List of usage examples for android.view View clearFocus
public void clearFocus()
From source file:com.zyk.launcher.AsyncTaskCallback.java
public void beginDragShared(View child, DragSource source) { ///*from ww w .ja v a 2s .c om*/ child.clearFocus(); //??false?false? child.setPressed(false); //??????? // The outline is used to visualize where the item will land if dropped mDragOutline = createDragOutline(child, Workspace.DRAG_BITMAP_PADDING); // mLauncher.onDragStarted(child); // The drag bitmap follows the touch point around on the screen AtomicInteger padding = new AtomicInteger(Workspace.DRAG_BITMAP_PADDING); final Bitmap b = Utils.createDragBitmap(child, padding); final int bmpWidth = b.getWidth(); final int bmpHeight = b.getHeight(); float scale = mLauncher.getDragLayer().getLocationInDragLayer(child, mTempXY); int dragLayerX = Math.round(mTempXY[0] - (bmpWidth - scale * child.getWidth()) / 2); int dragLayerY = Math.round(mTempXY[1] - (bmpHeight - scale * bmpHeight) / 2 - padding.get() / 2); LauncherAppState app = LauncherAppState.getInstance(); DeviceProfile grid = app.getDynamicGrid().getDeviceProfile(); Point dragVisualizeOffset = null; Rect dragRect = null; if (child instanceof BubbleTextView) { int iconSize = grid.iconSizePx; int top = child.getPaddingTop(); int left = (bmpWidth - iconSize) / 2; int right = left + iconSize; int bottom = top + iconSize; dragLayerY += top; // Note: The drag region is used to calculate drag layer offsets, but the // dragVisualizeOffset in addition to the dragRect (the size) to position the outline. dragVisualizeOffset = new Point(-padding.get() / 2, padding.get() / 2); dragRect = new Rect(left, top, right, bottom); } else if (child instanceof FolderIcon) { int previewSize = grid.folderIconSizePx; dragRect = new Rect(0, child.getPaddingTop(), child.getWidth(), previewSize); } // Clear the pressed state if necessary if (child instanceof BubbleTextView) { BubbleTextView icon = (BubbleTextView) child; icon.clearPressedBackground(); } if (child.getTag() == null || !(child.getTag() instanceof ItemInfo)) { String msg = "Drag started with a view that has no tag set. This " + "will cause a crash (issue 11627249) down the line. " + "View: " + child + " tag: " + child.getTag(); throw new IllegalStateException(msg); } DragView dv = mDragController.startDrag(b, dragLayerX, dragLayerY, source, child.getTag(), DragController.DRAG_ACTION_MOVE, dragVisualizeOffset, dragRect, scale); dv.setIntrinsicIconScaleFactor(source.getIntrinsicIconScaleFactor()); if (child.getParent() instanceof ShortcutAndWidgetContainer) { mDragSourceInternal = (ShortcutAndWidgetContainer) child.getParent(); } b.recycle(); }
From source file:org.bangbang.support.v4.widget.HListView.java
/** * Handle an arrow scroll going up or down. Take into account whether items are selectable, * whether there are focusable items etc. */* w ww . j a v a2s. co m*/ * @param direction Either {@link android.view.View#FOCUS_UP} or {@link android.view.View#FOCUS_DOWN}. * @return Whether any scrolling, selection or focus change occured. */ private boolean arrowScrollImpl(int direction) { if (getChildCount() <= 0) { return false; } View selectedView = getSelectedView(); int nextSelectedPosition = lookForSelectablePositionOnScreen(direction); int amountToScroll = amountToScroll(direction, nextSelectedPosition); // if we are moving focus, we may OVERRIDE the default behavior final ArrowScrollFocusResult focusResult = mItemsCanFocus ? arrowScrollFocused(direction) : null; if (focusResult != null) { nextSelectedPosition = focusResult.getSelectedPosition(); amountToScroll = focusResult.getAmountToScroll(); } boolean needToRedraw = focusResult != null; if (nextSelectedPosition != INVALID_POSITION) { handleNewSelectionChange(selectedView, direction, nextSelectedPosition, focusResult != null); setSelectedPositionInt(nextSelectedPosition); setNextSelectedPositionInt(nextSelectedPosition); selectedView = getSelectedView(); if (mItemsCanFocus && focusResult == null) { // there was no new view found to take focus, make sure we // don't leave focus with the old selection final View focused = getFocusedChild(); if (focused != null) { focused.clearFocus(); } } needToRedraw = true; checkSelectionChanged(); } if (amountToScroll > 0) { scrollListItemsBy((direction == View.FOCUS_LEFT) ? amountToScroll : -amountToScroll); needToRedraw = true; } // if we didn't find a new focusable, make sure any existing focused // item that was panned off screen gives up focus. if (mItemsCanFocus && (focusResult == null) && selectedView != null && selectedView.hasFocus()) { final View focused = selectedView.findFocus(); if (distanceToView(focused) > 0) { focused.clearFocus(); } } // if the current selection is panned off, we need to remove the selection if (nextSelectedPosition == INVALID_POSITION && selectedView != null && !isViewAncestorOf(selectedView, this)) { selectedView = null; hideSelector(); // but we don't want to set the ressurect position (that would make subsequent // unhandled key events bring back the item we just scrolled off!) mResurrectToPosition = INVALID_POSITION; } if (needToRedraw) { if (selectedView != null) { positionSelector(selectedView); mSelectedTop = selectedView.getTop(); } invalidate(); invokeOnItemScrollListener(); return true; } return false; }
From source file:org.bangbang.support.v4.widget.HListView.java
@Override
protected void layoutChildren() {
final boolean blockLayoutRequests = mBlockLayoutRequests;
if (!blockLayoutRequests) {
mBlockLayoutRequests = true;
} else {//from ww w. j av a 2s.c om
return;
}
try {
super.layoutChildren();
invalidate();
if (mAdapter == null) {
resetList();
invokeOnItemScrollListener();
return;
}
int childrenLeft = mListPadding.left;
int childrenRight = getRight() - getLeft() - mListPadding.right;
int childCount = getChildCount();
int index;
int delta = 0;
View sel;
View oldSel = null;
View oldFirst = null;
View newSel = null;
View focusLayoutRestoreView = null;
// Remember stuff we will need down below
switch (mLayoutMode) {
case LAYOUT_SET_SELECTION:
index = mNextSelectedPosition - mFirstPosition;
if (index >= 0 && index < childCount) {
newSel = getChildAt(index);
}
break;
case LAYOUT_FORCE_TOP:
case LAYOUT_FORCE_BOTTOM:
case LAYOUT_SPECIFIC:
case LAYOUT_SYNC:
break;
case LAYOUT_MOVE_SELECTION:
default:
// Remember the previously selected view
index = mSelectedPosition - mFirstPosition;
if (index >= 0 && index < childCount) {
oldSel = getChildAt(index);
}
// Remember the previous first child
oldFirst = getChildAt(0);
if (mNextSelectedPosition >= 0) {
delta = mNextSelectedPosition - mSelectedPosition;
}
// Caution: newSel might be null
newSel = getChildAt(index + delta);
}
boolean dataChanged = mDataChanged;
if (dataChanged) {
handleDataChanged();
}
// Handle the empty set by removing all views that are visible
// and calling it a day
if (mItemCount == 0) {
resetList();
invokeOnItemScrollListener();
return;
} else if (mItemCount != mAdapter.getCount()) {
throw new IllegalStateException("The content of the adapter has changed but "
+ "ListView did not receive a notification. Make sure the content of "
+ "your adapter is not modified from a background thread, but only "
+ "from the UI thread.");
}
setSelectedPositionInt(mNextSelectedPosition);
// Pull all children into the RecycleBin.
