BaseFragment.java 文件源码

/**
 * Inflates a desired Transition from the specified <var>resource</var>.
 *
 * @param resource Resource id of the desired transition to inflate.
 * @return Inflated transition or {@code null} if the current API level does not support transitions
 * or this fragment is not attached to its parent context.
 * @see TransitionInflater#inflateTransition(int)
 */
@Nullable
protected Transition inflateTransition(@TransitionRes int resource) {
    final Activity activity = getActivity();
    return activity != null && FragmentPolicies.TRANSITIONS_SUPPORTED ? TransitionInflater.from(activity).inflateTransition(resource) : null;
}