优化

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

@@ -24,15 +24,16 @@ class HttpReadAloudService : BaseReadAloudService(),
     MediaPlayer.OnErrorListener,
     MediaPlayer.OnCompletionListener {
 
-    private val mediaPlayer by lazy { MediaPlayer() }
-    private lateinit var ttsFolder: String
+    private val mediaPlayer = MediaPlayer()
+    private val ttsFolder: String by lazy {
+        externalCacheDir!!.absolutePath + File.separator + "httpTTS"
+    }
     private var task: Coroutine<*>? = null
     private var playingIndex = -1
     private var playIndexJob: Job? = null
 
     override fun onCreate() {
         super.onCreate()
-        ttsFolder = externalCacheDir!!.absolutePath + File.separator + "httpTTS"
         mediaPlayer.setOnErrorListener(this)
         mediaPlayer.setOnPreparedListener(this)
         mediaPlayer.setOnCompletionListener(this)

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

@@ -147,11 +147,6 @@ class TTSReadAloudService : BaseReadAloudService(), TextToSpeech.OnInitListener
             }
         }
 
-        override fun onAudioAvailable(utteranceId: String?, audio: ByteArray?) {
-            super.onAudioAvailable(utteranceId, audio)
-
-        }
-
         override fun onError(s: String) {
             //nothing
         }