Utils.java 文件源码

public static <T> T castView(View view, @IdRes int id, String who, Class<T> cls) {
  try {
    return cls.cast(view);
  } catch (ClassCastException e) {
    String name = getResourceEntryName(view, id);
    throw new IllegalStateException("View '"
        + name
        + "' with ID "
        + id
        + " for "
        + who
        + " was of the wrong type. See cause for more info.", e);
  }
}