Intent.ACTION_HEADSET_PLUG的状态额外总是在1上返回

Question

我使用BroadcastReceiver是为了知道耳机是否插到设备上，但在任何情况下，“状态”都会立即返回到1（已插）。

以下是我的代码:

public class Class {

  boolean isHeadsetOn;
  IntentFilter headsetReceiverFilter;
  HeadsetPluggedReceiver headsetReceiver;

  public Class(Context context) {
    this.headsetReceiverFilter = new IntentFilter(Intent.ACTION_HEADSET_PLUG);
    this.headsetReceiver = new HeadsetPluggedReceiver();
    context.registerReceiver(this.headsetReceiver, this.headsetReceiverFilter);
  }

  private class HeadsetPluggedReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
      switch(intent.getIntExtra("state", -1)) {
        case 0:
          Synthesizer.this.isHeadsetOn = false;
          Log.d("onreceive", "off");
        case 1:
          Synthesizer.this.isHeadsetOn = true;
          Log.d("onreceive", "on");
        default:
          // shit
      }
    }

  }

}

这是我的日志：

// not plugged. plugging in
onreceive | on
// unplugging
onreceive | off
onreceive | on
// plugging in again
onreceive | on
// plugging off again
onreceive | off
onreceive | on

我该如何解决这个问题？

提前感谢。

Answer 1

**应为:* *

@Override
public void onReceive(Context context, Intent intent) {
  switch(intent.getIntExtra("state", -1)) {
    case 0:
      Synthesizer.this.isHeadsetOn = false;
      Log.d("onreceive", "off");
      break; //<---------
    case 1:
      Synthesizer.this.isHeadsetOn = true;
      Log.d("onreceive", "on");
      break; //<---------
    default:
      // shit
  }
}

}

Answer 2

您需要在开关案例中使用中断语句。现在你的逻辑正在下降到案例1。