Fix first child handling with GONE children. (9f347ae2) · Commits · e / os / android_frameworks_base

packages/SystemUI/src/com/android/systemui/statusbar/stack/StackScrollAlgorithm.java

+13 −5

Original line number	Diff line number	Diff line
		@@ -415,11 +415,9 @@ public class StackScrollAlgorithm {
		*/
		private void updateZValuesForState(StackScrollState resultState,
		StackScrollAlgorithmState algorithmState) {
		ViewGroup hostView = resultState.getHostView();
		int childCount = algorithmState.visibleChildren.size();
		for (int i = 0; i < childCount; i++) {
		View child = algorithmState.visibleChildren.get(i);
		if (child.getVisibility() == View.GONE) continue;
		StackScrollState.ViewState childViewState = resultState.getViewStateForView(child);
		if (i < algorithmState.itemsInTopStack) {
		float stackIndex = algorithmState.itemsInTopStack - i;
		@@ -453,8 +451,8 @@ public class StackScrollAlgorithm {
		}

		private void updateFirstChildHeightWhileExpanding(ViewGroup hostView) {
		if (hostView.getChildCount() > 0) {
		mFirstChildWhileExpanding = hostView.getChildAt(0);
		mFirstChildWhileExpanding = findFirstVisibleChild(hostView);
		if (mFirstChildWhileExpanding != null) {
		if (mExpandedOnStart) {

		// We are collapsing the shade, so the first child can get as most as high as the
		@@ -466,11 +464,21 @@ public class StackScrollAlgorithm {
		mFirstChildMaxHeight = getMaxAllowedChildHeight(mFirstChildWhileExpanding);
		}
		} else {
		mFirstChildWhileExpanding = null;
		mFirstChildMaxHeight = 0;
		}
		}

		private View findFirstVisibleChild(ViewGroup container) {
		int childCount = container.getChildCount();
		for (int i = 0; i < childCount; i++) {
		View child = container.getChildAt(i);
		if (child.getVisibility() != View.GONE) {
		return child;
		}
		}
		return null;
		}

		public void onExpansionStopped() {
		mIsExpansionChanging = false;
		mFirstChildWhileExpanding = null;