Detect whether headset has microphone

Question

I need to detect whether the plugged in wired headset has microphone or not.

I can check if a headset is plugged in using isWiredHeadSetOn(), but for microphone does

Answer 1

UPDATE: Go ahead and register ACTION_HEADSET_PLUG in your activity's onResume(). If user has ever plugged in/out her headset after boot-up, platform will deliver the latest state to your activity when it resumes.

Following test code worked:

package com.example.headsetplugtest;

import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.util.Log;

public class HeadSetPlugIntentActivity extends Activity {

    private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            final String action = intent.getAction();
            if (Intent.ACTION_HEADSET_PLUG.equals(action)) {
                Log.d("HeadSetPlugInTest", "state: " + intent.getIntExtra("state", -1));
                Log.d("HeadSetPlugInTest", "microphone: " + intent.getIntExtra("microphone", -1));
            }
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    protected void onResume() {
        super.onResume();

        IntentFilter filter = new IntentFilter(Intent.ACTION_HEADSET_PLUG);
        getApplicationContext().registerReceiver(mReceiver, filter);
    }

    @Override
    protected void onStop() {
        super.onStop();

        getApplicationContext().unregisterReceiver(mReceiver);
    }
}