text to speech - Deal with multiple shot on TTS service -

i trying optimize code on text speech service. in code, possible multiple shots start tts service @ same time.

i hope service can catch texts these shots tts queue 1 one. please check code follows:

public class voiceservice extends service implements  texttospeech.oninitlistener, texttospeech.onutterancecompletedlistener {  private final string tag = "voiceservice";  private texttospeech mtts; private string messagetitle; private string messagecontext;  @override public void oncreate() {     log.i(tag, "oncreate");     try{         log.i(tag, "new texttospeech(this, this);");         mtts = new texttospeech(this, this);         mtts.setonutterancecompletedlistener(this);     }     catch(exception e){         log.i(tag, "exception e : " + e.tostring());         e.printstacktrace();     } }  @override public int onstartcommand(intent intent, int flags, int startid){     log.i(tag, "s of onstartcommand @ voiceservice");     messagetitle = "";     messagecontext = "";     // bug, intent totally null     if(intent == null) {         stopself();     }     // action in intent , ask stop service.     else if(intent.getaction() != null             && intent.getaction().equals("xxx.stop_tts")){         stopself();     }     // should start tts     else {         log.i(tag, "run tts");         if (intent.getstringextra("messagetitle") != null)             messagetitle = intent.getstringextra("messagetitle");         if (intent.getstringextra("messagecontext") != null)             messagecontext = intent.getstringextra("messagecontext");     }  //        return super.onstartcommand(intent, flags, startid);     return start_sticky; }  @override public void oninit(int status) {     log.i(tag, "oninit");     if (status == texttospeech.success) {         int result = mtts.setlanguage(locale.getdefault());         if (result != texttospeech.lang_missing_data                 && result != texttospeech.lang_not_supported                 && messagetitle.length() > 0                 ) {             log.i(tag, "add speech...");             hashmap<string,string> stringstringhashmap = new hashmap<string, string>();             stringstringhashmap.put(texttospeech.engine.key_param_utterance_id, "utterance_id");             mtts.speak(messagetitle, texttospeech.queue_add, null);             mtts.speak(messagecontext, texttospeech.queue_add, stringstringhashmap);         }     } }  @override public void onutterancecompleted(string uttid) {     log.i(tag, "onutterancecompleted");     stopself(); }  @override public void ondestroy() {     // text speech engine attached     if (mtts != null) {         mtts.stop();         mtts.shutdown();         mtts = null;     }     super.ondestroy(); }  @override public ibinder onbind(intent arg0) {     return null; } 

}

and result log 2 shots @ same time:

i/voiceservice: oncreate i/voiceservice: new texttospeech(this, this); i/texttospeech: sucessfully bound com.google.android.tts i/voiceservice: s of onstartcommand @ voiceservice i/voiceservice: run tts i/voiceservice: s of onstartcommand @ voiceservice i/voiceservice: run tts i/texttospeech: connected componentinfo{com.google.android.tts/com.google.android.tts.service.googlettsservice} i/texttospeech: set connection componentinfo{com.google.android.tts/com.google.android.tts.service.googlettsservice} i/voiceservice: oninit i/voiceservice: add speech... 

as can see, runs "add speech" once went "onstartcommand" twice. means ignored first shot.

i did work around, put add text code in "onstartcommand" , try ignore check (status == texttospeech.success) failed.

the log follows:

i/voiceservice: s of onstartcommand @ voiceservice i/voiceservice: run tts w/texttospeech: setlanguage failed: not bound tts engine i/texttospeech: connected componentinfo{com.google.android.tts/com.google.android.tts.service.googlettsservice} i/voiceservice: s of onstartcommand @ voiceservice i/voiceservice: run tts w/texttospeech: setlanguage failed: tts engine connection not set i/texttospeech: set connection componentinfo{com.google.android.tts/com.google.android.tts.service.googlettsservice} i/voiceservice: oninit 

if queue not starts in oninit(), "setlanguage failed" happens. wonder if have idea deal it. return value in onstartcommand() makes difference? i.e. start_sticky, start_flag_redelivery ?