android - Text to Speech API not calling setOnUtteranceCompletedListener -

what want:
want notified when texttospeech program has done speaking , want perform gui task when finishes speaking task.

what know:

setonutterancecompletedlistener can used call should notify me has findished speaking.it's depriciated in api level 15 still should work.

setonutteranceprogresslistener other , better way receive call backs starting finsishing , error notifications. minimum api level 15 required implement interface. changed minimum sdk version 15 , tried method didn't work me well.

here code

    public class speakingnotepad extends appcompatactivity  implements texttospeech.onutterancecompletedlistener{      button btnspeak;     edittext ettext;     texttospeech speaker;     speechrecognizer voicerecognizer;     @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_speaking_notepad);         init();     }      private void init() {         speaker = new texttospeech(this, new texttospeech.oninitlistener() {             @override             public void oninit(int status) {                 speaker.setlanguage(locale.english);             }         });         speaker.setonutterancecompletedlistener(this);         btnspeak = (button) findviewbyid(r.id.btnspeak);         btnspeak.setonclicklistener(new view.onclicklistener() {             @override             public void onclick(view v) {                 if(ettext.gettext().length()>0)                    speaker.speak(ettext.gettext().tostring(),texttospeech.queue_flush,null);             }         });         ettext = (edittext) findviewbyid(r.id.ettext);      }      @override     public void onutterancecompleted(string utteranceid) {         log.d("texttospeech","completed");         toast.maketext(this,"completed",toast.length_long).show();         btnspeak.setbackgroundcolor(color.black);     } } 

edit : use handler instead of runonuithread() method.

---

i recommend onutteranceprogresslistener because api has more method listen texttospeech's state changing.

however, if want use onutterancecompleted listener, edit below:

 public class speakingnotepad extends appcompatactivity  implements texttospeech.onutterancecompletedlistener{     private final string utter_id = "utterance";     private final int tts_done = 99;      button btnspeak;     edittext ettext;     texttospeech speaker;     speechrecognizer voicerecognizer;      hashmap<string, string> ttsoptions;     mainviewhandler g_hnd;      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);          g_hnd = new mainviewhandler(speakingnotepad.this);         init();     }      private void init() {         speaker = new texttospeech(this, new texttospeech.oninitlistener() {             @override             public void oninit(int status) {                 ttsoptions = new hashmap<string, string>();                 ttsoptions.put(texttospeech.engine.key_param_utterance_id, utter_id);                  speaker.setlanguage(locale.english);             }         });         speaker.setonutterancecompletedlistener(this);         btnspeak = (button) findviewbyid(r.id.btnspeak);         btnspeak.setonclicklistener(new view.onclicklistener() {             @override             public void onclick(view v) {                 if(ettext.gettext().length()>0) //                    speaker.speak(ettext.gettext().tostring(),texttospeech.queue_flush,null);                     speaker.speak(ettext.gettext().tostring(),texttospeech.queue_flush,ttsoptions);             }         });         ettext = (edittext) findviewbyid(r.id.ettext);     }      @override     public void onutterancecompleted(string utteranceid) {         if (utteranceid.equals(utter_id)) {             log.d("texttospeech", "completed");             /*             // more common usage, use `handler` instead of `runonuithread()`.             // block             runonuithread(new runnable() {                 @override                 public void run() {                     toast.maketext(speakingnotepad.this, "completed", toast.length_long).show();                     btnspeak.setbackgroundcolor(color.black);                 }             });             */              // then, call `sendmessage()`.             g_hnd.sendmessage(tts_done);         }     }      private static class mainviewhandler extends handler {         private final weakreference<speakingnotepad> mact;          mainviewhandler(speakingnotepad act) {             mact = new weakreference<speakingnotepad>(act);         }          public void handlemessage(message msg) {             speakingnotepad act = mact.get();             if (act != null) {                 act.handlemessage(msg)             }         }     }      private void handlemessage(message msg) {         switch(msg.what) {             case tts_done:                 toast.maketext(speakingnotepad.this, "completed", toast.length_long).show();                 btnspeak.setbackgroundcolor(color.black);                 break;         }     } }