fragment, or we can say that we need a placeholder where the fragment will be added programmatically. Add a layout (placeholder) to the main XML that will host a Fragment.
ANDROID STUDIO FRAGMENT HOW TO
You can refer static method how to add those three stepsĤ. Set the layout file to the class which extends Fragment. Create a new Java class by extending Fragment.ģ. To do that we will have to modify certain things, but still, the first three steps are same as we do in the static method.ġ.Create another layout XML file for fragment.Ģ. Instead of using XML file we will be using Activity. however, Fragments don't need to be registered in the manifest file because fragments exist when embedded in an activity.Īdding Fragment Dynamically to activity: Now we will see how to add a fragment to the activity dynamically. If the activity destroys then the fragments in it will also destroy. It is possible to create a Fragment that doesn't include UI but instead provide background behaviour for an activity.įragments can be added or remove to the activity while activity is runningĪ fragment is reusable.i.e., multiple Activities can use it.įragments have lifecycle methods similar to activitiesĪ fragment life cycle is closely related to the activity lifecycle in which they are being used.
Like Activities, Fragments also have a separate layout by overriding onCreateView handler to inflate and return the required View hierarchy. To create a Fragment class, we need to create a new Extend Fragment class. We now see not just smartphones but other larger screens such as tablets and televisions that run in the Android platform. In this tutorial, we will learn about the basics of fragments and how they can be created.įragments: Fragments are added to the Android SDK at a crucial time when consumers were experiencing an explosion in the variety of Android devices coming to market.
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