// These views will be reused if possible
final int firstPosition = mFirstPosition;
final RecycleBin recycleBin = mRecycler;
// reset the focus restoration
View focusLayoutRestoreDirectChild = null;
// Don't put header or footer views into the Recycler. Those are
// already cached in mHeaderViews;
if (dataChanged) {
for (int i = 0; i < childCount; i++) {
recycleBin.addScrapView(getChildAt(i));
if (ViewDebug.TRACE_RECYCLER) {
ViewDebug.trace(getChildAt(i), ViewDebug.RecyclerTraceType.MOVE_TO_SCRAP_HEAP, index, i);
}
}
} else {
recycleBin.fillActiveViews(childCount, firstPosition);
}
// take focus back to us temporarily to avoid the eventual
// call to clear focus when removing the focused child below
// from messing things up when ViewRoot assigns focus back
// to someone else
final View focusedChild = getFocusedChild();
if (focusedChild != null) {
// TODO: in some cases focusedChild.getParent() == null
// we can remember the focused view to restore after relayout if the
// data hasn't changed, or if the focused position is a header or footer
if (!dataChanged || isDirectChildHeaderOrFooter(focusedChild)) {
focusLayoutRestoreDirectChild = focusedChild;
// remember the specific view that had focus
focusLayoutRestoreView = findFocus();
if (focusLayoutRestoreView != null) {
// tell it we are going to mess with it
focusLayoutRestoreView.onStartTemporaryDetach();
}
}
requestFocus();
}
// Clear out old views
//removeAllViewsInLayout();
detachAllViewsFromParent();
switch (mLayoutMode) {
case LAYOUT_SET_SELECTION:
if (newSel != null) {
sel = fillFromSelection(newSel.getLeft(), childrenLeft, childrenRight);
} else {
sel = fillFromMiddle(childrenLeft, childrenRight);
}
break;
case LAYOUT_SYNC:
sel = fillSpecific(mSyncPosition, mSpecificTop);
break;
case LAYOUT_FORCE_BOTTOM:
sel = fillUp(mItemCount - 1, childrenRight);
adjustViewsUpOrDown();
break;
case LAYOUT_FORCE_TOP:
mFirstPosition = 0;
sel = fillFromTop(childrenLeft);
adjustViewsUpOrDown();
break;
case LAYOUT_SPECIFIC:
sel = fillSpecific(reconcileSelectedPosition(), mSpecificLeft);
break;
case LAYOUT_MOVE_SELECTION:
sel = moveSelection(oldSel, newSel, delta, childrenLeft, childrenRight);
break;
default:
if (childCount == 0) {
if (!mStackFromBottom) {
final int position = lookForSelectablePosition(0, true);
setSelectedPositionInt(position);
sel = fillFromTop(childrenLeft);
} else {
final int position = lookForSelectablePosition(mItemCount - 1, false);
setSelectedPositionInt(position);
sel = fillUp(mItemCount - 1, childrenRight);
}
} else {
if (mSelectedPosition >= 0 && mSelectedPosition < mItemCount) {
sel = fillSpecific(mSelectedPosition, oldSel == null ? childrenLeft : oldSel.getLeft());
} else if (mFirstPosition < mItemCount) {
sel = fillSpecific(mFirstPosition, oldFirst == null ? childrenLeft : oldFirst.getLeft());
} else {
sel = fillSpecific(0, childrenLeft);
}
}
break;
}
// Flush any cached views that did not get reused above
recycleBin.scrapActiveViews();
if (sel != null) {
// the current selected item should get focus if items
// are focusable
if (mItemsCanFocus && hasFocus() && !sel.hasFocus()) {
final boolean focusWasTaken = (sel == focusLayoutRestoreDirectChild
&& focusLayoutRestoreView.requestFocus()) || sel.requestFocus();
if (!focusWasTaken) {
// selected item didn't take focus, fine, but still want
// to make sure something else outside of the selected view
// has focus
final View focused = getFocusedChild();
if (focused != null) {
focused.clearFocus();
}
positionSelector(sel);
} else {
sel.setSelected(false);
mSelectorRect.setEmpty();
}
} else {
positionSelector(sel);
}
mSelectedTop = sel.getTop();
} else {
mSelectedTop = 0;
mSelectorRect.setEmpty();
// even if there is not selected position, we may need to restore
// focus (i.e. something focusable in touch mode)
if (hasFocus() && focusLayoutRestoreView != null) {
focusLayoutRestoreView.requestFocus();
}
}
// tell focus view we are done mucking with it, if it is still in
// our view hierarchy.
if (focusLayoutRestoreView != null && focusLayoutRestoreView.getWindowToken() != null) {
focusLayoutRestoreView.onFinishTemporaryDetach();
}
mLayoutMode = LAYOUT_NORMAL;
mDataChanged = false;
mNeedSync = false;
setNextSelectedPositionInt(mSelectedPosition);
updateScrollIndicators();
if (mItemCount > 0) {
checkSelectionChanged();
}
invokeOnItemScrollListener();
} finally {
if (!blockLayoutRequests) {
mBlockLayoutRequests = false;
}
}
}
From source file:com.appunite.list.HorizontalListView.java
/** * Handle an arrow scroll going up or down. Take into account whether items are selectable, * whether there are focusable items etc. * * @param direction Either {@link android.view.View#FOCUS_LEFT} or {@link android.view.View#FOCUS_RIGHT}. * @return Whether any scrolling, selection or focus change occured. *///from w w w . jav a2 s. c o m private boolean arrowScrollImpl(int direction) { if (getChildCount() <= 0) { return false; } View selectedView = getSelectedView(); int selectedPos = mSelectedPosition; int nextSelectedPosition = (direction == View.FOCUS_RIGHT) ? lookForSelectablePosition(selectedPos + 1, true) : lookForSelectablePosition(selectedPos - 1, false); int amountToScroll = amountToScroll(direction, nextSelectedPosition); // if we are moving focus, we may OVERRIDE the default behavior final ArrowScrollFocusResult focusResult = mItemsCanFocus ? arrowScrollFocused(direction) : null; if (focusResult != null) { nextSelectedPosition = focusResult.getSelectedPosition(); amountToScroll = focusResult.getAmountToScroll(); } boolean needToRedraw = focusResult != null; if (nextSelectedPosition != INVALID_POSITION) { handleNewSelectionChange(selectedView, direction, nextSelectedPosition, focusResult != null); setSelectedPositionInt(nextSelectedPosition); setNextSelectedPositionInt(nextSelectedPosition); selectedView = getSelectedView(); selectedPos = nextSelectedPosition; if (mItemsCanFocus && focusResult == null) { // there was no new view found to take focus, make sure we // don't leave focus with the old selection final View focused = getFocusedChild(); if (focused != null) { focused.clearFocus(); } } needToRedraw = true; checkSelectionChanged(); } if (amountToScroll > 0) { scrollListItemsBy((direction == View.FOCUS_UP) ? amountToScroll : -amountToScroll); needToRedraw = true; } // if we didn't find a new focusable, make sure any existing focused // item that was panned off screen gives up focus. if (mItemsCanFocus && (focusResult == null) && selectedView != null && selectedView.hasFocus()) { final View focused = selectedView.findFocus(); if (!isViewAncestorOf(focused, this) || distanceToView(focused) > 0) { focused.clearFocus(); } } // if the current selection is panned off, we need to remove the selection if (nextSelectedPosition == INVALID_POSITION && selectedView != null && !isViewAncestorOf(selectedView, this)) { selectedView = null; hideSelector(); // but we don't want to set the ressurect position (that would make subsequent // unhandled key events bring back the item we just scrolled off!) mResurrectToPosition = INVALID_POSITION; } if (needToRedraw) { if (selectedView != null) { positionSelector(selectedPos, selectedView); mSelectedLeft = selectedView.getLeft(); } if (!awakenScrollBars()) { invalidate(); } invokeOnItemScrollListener(); return true; } return false; }
