From 46f2db427c03e072e35eb49ce9f8242fb440d44c Mon Sep 17 00:00:00 2001
From: wen <alwjlola@gmail.com>
Date: Wed, 21 Apr 2021 10:43:22 +0800
Subject: [PATCH] fix Cannot setMaxLifecycle for Fragment not attached to
 FragmentManager

---
 .../java/androidx/navigation/fragment/FragmentNavigator.java    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/navigation-fragment/src/main/java/androidx/navigation/fragment/FragmentNavigator.java b/navigation-fragment/src/main/java/androidx/navigation/fragment/FragmentNavigator.java
index 7fcdedf..ca4d583 100644
--- a/navigation-fragment/src/main/java/androidx/navigation/fragment/FragmentNavigator.java
+++ b/navigation-fragment/src/main/java/androidx/navigation/fragment/FragmentNavigator.java
@@ -196,7 +196,7 @@ public void onAnimationRepeat(Animation animation) {
     }
 
     private void performPopBack(Fragment preFrag) {
-        if (preFrag != null) {
+        if (preFrag != null && !preFrag.isDetached()) {
             mFragmentManager.beginTransaction().setMaxLifecycle(preFrag, Lifecycle.State.RESUMED).commit();
         }
         mFragmentManager.popBackStack(