NOT a fix to CoordinatorLayout

gistfile1.java

/*
 * Copyright 2015 João Martins Costa
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import android.content.Context;
import android.support.design.widget.CoordinatorLayout;
import android.util.AttributeSet;
import android.view.View;

import java.lang.reflect.Field;
import java.util.Comparator;

public class SimpleCoordinatorLayout extends CoordinatorLayout {
    public SimpleCoordinatorLayout(Context context) {
        this(context, null);
    }

    public SimpleCoordinatorLayout(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public SimpleCoordinatorLayout(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);

        try {
            Field comparatorField = CoordinatorLayout.class.getDeclaredField("mLayoutDependencyComparator");
            comparatorField.setAccessible(true);

            Comparator<View> layoutDependencyComparator = (Comparator<View>) comparatorField.get(this);
            comparatorField.set(this, new BehaviorComparator(layoutDependencyComparator));
        } catch (NoSuchFieldException | IllegalAccessException e) {
            e.printStackTrace();
        }
    }

    private class BehaviorComparator implements Comparator<View> {
        Comparator<View> mDefaultComparator;

        public BehaviorComparator(Comparator<View> bla) {
            mDefaultComparator = bla;
        }

        public int compare(View lhs, View rhs) {
            int compare = mDefaultComparator.compare(lhs, rhs);
            if (compare == 0 && lhs != rhs) {
                // Null behavior means that the view doesn't depend on anything.
                Behavior b1 = ((CoordinatorLayout.LayoutParams) lhs.getLayoutParams()).getBehavior();
                Behavior b2 = ((CoordinatorLayout.LayoutParams) rhs.getLayoutParams()).getBehavior();
                if (b1 == null && b2 != null) {
                    return -1;
                } else if (b1 != null && b2 == null) {
                    return 1;
                } else {
                    return 0;
                }
            } else {
                return compare;
            }
        }
    }
}