关于项目中依赖的design版本升级过后，项目中的自定义behavivor（上拉隐藏，下拉显示）的view隐藏后不再显示的问题解决方案

问题描述：项目中有个界面下方有个悬浮开通提示，开通提示布局有个自定义的behavior，效果是上拉隐藏，下拉显示。本来项目用的design包版本是compile ‘com.Android.support:design:25.0.1’，后来更新了AndroidStudio，顺便也把design包改为compile ‘com.android.support:design:25.3.0’了，改了之后，可以正常隐藏，但是上拉就不显示了。

public class QuickReturnFooterBehavior extends CoordinatorLayout.Behavior<View> {
    private static final Interpolator INTERPOLATOR = new FastOutSlowInInterpolator();

    private int mDySinceDirectionChange;
    private boolean mIsShowing;
    private boolean mIsHiding;

    public QuickReturnFooterBehavior(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    public boolean onStartNestedScroll(CoordinatorLayout coordinatorLayout, View child, View directTargetChild, View target, int nestedScrollAxes) {
        return (nestedScrollAxes & ViewCompat.SCROLL_AXIS_VERTICAL) != 0;
    }

    @Override
    public void onNestedPreScroll(CoordinatorLayout coordinatorLayout, View child, View target, int dx, int dy, int[] consumed) {
        if (dy > 0 && mDySinceDirectionChange < 0 || dy < 0 && mDySinceDirectionChange > 0) {
            // We detected a direction change- cancel existing animations and reset our cumulative delta Y
            child.animate().cancel();
            mDySinceDirectionChange = 0;
        }

        mDySinceDirectionChange += dy;

        if (mDySinceDirectionChange > child.getHeight() && child.getVisibility() == View.VISIBLE && !mIsHiding) {
            hide(child);
        } else if (mDySinceDirectionChange < 0 && child.getVisibility() == View.INVISIBLE && !mIsShowing) {
            show(child);
        }
    }

    /**
     * Hide the quick return view.
     *
     * Animates hiding the view, with the view sliding down and out of the screen.
     * After the view has disappeared, its visibility will change to GONE.
     *
     * @param view The quick return view
     */
    private void hide(final View view) {
        mIsHiding = true;
        ViewPropertyAnimator animator = view.animate().translationY(view.getHeight()).setInterpolator(INTERPOLATOR).setDuration(200);

        animator.setListener(new Animator.AnimatorListener() {
            @Override
            public void onAnimationStart(Animator animator) {}

            @Override
            public void onAnimationEnd(Animator animator) {
                // Prevent drawing the View after it is gone
                mIsHiding = false;
                view.setVisibility(View.INVISIBLE);
            }

            @Override
            public void onAnimationCancel(Animator animator) {
                // Canceling a hide should show the view
                mIsHiding = false;
                if (!mIsShowing) {
                    show(view);
                }
            }

            @Override
            public void onAnimationRepeat(Animator animator) {}
        });

        animator.start();
    }

    /**
     * Show the quick return view.
     *
     * Animates showing the view, with the view sliding up from the bottom of the screen.
     * After the view has reappeared, its visibility will change to VISIBLE.
     *
     * @param view The quick return view
     */
    private void show(final View view) {
        mIsShowing = true;
        ViewPropertyAnimator animator = view.animate().translationY(0).setInterpolator(INTERPOLATOR).setDuration(200);

        animator.setListener(new Animator.AnimatorListener() {
            @Override
            public void onAnimationStart(Animator animator) {
                view.setVisibility(View.VISIBLE);
            }

            @Override
            public void onAnimationEnd(Animator animator) {
                mIsShowing = false;
            }

            @Override
            public void onAnimationCancel(Animator animator) {
                // Canceling a show should hide the view
                mIsShowing = false;
                if (!mIsHiding) {
                    hide(view);
                }
            }

            @Override
            public void onAnimationRepeat(Animator animator) {}
        });

        animator.start();
    }
}

解决方案：把view.setVisibility(View.GONE)修改为view.setVisibility(View.INVISIBLE)。