package com.renhui.ej;

import android.content.BroadcastReceiver;

import android.content.Context;

import android.content.Intent;

import android.content.IntentFilter;

import android.os.Bundle;

import android.support.v7.app.AppCompatActivity;

import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    HeadsetPlugReceiver headsetPlugReceiver;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        registerHeadsetPlugReceiver();  // 注册监听

    }

    private void registerHeadsetPlugReceiver() {

        headsetPlugReceiver = new HeadsetPlugReceiver();

        IntentFilter filter = new IntentFilter();

        filter.addAction("android.intent.action.HEADSET_PLUG");

        registerReceiver(headsetPlugReceiver, filter);

    }

    @Override

    protected void onDestroy() {

        // TODO Auto-generated method stub

        super.onDestroy();

        unregisterReceiver(headsetPlugReceiver);  //注销监听

    }

    class HeadsetPlugReceiver extends BroadcastReceiver {

        @Override

        public void onReceive(Context context, Intent intent) {

            // TODO Auto-generated method stub

            if (intent.hasExtra("state")) {

                if (intent.getIntExtra("state", 0) == 0) {

                    Toast.makeText(context, "headset not connected", Toast.LENGTH_LONG).show();

                } else if (intent.getIntExtra("state", 0) == 1) {

                    Toast.makeText(context, "headset  connected", Toast.LENGTH_LONG).show();

                }

            }

        }

    }

}