diff --git a/app/src/main/java/io/legado/app/lib/theme/ATH.kt b/app/src/main/java/io/legado/app/lib/theme/ATH.kt
index 512b2ffa7..c5d284064 100644
--- a/app/src/main/java/io/legado/app/lib/theme/ATH.kt
+++ b/app/src/main/java/io/legado/app/lib/theme/ATH.kt
@@ -100,6 +100,7 @@ object ATH {
         val color1: Int
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
             color1 = ColorUtils.stripAlpha(color)
+            @Suppress("DEPRECATION")
             activity.setTaskDescription(ActivityManager.TaskDescription(activity.title as String, null, color1))
         }
     }
diff --git a/app/src/main/java/io/legado/app/model/webbook/BookInfo.kt b/app/src/main/java/io/legado/app/model/webbook/BookInfo.kt
index 05dfc0fc6..1ad81cf11 100644
--- a/app/src/main/java/io/legado/app/model/webbook/BookInfo.kt
+++ b/app/src/main/java/io/legado/app/model/webbook/BookInfo.kt
@@ -37,12 +37,12 @@ object BookInfo {
         analyzeRule.getString(infoRule.name ?: "")?.let {
             if (it.isNotEmpty()) book.name = it
         }
-        SourceDebug.printLog(bookSource.bookSourceUrl, 1, book.name ?: "")
+        SourceDebug.printLog(bookSource.bookSourceUrl, 1, book.name)
         SourceDebug.printLog(bookSource.bookSourceUrl, 1, "获取作者")
         analyzeRule.getString(infoRule.author ?: "")?.let {
             if (it.isNotEmpty()) book.author = it
         }
-        SourceDebug.printLog(bookSource.bookSourceUrl, 1, book.author ?: "")
+        SourceDebug.printLog(bookSource.bookSourceUrl, 1, book.author)
         SourceDebug.printLog(bookSource.bookSourceUrl, 1, "获取分类")
         analyzeRule.getString(infoRule.kind ?: "")?.let {
             if (it.isNotEmpty()) book.kind = it
diff --git a/app/src/main/java/io/legado/app/receiver/MediaButtonReceiver.kt b/app/src/main/java/io/legado/app/receiver/MediaButtonReceiver.kt
index 796734c43..d64df95e2 100644
--- a/app/src/main/java/io/legado/app/receiver/MediaButtonReceiver.kt
+++ b/app/src/main/java/io/legado/app/receiver/MediaButtonReceiver.kt
@@ -46,7 +46,7 @@ class MediaButtonReceiver : BroadcastReceiver() {
         }
 
         private fun readAloud(context: Context) {
-            ActivityHelp.getInstance()?.isExist(ReadBookActivity::class.java)?.let {
+            ActivityHelp.getInstance().isExist(ReadBookActivity::class.java).let {
                 if (!it) {
                     context.startActivity<ReadBookActivity>()
                 }