diff --git a/app/src/main/java/io/legado/app/constant/Bus.kt b/app/src/main/java/io/legado/app/constant/Bus.kt
index 6d7c7b872..12e72949d 100644
--- a/app/src/main/java/io/legado/app/constant/Bus.kt
+++ b/app/src/main/java/io/legado/app/constant/Bus.kt
@@ -8,4 +8,5 @@ object Bus {
     const val TTS_RANGE_START = "readAloudNumber"
     const val BATTERY_CHANGED = "batteryChanged"
     const val TIME_CHANGED = "timeChanged"
+    const val READ_ALOUD = "readAloud"
 }
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/ui/readbook/ReadBookActivity.kt b/app/src/main/java/io/legado/app/ui/readbook/ReadBookActivity.kt
index 629a0bfeb..f0389a93e 100644
--- a/app/src/main/java/io/legado/app/ui/readbook/ReadBookActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/readbook/ReadBookActivity.kt
@@ -244,5 +244,8 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_rea
         observeEvent<Int>(Bus.ALOUD_STATE) { readAloudStatus = it }
         observeEvent<Int>(Bus.TTS_START) {}
         observeEvent<Int>(Bus.TTS_RANGE_START) {}
+        observeEvent<String>(Bus.TIME_CHANGED) {}
+        observeEvent<Int>(Bus.BATTERY_CHANGED) {}
+        observeEvent<String>(Bus.READ_ALOUD) { onClickReadAloud() }
     }
 }
\ No newline at end of file