android 12 线控耳机的双击事件

Android 12中的线控耳机双击事件可以通过注册BroadcastReceiver来实现。具体步骤如下：

1. 在AndroidManifest.xml文件中添加以下权限：

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

2. 在BroadcastReceiver中注册广播接收器：

public class EarphoneButtonReceiver extends BroadcastReceiver {

    private static final String TAG = EarphoneButtonReceiver.class.getSimpleName();

    @Override
    public void onReceive(Context context, Intent intent) {
        String intentAction = intent.getAction();
        if (!Intent.ACTION_MEDIA_BUTTON.equals(intentAction)) {
            return;
        }

        KeyEvent event = (KeyEvent) intent.getParcelableExtra(Intent.EXTRA_KEY_EVENT);
        if (event == null) {
            return;
        }

        int keycode = event.getKeyCode();
        int action = event.getAction();

        if (action == KeyEvent.ACTION_DOWN && keycode == KeyEvent.KEYCODE_HEADSETHOOK) {
            //线控耳机双击事件触发的代码
            Log.d(TAG, "Earphone double click detected.");
        }
    }
}

3. 在Activity或Service中注册BroadcastReceiver：

private EarphoneButtonReceiver mEarphoneButtonReceiver;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    mEarphoneButtonReceiver = new EarphoneButtonReceiver();
    IntentFilter filter = new IntentFilter(Intent.ACTION_MEDIA_BUTTON);
    registerReceiver(mEarphoneButtonReceiver, filter);
}

@Override
protected void onDestroy() {
    super.onDestroy();

    unregisterReceiver(mEarphoneButtonReceiver);
}

这样就可以在双击线控耳机按钮时触发相应的事件了。