fragment – Page 6 – Tarik Billa

‘setHasOptionsMenu(Boolean): Unit’ is deprecated. Deprecated in Java

February 27, 2023 by Tarik

From the Developer documentation, this can be achieved by the following: /** * Using the addMenuProvider() API directly in your Activity **/ class ExampleActivity : ComponentActivity(R.layout.activity_example) { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) // Add menu items without overriding methods in the Activity addMenuProvider(object : MenuProvider { override fun onCreateMenu(menu: Menu, menuInflater: MenuInflater) { // … Read more

Fragment inner class should be static

February 26, 2023 by Tarik

Non static inner classes do hold a reference to their parent classes. The problem with making a Fragment inner class non-static is that you always hold a reference to the Activity. The GarbageCollector cannot collect your Activity. So you can ‘leak’ the Activity if for example the orientation changes. Because the Fragment might still live … Read more

reusing fragments in a fragmentpageradapter

February 23, 2023 by Tarik

The FragmentPagerAdapter already caches the Fragments for you. Each fragment is assigned a tag, and then the FragmentPagerAdapter tries to call findFragmentByTag. It only calls getItem if the result from findFragmentByTag is null. So you shouldn’t have to cache the fragments yourself.

How to access Activity Variables from a fragment Android

February 15, 2023 by Tarik

Try this: public View onCreateView(…){ tabsmain xxx = (tabsmain)getActivity(); lc.setChecked(xxx.lf_ch); }

how to get a fragment added in an XML layout

February 15, 2023 by Tarik

You can get the fragment instance as follows: getSupportFragmentManager().findFragmentById(R.id.yourFragmentId)

Fragment vs. Custom View in Android

February 10, 2023 by Tarik

Fragment can be used in different scenarios but most used are: wrapper around a view headless fragment – i.e. no view => not very helpful in general but can be used retainable fragment – can be any of above. By using Fragment.setRetainInstance(true) you can bypass Fragment.onDestroy(), i.e. can keep fragment data on configuration changes but … Read more

If I declare a fragment in an XML layout, how do I pass it a Bundle?

February 5, 2023 by Tarik

Now that my Activity is just a wrapper around a Fragment that does the same work, how do I get that bundle to the Fragment if I declare the fragment in XML with the tag? You can’t. However, you are welcome to call findFragmentById() on your FragmentManager to retrieve the fragment post-inflation, then call some … Read more

How to dismiss a DialogFragment when pressing outside the dialog?

January 29, 2023 by Tarik

DialogFragment.getDialog().setCanceledOnTouchOutside(true); Must be called in onCreateView (as Apurv Gupta pointed out).

FragmentContainerView as NavHostFragment

January 21, 2023 by Tarik

Due to this bug-report: https://issuetracker.google.com/issues/142847973 This is the only way (currently): val navHostFragment = supportFragmentManager .findFragmentById(R.id.my_nav_host_fragment) as NavHostFragment val navController = navHostFragment.navController (Java): NavHostFragment navHostFragment = (NavHostFragment) getSupportFragmentManager() .findFragmentById(R.id.my_nav_host_fragment); NavController navController = navHostFragment.getNavController();

android.content.Context.getPackageName()’ on a null object reference

January 14, 2023 by Tarik

I have found the mistake what I did. We need to get the activity instance from the override method OnAttach() For example, public MainActivity activity; @Override public void onAttach(Activity activity){ this.activity = activity; } Then pass the activity as context as following. Intent mIntent = new Intent(activity, MusicHome.class);