Set up view state before attaching, jump drawables if needed (01ba4220) · Commits · e / os / android_frameworks_base

core/java/android/widget/AbsListView.java

+16 −22

Original line number	Diff line number	Diff line
		@@ -2315,22 +2315,24 @@ public abstract class AbsListView extends AdapterView<ListAdapter> implements Te
		}

		/**
		* Get a view and have it show the data associated with the specified
		* position. This is called when we have already discovered that the view is
		* not available for reuse in the recycle bin. The only choices left are
		* Gets a view and have it show the data associated with the specified
		* position. This is called when we have already discovered that the view
		* is not available for reuse in the recycle bin. The only choices left are
		* converting an old view or making a new one.
		*
		* @param position The position to display
		* @param isScrap Array of at least 1 boolean, the first entry will become true if
		* the returned view was taken from the "temporary detached" scrap heap, false if
		* otherwise.
		* @param position the position to display
		* @param outMetadata an array of at least 1 boolean where the first entry
		* will be set {@code true} if the view is currently
		* attached to the window, {@code false} otherwise (e.g.
		* newly-inflated or remained scrap for multiple layout
		* passes)
		*
		* @return A view displaying the data associated with the specified position
		*/
		View obtainView(int position, boolean[] isScrap) {
		View obtainView(int position, boolean[] outMetadata) {
		Trace.traceBegin(Trace.TRACE_TAG_VIEW, "obtainView");

		isScrap[0] = false;
		outMetadata[0] = false;

		// Check whether we have a transient state view. Attempt to re-bind the
		// data and discard the view if we fail.
		@@ -2349,7 +2351,7 @@ public abstract class AbsListView extends AdapterView<ListAdapter> implements Te
		}
		}

		isScrap[0] = true;
		outMetadata[0] = true;

		// Finish the temporary detach started in addScrapView().
		transientView.dispatchFinishTemporaryDetach();
		@@ -2362,19 +2364,11 @@ public abstract class AbsListView extends AdapterView<ListAdapter> implements Te
		if (child != scrapView) {
		// Failed to re-bind the data, return scrap to the heap.
		mRecycler.addScrapView(scrapView, position);
		} else {
		if (child.isTemporarilyDetached()) {
		isScrap[0] = true;
		} else if (child.isTemporarilyDetached()) {
		outMetadata[0] = true;

		// Finish the temporary detach started in addScrapView().
		child.dispatchFinishTemporaryDetach();
		} else {
		// we set isScrap to "true" only if the view is temporarily detached.
		// if the view is fully detached, it is as good as a view created by the
		// adapter
		isScrap[0] = false;
		}

		}
		}

core/java/android/widget/GridView.java

+57 −50

Original line number	Diff line number	Diff line
		@@ -1407,72 +1407,73 @@ public class GridView extends AbsListView {


		/**
		* Obtain the view and add it to our list of children. The view can be made
		* fresh, converted from an unused view, or used as is if it was in the
		* recycle bin.
		*
		* @param position Logical position in the list
		* @param y Top or bottom edge of the view to add
		* @param flow if true, align top edge to y. If false, align bottom edge to
		* y.
		* @param childrenLeft Left edge where children should be positioned
		* @param selected Is this position selected?
		* @param where to add new item in the list
		* Obtains the view and adds it to our list of children. The view can be
		* made fresh, converted from an unused view, or used as is if it was in
		* the recycle bin.
		*
		* @param position logical position in the list
		* @param y top or bottom edge of the view to add
		* @param flow {@code true} to align top edge to y, {@code false} to align
		* bottom edge to y
		* @param childrenLeft left edge where children should be positioned
		* @param selected {@code true} if the position is selected, {@code false}
		* otherwise
		* @param where position at which to add new item in the list
		* @return View that was added
		*/
		private View makeAndAddView(int position, int y, boolean flow, int childrenLeft,
		boolean selected, int where) {
		View child;

		if (!mDataChanged) {
		// Try to use an existing view for this position
		child = mRecycler.getActiveView(position);
		if (child != null) {
		final View activeView = mRecycler.getActiveView(position);
		if (activeView != null) {
		// Found it -- we're using an existing child
		// This just needs to be positioned
		setupChild(child, position, y, flow, childrenLeft, selected, true, where);
		return child;
		setupChild(activeView, position, y, flow, childrenLeft, selected, true, where);
		return activeView;
		}
		}

