I am trying to follow single activity pattern with android navigation component and my %99 of fragment are portrait but I need to make a new fragment can be portrait or landscape without adding new activity how can I achieve. I could't find any resource. is it possible ? if it is how ?
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Try this developer.android.com/codelabs/android-navigation#1 code labs tutorialsPraveen– Praveen2022-04-10 19:13:31 +00:00Commented Apr 10, 2022 at 19:13
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it's say nothing about orientationHakan Mutlu– Hakan Mutlu2022-04-10 20:25:13 +00:00Commented Apr 10, 2022 at 20:25
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2 Answers
You can add NavController.OnDestinationChangedListener and set orientation according to the current fragment.
Add this in your activity's onCreate:
val navHostFragment = supportFragmentManager.findFragmentById(R.id.your_nav_host_fragment) as NavHostFragment
navHostFragment.navController..addOnDestinationChangedListener { _, destination, _ ->
if (destination.id == R.id.destination_with_orientation) {
requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_SENSOR
} else {
requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT
}
}
Comments
The following steps could be useful for you:
Don't lock screen orientation from
AndroidManifest.xml.Register a listener inside
Activityon thechildFragmentManagerof theNavHostFragment, that will execute callbacks on fragment lifecycle change
override fun onCreate(savedInstanceState: Bundle?) {
//...
val fragments = supportFragmentManager.fragments
check(fragments.size == 1) {
val baseMessage = "Expected 1 fragment to host the app's navigation. Instead found ${fragments.size}."
if (fragments.size == 0) {
val suggestion = "(Make sure you specify `android:name=\"androidx.navigation.fragment." +
"NavHostFragment\"` or override setUpNavigationGraph)"
"$baseMessage $suggestion"
} else baseMessage
}
with(fragments[0].childFragmentManager) {
registerFragmentLifecycleCallbacks(CustomFragmentLifecycleCallbacks(), false)
}
}
private inner class CustomFragmentLifecycleCallbacks : FragmentManager.FragmentLifecycleCallbacks() {
override fun onFragmentViewCreated(fm: FragmentManager, f: Fragment, v: View, savedInstanceState: Bundle?) {}
override fun onFragmentViewDestroyed(fm: FragmentManager, f: Fragment) {}
}
- Follow this guide to lock/unlock screen orientation depending upon which
Fragmentis visible, from the above callback.
NOTE
Fragment tags or instance type could be used for writing conditional statements inside the lifecycle callbacks, based on app's navigation design.
Don't forget to unregisterFragmentLifecycleCallbacks from Activity.onDestroy()
Cheers 🍻
