DispatchWindowInsetsToAllChildrenListener.java

/**
 * @see <a href="https://medium.com/androiddevelopers/windows-insets-fragment-transitions-9024b239a436">Windows Insets + Fragment Transitions</a>
 */
public class DispatchWindowInsetsToAllChildrenListener implements OnApplyWindowInsetsListener {

    @Override
    public WindowInsetsCompat onApplyWindowInsets(View view, WindowInsetsCompat windowInsetsCompat) {
        boolean consumed = false;

        if (view instanceof ViewGroup) {
            ViewGroup viewGroup = (ViewGroup) view;
            // Dispatch the insets to the child
            int childCount = viewGroup.getChildCount();
            for (int i = 0; i < childCount; i++) {
                View child = viewGroup.getChildAt(i);
                WindowInsetsCompat childResult = ViewCompat.dispatchApplyWindowInsets(child, windowInsetsCompat);
                // If the child consumed the insets, record it
                if (childResult.isConsumed()) {
                    consumed = true;
                }
            }
        }

        // If any of the children consumed the insets, return an appropriate value
        return consumed ? windowInsetsCompat.consumeSystemWindowInsets() : windowInsetsCompat;
    }
}