MaterialResources.java 文件源码

/**
 * Returns the @StyleableRes index that contains value in the attributes array. If both indices
 * contain values, the first given index takes precedence and is returned.
 */
@StyleableRes
static int getIndexWithValue(TypedArray attributes, @StyleableRes int a, @StyleableRes int b) {
  if (attributes.hasValue(a)) {
    return a;
  }
  return b;
}