		// Make a new view for this position, or convert an unused view if
		// possible
		child = obtainView(position, mIsScrap);
		// possible.
		final View child = obtainView(position, mIsScrap);

		// This needs to be positioned and measured
		// This needs to be positioned and measured.
		setupChild(child, position, y, flow, childrenLeft, selected, mIsScrap[0], where);

		return child;
		}

		/**
		* Add a view as a child and make sure it is measured (if necessary) and
		* Adds a view as a child and make sure it is measured (if necessary) and
		* positioned properly.
		*
		* @param child The view to add
		* @param position The position of the view
		* @param y The y position relative to which this view will be positioned
		* @param flow if true, align top edge to y. If false, align bottom edge
		* to y.
		* @param childrenLeft Left edge where children should be positioned
		* @param selected Is this position selected?
		* @param recycled Has this view been pulled from the recycle bin? If so it
		* does not need to be remeasured.
		* @param where Where to add the item in the list
		* @param child the view to add
		* @param position the position of this child
		* @param y the y position relative to which this view will be positioned
		* @param flowDown {@code true} to align top edge to y, {@code false} to
		* align bottom edge to y
		* @param childrenLeft left edge where children should be positioned
		* @param selected {@code true} if the position is selected, {@code false}
		* otherwise
		* @param isAttachedToWindow {@code true} if the view is already attached
		* to the window, e.g. whether it was reused, or
		* {@code false} otherwise
		* @param where position at which to add new item in the list
		*
		*/
		private void setupChild(View child, int position, int y, boolean flow, int childrenLeft,
		boolean selected, boolean recycled, int where) {
		private void setupChild(View child, int position, int y, boolean flowDown, int childrenLeft,
		boolean selected, boolean isAttachedToWindow, int where) {
		Trace.traceBegin(Trace.TRACE_TAG_VIEW, "setupGridItem");

		boolean isSelected = selected && shouldShowSelector();
		final boolean updateChildSelected = isSelected != child.isSelected();
		final int mode = mTouchMode;
		final boolean isPressed = mode > TOUCH_MODE_DOWN && mode < TOUCH_MODE_SCROLL &&
		mMotionPosition == position;
		final boolean isPressed = mode > TOUCH_MODE_DOWN && mode < TOUCH_MODE_SCROLL
		&& mMotionPosition == position;
		final boolean updateChildPressed = isPressed != child.isPressed();

		boolean needToMeasure = !recycled \|\| updateChildSelected \|\| child.isLayoutRequested();
		final boolean needToMeasure = !isAttachedToWindow \|\| updateChildSelected
		\|\| child.isLayoutRequested();

		// Respect layout params that are already in the view. Otherwise make
		// some up...
		@@ -1483,13 +1484,9 @@ public class GridView extends AbsListView {
		p.viewType = mAdapter.getItemViewType(position);
		p.isEnabled = mAdapter.isEnabled(position);

		if (recycled && !p.forceAdd) {
		attachViewToParent(child, where, p);
		} else {
		p.forceAdd = false;
		addViewInLayout(child, where, p, true);
		}

		// Set up view state before attaching the view, since we may need to
		// rely on the jumpDrawablesToCurrentState() call that occurs as part
		// of view attachment.
		if (updateChildSelected) {
		child.setSelected(isSelected);
		if (isSelected) {
		@@ -1510,6 +1507,21 @@ public class GridView extends AbsListView {
		}
		}

		if (isAttachedToWindow && !p.forceAdd) {
		attachViewToParent(child, where, p);

		// If the view isn't attached, or if it's attached but for a different
		// position, then jump the drawables.
		if (!isAttachedToWindow
		\|\| (((AbsListView.LayoutParams) child.getLayoutParams()).scrappedFromPosition)
		!= position) {
		child.jumpDrawablesToCurrentState();
		}
		} else {
		p.forceAdd = false;
		addViewInLayout(child, where, p, true);
		}

		if (needToMeasure) {
		int childHeightSpec = ViewGroup.getChildMeasureSpec(
		MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), 0, p.height);
		@@ -1525,7 +1537,7 @@ public class GridView extends AbsListView {
		final int h = child.getMeasuredHeight();

		int childLeft;
		final int childTop = flow ? y : y - h;
		final int childTop = flowDown ? y : y - h;

		final int layoutDirection = getLayoutDirection();
		final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
		@@ -1553,15 +1565,10 @@ public class GridView extends AbsListView {
		child.offsetTopAndBottom(childTop - child.getTop());
		}

		if (mCachingStarted) {
		if (mCachingStarted && !child.isDrawingCacheEnabled()) {
		child.setDrawingCacheEnabled(true);
		}

		if (recycled && (((AbsListView.LayoutParams)child.getLayoutParams()).scrappedFromPosition)
		!= position) {
		child.jumpDrawablesToCurrentState();
		}

		Trace.traceEnd(Trace.TRACE_TAG_VIEW);
		}

core/java/android/widget/ListView.java

+63 −56

Original line number	Diff line number	Diff line
		@@ -1939,72 +1939,73 @@ public class ListView extends AbsListView {
		}

		/**
		* Obtain the view and add it to our list of children. The view can be made
		* fresh, converted from an unused view, or used as is if it was in the
		* recycle bin.
		*
		* @param position Logical position in the list
		* @param y Top or bottom edge of the view to add
		* @param flow If flow is true, align top edge to y. If false, align bottom
		* edge to y.
		* @param childrenLeft Left edge where children should be positioned
		* @param selected Is this position selected?
		* @return View that was added
		* Obtains the view and adds it to our list of children. The view can be
		* made fresh, converted from an unused view, or used as is if it was in
		* the recycle bin.
		*
		* @param position logical position in the list
		* @param y top or bottom edge of the view to add
		* @param flow {@code true} to align top edge to y, {@code false} to align
		* bottom edge to y
		* @param childrenLeft left edge where children should be positioned
		* @param selected {@code true} if the position is selected, {@code false}
		* otherwise
		* @return the view that was added
		*/
		private View makeAndAddView(int position, int y, boolean flow, int childrenLeft,
		boolean selected) {
		View child;


		if (!mDataChanged) {
		// Try to use an existing view for this position
		child = mRecycler.getActiveView(position);
		if (child != null) {
		// Found it -- we're using an existing child
		// This just needs to be positioned
		setupChild(child, position, y, flow, childrenLeft, selected, true);

		return child;
		// Try to use an existing view for this position.
		final View activeView = mRecycler.getActiveView(position);
		if (activeView != null) {
		// Found it. We're reusing an existing child, so it just needs
		// to be positioned like a scrap view.
		setupChild(activeView, position, y, flow, childrenLeft, selected, true);
		return activeView;
		}
		}

		// Make a new view for this position, or convert an unused view if possible
		child = obtainView(position, mIsScrap);
		// Make a new view for this position, or convert an unused view if
		// possible.
		final View child = obtainView(position, mIsScrap);

		// This needs to be positioned and measured
		// This needs to be positioned and measured.
		setupChild(child, position, y, flow, childrenLeft, selected, mIsScrap[0]);

		return child;
		}

		/**
		* Add a view as a child and make sure it is measured (if necessary) and
		* Adds a view as a child and make sure it is measured (if necessary) and
		* positioned properly.
		*
		* @param child The view to add
		* @param position The position of this child
		* @param y The y position relative to which this view will be positioned
		* @param flowDown If true, align top edge to y. If false, align bottom
		* edge to y.
		* @param childrenLeft Left edge where children should be positioned
		* @param selected Is this position selected?
		* @param recycled Has this view been pulled from the recycle bin? If so it
		* does not need to be remeasured.
		* @param child the view to add
		* @param position the position of this child
		* @param y the y position relative to which this view will be positioned
		* @param flowDown {@code true} to align top edge to y, {@code false} to
		* align bottom edge to y
		* @param childrenLeft left edge where children should be positioned
		* @param selected {@code true} if the position is selected, {@code false}
		* otherwise
		* @param isAttachedToWindow {@code true} if the view is already attached
		* to the window, e.g. whether it was reused, or
		* {@code false} otherwise
		*/
		private void setupChild(View child, int position, int y, boolean flowDown, int childrenLeft,
		boolean selected, boolean recycled) {
		boolean selected, boolean isAttachedToWindow) {
		Trace.traceBegin(Trace.TRACE_TAG_VIEW, "setupListItem");

