import com.sonyericsson.extras.liveware.aef.registration.Registration.Device; //导入依赖的package包/类
/**
 * Check in the database if there are any accessories connected.
 *
 * @return True if at least one accessories is connected.
 */
protected boolean areAnyAccessoriesConnected() {
  Cursor cursor = null;
  try {
    cursor = getContentResolver().query(Device.URI, null,
                                        DeviceColumns.ACCESSORY_CONNECTED + " = 1", null, null);
    if (cursor != null) {
      return (cursor.getCount() > 0);
    }
  } catch (SQLException | SecurityException | IllegalArgumentException exception) {
    if (Dbg.DEBUG) {
      Dbg.e("Failed to query connected accessories", exception);
    }
  } finally {
    if (cursor != null) {
      cursor.close();
    }
  }

  return false;
}
 

import com.sonyericsson.extras.liveware.aef.registration.Registration.Device; //导入依赖的package包/类
/**
 * Check if this host application has a vibrator.
 *
 * @return True if vibrator exists.
 */
protected boolean hasVibrator() {
  long hostAppId = getHostAppId();

  Cursor cursor = null;
  try {
    cursor = mContext.getContentResolver().query(
      Device.URI,
      new String[] {
        DeviceColumns.VIBRATOR
      },
      DeviceColumns.HOST_APPLICATION_ID + " = " + hostAppId + " AND "
      + DeviceColumns.VIBRATOR + " = 1", null, null);
    if (cursor != null) {
      return (cursor.getCount() > 0);
    }
  } catch (SQLException | SecurityException | IllegalArgumentException exception) {
    if (Dbg.DEBUG) {
      Dbg.e("Failed to query vibrator", exception);
    }
  } finally {
    if (cursor != null) {
      cursor.close();
    }
  }

  return false;
}