From source file:com.awrtechnologies.carbudgetsales.hlistview.widget.HListView.java
/** * Handle an arrow scroll going up or down. Take into account whether items are selectable, whether there are focusable items * etc.// ww w . ja v a 2s. c om * * @param direction * Either {@link android.view.View#FOCUS_UP} or {@link android.view.View#FOCUS_DOWN}. * @return Whether any scrolling, selection or focus change occured. */ private boolean arrowScrollImpl(int direction) { if (getChildCount() <= 0) { return false; } View selectedView = getSelectedView(); int selectedPos = mSelectedPosition; int nextSelectedPosition = lookForSelectablePositionOnScreen(direction); int amountToScroll = amountToScroll(direction, nextSelectedPosition); // if we are moving focus, we may OVERRIDE the default behavior final ArrowScrollFocusResult focusResult = mItemsCanFocus ? arrowScrollFocused(direction) : null; if (focusResult != null) { nextSelectedPosition = focusResult.getSelectedPosition(); amountToScroll = focusResult.getAmountToScroll(); } boolean needToRedraw = focusResult != null; if (nextSelectedPosition != INVALID_POSITION) { handleNewSelectionChange(selectedView, direction, nextSelectedPosition, focusResult != null); setSelectedPositionInt(nextSelectedPosition); setNextSelectedPositionInt(nextSelectedPosition); selectedView = getSelectedView(); selectedPos = nextSelectedPosition; if (mItemsCanFocus && focusResult == null) { // there was no new view found to take focus, make sure we // don't leave focus with the old selection final View focused = getFocusedChild(); if (focused != null) { focused.clearFocus(); } } needToRedraw = true; checkSelectionChanged(); } if (amountToScroll > 0) { scrollListItemsBy((direction == View.FOCUS_UP) ? amountToScroll : -amountToScroll); needToRedraw = true; } // if we didn't find a new focusable, make sure any existing focused // item that was panned off screen gives up focus. if (mItemsCanFocus && (focusResult == null) && selectedView != null && selectedView.hasFocus()) { final View focused = selectedView.findFocus(); if (!isViewAncestorOf(focused, this) || distanceToView(focused) > 0) { focused.clearFocus(); } } // if the current selection is panned off, we need to remove the selection if (nextSelectedPosition == INVALID_POSITION && selectedView != null && !isViewAncestorOf(selectedView, this)) { selectedView = null; hideSelector(); // but we don't want to set the ressurect position (that would make subsequent // unhandled key events bring back the item we just scrolled off!) mResurrectToPosition = INVALID_POSITION; } if (needToRedraw) { if (selectedView != null) { positionSelector(selectedPos, selectedView); mSelectedLeft = selectedView.getLeft(); } if (!awakenScrollBars()) { invalidate(); } invokeOnItemScrollListener(); return true; } return false; }
From source file:com.appunite.list.ListView.java
/** * Handle an arrow scroll going up or down. Take into account whether items are selectable, * whether there are focusable items etc. * * @param direction Either {@link android.view.View#FOCUS_UP} or {@link android.view.View#FOCUS_DOWN}. * @return Whether any scrolling, selection or focus change occured. *//*from www. ja v a 2 s .c o m*/ private boolean arrowScrollImpl(int direction) { if (getChildCount() <= 0) { return false; } View selectedView = getSelectedView(); int selectedPos = mSelectedPosition; int nextSelectedPosition = (direction == View.FOCUS_DOWN) ? lookForSelectablePosition(selectedPos + 1, true) : lookForSelectablePosition(selectedPos - 1, false); int amountToScroll = amountToScroll(direction, nextSelectedPosition); // if we are moving focus, we may OVERRIDE the default behavior final ArrowScrollFocusResult focusResult = mItemsCanFocus ? arrowScrollFocused(direction) : null; if (focusResult != null) { nextSelectedPosition = focusResult.getSelectedPosition(); amountToScroll = focusResult.getAmountToScroll(); } boolean needToRedraw = focusResult != null; if (nextSelectedPosition != INVALID_POSITION) { handleNewSelectionChange(selectedView, direction, nextSelectedPosition, focusResult != null); setSelectedPositionInt(nextSelectedPosition); setNextSelectedPositionInt(nextSelectedPosition); selectedView = getSelectedView(); selectedPos = nextSelectedPosition; if (mItemsCanFocus && focusResult == null) { // there was no new view found to take focus, make sure we // don't leave focus with the old selection final View focused = getFocusedChild(); if (focused != null) { focused.clearFocus(); } } needToRedraw = true; checkSelectionChanged(); } if (amountToScroll > 0) { scrollListItemsBy((direction == View.FOCUS_UP) ? amountToScroll : -amountToScroll); needToRedraw = true; } // if we didn't find a new focusable, make sure any existing focused // item that was panned off screen gives up focus. if (mItemsCanFocus && (focusResult == null) && selectedView != null && selectedView.hasFocus()) { final View focused = selectedView.findFocus(); if (!isViewAncestorOf(focused, this) || distanceToView(focused) > 0) { focused.clearFocus(); } } // if the current selection is panned off, we need to remove the selection if (nextSelectedPosition == INVALID_POSITION && selectedView != null && !isViewAncestorOf(selectedView, this)) { selectedView = null; hideSelector(); // but we don't want to set the ressurect position (that would make subsequent // unhandled key events bring back the item we just scrolled off!) mResurrectToPosition = INVALID_POSITION; } if (needToRedraw) { if (selectedView != null) { positionSelector(selectedPos, selectedView); mSelectedTop = selectedView.getTop(); } if (!awakenScrollBars()) { invalidate(); } invokeOnItemScrollListener(); return true; } return false; }
From source file:com.awrtechnologies.valor.valorfireplace.hlistview.widget.HListView.java
