Ensure list scrolling API is in parity with view scrolling API (ba299063) · Commits · e / os / android_frameworks_base

api/current.txt

+2 −1

Original line number	Diff line number	Diff line
		@@ -30395,6 +30395,7 @@ package android.widget {
		ctor public AbsListView(android.content.Context, android.util.AttributeSet, int);
		method public void afterTextChanged(android.text.Editable);
		method public void beforeTextChanged(java.lang.CharSequence, int, int, int);
		method public boolean canScrollList(int);
		method public void clearChoices();
		method public void clearTextFilter();
		method public void deferNotifyDataSetChanged();
		@@ -30436,7 +30437,7 @@ package android.widget {
		method public int pointToPosition(int, int);
		method public long pointToRowId(int, int);
		method public void reclaimViews(java.util.List<android.view.View>);
		method public boolean scrollListBy(int);
		method public void scrollListBy(int);
		method public void setAdapter(android.widget.ListAdapter);
		method public void setCacheColorHint(int);
		method public void setChoiceMode(int);

+30 −4

Original line number	Diff line number	Diff line
		@@ -4924,11 +4924,37 @@ public abstract class AbsListView extends AdapterView<ListAdapter> implements Te
		* Scrolls the list items within the view by a specified number of pixels.
		*
		* @param y the amount of pixels to scroll by vertically
		* @return true if the list is able to scroll, or false if the list is
		* already at the beginning/end and unable to scroll any more.
		* @see #canScrollList(int)
		*/
		public boolean scrollListBy(int y) {
		return !trackMotionScroll(-y, -y);
		public void scrollListBy(int y) {
		trackMotionScroll(-y, -y);
		}

		/**
		* Check if the items in the list can be scrolled in a certain direction.
		*
		* @param direction Negative to check scrolling up, positive to check
		* scrolling down.
		* @return true if the list can be scrolled in the specified direction,
		* false otherwise.
		* @see #scrollListBy(int)
		*/
		public boolean canScrollList(int direction) {
		final int childCount = getChildCount();
		if (childCount == 0) {
		return false;
		}

		final int firstPosition = mFirstPosition;
		final Rect listPadding = mListPadding;
		if (direction > 0) {
		final int lastBottom = getChildAt(childCount - 1).getBottom();
		final int lastPosition = firstPosition + childCount;
		return lastPosition < mItemCount \|\| lastBottom > getHeight() - listPadding.bottom;
		} else {
		final int firstTop = getChildAt(0).getTop();
		return firstPosition > 0 \|\| firstTop < listPadding.top;
		}
		}

		/**