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- ANDROID STUDIO FRAGMENT MANAGER FROM FRAGMENT UPDATE
- ANDROID STUDIO FRAGMENT MANAGER FROM FRAGMENT ANDROID
- ANDROID STUDIO FRAGMENT MANAGER FROM FRAGMENT CODE
While we’re in the transaction, these changes will be queued up but not yet applied. We will then use the new FragmentTransaction instance to identify the desired changes to the list of displayed fragments within the activity. We will start a new FragmentTransaction instance by calling the beginTransaction method on the activity’s FragmentManager instance, which returns a reference to the FragmentTransaction instance. Start a new FragmentTransaction instance:
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Make sure, dynamic changes occur together as a single unit of work –> FragmentTransaction class helps.Ĭonceptually, the FragmentTransaction class behaves in a manner consistent with other transaction models:
ANDROID STUDIO FRAGMENT MANAGER FROM FRAGMENT ANDROID
Android does this by grouping the steps into transactions using the FragmentTransaction class. In any case, we need to be certain that all dynamic changes to the fragments within an activity that constitute a shift from one application screen to the next occur together as a single unit of work. The steps may be as simple as r emoving one fragment and adding another, or they may be more complex, involving the removal and addition of multiple fragments. The process of dynamically managing fragments commonly involves multiple steps. We can then dynamically manage the fragments within a single activity to change from one fragment to another. Rather than simply using fragments to manage logical subsections of the screen, we can also use them to manage logical groupings of an entire screen. We need to evolve our thinking about UI design a little further. Yet, as the application is currently written, we’re experiencing all of these things. If we recall, we learnt that one of the key values of fragments is that they help reduce unnecessary complications, activity proliferation, and logic duplication.
ANDROID STUDIO FRAGMENT MANAGER FROM FRAGMENT CODE
Also, we duplicated code in the activities because they both interact with the book description fragment.
ANDROID STUDIO FRAGMENT MANAGER FROM FRAGMENT UPDATE
We also increased the complexity of our application because the code to launch a new activity is more involved than the code we use to simply update a fragment within the same activity. That one detail caused us to add an extra activity to our application. The only difference is how much information we were able to display onscreen at one time. Surprisingly, in both cases our application performed the same task. The reason for this is that the two fragments do not appear onscreen at the same time we manage them in separate activities and each activity containing one fragment. However, in the case of a portrait-oriented handset, we chose to display the book list and the book description on separate screens.
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As both of these fragments appear onscreen at the same time, we display and manage them from a single activity. One fragment displays the list of book titles, and the other fragment displays the description of the currently selected book. In the case of a wide-display device( tablet devices), our application uses a single activity containing two fragments. We used fragments only to represent subsections within each screen.Įxample, let’s think back to the way we constructed our book browsing application. Until now, we’ve considered each activity to always correspond to a single screen in our application. The idea is to create interactive UIs that use fragments to dynamically change the appearance of the screen in response to user actions. monitoring user interaction with the back button.dynamically managing fragments within an activity,.
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