I was just wondering if you could try to use setDataSource again before making a call to prepareAsync.. not sure if that is the problem as i have not seen the complete code.. but you could try..
Thanks, Prajakta On Fri, Sep 17, 2010 at 7:42 PM, Jason <[email protected]> wrote: > Anyone?.. Bueller... > > On Sep 18, 5:20 am, Jason <[email protected]> wrote: > > Hi all, > > > > I'm running into some state problems with MediaPlayer. I have so far > > only seen this on one device (HTC Hero) running Android 1.5. Stack > > trace is: > > > > java.lang.IllegalStateException > > at android.media.MediaPlayer.prepareAsync(Native Method) > > at > > com.carboncrystal.ro.audio.SafeMediaPlayer.prepareAsync(Unknown > > Source) > > at com.carboncrystal.ro.audio.a.a(Unknown Source) > > at > > com.carboncrystal.ro.audio.SafeOnCompletionListener.onCompletion(Unknown > > Source) > > > > Now that's all pretty meaningless I know, but here's the relevant > > code: > > > > public void onCompletion(MediaPlayer mp) { > > mp.stop(); > > mp.prepareAsync(); > > } > > > > The "SafeMediaPlayer" referred to above is just my hack to track down > > where the problem was (it's on a phone used by a friend in another > > country, so difficult to monitor). > > > > So basically the story is this: > > > > In an effort to avoid reloading audio every time its used, I am > > reusing the same MediaPlayer instance over and over. In most cases, I > > don't explicitly call "stop()" because most of the sounds are short > > (sound effects that just wont squeeze into the tiny SoundPool cache).. > > so I'm using an OnCompletionListener to let me know when the sound has > > finished so I can prepare it for the next use. > > > > Now.. according to the doco: > > > > "Calling stop() stops playback and causes a MediaPlayer in the > > Started, Paused, Prepared or PlaybackCompleted state to enter the > > Stopped state. > > Once in the Stopped state, playback cannot be started until prepare() > > or prepareAsync() are called to set the MediaPlayer object to the > > Prepared state again." > > > > So ok, according to this I should be fine.. but it's a little unclear > > to me from the state transition diagram (http://developer.android.com/ > > reference/android/media/MediaPlayer.html) whether the MediaPlayer > > enters the PlaybackCompleted before or after the call is made to > > onCompletion in the OnCompletionListener. > > > > It sort of seems that when onCompletion is called, the MediaPlayer is > > already in a Stopped state. But who cares right.. calling stop() in a > > stopped state should do nothing as it's a valid state. > > > > Interestingly I don't always see the failure.. which tells me it may > > be a timing thing. In either case, does anyone have any relevant > > experience with this? > > > > Maybe there's a call to start() sneaking in between the call to stop() > > and the call to prepareAsync() from another thread.. then again, I > > would have thought this would give me a failure on the call to > > start().. unless of course it is in a PlaybackCompleted state... > > urgh.. my head hurts. > > > > Thanks. > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected]<android-developers%[email protected]> > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