@Override protected void layoutChildren() { final boolean blockLayoutRequests = mBlockLayoutRequests; if (!blockLayoutRequests) { mBlockLayoutRequests = true;/* w ww. j av a 2s.c o m*/ } else { return; } try { super.layoutChildren(); invalidate(); if (mAdapter == null) { resetList(); invokeOnItemScrollListener(); return; } int childrenLeft = mListPadding.left; int childrenRight = getRight() - getLeft() - mListPadding.right; int childCount = getChildCount(); int index = 0; int delta = 0; View sel; View oldSel = null; View oldFirst = null; View newSel = null; View focusLayoutRestoreView = null; // AccessibilityNodeInfo accessibilityFocusLayoutRestoreNode = null; // View accessibilityFocusLayoutRestoreView = null; // int accessibilityFocusPosition = INVALID_POSITION; // Remember stuff we will need down below switch (mLayoutMode) { case LAYOUT_SET_SELECTION: index = mNextSelectedPosition - mFirstPosition; if (index >= 0 && index < childCount) { newSel = getChildAt(index); } break; case LAYOUT_FORCE_LEFT: case LAYOUT_FORCE_RIGHT: case LAYOUT_SPECIFIC: case LAYOUT_SYNC: break; case LAYOUT_MOVE_SELECTION: default: // Remember the previously selected view index = mSelectedPosition - mFirstPosition; if (index >= 0 && index < childCount) { oldSel = getChildAt(index); } // Remember the previous first child oldFirst = getChildAt(0); if (mNextSelectedPosition >= 0) { delta = mNextSelectedPosition - mSelectedPosition; } // Caution: newSel might be null newSel = getChildAt(index + delta); } boolean dataChanged = mDataChanged; if (dataChanged) { handleDataChanged(); } // Handle the empty set by removing all views that are visible // and calling it a day if (mItemCount == 0) { resetList(); invokeOnItemScrollListener(); return; } else if (mItemCount != mAdapter.getCount()) { throw new IllegalStateException("The content of the adapter has changed but " + "ListView did not receive a notification. Make sure the content of " + "your adapter is not modified from a background thread, but only " + "from the UI thread. [in ListView(" + getId() + ", " + getClass() + ") with Adapter(" + mAdapter.getClass() + ")]"); } setSelectedPositionInt(mNextSelectedPosition); // Pull all children into the RecycleBin. // These views will be reused if possible final int firstPosition = mFirstPosition; final RecycleBin recycleBin = mRecycler; // reset the focus restoration View focusLayoutRestoreDirectChild = null; // Don't put header or footer views into the Recycler. Those are // already cached in mHeaderViews; if (dataChanged) { for (int i = 0; i < childCount; i++) { recycleBin.addScrapView(getChildAt(i), firstPosition + i); } } else { recycleBin.fillActiveViews(childCount, firstPosition); } // take focus back to us temporarily to avoid the eventual // call to clear focus when removing the focused child below // from messing things up when ViewAncestor assigns focus back // to someone else final View focusedChild = getFocusedChild(); if (focusedChild != null) { // TODO: in some cases focusedChild.getParent() == null // we can remember the focused view to restore after relayout if the // data hasn't changed, or if the focused position is a header or footer if (!dataChanged || isDirectChildHeaderOrFooter(focusedChild)) { focusLayoutRestoreDirectChild = focusedChild; // remember the specific view that had focus focusLayoutRestoreView = findFocus(); if (focusLayoutRestoreView != null) { // tell it we are going to mess with it focusLayoutRestoreView.onStartTemporaryDetach(); } } requestFocus(); } /* * // Remember which child, if any, had accessibility focus. final ViewRootImpl viewRootImpl = getViewRootImpl(); if ( * viewRootImpl != null ) { final View accessFocusedView = viewRootImpl.getAccessibilityFocusedHost(); if ( * accessFocusedView != null ) { final View accessFocusedChild = findAccessibilityFocusedChild( accessFocusedView ); if ( * accessFocusedChild != null ) { if ( !dataChanged || isDirectChildHeaderOrFooter( accessFocusedChild ) ) { // If the * views won't be changing, try to maintain // focus on the current view host and (if // applicable) its virtual view. * accessibilityFocusLayoutRestoreView = accessFocusedView; accessibilityFocusLayoutRestoreNode = viewRootImpl * .getAccessibilityFocusedVirtualView(); } else { // Otherwise, try to maintain focus at the same // position. * accessibilityFocusPosition = getPositionForView( accessFocusedChild ); } } } } */ // Clear out old views detachAllViewsFromParent(); recycleBin.removeSkippedScrap(); switch (mLayoutMode) { case LAYOUT_SET_SELECTION: if (newSel != null) { sel = fillFromSelection(newSel.getLeft(), childrenLeft, childrenRight); } else { sel = fillFromMiddle(childrenLeft, childrenRight); } break; case LAYOUT_SYNC: sel = fillSpecific(mSyncPosition, mSpecificLeft); break; case LAYOUT_FORCE_RIGHT: sel = fillLeft(mItemCount - 1, childrenRight); adjustViewsLeftOrRight(); break; case LAYOUT_FORCE_LEFT: mFirstPosition = 0; sel = fillFromLeft(childrenLeft); adjustViewsLeftOrRight(); break; case LAYOUT_SPECIFIC: sel = fillSpecific(reconcileSelectedPosition(), mSpecificLeft); break; case LAYOUT_MOVE_SELECTION: sel = moveSelection(oldSel, newSel, delta, childrenLeft, childrenRight); break; default: if (childCount == 0) { if (!mStackFromRight) { final int position = lookForSelectablePosition(0, true); setSelectedPositionInt(position); sel = fillFromLeft(childrenLeft); } else { final int position = lookForSelectablePosition(mItemCount - 1, false); setSelectedPositionInt(position); sel = fillLeft(mItemCount - 1, childrenRight); } } else { if (mSelectedPosition >= 0 && mSelectedPosition < mItemCount) { sel = fillSpecific(mSelectedPosition, oldSel == null ? childrenLeft : oldSel.getLeft()); } else if (mFirstPosition < mItemCount) { sel = fillSpecific(mFirstPosition, oldFirst == null ? childrenLeft : oldFirst.getLeft()); } else { sel = fillSpecific(0, childrenLeft); } } break; } // Flush any cached views that did not get reused above recycleBin.scrapActiveViews(); if (sel != null) { // the current selected item should get focus if items // are focusable if (mItemsCanFocus && hasFocus() && !sel.hasFocus()) { final boolean focusWasTaken = (sel == focusLayoutRestoreDirectChild && focusLayoutRestoreView != null && focusLayoutRestoreView.requestFocus()) || sel.requestFocus(); if (!focusWasTaken) { // selected item didn't take focus, fine, but still want // to make sure something else outside of the selected view // has focus final View focused = getFocusedChild(); if (focused != null) { focused.clearFocus(); } positionSelector(INVALID_POSITION, sel); } else { sel.setSelected(false); mSelectorRect.setEmpty(); } } else { positionSelector(INVALID_POSITION, sel); } mSelectedLeft = sel.getLeft(); } else { if (mTouchMode > TOUCH_MODE_DOWN && mTouchMode < TOUCH_MODE_SCROLL) { View child = getChildAt(mMotionPosition - mFirstPosition); if (child != null) positionSelector(mMotionPosition, child); } else { mSelectedLeft = 0; mSelectorRect.setEmpty(); } // even if there is not selected position, we may need to restore // focus (i.e. something focusable in touch mode) if (hasFocus() && focusLayoutRestoreView != null) { focusLayoutRestoreView.requestFocus(); } } // Attempt to restore accessibility focus. // if ( accessibilityFocusLayoutRestoreNode != null ) { // accessibilityFocusLayoutRestoreNode.performAction(AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS ); // } else if ( accessibilityFocusLayoutRestoreView != null ) { // this method is marked as hidden. Shame on you