Android: Playing sound over Sco Bluetooth headset

Question

For the past few days I have been trying to play any sound over my sco bluetooth headset from my android phone. My final goal with this project is to eventually make a garage do

Answer 1

I found the solution on this page. You have to call audioManager.setMode(AudioManager.MODE_IN_CALL); only after the socket is connected, i.e., you received AudioManager.SCO_AUDIO_STATE_CONNECTED. I could hear the TTS on my Spica running android 2.2.2.

Edit: Here is my (old) implementation:

public class BluetoothNotificationReceiver
extends BroadcastReceiver
{   

    /**
     * 
     */
    public BluetoothNotificationReceiver(Handler h)
    {
        super();
        bnrHandler = h;
    }

    /* (non-Javadoc)
     * @see android.content.BroadcastReceiver#onReceive(android.content.Context, android.content.Intent)
     */
    @Override
    public void onReceive(Context arg0, Intent arg1)
    {
        String action = arg1.getAction();
        if (action.equalsIgnoreCase(AudioManager.ACTION_SCO_AUDIO_STATE_CHANGED))
        {
            int l_state = arg1.getIntExtra(AudioManager.EXTRA_SCO_AUDIO_STATE, -1);
            Log.d("bnr", "Audio SCO: " + AudioManager.ACTION_SCO_AUDIO_STATE_CHANGED);
            switch(l_state)
            {
            case AudioManager.SCO_AUDIO_STATE_CONNECTED:
            { 
                Log.i("bnr", "SCO_AUDIO_STATE_CONNECTED");
            }
            break;
            case AudioManager.SCO_AUDIO_STATE_DISCONNECTED:
                { 
                    Log.e("bnr", "SCO_AUDIO_STATE_DISCONNECTED");                   
                }
            break;
            default: Log.e("bnr", "unknown state received:"+l_state);
            }
        }
        else
            Log.e("bnr", "onReceive:action="+action);
    }
}

I don't know if it is still working with the new APIs.

Answer 2

I actually managed to fix this. The problem was that my pitch that I played over the headset was too high of a frequency. I fixed it by simply doubling up the code that creates the audio file so that it goes HIGH HIGH LOW LOW instead of HIGH LOW HIGH LOW.

Answer 3

Try setting the audiomanager to AudioManager.MODE_NORMAL. Thos worked for me.

Answer 4

Add to manifest:

<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
<uses-permission android:name="android.permission.BLUETOOTH" />