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)。