MDRootLayout.java 文件源码

private void invertGravityIfNecessary() {
  if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR1) {
    return;
  }
  Configuration config = getResources().getConfiguration();
  if (config.getLayoutDirection() == View.LAYOUT_DIRECTION_RTL) {
    switch (buttonGravity) {
      case START:
        buttonGravity = GravityEnum.END;
        break;
      case END:
        buttonGravity = GravityEnum.START;
        break;
    }
  }
}