onSupportNavigateUp

This method is called whenever the user chooses to navigate Up within your application's activity hierarchy from the action bar.

If a parent was specified in the manifest for this activity or an activity-alias to it, default Up navigation will be handled automatically. See getSupportParentActivityIntent for how to specify the parent. If any activity along the parent chain requires extra Intent arguments, the Activity subclass should override the method onPrepareSupportNavigateUpTaskStack to supply those arguments.

See Tasks and Back Stack from the developer guide and Navigation from the design guide for more information about navigating within your app.

See the androidx.core.app.TaskStackBuilder class and the Activity methods getSupportParentActivityIntent, supportShouldUpRecreateTask, and supportNavigateUpTo for help implementing custom Up navigation.