Route audio via speaker when headphone plugged it

How we can route audio output via speaker even when the headset is plugged in?

My code:

    if(audioManager.isWiredHeadsetOn())
    {
        audioManager.setWiredHeadsetOn(false);
        audioManager.setSpeakerphoneOn(true); 
        audioManager.setRouting(AudioManager.MODE_NORMAL, AudioManager.ROUTE_SPEAKER, AudioManager.ROUTE_ALL);  
        audioManager.setMode(AudioManager.MODE_NORMAL); 

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Am I missing something here?

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Did you try adding <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" /> to your AndroidManifest.xml ?

http://developer.android.com/reference/android/Manifest.permission.html#MODIFY_AUDIO_SETTINGS

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The method AudioManager.setRouting() is depreciated.

From the Javadoc:

Do not set audio routing directly, use setSpeakerphoneOn(), setBluetoothScoOn() methods instead.

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maybe you need to audioManager.setMode(AudioManager.MODE_IN_CALL) or MODE_IN_COMMUNICATION;