返回null的Intent.ACTION_HEADSET_PLUG

Question

public PluginResult execute(String action, JSONArray args, String callbackId) {         
  try {
    Intent intent = new Intent(Intent.ACTION_HEADSET_PLUG);
    String nm = intent.getStringExtra("name");
    String st1 = intent.getStringExtra("state");
    Log.v("nikhil","i="+intent+" name="+nm+" 2="+st1);

    return new PluginResult(PluginResult.Status.OK);

  } catch(Exception e) {            

    Log.e("MailApp", "Could not send email", e); 
  }
  return null; 
}

nm和st1一直处于null状态。即使耳机插上电源也是如此！

Answer 1

当头戴式耳机插入或拔出手持设备时，安卓系统会触发Intent Intent.ACTION_HEADSET_PLUG。

您需要实现一个BroadcastReceiver来在此事件发生时捕获它。这是一个粘性事件，因此您可以使用以下快捷方式：

IntentFilter filter = new IntentFilter(Intent.ACTION_HEADSET_PLUG);
Intent headsetState= this.registerReceiver(null, filter);
int state = headsetState.getIntExtra("state", -1);
String name = headsetState.getStringExtra("name");