问题
I noticed that as soon as a voice recognition activity starts, text-to-speech output stops.
I understand the rational: TTS output could be "heard" by the voice recognition engine and interfere with its proper operation.
My question: Is this behavior hard-coded into the system, or can it be modified by a setting or parameter (in the API)?
回答1:
Must the activity simultaneously use recognition and TTS? If the recognition can wait (functionally speaking), force the event to spawn the RecognizerIntent only onUtteranceCompleted
This is pure speculation, but there must be some common feature that can only be used by TTS and recognition one at a time (both apis come from android.speech.*)
来源：https://stackoverflow.com/questions/5480573/tts-and-speech-input-simultaneously