ACTION_MEDIA_BUTTON does not work on real device

Question

Hi

I'm writing an Android app to auto-answer incoming calls. I am using a receiver, and trying to send ACTION_MEDIA_BUTTON event when the phone rings.

It all works great on the emulator - When the phone rings it actually answers the call automatically.

But when I'm trying it on the device it-self it just does not work (HTC Legend).

This is the code:

            // trigger on buttonUp instead of buttonDown
            Intent buttonDown = new Intent(Intent.ACTION_MEDIA_BUTTON);               
            buttonDown .putExtra(Intent.EXTRA_KEY_EVENT, new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_HEADSETHOOK));
            context.sendOrderedBroadcast(buttonDown , "android.permission.CALL_PRIVILEGED");

            // trigger on buttonUp instead of buttonDown
            Intent buttonUp = new Intent(Intent.ACTION_MEDIA_BUTTON);               
            buttonUp.putExtra(Intent.EXTRA_KEY_EVENT, new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_HEADSETHOOK));
            context.sendOrderedBroadcast(buttonUp, "android.permission.CALL_PRIVILEGED");

And this is the receiver code in the XML file:

<receiver android:name=".PhoneOutgoingCallReceiver" android:enabled="true"> <intent-filter android:priority="0"> <action android:name="android.intent.action.NEW_OUTGOING_CALL" /> </intent-filter> </receiver> <receiver android:name=".PhoneIncomingCallReceiver" android:enabled="true"> <intent-filter android:priority="0"> <category android:name="android.intent.category.DEFAULT" /> <action android:name="android.intent.action.PHONE_STATE" /> <action android:name="android.intent.action.MEDIA_BUTTON" /> </intent-filter> </receiver>

Anyone knows why it does not work on the real device? what are the different?

Thanks!