一方面，这个问题很难解决，因为我在3款不同的Android 2.2手机上使用完全相同的代码完全，但是没有使用LG Optimus S（也运行Android 2.2）。
另一方面，这个问题是可以重现的，所以在解决这个谜团的道路上可能会有一些希望。
问题表明，传递给TTS引擎（Pico）的前两个文本段在所有手机上正确处理（并通过扬声器！），包括有问题的手机（LG Optimus S）。
但第三和第四段传递给TTS引擎，在语音识别控制器的识别步骤之后，导致所有手机中的完全良好的日志，除了有问题的手机没有听到任何声音通过扬声器！ - 尽管收到所有OnUtteranceCompleted（），即使是有问题的手机！
我知道代码是正确的，因为它可以在所有其他手机上完美运行，所以我很难过会导致这种情况。
这可能是CPU资源不足吗？内存资源不足？
如果是这样，为什么它适用于前两个文本段，但不适用于连续的两个文本段？
如果这有助于发现系统行为中出现“怪异”的东西，我会在有问题的手机上包含一个丢失TTS语音的示例logcat：
INFO/RecognitionController(1773): State change: RECOGNIZING -> RECOGNIZED
INFO/RecognitionController(1773): Final state: RECOGNIZED
INFO/ServerConnectorImpl(1773): ClientReport{session_id=040af29064d281350f1325c6a361f003,request_id=1,application_id=voice-search,client_perceived_request_status=0,request_ack_latency_ms=93,total_latency_ms=2179,user_perceived_latency_ms=213,network_type=1,endpoint_trigger_type=3,}
INFO/AudioService(121): AudioFocus abandonAudioFocus() from android.media.AudioManager@45a4f450
DEBUG/AppRecognizer(2167): Proceed.
INFO/TTS received:(2167): Speaking text segment number three but NOTHING is coming out of the speaker!!!
VERBOSE/TtsService(572): TTS service received Speaking text segment number three but NOTHING is coming out of the speaker!!!
VERBOSE/TtsService(572): TTS processing: Speaking text segment number three but NOTHING is coming out of the speaker!!!
VERBOSE/TtsService(572): TtsService.setLanguage(eng, USA, )
INFO/SVOX Pico Engine(572): Language already loaded (en-US == en-US)
INFO/SynthProxy(572): setting speech rate to 100
INFO/SynthProxy(572): setting pitch to 100
INFO/ClientReportSender(1773): Sending 1 client reports over HTTP
INFO/TTS received:(2167): Speaking text segment number four but NOTHING is coming out of the speaker!!!
VERBOSE/TtsService(572): TTS service received Speaking text segment number four but NOTHING is coming out of the speaker!!!
WARN/AudioTrack(572): obtainBuffer timed out (is the CPU pegged?) 0x5b3988 user=00062b40, server=00061b40
VERBOSE/TtsService(572): TTS callback: dispatch started
VERBOSE/TtsService(572): TTS callback: dispatch completed to 1
VERBOSE/TtsService(572): TTS processing: Speaking text segment number four but NOTHING is coming out of the speaker!!!
VERBOSE/onUtteranceCompleted(2167): segment #3
VERBOSE/TtsService(572): TtsService.setLanguage(eng, USA, )
INFO/SVOX Pico Engine(572): Language already loaded (en-US == en-US)
INFO/SynthProxy(572): setting speech rate to 100
INFO/SynthProxy(572): setting pitch to 100
WARN/AudioTrack(572): obtainBuffer timed out (is the CPU pegged?) 0x5b3988 user=0007dc00, server=0007cc00
VERBOSE/TtsService(572): TTS callback: dispatch started
VERBOSE/TtsService(572): TTS callback: dispatch completed to 1
VERBOSE/onUtteranceCompleted(2167): segment #4
完美运行的手机上的相应日志如下所示：
INFO/RecognitionController(1773): State change: RECOGNIZING -> RECOGNIZED
INFO/RecognitionController(1773): Final state: RECOGNIZED
INFO/ServerConnectorImpl(1773): ClientReport{session_id=040af29064d281350f1325c6a361f003,request_id=1,application_id=voice-search,client_perceived_request_status=0,request_ack_latency_ms=96,total_latency_ms=2449,user_perceived_latency_ms=140,network_type=1,endpoint_trigger_type=3,}
INFO/AudioService(121): AudioFocus abandonAudioFocus() from android.media.AudioManager@46039d08
DEBUG/AppRecognizer(2167): Proceed.
