Which process is responsible for injecting KeyEvents to the system ?

by Dianne Hackborn » Thu, 30 Apr 2009 02:11:06 GMT


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 It's the core system process that implements the function.  You can't kill
it without bringing down the entire system.






-- 
Dianne Hackborn
Android framework engineer
hack...@android.com

Note: please don't send private questions to me, as I don't have time to
provide private support, and so won't reply to such e-mails.  All such
questions should be posted on public forums, where I and others can see and
answer them.

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Other Threads

1. How to play a audio resource on Hero?

These phones are killing me with exceptions while running the same
trivial code that works on other phones, in which I play a short mp3
file packed as a raw resource.  This is the only MediaPlayer use in my
app, so I am sure not exhausting any limits on number of such items.

Here is the code that works on most Android phones and not on at least
SOME Hero/Eris.
What can/should I be doing differently?

// often (always?) returns null on Hero/Eris when called from within
my app's main activity
MediaPlayer mp = MediaPlayer.create(this, resId);
mp.start(); // this will just crash on a Hero/Eris, as mp will be null

// ditto... returns null and I do not know why
mp = MediaPlayer.create(getBaseContext(), resId);

**I have no Hero or Eris on which to test**, and so further detail is
difficult to obtain.

I also tried the following code after some other dev opined that Hero/
Eris had trouble playing audio resources.  I copy the resource out to
a file and then just get another error.

mp = new MediaPlayer();
copyResourceToFile(resId, "foo.mp3");
mp.setDataSource(fname);
mp.prepare();   // fails on java.io.IOException: Prepare failed.:
status=0x1

Could this be an unsupported codec (it's a 4 second mp3 for crying out
loud, exported from Audacity)?  Should I try a PCM encoded wav file?

I would love some data from those who have actually done this on Hero/
Eris.  I suspect any "well, this should work" answers will fail just
as mine have.

tone

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2. Insert Content in MediaStore.Audio.Media.EXTERNAL_CONTENT_URI

Hello.

I get an error if I use this simple code:

       import android.provider.MediaStore.Audio.Media;
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map.
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        values.put(Media.DISPLAY_NAME, "road_trip_1");
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        values.put(Media.MIME_TYPE, "audio/mp3");

        // Add a new record without the bitmap, but with the values
just set.
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(Media.EXTERNAL_CONTENT_URI, values);

The error I get is on the last code line:
Writing exception to parcel
java.lang.NullPointerException
  at com.android.providers.media.MediaProvider.insertInternal
(MediaProvider.java:1286)
  at com.android.providers.media.MediaProvider.insert
(MediaProvider.java:1193)
(...)


But, when I insert a new image entry instead of an audio entry I get
no error!
(import android.provider.MediaStore.Images.Media; instead of
android.provider.MediaStore.Audio.Media; would work, but I need to
insert a audio file)

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