google! // accessibilityFocusLayoutRestoreView.requestAccessibilityFocus(); // } else if ( accessibilityFocusPosition != INVALID_POSITION ) { // Bound the position within the visible children. // final int position = MathUtils.constrain( ( accessibilityFocusPosition - mFirstPosition ), 0, ( getChildCount() - 1 ) ); // final View restoreView = getChildAt( position ); // if ( restoreView != null ) { // this method is marked as hidden. Shame on you google! // restoreView.requestAccessibilityFocus(); // } // } // tell focus view we are done mucking with it, if it is still in // our view hierarchy. if (focusLayoutRestoreView != null && focusLayoutRestoreView.getWindowToken() != null) { focusLayoutRestoreView.onFinishTemporaryDetach(); } mLayoutMode = LAYOUT_NORMAL; mDataChanged = false; if (mPositionScrollAfterLayout != null) { post(mPositionScrollAfterLayout); mPositionScrollAfterLayout = null; } mNeedSync = false; setNextSelectedPositionInt(mSelectedPosition); updateScrollIndicators(); if (mItemCount > 0) { checkSelectionChanged(); } invokeOnItemScrollListener(); } finally { if (!blockLayoutRequests) { mBlockLayoutRequests = false; } } }
From source file:com.awrtechnologies.carbudgetsales.hlistview.widget.HListView.java
@Override protected void layoutChildren() { final boolean blockLayoutRequests = mBlockLayoutRequests; if (!blockLayoutRequests) { mBlockLayoutRequests = true;//from ww w . java2 s . com } else { return; } try { super.layoutChildren(); invalidate(); if (mAdapter == null) { resetList(); invokeOnItemScrollListener(); return; } int childrenLeft = mListPadding.left; int childrenRight = getRight() - getLeft() - mListPadding.right; int childCount = getChildCount(); int index = 0; int delta = 0; View sel; View oldSel = null; View oldFirst = null; View newSel = null; View focusLayoutRestoreView = null; // AccessibilityNodeInfo accessibilityFocusLayoutRestoreNode = null; // View accessibilityFocusLayoutRestoreView = null; // int accessibilityFocusPosition = INVALID_POSITION; // Remember stuff we will need down below switch (mLayoutMode) { case LAYOUT_SET_SELECTION: index = mNextSelectedPosition - mFirstPosition; if (index >= 0 && index < childCount) { newSel = getChildAt(index); } break; case LAYOUT_FORCE_LEFT: case LAYOUT_FORCE_RIGHT: case LAYOUT_SPECIFIC: case LAYOUT_SYNC: break; case LAYOUT_MOVE_SELECTION: default: // Remember the previously selected view index = mSelectedPosition - mFirstPosition; if (index >= 0 && index < childCount) { oldSel = getChildAt(index); } // Remember the previous first child oldFirst = getChildAt(0); if (mNextSelectedPosition >= 0) { delta = mNextSelectedPosition - mSelectedPosition; } // Caution: newSel might be null newSel = getChildAt(index + delta); } boolean dataChanged = mDataChanged; if (dataChanged) { handleDataChanged(); } // Handle the empty set by removing all views that are visible // and calling it a day if (mItemCount == 0) { resetList(); invokeOnItemScrollListener(); return; } else if (mItemCount != mAdapter.getCount()) { throw new IllegalStateException( "The content of the com.awrtechnologies.carbudgetsales.adapter has changed but " + "ListView did not receive a notification. Make sure the content of " + "your com.awrtechnologies.carbudgetsales.adapter is not modified from a background thread, but only " + "from the UI thread. [in ListView(" + getId() + ", " + getClass() + ") with Adapter(" + mAdapter.getClass() + ")]"); } setSelectedPositionInt(mNextSelectedPosition); // Pull all children into the RecycleBin. // These views will be reused if possible final int firstPosition = mFirstPosition; final RecycleBin recycleBin = mRecycler; // reset the focus restoration View focusLayoutRestoreDirectChild = null; // Don't put header or footer views into the Recycler. Those are // already cached in mHeaderViews; if (dataChanged) { for (int i = 0; i < childCount; i++) { recycleBin.addScrapView(getChildAt(i), firstPosition + i); } } else { recycleBin.fillActiveViews(childCount, firstPosition); } // take focus back to us temporarily to avoid the eventual // call to clear focus when removing the focused child below // from messing things up when ViewAncestor assigns focus back // to someone else final View focusedChild = getFocusedChild(); if (focusedChild != null) { // TODO: in some cases focusedChild.getParent() == null // we can remember the focused view to restore after relayout if the // com.awrtechnologies.carbudgetsales.data hasn't changed, or if the focused position is a header or footer if (!dataChanged || isDirectChildHeaderOrFooter(focusedChild)) { focusLayoutRestoreDirectChild = focusedChild; // remember the specific view that had focus focusLayoutRestoreView = findFocus(); if (focusLayoutRestoreView != null) { // tell it we are going to mess with it focusLayoutRestoreView.onStartTemporaryDetach(); } } requestFocus(); } /* * // Remember which child, if any, had accessibility focus. final ViewRootImpl viewRootImpl = getViewRootImpl(); if ( * viewRootImpl != null ) { final View accessFocusedView = viewRootImpl.getAccessibilityFocusedHost(); if ( * accessFocusedView != null ) { final View accessFocusedChild = findAccessibilityFocusedChild( accessFocusedView ); if ( * accessFocusedChild != null ) { if ( !dataChanged || isDirectChildHeaderOrFooter( accessFocusedChild ) ) { // If the * views won't be changing, try to maintain // focus on the current view host and (if // applicable) its virtual view. * accessibilityFocusLayoutRestoreView = accessFocusedView; accessibilityFocusLayoutRestoreNode = viewRootImpl * .getAccessibilityFocusedVirtualView(); } else { // Otherwise, try to maintain focus at the same // position. * accessibilityFocusPosition = getPositionForView( accessFocusedChild ); } } } } */ // Clear out old views detachAllViewsFromParent(); recycleBin.removeSkippedScrap(); switch (mLayoutMode) { case LAYOUT_SET_SELECTION: if (newSel != null) { sel = fillFromSelection(newSel.getLeft(), childrenLeft, childrenRight); } else { sel = fillFromMiddle(childrenLeft, childrenRight); } break; case LAYOUT_SYNC: sel = fillSpecific(mSyncPosition, mSpecificLeft); break; case LAYOUT_FORCE_RIGHT: sel = fillLeft(mItemCount - 1, childrenRight); adjustViewsLeftOrRight(); break; case LAYOUT_FORCE_LEFT: mFirstPosition = 0; sel = fillFromLeft(childrenLeft); adjustViewsLeftOrRight(); break; case LAYOUT_SPECIFIC: sel = fillSpecific(reconcileSelectedPosition(), mSpecificLeft); break; case LAYOUT_MOVE_SELECTION: sel = moveSelection(oldSel, newSel, delta, childrenLeft, childrenRight); break; default: if (childCount == 0) { if (!mStackFromRight) { final int position = lookForSelectablePosition(0, true); setSelectedPositionInt(position); sel = fillFromLeft(childrenLeft); } else { final int position = lookForSelectablePosition(mItemCount - 1, false); setSelectedPositionInt(position); sel = fillLeft(mItemCount - 1, childrenRight); } } else { if (mSelectedPosition >= 0 && mSelectedPosition < mItemCount) { sel = fillSpecific(mSelectedPosition, oldSel == null ? childrenLeft : oldSel.getLeft()); } else if (mFirstPosition < mItemCount) { sel = fillSpecific(mFirstPosition, oldFirst == null ? childrenLeft : oldFirst.getLeft()); } else { sel = fillSpecific(0, childrenLeft); } } break; } // Flush any cached views that did not get reused above recycleBin.scrapActiveViews(); if (sel != null) { // the current selected item should get focus if items // are focusable if (mItemsCanFocus && hasFocus() && !sel.hasFocus()) { final boolean focusWasTaken = (sel == focusLayoutRestoreDirectChild && focusLayoutRestoreView != null && focusLayoutRestoreView.requestFocus()) || sel.requestFocus(); if (!focusWasTaken) { // selected item didn't take focus, fine, but still want // to make sure something else outside of the selected view // has focus final View focused = getFocusedChild(); if (focused != null) { focused.clearFocus(); } positionSelector(INVALID_POSITION, sel); } else { sel.setSelected(false); mSelectorRect.setEmpty(); } } else { positionSelector(INVALID_POSITION, sel); } mSelectedLeft = sel.getLeft(); } else { if (mTouchMode > TOUCH_MODE_DOWN && mTouchMode < TOUCH_MODE_SCROLL) { View child = getChildAt(mMotionPosition - mFirstPosition); if (child != null) positionSelector(mMotionPosition, child); } else { mSelectedLeft = 0; mSelectorRect.setEmpty(); } // even if there is not selected position, we may need to restore // focus (i.e. something focusable in touch mode) if (hasFocus() && focusLayoutRestoreView != null) { focusLayoutRestoreView.requestFocus(); } } // Attempt to restore accessibility focus. // if ( accessibilityFocusLayoutRestoreNode != null ) { // accessibilityFocusLayoutRestoreNode.performAction(AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS ); // } else if ( accessibilityFocusLayoutRestoreView != null ) { // this method is marked as hidden. Shame on you google! // accessibilityFocusLayoutRestoreView.requestAccessibilityFocus(); // } else if ( accessibilityFocusPosition != INVALID_POSITION ) { // Bound the position within the visible children. // final int position = MathUtils.constrain( ( accessibilityFocusPosition - mFirstPosition ), 0, ( getChildCount() - 1 ) ); // final View restoreView = getChildAt( position ); // if ( restoreView != null ) { // this method is marked as hidden. Shame on you google! // restoreView.requestAccessibilityFocus(); // } // } // tell focus view we are done mucking with it, if it is still in // our view hierarchy. if (focusLayoutRestoreView != null && focusLayoutRestoreView.getWindowToken() != null) { focusLayoutRestoreView.onFinishTemporaryDetach(); } mLayoutMode = LAYOUT_NORMAL; mDataChanged = false; if (mPositionScrollAfterLayout != null) { post(mPositionScrollAfterLayout); mPositionScrollAfterLayout = null; } mNeedSync = false; setNextSelectedPositionInt(mSelectedPosition); updateScrollIndicators(); if (mItemCount > 0) { checkSelectionChanged(); } invokeOnItemScrollListener(); } finally { if (!blockLayoutRequests) { mBlockLayoutRequests = false; } } }
From source file:com.appunite.list.HorizontalListView.java
@Override protected void layoutChildren() { final boolean blockLayoutRequests = mBlockLayoutRequests; if (!blockLayoutRequests) { mBlockLayoutRequests = true;//from ww w . j a va 2 s .c o m } else { return; } try { super.layoutChildren(); invalidate(); if (mAdapter == null) { resetList(); invokeOnItemScrollListener(); return; } int childrenLeft = mListPadding.left; int childrenRight = getRight() - getLeft() - mListPadding.right; int childCount = getChildCount(); int index = 0; int delta = 0; View sel; View oldSel = null; View oldFirst = null; View newSel = null; View focusLayoutRestoreView = null; AccessibilityNodeInfo accessibilityFocusLayoutRestoreNode = null; View accessibilityFocusLayoutRestoreView = null; int accessibilityFocusPosition = INVALID_POSITION; // Remember stuff we will need down below switch (mLayoutMode) { case LAYOUT_SET_SELECTION: index = mNextSelectedPosition - mFirstPosition; if (index >= 0 && index < childCount) { newSel = getChildAt(index); } break; case LAYOUT_FORCE_LEFT: case LAYOUT_FORCE_RIGHT: case LAYOUT_SPECIFIC: case LAYOUT_SYNC: break; case LAYOUT_MOVE_SELECTION: default: // Remember the previously selected view index = mSelectedPosition - mFirstPosition; if (index >= 0 && index < childCount) { oldSel = getChildAt(index); } // Remember the previous first child oldFirst = getChildAt(0); if (mNextSelectedPosition >= 0) { delta = mNextSelectedPosition - mSelectedPosition; } // Caution: newSel might be null newSel = getChildAt(index + delta); } boolean dataChanged = mDataChanged; if (dataChanged) { handleDataChanged(); } // Handle the empty set by removing all views that are visible // and calling it a day if (mItemCount == 0) { resetList(); invokeOnItemScrollListener(); return; } else if (mItemCount != mAdapter.getCount()) { throw new IllegalStateException("The content of the adapter has changed but " + "ListView did not receive a notification. Make sure the content of " + "your adapter is not modified from a background thread, but only " + "from the UI thread. [in ListView(" + getId() + ", " + getClass() + ") with Adapter(" + mAdapter.getClass() + ")]"); } setSelectedPositionInt(mNextSelectedPosition); // Pull all children into the RecycleBin. // These views will be reused if possible final int firstPosition = mFirstPosition; final RecycleBin recycleBin = mRecycler; // reset the focus restoration View focusLayoutRestoreDirectChild = null; // Don't put header or footer views into the Recycler. Those are // already cached in mHeaderViews; if (dataChanged) { for (int i = 0; i < childCount; i++) { recycleBin.addScrapView(getChildAt(i), firstPosition + i); } } else { recycleBin.fillActiveViews(childCount, firstPosition); } // take focus back to us temporarily to avoid the eventual // call to clear focus when removing the focused child below // from messing things up when ViewAncestor assigns focus back // to someone else final View focusedChild = getFocusedChild(); if (focusedChild != null) { // TODO: in some cases focusedChild.getParent() == null // we can remember the focused view to restore after relayout if the // data hasn't changed, or if the focused position is a header or footer if (!dataChanged || isDirectChildHeaderOrFooter(focusedChild)) { focusLayoutRestoreDirectChild = focusedChild; // remember the specific view that had focus focusLayoutRestoreView = findFocus(); if (focusLayoutRestoreView != null) { // tell it we are going to mess with it focusLayoutRestoreView.onStartTemporaryDetach(); } } requestFocus(); } // TODO We can use those accessability methods, we just remove those (j.m.) // //Remember which child, if any, had accessibility focus. // final ViewRootImpl viewRootImpl = getViewRootImpl(); // if (viewRootImpl != null) { // final View accessFocusedView = viewRootImpl.getAccessibilityFocusedHost(); // if (accessFocusedView != null) { // final View accessFocusedChild = findAccessibilityFocusedChild( // accessFocusedView); // if (accessFocusedChild != null) { // if (!dataChanged || isDirectChildHeaderOrFooter(accessFocusedChild)) { // // If the views won't be changing, try to maintain // // focus on the current view host and (if // // applicable) its virtual view. // accessibilityFocusLayoutRestoreView = accessFocusedView; // accessibilityFocusLayoutRestoreNode = viewRootImpl // .getAccessibilityFocusedVirtualView(); // } else { // // Otherwise, try to maintain focus at the same // // position. // accessibilityFocusPosition = getPositionForView(accessFocusedChild); // } // } // } // } // Clear out old views detachAllViewsFromParent(); recycleBin.removeSkippedScrap(); switch (mLayoutMode) { case LAYOUT_SET_SELECTION: if (newSel != null) { sel = fillFromSelection(newSel.getLeft(), childrenLeft, childrenRight); } else { sel = fillFromMiddle(childrenLeft, childrenRight); } break; case LAYOUT_SYNC: sel = fillSpecific(mSyncPosition, mSpecificLeft); break; case LAYOUT_FORCE_RIGHT: sel = fillLeft(mItemCount - 1, childrenRight); adjustViewsLeftOrRight(); break; case LAYOUT_FORCE_LEFT: mFirstPosition = 0; sel = fillFromLeft(childrenLeft); adjustViewsLeftOrRight(); break; case LAYOUT_SPECIFIC: sel = fillSpecific(reconcileSelectedPosition(), mSpecificLeft); break; case LAYOUT_MOVE_SELECTION: sel = moveSelection(oldSel, newSel, delta, childrenLeft, childrenRight); break; default: if (childCount == 0) { if (!mStackFromRight) { final int position = lookForSelectablePosition(0, true); setSelectedPositionInt(position); sel = fillFromLeft(childrenLeft); } else { final int position = lookForSelectablePosition(mItemCount - 1, false); setSelectedPositionInt(position); sel = fillLeft(mItemCount - 1, childrenRight); } } else { if (mSelectedPosition >= 0 && mSelectedPosition < mItemCount) { sel = fillSpecific(mSelectedPosition, oldSel == null ? childrenLeft : oldSel.getLeft()); } else if (mFirstPosition < mItemCount) { sel = fillSpecific(mFirstPosition, oldFirst == null ? childrenLeft : oldFirst.getLeft()); } else { sel = fillSpecific(0, childrenLeft); } } break; } // Flush any cached views that did not get reused above recycleBin.scrapActiveViews(); if (sel != null) { // the current selected item should get focus if items // are focusable if (mItemsCanFocus && hasFocus() && !sel.hasFocus()) { final boolean focusWasTaken = (sel == focusLayoutRestoreDirectChild && focusLayoutRestoreView != null && focusLayoutRestoreView.requestFocus()) || sel.requestFocus(); if (!focusWasTaken) { // selected item didn't take focus, fine, but still want // to make sure something else outside of the selected view // has focus final View focused = getFocusedChild(); if (focused != null) { focused.clearFocus(); } positionSelector(INVALID_POSITION, sel); } else { sel.setSelected(false); mSelectorRect.setEmpty(); } } else { positionSelector(INVALID_POSITION, sel); } mSelectedLeft = sel.getLeft(); } else { if (mTouchMode > TOUCH_MODE_DOWN && mTouchMode < TOUCH_MODE_SCROLL) { View child = getChildAt(mMotionPosition - mFirstPosition); if (child != null) positionSelector(mMotionPosition, child); } else { mSelectedLeft = 0; mSelectorRect.setEmpty(); } // even if there is not selected position, we may need to restore // focus (i.e. something focusable in touch mode) if (hasFocus() && focusLayoutRestoreView != null) { focusLayoutRestoreView.requestFocus(); } } // TODO We can use those accessability methods, we just remove those (j.m.) // // Attempt to restore accessibility focus. // if (accessibilityFocusLayoutRestoreNode != null) { // accessibilityFocusLayoutRestoreNode.performAction( // AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS); // } else if (accessibilityFocusLayoutRestoreView != null) { // accessibilityFocusLayoutRestoreView.requestAccessibilityFocus(); // } else if (accessibilityFocusPosition != INVALID_POSITION) { // // Bound the position within the visible children. // final int position = MathUtils.constrain( // (accessibilityFocusPosition - mFirstPosition), 0, (getChildCount() - 1)); // final View restoreView = getChildAt(position); // if (restoreView != null) { // restoreView.requestAccessibilityFocus(); // } // } // tell focus view we are done mucking with it, if it is still in // our view hierarchy. if (focusLayoutRestoreView != null && focusLayoutRestoreView.getWindowToken() != null) { focusLayoutRestoreView.onFinishTemporaryDetach(); } mLayoutMode = LAYOUT_NORMAL; mDataChanged = false; if (mPositionScrollAfterLayout != null) { post(mPositionScrollAfterLayout); mPositionScrollAfterLayout = null; } mNeedSync = false; setNextSelectedPositionInt(mSelectedPosition); updateScrollIndicators(); if (mItemCount > 0) { checkSelectionChanged(); } invokeOnItemScrollListener(); } finally { if (!blockLayoutRequests) { mBlockLayoutRequests = false; } } }
From source file:com.appunite.list.ListView.java
@Override protected void layoutChildren() { final boolean blockLayoutRequests = mBlockLayoutRequests; if (!blockLayoutRequests) { mBlockLayoutRequests = true;/*from www.j a v a 2 s .com*/ } else { return; } try { super.layoutChildren(); invalidate(); if (mAdapter == null) { resetList(); invokeOnItemScrollListener(); return; } int childrenTop = mListPadding.top; int childrenBottom = getBottom() - getTop() - mListPadding.bottom; int childCount = getChildCount(); int index = 0; int delta = 0; View sel; View oldSel = null; View oldFirst = null; View newSel = null; View focusLayoutRestoreView = null; AccessibilityNodeInfo accessibilityFocusLayoutRestoreNode = null; View accessibilityFocusLayoutRestoreView = null; int accessibilityFocusPosition = INVALID_POSITION; // Remember stuff we will need down below switch (mLayoutMode) { case LAYOUT_SET_SELECTION: index = mNextSelectedPosition - mFirstPosition; if (index >= 0 && index < childCount) { newSel = getChildAt(index); } break; case LAYOUT_FORCE_TOP: case LAYOUT_FORCE_BOTTOM: case LAYOUT_SPECIFIC: case LAYOUT_SYNC: break; case LAYOUT_MOVE_SELECTION: default: // Remember the previously selected view index = mSelectedPosition - mFirstPosition; if (index >= 0 && index < childCount) { oldSel = getChildAt(index); } // Remember the previous first child oldFirst = getChildAt(0); if (mNextSelectedPosition >= 0) { delta = mNextSelectedPosition - mSelectedPosition; } // Caution: newSel might be null newSel = getChildAt(index + delta); } boolean dataChanged = mDataChanged; if (dataChanged) { handleDataChanged(); } // Handle the empty set by removing all views that are visible // and calling it a day if (mItemCount == 0) { resetList(); invokeOnItemScrollListener(); return; } else if (mItemCount != mAdapter.getCount()) { throw new IllegalStateException("The