added in version 22.1.0
belongs to Maven artifact com.android.support:support-fragment:28.0.0-alpha1

FragmentManager.OnBackStackChangedListener

public static interface FragmentManager.OnBackStackChangedListener

android.support.v4.app.FragmentManager.OnBackStackChangedListener

Interface to watch for changes to the back stack.

Summary

Public methods
`abstract void`	`onBackStackChanged()` Called whenever the contents of the back stack change.

void onBackStackChanged ()

Called whenever the contents of the back stack change.