[修复] 漫画模式时，某章节仅一页时的崩溃问题 #494

app/src/main/java/io/legado/app/ui/book/read/MangaMenu.kt

@@ -259,12 +259,20 @@ class MangaMenu @JvmOverloads constructor(
 
     fun upSeekBar(value: Int, count: Int) {
         binding.seekReadPage.apply {
+            if (count <= 1) {
+                isEnabled = false
+                valueFrom = 1f
+                valueTo = 2f
+                this.value = 1f
+            } else {
+                isEnabled = true
                 valueFrom = 1f
                 valueTo = count.toFloat()
                 stepSize = 1f
                 this.value = value.toFloat().coerceIn(valueFrom, valueTo)
             }
         }
+    }
 
     interface CallBack {
         fun openBookInfoActivity()