Question

 public boolean playing=false;
  private void prepareTTSEngine() {
        try {
            synthesis = SpeechSynthesis.getInstance(this);


            synthesis.setSpeechSynthesisEvent(new SpeechSynthesisEvent() {

                public void onPlaySuccessful() {
                    Log.i(TAG, "onPlaySuccessful");
                    playing=true;

                }

                public void onPlayStopped() {
                    Log.i(TAG, "onPlayStopped");
                    playing=false;

                }

                public void onPlayFailed(Exception e) {
                    Log.e(TAG, "onPlayFailed");
                    e.printStackTrace();
                    playing=false;
                }

                public void onPlayStart() {
                    Log.i(TAG, "onPlayStart");
                    //playing=true;

                }

                @Override
                public void onPlayCanceled() {
                    Log.i(TAG, "onPlayCanceled");
                    playing=false;
                }


            });

            //synthesis.setVoiceType("usenglishfemale1"); // All the values available to you can be found in the developer portal under your account

        } catch (InvalidApiKeyException e) {
            Log.e(TAG, "Invalid API key\n" + e.getStackTrace());
            Toast.makeText(_context, "ERROR: Invalid API key", Toast.LENGTH_LONG).show();
        }

    }

         prepareTTSEngine();
        String speech= MapLocationOverlay.mSelectedMapLocation.getShortDesc();
        synthesis.setVoiceType("usenglishfemale");

        BreakIterator iterator = BreakIterator.getSentenceInstance(Locale.US);
        iterator.setText(speech);
        int start = iterator.first();

        for (int end = iterator.next();end != BreakIterator.DONE; start = end, end = iterator.next()) {
            if(speech !=null && speech.substring(start,end).compareTo("")!=0)
            {
                String sentence_next=speech.substring(start,end);                   
                        //set ready flag to true (so isReady returns true) 


                while(playing==true)
                    try {
                        Thread.sleep(1000);
                    } catch (InterruptedException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                            try {
                                synthesis.speak(sentence_next);
                            } catch (BusyException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                            } catch (NoNetworkException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                            }


enter code here


            }
        }
    }

I'm using [the iSpeech library's SpeechSynthesis class](http://www.ispeech.org/androidsdkdoc/com/ispeech/SpeechSynthesis.html). When I call the说method in a表示循环，一次传递一个句子，所有句子一次开始。我想这是因为该方法是非阻塞的。它不是开源的，所以我看不出它是如何工作的。我怎样才能使它在前一句完成之前不会开始一个句子？

Answer 1

通常使用这些类型的库，代码不会等待声音停止播放（有充分理由）。

从documentation of your library开始，在阅读下一句话之前，您似乎应该使用SpeechSynthesisEvent倾听PLAY_SUCCESSFUL。

如果它符合您的需求，javax.speech.synthesis有一个相当简单的机制可以等到演讲完成后再查看：http://java.sun.com/products/java-media/speech/forDevelopers/jsapi-guide/Synthesis.html

如何让SpeechSynthesis.speak（String）阻止？

1 个答案: