Fix bug 3214215 - ListView should stay scrolled to the bottom in transcript mode after a resize (da13dbae) · Commits · e / os / android_frameworks_base

core/java/android/widget/AbsListView.java

+22 −2

Original line number	Diff line number	Diff line
		@@ -611,6 +611,12 @@ public abstract class AbsListView extends AdapterView<ListAdapter> implements Te
		*/
		private int mDirection = 0;

		/**
		* Tracked on measurement in transcript mode. Makes sure that we can still pin to
		* the bottom correctly on resizes.
		*/
		private boolean mForceTranscriptScroll;

		/**
		* Interface definition for a callback to be invoked when the list or grid
		* has been scrolled.
		@@ -1693,6 +1699,16 @@ public abstract class AbsListView extends AdapterView<ListAdapter> implements Te
		listPadding.top = mSelectionTopPadding + mPaddingTop;
		listPadding.right = mSelectionRightPadding + mPaddingRight;
		listPadding.bottom = mSelectionBottomPadding + mPaddingBottom;

		// Check if our previous measured size was at a point where we should scroll later.
		if (mTranscriptMode == TRANSCRIPT_MODE_NORMAL) {
		final int childCount = getChildCount();
		final int listBottom = getBottom() - getPaddingBottom();
		final View lastChild = getChildAt(childCount - 1);
		final int lastBottom = lastChild != null ? lastChild.getBottom() : listBottom;
		mForceTranscriptScroll = mFirstPosition + childCount >= mOldItemCount &&
		lastBottom <= listBottom;
		}
		}

		/**
		@@ -4398,8 +4414,12 @@ public abstract class AbsListView extends AdapterView<ListAdapter> implements Te
		if (mTranscriptMode == TRANSCRIPT_MODE_ALWAYS_SCROLL) {
		mLayoutMode = LAYOUT_FORCE_BOTTOM;
		return;
		} else if (mTranscriptMode == TRANSCRIPT_MODE_NORMAL) {
		if (mForceTranscriptScroll) {
		mForceTranscriptScroll = false;
		mLayoutMode = LAYOUT_FORCE_BOTTOM;
		return;
		}
		if (mTranscriptMode == TRANSCRIPT_MODE_NORMAL) {
		final int childCount = getChildCount();
		final int listBottom = getBottom() - getPaddingBottom();
		final View lastChild = getChildAt(childCount - 1);