restore
Restores existing instance of the dialog if exists.
Return
Existing dialog instance or null if not existing.
Parameters
fragment
The FragmentManager to use.
listener
The new SettingsDialog to use for the restored dialog instance
Restores existing instance of the dialog if exists.
Existing dialog instance or null if not existing.
The FragmentManager to use.
The new SettingsDialog to use for the restored dialog instance