优化

app/src/main/java/io/legado/app/ui/book/audio/AudioPlayActivity.kt

@@ -157,7 +157,11 @@ class AudioPlayActivity :
             AudioPlay.adjustSpeed(this@AudioPlayActivity, -0.1f)
         }
         binding.ivTimer.setOnClickListener {
-            timerViewState.value = true
+            if (AudioPlayService.isRun) {
+                timerViewState.value = true
+            } else {
+                toastOnUi(R.string.cannot_timed_non_playback)
+            }
         }
         binding.composeView.setContent {
             AppTheme {

app/src/main/res/values-es-rES/strings.xml

@@ -964,5 +964,6 @@
     <string name="scroll_to_dur_source">定位到当前书源</string>
     <string name="sys_tts_config">系统tts设置</string>
     <string name="sys_tts_config_summary">打开系统tts设置界面</string>
+    <string name="cannot_timed_non_playback">非播放状态无法定时</string>
     <!-- string end -->
 </resources>

app/src/main/res/values-ja-rJP/strings.xml

@@ -967,5 +967,6 @@
     <string name="scroll_to_dur_source">定位到当前书源</string>
     <string name="sys_tts_config">系统tts设置</string>
     <string name="sys_tts_config_summary">打开系统tts设置界面</string>
+    <string name="cannot_timed_non_playback">非播放状态无法定时</string>
     <!-- string end -->
 </resources>

app/src/main/res/values-pt-rBR/strings.xml

@@ -967,5 +967,6 @@
     <string name="scroll_to_dur_source">定位到当前书源</string>
     <string name="sys_tts_config">系统tts设置</string>
     <string name="sys_tts_config_summary">打开系统tts设置界面</string>
+    <string name="cannot_timed_non_playback">非播放状态无法定时</string>
     <!-- string end -->
 </resources>

app/src/main/res/values-zh-rHK/strings.xml

@@ -964,5 +964,6 @@
     <string name="scroll_to_dur_source">定位到当前书源</string>
     <string name="sys_tts_config">系统tts设置</string>
     <string name="sys_tts_config_summary">打开系统tts设置界面</string>
+    <string name="cannot_timed_non_playback">非播放状态无法定时</string>
     <!-- string end -->
 </resources>

app/src/main/res/values-zh-rTW/strings.xml

@@ -966,5 +966,6 @@
     <string name="scroll_to_dur_source">定位到目前書源</string>
     <string name="sys_tts_config">系统tts设置</string>
     <string name="sys_tts_config_summary">打开系统tts设置界面</string>
+    <string name="cannot_timed_non_playback">非播放状态无法定时</string>
     <!-- string end -->
 </resources>

app/src/main/res/values-zh/strings.xml

@@ -966,5 +966,6 @@
     <string name="scroll_to_dur_source">定位到当前书源</string>
     <string name="sys_tts_config">系统tts设置</string>
     <string name="sys_tts_config_summary">打开系统tts设置界面</string>
+    <string name="cannot_timed_non_playback">非播放状态无法定时</string>
     <!-- string end -->
 </resources>

app/src/main/res/values/strings.xml

@@ -967,5 +967,6 @@
     <string name="scroll_to_dur_source">定位到当前书源</string>
     <string name="sys_tts_config">系统tts设置</string>
     <string name="sys_tts_config_summary">打开系统tts设置界面</string>
+    <string name="cannot_timed_non_playback">非播放状态无法定时</string>
     <!-- string end -->
 </resources>