diff --git a/app/src/main/java/io/legado/app/lib/theme/prefs/ATEColorPreference.kt b/app/src/main/java/io/legado/app/lib/theme/prefs/ATEColorPreference.kt
index 8e1ec7260..517ba8d68 100644
--- a/app/src/main/java/io/legado/app/lib/theme/prefs/ATEColorPreference.kt
+++ b/app/src/main/java/io/legado/app/lib/theme/prefs/ATEColorPreference.kt
@@ -15,7 +15,7 @@ import androidx.preference.PreferenceViewHolder
 import com.jaredrummler.android.colorpicker.*
 import io.legado.app.lib.theme.ATH
 
-class ATEColorPreference : Preference,
+class ATEColorPreference(context: Context, attrs: AttributeSet) : Preference(context, attrs),
     ColorPickerDialogListener {
 
     private val SIZE_NORMAL = 0
@@ -35,20 +35,7 @@ class ATEColorPreference : Preference,
     private var presets: IntArray? = null
     private var dialogTitle: Int = 0
 
-    constructor(context: Context, attrs: AttributeSet) : super(context, attrs) {
-        init(attrs)
-    }
-
-    constructor(context: Context, attrs: AttributeSet, defStyleAttr: Int, defStyleRes: Int) : super(
-        context,
-        attrs,
-        defStyleAttr,
-        defStyleRes
-    ) {
-        init(attrs)
-    }
-
-    private fun init(attrs: AttributeSet) {
+    init {
         isPersistent = true
         val a = context.obtainStyledAttributes(attrs, R.styleable.ColorPreference)
         showDialog = a.getBoolean(R.styleable.ColorPreference_cpv_showDialog, true)
diff --git a/app/src/main/java/io/legado/app/lib/theme/prefs/ATEPreferenceCategory.kt b/app/src/main/java/io/legado/app/lib/theme/prefs/ATEPreferenceCategory.kt
index 90a2abfe5..ba4363b15 100644
--- a/app/src/main/java/io/legado/app/lib/theme/prefs/ATEPreferenceCategory.kt
+++ b/app/src/main/java/io/legado/app/lib/theme/prefs/ATEPreferenceCategory.kt
@@ -1,10 +1,8 @@
 package io.legado.app.lib.theme.prefs
 
 import android.content.Context
-import android.os.Build
 import android.util.AttributeSet
 import android.widget.TextView
-import androidx.annotation.RequiresApi
 import androidx.preference.PreferenceCategory
 import androidx.preference.PreferenceViewHolder
 import io.legado.app.lib.theme.ThemeStore
@@ -12,17 +10,8 @@ import io.legado.app.lib.theme.ThemeStore
 
 class ATEPreferenceCategory : PreferenceCategory {
 
-    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
-    constructor(context: Context, attrs: AttributeSet, defStyleAttr: Int, defStyleRes: Int) :
-            super(context, attrs, defStyleAttr, defStyleRes)
-
-    constructor(context: Context, attrs: AttributeSet, defStyleAttr: Int) :
-            super(context, attrs, defStyleAttr)
-
     constructor(context: Context, attrs: AttributeSet) : super(context, attrs)
 
-    constructor(context: Context) : super(context)
-
     override fun onBindViewHolder(holder: PreferenceViewHolder?) {
         super.onBindViewHolder(holder)
         holder?.let {
diff --git a/app/src/main/java/io/legado/app/lib/theme/prefs/ATESwitchPreference.kt b/app/src/main/java/io/legado/app/lib/theme/prefs/ATESwitchPreference.kt
index 2ff1c9c05..998865a7f 100644
--- a/app/src/main/java/io/legado/app/lib/theme/prefs/ATESwitchPreference.kt
+++ b/app/src/main/java/io/legado/app/lib/theme/prefs/ATESwitchPreference.kt
@@ -1,9 +1,7 @@
 package io.legado.app.lib.theme.prefs
 
 import android.content.Context
-import android.os.Build
 import android.util.AttributeSet
-import androidx.annotation.RequiresApi
 import androidx.appcompat.widget.SwitchCompat
 import androidx.preference.PreferenceViewHolder
 import androidx.preference.SwitchPreferenceCompat
@@ -11,21 +9,8 @@ import io.legado.app.R
 import io.legado.app.lib.theme.ATH
 import io.legado.app.lib.theme.ThemeStore
 
-class ATESwitchPreference : SwitchPreferenceCompat {
-
-    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
-    constructor(context: Context, attrs: AttributeSet, defStyleAttr: Int, defStyleRes: Int) : super(
-        context,
-        attrs,
-        defStyleAttr,
-        defStyleRes
-    )
-
-    constructor(context: Context, attrs: AttributeSet, defStyleAttr: Int) : super(context, attrs, defStyleAttr)
-
-    constructor(context: Context, attrs: AttributeSet) : super(context, attrs)
-
-    constructor(context: Context) : super(context)
+class ATESwitchPreference(context: Context, attrs: AttributeSet) :
+    SwitchPreferenceCompat(context, attrs) {
 
     override fun onBindViewHolder(holder: PreferenceViewHolder?) {
         super.onBindViewHolder(holder)