INFO/TTS received:(2167): Speaking text segment number three (and I can hear it :)
VERBOSE/TtsService(572): TTS service received Speaking text segment number three (and I can hear it :)
VERBOSE/TtsService(572): TTS processing: Speaking text segment number three (and I can hear it :)
INFO/ClientReportSender(1773): Sending 1 client reports over HTTP
VERBOSE/TtsService(572): TtsService.setLanguage(eng, USA, )
INFO/SVOX Pico Engine(572): TtsEngine::setLanguage found matching language(eng) but not matching country().
INFO/SVOX Pico Engine(572): Language already loaded (en-US == en-US)
INFO/SynthProxy(572): setting speech rate to 100
INFO/SynthProxy(572): setting pitch to 100
INFO/TTS received:(2167): Speaking text segment number four (and I can hear it :)
VERBOSE/TtsService(572): TTS service received Speaking text segment number four (and I can hear it :)
INFO/AudioHardwareQSD(121): AudioHardware pcm playback is going to standby.
DEBUG/dalvikvm(3262): GC_EXPLICIT freed 6946 objects / 326312 bytes in 76ms
WARN/AudioTrack(572): obtainBuffer timed out (is the CPU pegged?) 0x3ce730 user=00032e80, server=00031e80
WARN/AudioFlinger(121): write blocked for 170 msecs, 161 delayed writes, thread 0xdc08
VERBOSE/TtsService(572): TTS callback: dispatch started
VERBOSE/onUtteranceCompleted(2167): segment #3
VERBOSE/TtsService(572): TTS callback: dispatch completed to 1
VERBOSE/TtsService(572): TTS processing: Speaking text segment number four (and I can hear it :)
VERBOSE/TtsService(572): TtsService.setLanguage(eng, USA, )
INFO/SVOX Pico Engine(572): TtsEngine::setLanguage found matching language(eng) but not matching country().
INFO/SVOX Pico Engine(572): Language already loaded (en-US == en-US)
INFO/SynthProxy(572): setting speech rate to 100
INFO/SynthProxy(572): setting pitch to 100
WARN/KeyCharacterMap(2167): No keyboard for id 131074
WARN/KeyCharacterMap(2167): Using default keymap: /system/usr/keychars/qwerty.kcm.bin
DEBUG/dalvikvm(7137): GC_EXPLICIT freed 1585 objects / 93216 bytes in 67ms
DEBUG/dalvikvm(6697): GC_EXPLICIT freed 3108 objects / 178688 bytes in 59ms
VERBOSE/TtsService(572): TTS callback: dispatch started
VERBOSE/onUtteranceCompleted(2167): segment #4
更新I：问题（仅在LG Optimus S LS670中）仅在语音识别器首次启动后发生。我可以发送任意数量的文本段，其中一些非常长，并且TTS引擎可以完美地说出来。但是当手机进入收听的那一刻（当然不是在讲话的同时），TTS会停止响起。一旦语音识别器启动但是一旦语音识别完成就会自动发生某些说话者“静音”，就会自动发生。
我实际上已经开始尝试在audioManager.setMicrophoneMute(false);中插入RecognitionListener.onEndOfSpeech()，但这没有帮助。
更新II：我甚至尝试添加RecognitionListener.onEndOfSpeech()以下内容，认为重启TTS引擎可能会重置某个地方的错误 - 这也无济于事：
Intent checkIntent = new Intent();
checkIntent.setAction(TextToSpeech.Engine.ACTION_CHECK_TTS_DATA);
startActivityForResult(checkIntent, TTS_STATCHECK);
想法？建议？
答案 0 :(得分：1)
只需接受从Android 2.2.2（Froyo）到Android 2.3.3（Gingerbread）的OTA固件更新即可解决问题。
事实证明，这是操作系统中的一个错误，在特定ROM（LS670ZVD）中，而不是在我的代码中。