优化

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

@@ -1319,7 +1319,6 @@ class ReadBookActivity : BaseReadBookActivity(),
     }
 
     override fun observeLiveBus() = binding.run {
-        super.observeLiveBus()
         observeEvent<String>(EventBus.TIME_CHANGED) { readView.upTime() }
         observeEvent<Int>(EventBus.BATTERY_CHANGED) { readView.upBattery(it) }
         observeEvent<Boolean>(EventBus.MEDIA_BUTTON) {

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

@@ -135,6 +135,7 @@ class ReadView(context: Context, attrs: AttributeSet) :
         pageDelegate?.setViewSize(w, h)
         if (w > 0 && h > 0) {
             upBg()
+            callBack.upSystemUiVisibility()
         }
     }
 
@@ -656,5 +657,6 @@ class ReadView(context: Context, attrs: AttributeSet) :
         fun addBookmark()
         fun changeReplaceRuleState()
         fun openSearchActivity(searchWord: String?)
+        fun upSystemUiVisibility()
     }
 }