android 监听耳机插拔

最新推荐文章于 2024-07-10 14:33:20 发布

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最新推荐文章于 2024-07-10 14:33:20 发布

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本文介绍了两种在Android中监听耳机插拔的方法：1. 使用BroadcastReceiver监听ACTION_HEADSET_PLUG Intent；2. 通过读取系统状态文件进行实时监控。详细代码示例帮助开发者实现耳机状态检测。

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两种方式
1、在activity里面通过BroadcastReceiver Inter消息来监听耳机插拔
//实现类
private HeadsetReceiver mHeadsetReceiver ;
public class HeadsetReceiver extends BroadcastReceiver {
  @Override
  public void onReceive(Context context, Intent intent) {
       if (intent.getAction().equalsIgnoreCase(Intent.ACTION_HEADSET_PLUG)) {
                 int state = intent.getIntExtra("state", 0);
           if (intent.hasExtra("state")) {
                        if (intent.getIntExtra("state", 0) == 0) {
                                     //Headset is not plugged
                                     log.v(TAG,"耳机未插入");
                        } else if (intent.getIntExtra("state", 0) == 1)//Headphones into
                        {
                              log.v(TAG,"耳机已插入");
                       }
                 }
     }
}
}
调用：
public void onCreate(Bundle savedInstanceState) {
             super.onCreate(savedInstanceState);
              registerReceiver(mHeadsetPlugUnplugBroadcastReceiver,
              new IntentFilter(Intent.ACTION_HEADSET_PLUG));
}

2 、通过线程监听打开state文件比对里面的值来检测耳机是否插入
      1：表示已插入耳机，0：表示未插入耳机
      private  FileReader file;
      private  String HEADSET_STATE_PATH = "/sys/class/switch/h2w/state";
       public void spraygunRun() {
        new Thread(new Runnable() {
            public void run() {
                    try {
                        while(!Thread.currentThread().isInterrupted()){
                        Thread.sleep(1000);
                        file = new FileReader(HEADSET_STATE_PATH);
                        char[] buffer = new char[1024];
                        int len = file.read(buffer, 0, 1024);
                        int headsetState = Integer.valueOf((new String(buffer, 0, len)).trim());
                        if(headsetState==0){
                              log.v(TAG,"耳机未插入");
                          }
                       }
                    } catch (Exception e) {
                        Thread.currentThread().interrupt();
                    }
                }
        }).start();
    }