android 判断耳机是否插入的几种方式

1.耳机插入和拔出时会发出广播ACTION_HEADSET_PLUG

private final BroadcastReceiver mReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { String action = intent.getAction(); if (action.equals(Intent.ACTION_HEADSET_PLUG)) { 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(); } } } } };

0：无插入，1：耳机和话筒均插入，2：仅插入话筒

2.在目录下读取状态

private static final String HEADSET_STATE_PATH = "/sys/class/switch/h2w/state"; nbsp;private boolean isHeadsetExists() { char[] buffer = new char[1024]; int newState = 0; try { FileReader file = new FileReader(HEADSET_STATE_PATH); int len = file.read(buffer, 0, 1024); newState = Integer.valueOf((new String(buffer, 0, len)).trim()); } catch (FileNotFoundException e) { Log.e("FMTest", "This kernel does not have wired headset support"); } catch (Exception e) { Log.e("FMTest", "", e); } return newState != 0; }

3.第二种比较麻烦，其实android提供一个接口

AudioManager localAudioManager = (AudioManager)context.getSystemService(Context.AUDIO_SERVICE); boolean isHeadSetOn = localAudioManager.isWiredHeadsetOn(); if(!isHeadSetOn){ Toast.makeText(context, "请插入话筒", Toast.LENGTH_LONG).show(); return; }

不要忘了加上权限

<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />