优化

app/src/main/java/io/legado/app/service/TTSReadAloudService.kt

@@ -8,11 +8,9 @@ import io.legado.app.constant.AppConst
 import io.legado.app.constant.EventBus
 import io.legado.app.help.AppConfig
 import io.legado.app.help.MediaHelp
+import io.legado.app.lib.dialogs.SelectItem
 import io.legado.app.model.ReadBook
-import io.legado.app.utils.getPrefBoolean
-import io.legado.app.utils.postEvent
-import io.legado.app.utils.servicePendingIntent
-import io.legado.app.utils.toastOnUi
+import io.legado.app.utils.*
 import java.util.*
 
 class TTSReadAloudService : BaseReadAloudService(), TextToSpeech.OnInitListener {
@@ -35,7 +33,12 @@ class TTSReadAloudService : BaseReadAloudService(), TextToSpeech.OnInitListener
     @Synchronized
     private fun initTts() {
         ttsInitFinish = false
-        textToSpeech = TextToSpeech(this, this)
+        val engine = GSON.fromJsonObject<SelectItem<String>>(AppConfig.ttsEngine)?.value
+        textToSpeech = if (engine.isNullOrBlank()) {
+            TextToSpeech(this, this)
+        } else {
+            TextToSpeech(this, this, engine)
+        }
     }
 
     @Synchronized

app/src/main/java/io/legado/app/utils/StringUtils.kt

@@ -245,7 +245,7 @@ object StringUtils {
      * 是否数字
      */
     fun isNumeric(str: String): Boolean {
-        val pattern = Pattern.compile("[0-9]+")
+        val pattern = Pattern.compile("-?[0-9]+")
         val isNum = pattern.matcher(str)
         return isNum.matches()
     }

app/src/main/res/xml/pref_config_aloud.xml

@@ -25,8 +25,8 @@
         <io.legado.app.ui.widget.prefs.Preference
             android:defaultValue="false"
             android:title="@string/speak_engine"
-            android:summary="本地TTS"
-            android:key="speakEngine"
+            android:summary="TTS"
+            android:key="appTtsEngine"
             app:iconSpaceReserved="false" />
 
     </io.legado.app.ui.widget.prefs.PreferenceCategory>