From fab44fabea3cafe094374e4244746606a2ce3b33 Mon Sep 17 00:00:00 2001
From: fansan <fansan@live.com>
Date: Wed, 17 Jun 2026 23:56:45 +0800
Subject: [PATCH] =?UTF-8?q?fix=EF=BC=9Anav=E9=AB=98=E5=BA=A6=E8=8E=B7?=
 =?UTF-8?q?=E5=8F=96=E8=BE=B9=E7=95=8C=E9=97=AE=E9=A2=98=E4=BF=AE=E6=94=B9?=
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---
 .../io/legado/app/ui/book/read/ReadBookMenuBar.kt   | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/app/src/main/java/io/legado/app/ui/book/read/ReadBookMenuBar.kt b/app/src/main/java/io/legado/app/ui/book/read/ReadBookMenuBar.kt
index 8781da182..746b18450 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/ReadBookMenuBar.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/ReadBookMenuBar.kt
@@ -6,10 +6,8 @@ import androidx.compose.animation.AnimatedContent
 import androidx.compose.animation.AnimatedVisibility
 import androidx.compose.animation.SizeTransform
 import androidx.compose.animation.animateContentSize
-import androidx.compose.animation.core.LinearOutSlowInEasing
 import androidx.compose.animation.core.animateDpAsState
 import androidx.compose.animation.core.animateFloatAsState
-import androidx.compose.animation.core.tween
 import androidx.compose.animation.fadeIn
 import androidx.compose.animation.fadeOut
 import androidx.compose.animation.slideInHorizontally
@@ -73,6 +71,7 @@ import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.SideEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableFloatStateOf
 import androidx.compose.runtime.mutableIntStateOf
@@ -413,11 +412,13 @@ private fun ReadBookMenuSurface(
     }
     val isFloating = state.menuConfig.readMenuFloatingBottomBar
     val currentNavBarHeight = with(density) { WindowInsets.navigationBars.getBottom(this).toDp() }
-    var maxNavBarHeightValue by rememberSaveable { mutableFloatStateOf(0f) }
-    if (currentNavBarHeight.value > maxNavBarHeightValue) {
-        maxNavBarHeightValue = currentNavBarHeight.value
+    var lastValidNavBarHeightValue by rememberSaveable { mutableFloatStateOf(currentNavBarHeight.value) }
+    SideEffect {
+        if (currentNavBarHeight.value > 0f) {
+            lastValidNavBarHeightValue = currentNavBarHeight.value
+        }
     }
-    val navBarHeight = if (currentNavBarHeight.value > 0f) currentNavBarHeight else maxNavBarHeightValue.dp
+    val navBarHeight = if (currentNavBarHeight.value > 0f) currentNavBarHeight else lastValidNavBarHeightValue.dp
     val floatingHorizontalMargin = if (isFloating) 16.dp else 0.dp
     val floatingBottomMargin = if (isFloating) 16.dp + navBarHeight else 0.dp
     val mainHorizontalMargin =