diff --git a/app/src/main/java/io/legado/app/App.kt b/app/src/main/java/io/legado/app/App.kt
index 580d2359f..64d4d9371 100644
--- a/app/src/main/java/io/legado/app/App.kt
+++ b/app/src/main/java/io/legado/app/App.kt
@@ -51,7 +51,7 @@ class App : Application() {
             .autoClear(false)
     }
 
-    fun initNightTheme() {
+    fun initNightTheme() {//对整个应用生效，不要手动调用recreate
         if (getPrefBoolean("isNightTheme")) {
             AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES)
         } else {
diff --git a/app/src/main/java/io/legado/app/ui/config/ThemeConfigFragment.kt b/app/src/main/java/io/legado/app/ui/config/ThemeConfigFragment.kt
index 0a727d354..2b709ec4b 100644
--- a/app/src/main/java/io/legado/app/ui/config/ThemeConfigFragment.kt
+++ b/app/src/main/java/io/legado/app/ui/config/ThemeConfigFragment.kt
@@ -7,8 +7,6 @@ import android.view.View
 import androidx.appcompat.app.AlertDialog
 import androidx.preference.Preference
 import androidx.preference.PreferenceFragmentCompat
-import com.jaredrummler.android.colorpicker.ColorPreferenceCompat
-import com.jeremyliao.liveeventbus.LiveEventBus
 import io.legado.app.App
 import io.legado.app.R
 import io.legado.app.constant.Bus
@@ -106,8 +104,6 @@ class ThemeConfigFragment : PreferenceFragmentCompat(), SharedPreferences.OnShar
                                 .putInt("colorBackgroundNight", App.INSTANCE.getCompatColor(R.color.md_grey_800))
                                 .apply()
                             App.INSTANCE.upThemeStore()
-                            LiveEventBus.get().with(Bus.RECREATE).post("")
-                            Handler().postDelayed({ activity?.recreate() }, 100)
                         }
                         .setNegativeButton(R.string.cancel, null)
                         .show().upTint()
@@ -138,8 +134,6 @@ class ThemeConfigFragment : PreferenceFragmentCompat(), SharedPreferences.OnShar
     private fun upTheme(isNightTheme: Boolean) {
         if (App.INSTANCE.getPrefBoolean("isNightTheme") == isNightTheme) {
             App.INSTANCE.upThemeStore()
-            LiveEventBus.get().with(Bus.RECREATE).post("")
-            Handler().postDelayed({ activity?.recreate() }, 100)
         }
     }
 
diff --git a/app/src/main/java/io/legado/app/ui/main/MainActivity.kt b/app/src/main/java/io/legado/app/ui/main/MainActivity.kt
index efe3c82a1..b92d71a03 100644
--- a/app/src/main/java/io/legado/app/ui/main/MainActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/main/MainActivity.kt
@@ -5,7 +5,6 @@ import android.view.MenuItem
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.FragmentManager
 import androidx.fragment.app.FragmentPagerAdapter
-import androidx.lifecycle.Observer
 import androidx.viewpager.widget.ViewPager
 import com.google.android.material.bottomnavigation.BottomNavigationView
 import io.legado.app.App
@@ -112,8 +111,8 @@ class MainActivity : BaseActivity<MainViewModel>(), BottomNavigationView.OnNavig
     }
 
     override fun observeLiveBus() {
-        observeEvent<String>(Bus.RECREATE, Observer {
+        observeEvent<String>(Bus.RECREATE) {
             recreate()
-        })
+        }
     }
 }
diff --git a/app/src/main/java/io/legado/app/utils/EventBusKt.kt b/app/src/main/java/io/legado/app/utils/EventBusKt.kt
index e4c505565..116540e75 100644
--- a/app/src/main/java/io/legado/app/utils/EventBusKt.kt
+++ b/app/src/main/java/io/legado/app/utils/EventBusKt.kt
@@ -13,18 +13,26 @@ inline fun <reified EVENT> postEvent(tag: String, event: EVENT) {
     return LiveEventBus.get().with(tag, EVENT::class.java).post(event)
 }
 
-inline fun <reified EVENT> AppCompatActivity.observeEvent(tag: String, observer: Observer<EVENT>) {
-    return eventObservable<EVENT>(tag).observe(this, observer)
+inline fun <reified EVENT> AppCompatActivity.observeEvent(tag: String, crossinline observer: (EVENT) -> Unit) {
+    return eventObservable<EVENT>(tag).observe(this, Observer {
+        observer(it)
+    })
 }
 
-inline fun <reified EVENT> AppCompatActivity.observeEventSticky(tag: String, observer: Observer<EVENT>) {
-    return eventObservable<EVENT>(tag).observeSticky(this, observer)
+inline fun <reified EVENT> AppCompatActivity.observeEventSticky(tag: String, crossinline observer: (EVENT) -> Unit) {
+    return eventObservable<EVENT>(tag).observeSticky(this, Observer {
+        observer(it)
+    })
 }
 
-inline fun <reified EVENT> Fragment.observeEvent(tag: String, observer: Observer<EVENT>) {
-    return eventObservable<EVENT>(tag).observe(this, observer)
+inline fun <reified EVENT> Fragment.observeEvent(tag: String, crossinline observer: (EVENT) -> Unit) {
+    return eventObservable<EVENT>(tag).observe(this, Observer {
+        observer(it)
+    })
 }
 
-inline fun <reified EVENT> Fragment.observeEventSticky(tag: String, observer: Observer<EVENT>) {
-    return eventObservable<EVENT>(tag).observeSticky(this, observer)
+inline fun <reified EVENT> Fragment.observeEventSticky(tag: String, crossinline observer: (EVENT) -> Unit) {
+    return eventObservable<EVENT>(tag).observeSticky(this, Observer {
+        observer(it)
+    })
 }
\ No newline at end of file