To remove a fragment, you first need to get a reference to it. You can’t safely save fragment references as persistent fields, because those references will be lost during configuration changes. But you can find a current fragment in a couple of ways - by the id of the fragment’s container, or by a string you provide known as a “tag”.
- [Narrator] To remove a fragment from an activity,…you first need to get a reference to it.…Now, you can't safely save fragment references as…persistent fields, because those references can be…lost during configuration changes.…I'm going to demonstrate this in this project,…named remove with Java.…In this project activity layout, I've added…a second button, and I've labeled it remove.…Now I have two buttons, each with their…own unique click handlers.…The click handler for the remove button right now…doesn't have any code in it.…
Right now, in my on create method,…I'm returning the reference to my simple fragment object,…and saving it as a persistent field.…Then, I'm successfully adding the fragment at runtime.…I'm going to add a bit of code here…to the remove click handler method.…I'll add an if block, and my condition will be…if fragment isn't null.…Then, within the conditional block,…I'll call get support fragment manager,…then I'll be in a transaction, then I'll call remove,…and I'll pass in the fragment reference,…
Author
David Gassner
Released
9/1/2016- Configuring Android Studio
- Understanding fragments
- Creating a fragment class and layout
- Adding and removing fragments with Java
- Creating layouts for multiple screens
- Understanding arguments and callback methods
- Passing arguments to a fragment
- Choosing layout at runtime
- Displaying dialogs with fragments
- Using fragments for managing dialogs, shared preferences, and more
Skill Level Intermediate
Duration
Views
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Introduction
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Welcome1m 4s
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What you should know1m 50s
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Using the exercise files3m 44s
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1. Getting Started
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Understanding fragments3m 17s
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2. Display Fragments in Activities
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Display a fragment with XML3m 10s
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Add a fragment with Java3m 50s
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Remove a fragment with Java6m 12s
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3. Manage Fragments at Runtime
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Pass arguments to a fragment5m 18s
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Choose layout at runtime3m 21s
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4. Communication between Fragments and Activities
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5. Display Dialogs with Fragments
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Display a custom dialog5m 1s
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Pass arguments to the dialog4m 16s
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6. Other Uses of Fragments
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Create a ViewPager adapter4m 56s
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Conclusion
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Next steps1m 11s
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Video: Remove a fragment with Java