content of the adapter has changed but " + "ListView did not receive a notification. Make sure the content of " + "your adapter is not modified from a background thread, but only " + "from the UI thread. [in ListView(" + getId() + ", " + getClass() + ") with Adapter(" + mAdapter.getClass() + ")]"); } setSelectedPositionInt(mNextSelectedPosition); // Pull all children into the RecycleBin. // These views will be reused if possible final int firstPosition = mFirstPosition; final RecycleBin recycleBin = mRecycler; // reset the focus restoration View focusLayoutRestoreDirectChild = null; // Don't put header or footer views into the Recycler. Those are // already cached in mHeaderViews; if (dataChanged) { for (int i = 0; i < childCount; i++) { recycleBin.addScrapView(getChildAt(i), firstPosition + i); } } else { recycleBin.fillActiveViews(childCount, firstPosition); } // take focus back to us temporarily to avoid the eventual // call to clear focus when removing the focused child below // from messing things up when ViewAncestor assigns focus back // to someone else final View focusedChild = getFocusedChild(); if (focusedChild != null) { // TODO: in some cases focusedChild.getParent() == null // we can remember the focused view to restore after relayout if the // data hasn't changed, or if the focused position is a header or footer if (!dataChanged || isDirectChildHeaderOrFooter(focusedChild)) { focusLayoutRestoreDirectChild = focusedChild; // remember the specific view that had focus focusLayoutRestoreView = findFocus(); if (focusLayoutRestoreView != null) { // tell it we are going to mess with it focusLayoutRestoreView.onStartTemporaryDetach(); } } requestFocus(); } // TODO We can use those accessability methods, we just remove those (j.m.) // //Remember which child, if any, had accessibility focus. // final ViewRootImpl viewRootImpl = getViewRootImpl(); // if (viewRootImpl != null) { // final View accessFocusedView = viewRootImpl.getAccessibilityFocusedHost(); // if (accessFocusedView != null) { // final View accessFocusedChild = findAccessibilityFocusedChild( // accessFocusedView); // if (accessFocusedChild != null) { // if (!dataChanged || isDirectChildHeaderOrFooter(accessFocusedChild)) { // // If the views won't be changing, try to maintain // // focus on the current view host and (if // // applicable) its virtual view. // accessibilityFocusLayoutRestoreView = accessFocusedView; // accessibilityFocusLayoutRestoreNode = viewRootImpl // .getAccessibilityFocusedVirtualView(); // } else { // // Otherwise, try to maintain focus at the same // // position. // accessibilityFocusPosition = getPositionForView(accessFocusedChild); // } // } // } // } // Clear out old views detachAllViewsFromParent(); recycleBin.removeSkippedScrap(); switch (mLayoutMode) { case LAYOUT_SET_SELECTION: if (newSel != null) { sel = fillFromSelection(newSel.getTop(), childrenTop, childrenBottom); } else { sel = fillFromMiddle(childrenTop, childrenBottom); } break; case LAYOUT_SYNC: sel = fillSpecific(mSyncPosition, mSpecificTop); break; case LAYOUT_FORCE_BOTTOM: sel = fillUp(mItemCount - 1, childrenBottom); adjustViewsUpOrDown(); break; case LAYOUT_FORCE_TOP: mFirstPosition = 0; sel = fillFromTop(childrenTop); adjustViewsUpOrDown(); break; case LAYOUT_SPECIFIC: sel = fillSpecific(reconcileSelectedPosition(), mSpecificTop); break; case LAYOUT_MOVE_SELECTION: sel = moveSelection(oldSel, newSel, delta, childrenTop, childrenBottom); break; default: if (childCount == 0) { if (!mStackFromBottom) { final int position = lookForSelectablePosition(0, true); setSelectedPositionInt(position); sel = fillFromTop(childrenTop); } else { final int position = lookForSelectablePosition(mItemCount - 1, false); setSelectedPositionInt(position); sel = fillUp(mItemCount - 1, childrenBottom); } } else { if (mSelectedPosition >= 0 && mSelectedPosition < mItemCount) { sel = fillSpecific(mSelectedPosition, oldSel == null ? childrenTop : oldSel.getTop()); } else if (mFirstPosition < mItemCount) { sel = fillSpecific(mFirstPosition, oldFirst == null ? childrenTop : oldFirst.getTop()); } else { sel = fillSpecific(0, childrenTop); } } break; } // Flush any cached views that did not get reused above recycleBin.scrapActiveViews(); if (sel != null) { // the current selected item should get focus if items // are focusable if (mItemsCanFocus && hasFocus() && !sel.hasFocus()) { final boolean focusWasTaken = (sel == focusLayoutRestoreDirectChild && focusLayoutRestoreView != null && focusLayoutRestoreView.requestFocus()) || sel.requestFocus(); if (!focusWasTaken) { // selected item didn't take focus, fine, but still want // to make sure something else outside of the selected view // has focus final View focused = getFocusedChild(); if (focused != null) { focused.clearFocus(); } positionSelector(INVALID_POSITION, sel); } else { sel.setSelected(false); mSelectorRect.setEmpty(); } } else { positionSelector(INVALID_POSITION, sel); } mSelectedTop = sel.getTop(); } else { if (mTouchMode > TOUCH_MODE_DOWN && mTouchMode < TOUCH_MODE_SCROLL) { View child = getChildAt(mMotionPosition - mFirstPosition); if (child != null) positionSelector(mMotionPosition, child); } else { mSelectedTop = 0; mSelectorRect.setEmpty(); } // even if there is not selected position, we may need to restore // focus (i.e. something focusable in touch mode) if (hasFocus() && focusLayoutRestoreView != null) { focusLayoutRestoreView.requestFocus(); } } // TODO We can use those accessability methods, we just remove those (j.m.) // // Attempt to restore accessibility focus. // if (accessibilityFocusLayoutRestoreNode != null) { // accessibilityFocusLayoutRestoreNode.performAction( // AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS); // } else if (accessibilityFocusLayoutRestoreView != null) { // accessibilityFocusLayoutRestoreView.requestAccessibilityFocus(); // } else if (accessibilityFocusPosition != INVALID_POSITION) { // // Bound the position within the visible children. // final int position = MathUtils.constrain( // (accessibilityFocusPosition - mFirstPosition), 0, (getChildCount() - 1)); // final View restoreView = getChildAt(position); // if (restoreView != null) { // restoreView.requestAccessibilityFocus(); // } // } // tell focus view we are done mucking with it, if it is still in // our view hierarchy. if (focusLayoutRestoreView != null && focusLayoutRestoreView.getWindowToken() != null) { focusLayoutRestoreView.onFinishTemporaryDetach(); } mLayoutMode = LAYOUT_NORMAL; mDataChanged = false; if (mPositionScrollAfterLayout != null) { post(mPositionScrollAfterLayout); mPositionScrollAfterLayout = null; } mNeedSync = false; setNextSelectedPositionInt(mSelectedPosition); updateScrollIndicators(); if (mItemCount > 0) { checkSelectionChanged(); } invokeOnItemScrollListener(); } finally { if (!blockLayoutRequests) { mBlockLayoutRequests = false; } } }