在工作中，我们有时候会处理到耳机按键的逻辑，主要分为两类，一种是短按，一种是长按。

监听耳机的按键事件的方法有两种：

方法一：注册监听Media Button的按键事件

import android.app.Activity;

import android.app.ProgressDialog;

import android.content.BroadcastReceiver;

import android.content.ComponentName;

import android.content.Context;

import android.content.Intent;

import android.content.IntentFilter;

import android.media.AudioManager;

import android.os.Bundle;

import android.util.Log;

import android.view.KeyEvent;

public class MainActivity extends Activity {

private AudioManager mAudioManager;

private ComponentName mComponentName;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

mAudioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);

// AudioManager注册一个MediaButton对象

mComponentName = new ComponentName(getPackageName(), MediaButtonReceiver.class.getName());

}

@Override

protected void onResume() {

mAudioManager.registerMediaButtonEventReceiver(mComponentName);

registerReceiver(headSetReceiver, new IntentFilter(Intent.ACTION_HEADSET_PLUG));

super.onResume();

}

@Override

protected void onPause() {

// 取消注册

mAudioManager.unregisterMediaButtonEventReceiver(mComponentName);

unregisterReceiver(headSetReceiver);

super.onPause();

}

@Override

protected void onDestroy() {

mAudioManager = null;

mComponentName = null;

super.onDestroy();

}

private final BroadcastReceiver headSetReceiver = new BroadcastReceiver() {

@Override

public void onReceive(Context context, Intent intent) {

String action = intent.getAction();

if (action.equals(Intent.ACTION_HEADSET_PLUG)) {

// phone headset plugged

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

// do something

//Log.d(TAG, "耳机检测：插入");

//Toast.makeText(context, "耳机检测：插入", Toast.LENGTH_SHORT) .show();

mAudioManager.registerMediaButtonEventReceiver(mComponentName);

// phone head unplugged

} else {

// do something

//Log.d(TAG, "耳机检测：没有插入");

//Toast.makeText(context, "耳机检测：没有插入", Toast.LENGTH_SHORT).show();

mAudioManager.unregisterMediaButtonEventReceiver(mComponentName);

}

}

}

};MediaButtonReceiver.javaimport android.content.BroadcastReceiver;

import android.content.Context;

import android.content.Intent;

import android.util.Log;

import android.view.KeyEvent;

import android.widget.Toast;

public class MediaButtonReceiver extends BroadcastReceiver {

private static String TAG = "MediaButtonReceiver";

@Override

public void onReceive(Context context, Intent intent) {

// 获得Action

String intentAction = intent.getAction();

// 获得KeyEvent对象

KeyEvent keyEvent = (KeyEvent) intent

.getParcelableExtra(Intent.EXTRA_KEY_EVENT);

Log.i(TAG, "Action ---->" + intentAction + " KeyEvent----->"

+ keyEvent.toString());

// 按下 / 松开 按钮

int keyAction = keyEvent.getAction();

if (Intent.ACTION_MEDIA_BUTTON.equals(intentAction)

&& (KeyEvent.ACTION_DOWN == keyAction)) {

// 获得按键字节码

int keyCode = keyEvent.getKeyCode();

// 获得事件的时间

// long downtime = keyEvent.getEventTime();

// 获取按键码 keyCode

//StringBuilder sb = new StringBuilder();

这些都是可能的按键码 ， 打印出来用户按下的键

//if (KeyEvent.KEYCODE_MEDIA_NEXT == keyCode) {

//sb.append("KEYCODE_MEDIA_NEXT");

//}

// 说明：当我们按下MEDIA_BUTTON中间按钮时，实际出发的是 KEYCODE_HEADSETHOOK 而不是

// KEYCODE_MEDIA_PLAY_PAUSE

if (KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE == keyCode) {

//sb.append("KEYCODE_MEDIA_PLAY_PAUSE");

}

if (KeyEvent.KEYCODE_HEADSETHOOK == keyCode) {

//sb.append("KEYCODE_HEADSETHOOK");

}

if (KeyEvent.KEYCODE_MEDIA_PREVIOUS == keyCode) {

//sb.append("KEYCODE_MEDIA_PREVIOUS");

}

if (KeyEvent.KEYCODE_MEDIA_STOP == keyCode) {

//sb.append("KEYCODE_MEDIA_STOP");

}

// 输出点击的按键码

//Log.i(TAG, sb.toString());

//Toast.makeText(context, sb.toString(), Toast.LENGTH_SHORT).show();

} else if (KeyEvent.ACTION_UP == keyAction) {

Log.i("chengjie", "aaa");

}

}

}注意，在AndroidManifest.xml中定义

注意这种方法只能监听耳机的短按事件，如果想监听长按事件，请用方法二。

方法二：直接监听onKeyDown方法

@Override

public boolean onKeyDown(int keyCode, KeyEvent event) {

if (KeyEvent.KEYCODE_HEADSETHOOK == keyCode) { //按下了耳机键

if (event.getRepeatCount() == 0) { //如果长按的话，getRepeatCount值会一直变大

//短按

} else {

//长按

}

}

}

原文：http://blog.csdn.net/shineflowers/article/details/44857549