diff --git a/app/src/main/java/com/lt2333/simplicitytools/hook/app/settings/ShowNotificationImportance.kt b/app/src/main/java/com/lt2333/simplicitytools/hook/app/settings/ShowNotificationImportance.kt
index 352cc548..cc1a9faa 100644
--- a/app/src/main/java/com/lt2333/simplicitytools/hook/app/settings/ShowNotificationImportance.kt
+++ b/app/src/main/java/com/lt2333/simplicitytools/hook/app/settings/ShowNotificationImportance.kt
@@ -1,73 +1,73 @@
 package com.lt2333.simplicitytools.hook.app.settings
 
 import android.app.NotificationChannel
-import com.lt2333.simplicitytools.util.XSPUtils
+import com.lt2333.simplicitytools.util.*
 import de.robv.android.xposed.IXposedHookLoadPackage
 import de.robv.android.xposed.XC_MethodHook
 import de.robv.android.xposed.XposedHelpers
 import de.robv.android.xposed.callbacks.XC_LoadPackage
 
-class ShowNotificationImportance: IXposedHookLoadPackage {
+class ShowNotificationImportance : IXposedHookLoadPackage {
     override fun handleLoadPackage(lpparam: XC_LoadPackage.LoadPackageParam) {
-        if (!XSPUtils.getBoolean("show_notification_importance", false)) return
-
         val channelNotificationSettingsClass = XposedHelpers.findClass(
             "com.android.settings.notification.ChannelNotificationSettings",
             lpparam.classLoader
         )
 
-        XposedHelpers.findAndHookMethod(channelNotificationSettingsClass, "removeDefaultPrefs",
+        channelNotificationSettingsClass.hookMethod("removeDefaultPrefs",
             object : XC_MethodHook() {
-            override fun beforeHookedMethod(param: MethodHookParam) {
-                val importance =
-                    XposedHelpers.callMethod(param.thisObject, "findPreference", "importance")
-                val mChannel =
-                    XposedHelpers.getObjectField(param.thisObject, "mChannel") as NotificationChannel
-                val index = XposedHelpers.callMethod(
-                    importance,
-                    "findSpinnerIndexOfValue",
-                    mChannel.importance.toString()
-                ) as Int
-                if (index < 0) return@beforeHookedMethod
+                override fun beforeHookedMethod(param: MethodHookParam) {
+                    if (!XSPUtils.getBoolean("show_notification_importance", false)) return
 
-                XposedHelpers.callMethod(importance, "setValueIndex", index)
+                    val importance =
+                        param.thisObject.callMethod("findPreference", "importance") ?: return
+                    val mChannel =
+                        param.thisObject.getObjectField("mChannel") as NotificationChannel
+                    val index = importance.callMethod(
+                        "findSpinnerIndexOfValue",
+                        mChannel.importance.toString()
+                    ) as Int
+                    if (index < 0) return
 
-                XposedHelpers.setAdditionalInstanceField(
-                    importance,
-                    "channelNotificationSettings",
-                    param.thisObject
-                )
+                    importance.callMethod("setValueIndex", index)
 
-                param.result = null
-            }
-        })
+                    XposedHelpers.setAdditionalInstanceField(
+                        importance,
+                        "channelNotificationSettings",
+                        param.thisObject
+                    )
+
+                    param.result = null
+                }
+            })
 
         val dropDownPreferenceClass = XposedHelpers.findClass(
             "androidx.preference.Preference",
             lpparam.classLoader
         )
 
-        XposedHelpers.findAndHookMethod(dropDownPreferenceClass, "callChangeListener",
+        dropDownPreferenceClass.hookMethod("callChangeListener",
             Any::class.java, object : XC_MethodHook() {
-            override fun afterHookedMethod(param: MethodHookParam) {
-                val channelNotificationSettings = XposedHelpers.getAdditionalInstanceField(
-                    param.thisObject,
-                    "channelNotificationSettings"
-                )
-                    ?: return@afterHookedMethod
+                override fun afterHookedMethod(param: MethodHookParam) {
+                    val channelNotificationSettings = XposedHelpers.getAdditionalInstanceField(
+                        param.thisObject,
+                        "channelNotificationSettings"
+                    ) ?: return@afterHookedMethod
 
-                val mChannel = XposedHelpers.getObjectField(
-                    channelNotificationSettings,
-                    "mChannel"
-                ) as NotificationChannel
-                XposedHelpers.callMethod(mChannel, "setImportance", (param.args[0] as String).toInt())
+                    val mChannel = XposedHelpers.getObjectField(
+                        channelNotificationSettings,
+                        "mChannel"
+                    ) as NotificationChannel
 
-                val mBackend = XposedHelpers.getObjectField(channelNotificationSettings, "mBackend")
-                val mPkg =
-                    XposedHelpers.getObjectField(channelNotificationSettings, "mPkg") as String
-                val mUid = XposedHelpers.getObjectField(channelNotificationSettings, "mUid") as Int
-                XposedHelpers.callMethod(mBackend, "updateChannel", mPkg, mUid, mChannel)
-            }
-        })
+                    mChannel.callMethod(
+                        "setImportance", (param.args[0] as String).toInt()
+                    )
+
+                    val mBackend = channelNotificationSettings.getObjectField("mBackend") ?: return
+                    val mPkg = channelNotificationSettings.getObjectField("mPkg") as String
+                    val mUid = channelNotificationSettings.getIntField("mUid")
+                    mBackend.callMethod("updateChannel", mPkg, mUid, mChannel)
+                }
+            })
     }
 }
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