Disable internal and external speakers and allow only earphones to watch video or listen Audio

Question

I have some videos of which audios sound should be available only through earphone, not from inbuilt speaker or external speakers. NOTE: It should not allow External Speakers with 3.5mm jack. What is the possibility to solve it? It will be great if anybody help me out with this.

Answer 1

Check if the headset is plugged in:

private boolean isHeadphonesPlugged(){
        AudioManager audioManager = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
        AudioDeviceInfo[] audioDevices = audioManager.getDevices(AudioManager.GET_DEVICES_ALL);
        for(AudioDeviceInfo deviceInfo : audioDevices){
            if(deviceInfo.getType()==AudioDeviceInfo.TYPE_WIRED_HEADPHONES
                    || deviceInfo.getType()==AudioDeviceInfo.TYPE_WIRED_HEADSET){
                return true;
            }
        }
        return false;
    }

In a separated thread checks if the headPhones are going to be plugged out using the method above(in that case you have to stop your mediaPlayer and apply your logic)!

For reference