		final boolean isSelected = selected && shouldShowSelector();
		final boolean updateChildSelected = isSelected != child.isSelected();
		final int mode = mTouchMode;
		final boolean isPressed = mode > TOUCH_MODE_DOWN && mode < TOUCH_MODE_SCROLL &&
		mMotionPosition == position;
		final boolean isPressed = mode > TOUCH_MODE_DOWN && mode < TOUCH_MODE_SCROLL
		&& mMotionPosition == position;
		final boolean updateChildPressed = isPressed != child.isPressed();
		final boolean needToMeasure = !recycled \|\| updateChildSelected \|\| child.isLayoutRequested();
		final boolean needToMeasure = !isAttachedToWindow \|\| updateChildSelected
		\|\| child.isLayoutRequested();

		// Respect layout params that are already in the view. Otherwise make some up...
		// noinspection unchecked
		// Respect layout params that are already in the view. Otherwise make
		// some up...
		AbsListView.LayoutParams p = (AbsListView.LayoutParams) child.getLayoutParams();
		if (p == null) {
		p = (AbsListView.LayoutParams) generateDefaultLayoutParams();
		@@ -2012,17 +2013,9 @@ public class ListView extends AbsListView {
		p.viewType = mAdapter.getItemViewType(position);
		p.isEnabled = mAdapter.isEnabled(position);

		if ((recycled && !p.forceAdd) \|\| (p.recycledHeaderFooter
		&& p.viewType == AdapterView.ITEM_VIEW_TYPE_HEADER_OR_FOOTER)) {
		attachViewToParent(child, flowDown ? -1 : 0, p);
		} else {
		p.forceAdd = false;
		if (p.viewType == AdapterView.ITEM_VIEW_TYPE_HEADER_OR_FOOTER) {
		p.recycledHeaderFooter = true;
		}
		addViewInLayout(child, flowDown ? -1 : 0, p, true);
		}

		// Set up view state before attaching the view, since we may need to
		// rely on the jumpDrawablesToCurrentState() call that occurs as part
		// of view attachment.
		if (updateChildSelected) {
		child.setSelected(isSelected);
		}
		@@ -2040,6 +2033,25 @@ public class ListView extends AbsListView {
		}
		}

		if ((isAttachedToWindow && !p.forceAdd) \|\| (p.recycledHeaderFooter
		&& p.viewType == AdapterView.ITEM_VIEW_TYPE_HEADER_OR_FOOTER)) {
		attachViewToParent(child, flowDown ? -1 : 0, p);

		// If the view was previously attached for a different position,
		// then manually jump the drawables.
		if (isAttachedToWindow
		&& (((AbsListView.LayoutParams) child.getLayoutParams()).scrappedFromPosition)
		!= position) {
		child.jumpDrawablesToCurrentState();
		}
		} else {
		p.forceAdd = false;
		if (p.viewType == AdapterView.ITEM_VIEW_TYPE_HEADER_OR_FOOTER) {
		p.recycledHeaderFooter = true;
		}
		addViewInLayout(child, flowDown ? -1 : 0, p, true);
		}

		if (needToMeasure) {
		final int childWidthSpec = ViewGroup.getChildMeasureSpec(mWidthMeasureSpec,
		mListPadding.left + mListPadding.right, p.width);
		@@ -2073,11 +2085,6 @@ public class ListView extends AbsListView {
		child.setDrawingCacheEnabled(true);
		}

		if (recycled && (((AbsListView.LayoutParams)child.getLayoutParams()).scrappedFromPosition)
		!= position) {
		child.jumpDrawablesToCurrentState();
		}

		Trace.traceEnd(Trace.TRACE_TAG_VIEW);
		}