title: How to turn off the sound of App?
body: <p>I want to turn off the sound of a App , because I have a setting of sound , when I switch the sound to off , I want the App not play sound, My app is that:when I load a view and click someplace of it and should play some sound , and now I want to turn off the App sound when users turn off the switch of setting . because I didn't know how the audio play , and it is done by other way , and I want to know how to turn off the App audio by sdk code, How to do, thank you !</p>