MotionSpec.java 文件源码

/**
 * Inflates an instance of MotionSpec from the animator resource indexed in the given attributes
 * array.
 */
@Nullable
public static MotionSpec createFromAttribute(
    Context context, TypedArray attributes, @StyleableRes int index) {
  if (attributes.hasValue(index)) {
    int resourceId = attributes.getResourceId(index, 0);
    if (resourceId != 0) {
      return createFromResource(context, resourceId);
    }
  }
  return null;
}