Call setVisibility while the view is animated

Question

When i call setVisibility on view's child while the (parent) view is animated with ViewCompat.postOnAnimation things get broken. (setVisibility doesn't work + some other things get broken).

Question - is there any method of animation or workaround which allows to call setVisibility on child while the parent is animated?

This is very important request and i think not so unusual, because for example http request is returned in random time, and the view can be animated anytime during that.

Code request edit:

Regarding code, it is bit complicated. I will first explain. It is animation in the custom CoordinatorLayout Behavior, clone of the standard BottomSheetBehavior (sliding of sheet from bottom to up).

Animation is launched by calling this:

ViewCompat.postOnAnimation(child, new SettleRunnable(child, targetState));

SettleRunnable is this:

private class SettleRunnable implements Runnable {

    private final View mView;

    @State
    private final int mTargetState;

    SettleRunnable(View view, @State int targetState) {
        mView = view;
        mTargetState = targetState;
    }

    @Override
    public void run() {
        if (mViewDragHelper != null && mViewDragHelper.continueSettling(true)) {
            ViewCompat.postOnAnimation(mView, this);
        } else {
            setStateInternal(mTargetState);
        }
    }
}

So as you can see, all the animation movement is done by mViewDragHelper.continueSettling. Drag helper is standard class ViewDragHelper.

ViewDragHelper.continueSettling looks like this

public boolean continueSettling(boolean deferCallbacks) {
    if (mDragState == STATE_SETTLING) {
        boolean keepGoing = mScroller.computeScrollOffset();
        final int x = mScroller.getCurrX();
        final int y = mScroller.getCurrY();
        final int dx = x - mCapturedView.getLeft();
        final int dy = y - mCapturedView.getTop();

        if (dx != 0) {
            ViewCompat.offsetLeftAndRight(mCapturedView, dx);
        }
        if (dy != 0) {
            ViewCompat.offsetTopAndBottom(mCapturedView, dy);
        }

        if (dx != 0 || dy != 0) {
            mCallback.onViewPositionChanged(mCapturedView, x, y, dx, dy);
        }

        if (keepGoing && x == mScroller.getFinalX() && y == mScroller.getFinalY()) {
            // Close enough. The interpolator/scroller might think we're still moving
            // but the user sure doesn't.
            mScroller.abortAnimation();
            keepGoing = false;
        }

        if (!keepGoing) {
            if (deferCallbacks) {
                mParentView.post(mSetIdleRunnable);
            } else {
                setDragState(STATE_IDLE);
            }
        }
    }

    return mDragState == STATE_SETTLING;
}

It simply animates the sheet up or down to desired position according the chosen target state.

Pseudo code of problem is:

launchAnimation(); // it takes eg 300 ms
changeVisibilityOfAnimatedViewChildren(); // this is problem

I can wait until the animation finishes, but as i said, in case of http request it is bit problem, i would like to ideally refresh the data right away without waiting.

Animated element is CoordinatorLayout. Affected child by setVisibility is one or more its children.
Judging by this link, android seems to have generally problem with animations and setVisibility.

Possible solutions i am thinking of now:

Maybe if i would change the visibility with another parallel postOnAnimation() task (?)
Or because it are basically just step by step subsequent calls of moving function mViewDragHelper.continueSettling() why don't do it without postOnAnimation()? I could run the task also without it. But i guess that postOnAnimation chooses some correct delay of animation step for concrete device + probably some other things.

Can you share code please? – Vulovic Vukasin Nov 30 '16 at 15:27 — Vulovic Vukasin, Nov 30 '16 at 15:27

score 0 · Answer 1 · answered Nov 30 '16 at 16:22

You can add AnimatorListenerAdapter to your parent animation, and override onAnimationEnd() method. In this method you can call the child animation. However, I would rather change alpha of view than visibility. You can achieve more smoothly effect in this case.

For example, consider this code:

 parentAnimationInstance.addListener(new AnimatorListenerAdapter() {
                                            @Override
                                            public void onAnimationEnd(Animator animation) {
                                                super.onAnimationEnd(animation);
                                                childView.animate()
                                                    .alpha(1.f)
                                                    .setDuration(200)
                                                    .start();
                                            }
                                        });

Hi. Yes wait until the animation finishes is one of the solutions. I was wondering if is it possible work with the children visibility while the view is animated, but thanks. — luky, Nov 30 '16 at 16:29

Call setVisibility while the view is animated

1 Answers1