Android: Detect another application has started pl

问题:

My music application constantly plays music in the background, however I'd like to be able to detect when another application starts playing audio (such as the YouTube app) so I can pause/mute/stop the audio in my application.

This will allow a user to continue browsing the web whilst listening to music, but then if they wish to watch a video at any point, they can do so without audio conflict.

One solution might be to listen for a broadcast which states when an application begins using the AudioManager. Does such an Intent Action exist?

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Edit: As in the answer provided below, there appears to be a method of detecting the loss of audio focus in 2.2 with AudioManager.OnAudioFocusChangeListener.

Great, but is there a solution for the more common versions of Android? Ideally 1.5+.

回答1:

http://developer.android.com/reference/android/media/AudioManager.OnAudioFocusChangeListener.html

this thread also has additional information that might get you heading in the right direction.

http://groups.google.com/group/android-developers/browse_thread/thread/db6822d84feaac6/219d8cba07795c61?hl=en&lnk=gst&q=OnAudioFocusChangeListener#219d8cba07795c61