fix-empty-tts-text (#4199)

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

@@ -93,8 +93,18 @@ class TTSReadAloudService : BaseReadAloudService(), TextToSpeech.OnInitListener
             LogUtils.d(TAG, "朗读列表大小 ${contentList.size}")
             LogUtils.d(TAG, "朗读页数 ${textChapter?.pageSize}")
             val tts = textToSpeech ?: throw NoStackTraceException("tts is null")
-            var result = tts.runCatching {
+            for (i in nowSpeak until contentList.size) {
-                speak("", TextToSpeech.QUEUE_FLUSH, null, null)
+                var text = contentList[i]
+                ensureActive()
+                if (paragraphStartPos > 0 && i == nowSpeak) {
+                    text = text.substring(paragraphStartPos)
+                }
+                if (text.matches(AppPattern.notReadAloudRegex)) {
+                    continue
+                }
+                if (i == nowSpeak) {
+                    val result = tts.runCatching {
+                        speak(text, TextToSpeech.QUEUE_FLUSH, null, AppConst.APP_TAG + i)
                     }.getOrElse {
                         AppLog.put("tts出错\n${it.localizedMessage}", it, true)
                         TextToSpeech.ERROR
@@ -105,17 +115,8 @@ class TTSReadAloudService : BaseReadAloudService(), TextToSpeech.OnInitListener
                         initTts()
                         return@execute
                     }
-            val contentList = contentList
+                } else {
-            for (i in nowSpeak until contentList.size) {
+                    val result = tts.runCatching {
-                ensureActive()
-                var text = contentList[i]
-                if (paragraphStartPos > 0 && i == nowSpeak) {
-                    text = text.substring(paragraphStartPos)
-                }
-                if (text.matches(AppPattern.notReadAloudRegex)) {
-                    continue
-                }
-                result = tts.runCatching {
                         speak(text, TextToSpeech.QUEUE_ADD, null, AppConst.APP_TAG + i)
                     }.getOrElse {
                         AppLog.put("tts出错\n${it.localizedMessage}", it, true)
@@ -125,6 +126,9 @@ class TTSReadAloudService : BaseReadAloudService(), TextToSpeech.OnInitListener
                         AppLog.put("tts朗读出错:$text")
                     }
                 }
+
+
+            }
             LogUtils.d(TAG, "朗读内容添加完成")
         }.onError {
             AppLog.put("tts朗读出错\n${it.localizedMessage}", it, true)