diff --git a/app/src/main/java/io/legado/app/help/ActivityHelp.kt b/app/src/main/java/io/legado/app/help/ActivityHelp.kt
index ca7c20f5f..6138c0c7e 100644
--- a/app/src/main/java/io/legado/app/help/ActivityHelp.kt
+++ b/app/src/main/java/io/legado/app/help/ActivityHelp.kt
@@ -19,7 +19,7 @@ object ActivityHelp {
      * 判断指定Activity是否存在
      */
     fun isExist(activityClass: Class<*>): Boolean {
-        for (item in activities) {
+        activities.forEach { item ->
             if (item.get()?.javaClass == activityClass) {
                 return true
             }
@@ -63,7 +63,7 @@ object ActivityHelp {
      * 关闭指定 activity
      */
     fun finishActivity(vararg activities: Activity) {
-        for (activity in activities) {
+        activities.forEach { activity ->
             activity.finish()
         }
     }
@@ -81,8 +81,8 @@ object ActivityHelp {
                 }
             }
         }
-        for (activityWeakReference in waitFinish) {
-            activityWeakReference.get()?.finish()
+        waitFinish.forEach {
+            it.get()?.finish()
         }
     }
 
diff --git a/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt b/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt
index 430aea351..7d7ef8c67 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt
@@ -496,6 +496,9 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_boo
         }
     }
 
+    /**
+     * colorSelectDialog
+     */
     override fun onColorSelected(dialogId: Int, color: Int) = with(ReadBookConfig.getConfig()) {
         when (dialogId) {
             TEXT_COLOR -> {
diff --git a/app/src/main/java/io/legado/app/ui/welcome/WelcomeActivity.kt b/app/src/main/java/io/legado/app/ui/welcome/WelcomeActivity.kt
index 721257bf5..4a1e12f82 100644
--- a/app/src/main/java/io/legado/app/ui/welcome/WelcomeActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/welcome/WelcomeActivity.kt
@@ -30,10 +30,9 @@ class WelcomeActivity : BaseActivity(R.layout.activity_welcome) {
         }
         welAnimator.addListener(object : Animator.AnimatorListener {
             override fun onAnimationStart(animation: Animator) {
+                startActivity<MainActivity>()
                 if (getPrefBoolean(getString(R.string.pk_default_read))) {
                     startActivity<ReadBookActivity>()
-                } else {
-                    startActivity<MainActivity>()
                 }
                 finish()
             }