diff --git a/app/src/main/java/io/legado/app/ui/widget/anima/RotateLoading.kt b/app/src/main/java/io/legado/app/ui/widget/anima/RotateLoading.kt
index 13c4f346d..e587da788 100644
--- a/app/src/main/java/io/legado/app/ui/widget/anima/RotateLoading.kt
+++ b/app/src/main/java/io/legado/app/ui/widget/anima/RotateLoading.kt
@@ -18,9 +18,13 @@ import io.legado.app.utils.dp
  * Created by Victor on 2015/4/28.
  */
 @Suppress("MemberVisibilityCanBePrivate")
-class RotateLoading : View {
+class RotateLoading @JvmOverloads constructor(
+    context: Context,
+    attrs: AttributeSet? = null,
+    defStyleAttr: Int = 0
+) : View(context, attrs, defStyleAttr) {
 
-    private lateinit var mPaint: Paint
+    private var mPaint: Paint
 
     private var loadingRectF: RectF? = null
     private var shadowRectF: RectF? = null
@@ -55,19 +59,7 @@ class RotateLoading : View {
 
     private val hidden = Runnable { this.stopInternal() }
 
-    constructor(context: Context) : super(context) {
-        initView(context, null)
-    }
-
-    constructor(context: Context, attrs: AttributeSet) : super(context, attrs) {
-        initView(context, attrs)
-    }
-
-    constructor(context: Context, attrs: AttributeSet, defStyleAttr: Int) : super(context, attrs, defStyleAttr) {
-        initView(context, attrs)
-    }
-
-    private fun initView(context: Context, attrs: AttributeSet?) {
+    init {
         loadingColor = context.accentColor
         thisWidth = DEFAULT_WIDTH.dp
         shadowPosition = DEFAULT_SHADOW_POSITION.dp
diff --git a/app/src/main/java/io/legado/app/ui/widget/dynamiclayout/DynamicFrameLayout.kt b/app/src/main/java/io/legado/app/ui/widget/dynamiclayout/DynamicFrameLayout.kt
index 683cbc5d9..d3115bdc9 100644
--- a/app/src/main/java/io/legado/app/ui/widget/dynamiclayout/DynamicFrameLayout.kt
+++ b/app/src/main/java/io/legado/app/ui/widget/dynamiclayout/DynamicFrameLayout.kt
@@ -13,7 +13,10 @@ import io.legado.app.R
 import kotlinx.android.synthetic.main.view_dynamic.view.*
 
 @Suppress("unused")
-class DynamicFrameLayout(context: Context, attrs: AttributeSet?) : FrameLayout(context, attrs), ViewSwitcher {
+class DynamicFrameLayout @JvmOverloads constructor(
+    context: Context,
+    attrs: AttributeSet? = null
+) : FrameLayout(context, attrs), ViewSwitcher {
 
     private var errorView: View? = null
     private var errorImage: AppCompatImageView? = null
diff --git a/app/src/main/java/io/legado/app/ui/widget/image/CircleImageView.kt b/app/src/main/java/io/legado/app/ui/widget/image/CircleImageView.kt
index 2364deab7..f5781183e 100644
--- a/app/src/main/java/io/legado/app/ui/widget/image/CircleImageView.kt
+++ b/app/src/main/java/io/legado/app/ui/widget/image/CircleImageView.kt
@@ -25,8 +25,10 @@ import kotlin.math.min
 import kotlin.math.pow
 
 @Suppress("unused", "MemberVisibilityCanBePrivate")
-class CircleImageView(context: Context, attrs: AttributeSet) :
-    AppCompatImageView(context, attrs) {
+class CircleImageView @JvmOverloads constructor(
+    context: Context,
+    attrs: AttributeSet? = null
+) : AppCompatImageView(context, attrs) {
 
     private val mDrawableRect = RectF()
     private val mBorderRect = RectF()