Merge "Fixed the motion when expanding notification groups" into nyc-dev

        boolean nowExpanded;

        int naturalHeight = mScaler.getNaturalHeight();

        if (wasClosed) {

            nowExpanded = (force || currentHeight > mOldHeight);

            nowExpanded = (force || currentHeight > mOldHeight && velocity >= 0);

        } else {

            nowExpanded = !force && currentHeight >= mOldHeight;

            nowExpanded = !force && (currentHeight >= mOldHeight || velocity > 0);

        }

        nowExpanded |= mNaturalHeight == mSmallSize;

        if (mScaleAnimation.isRunning()) {

            mScaleAnimation.cancel();

        }

        mCallback.setUserExpandedChild(mResizedView, nowExpanded);

        mCallback.expansionStateChanged(false);

        float targetHeight = nowExpanded ? naturalHeight : mSmallSize;

        if (targetHeight != currentHeight) {

            mScaleAnimation.setFloatValues(targetHeight);

            mScaleAnimation.setupStartValues();

            final View scaledView = mResizedView;

            final boolean expand = nowExpanded;

            mScaleAnimation.addListener(new AnimatorListenerAdapter() {

                public boolean mCancelled;

                @Override

                public void onAnimationEnd(Animator animation) {

                    if (!mCancelled) {

                        mCallback.setUserExpandedChild(scaledView, expand);

                    }

                    mCallback.setUserLockedChild(scaledView, false);

                    mScaleAnimation.removeListener(this);

                }

                @Override

                public void onAnimationCancel(Animator animation) {

                    mCancelled = true;

                }

            });

            velocity = nowExpanded == velocity >= 0 ? velocity : 0;

            mFlingAnimationUtils.apply(mScaleAnimation, currentHeight, targetHeight, velocity);

            mScaleAnimation.start();

        } else {

            mCallback.setUserExpandedChild(mResizedView, nowExpanded);

            mCallback.setUserLockedChild(mResizedView, false);

        }