Android13-Launcer3_Hotseat-禁止创建文件夹

Workspace

createUserFolderIfNecessary()方法负责创建文件夹，这里判断是Hotseat类型直接返回，不创建

    boolean createUserFolderIfNecessary(View newView, int container, CellLayout target,
            int[] targetCell, float distance, boolean external, DragObject d) {
        if (distance > target.getFolderCreationRadius(targetCell)) return false;
        View v = target.getChildAt(targetCell[0], targetCell[1]);

        //如果是Hotseat类型不创建Folder
        if(container == LauncherSettings.Favorites.CONTAINER_HOTSEAT){
            return false;
        }

        boolean hasntMoved = false;
        if (mDragInfo != null) {
            CellLayout cellParent = getParentCellLayoutForView(mDragInfo.cell);
            hasntMoved = (mDragInfo.cellX == targetCell[0] &&
                    mDragInfo.cellY == targetCell[1]) && (cellParent == target);
        }

        if (v == null || hasntMoved || !mCreateUserFolderOnDrop) return false;
        mCreateUserFolderOnDrop = false;
        final int screenId = getIdForScreen(target);

        boolean aboveShortcut = (v.getTag() instanceof WorkspaceItemInfo);
        boolean willBecomeShortcut = (newView.getTag() instanceof WorkspaceItemInfo);

        if (aboveShortcut && willBecomeShortcut) {
            WorkspaceItemInfo sourceInfo = (WorkspaceItemInfo) newView.getTag();
            WorkspaceItemInfo destInfo = (WorkspaceItemInfo) v.getTag();
            // if the drag started here, we need to remove it from the workspace
            if (!external) {
                getParentCellLayoutForView(mDragInfo.cell).removeView(mDragInfo.cell);
            }

            Rect folderLocation = new Rect();
            float scale = mLauncher.getDragLayer().getDescendantRectRelativeToSelf(v, folderLocation);
            target.removeView(v);
            mStatsLogManager.logger().withItemInfo(destInfo).withInstanceId(d.logInstanceId)
                    .log(LauncherEvent.LAUNCHER_ITEM_DROP_FOLDER_CREATED);
            FolderIcon fi = mLauncher.addFolder(target, container, screenId, targetCell[0],
                    targetCell[1]);
            destInfo.cellX = -1;
            destInfo.cellY = -1;
            sourceInfo.cellX = -1;
            sourceInfo.cellY = -1;

            // If the dragView is null, we can't animate
            boolean animate = d != null;
            if (animate) {
                // In order to keep everything continuous, we hand off the currently rendered
                // folder background to the newly created icon. This preserves animation state.
                fi.setFolderBackground(mFolderCreateBg);
                mFolderCreateBg = new PreviewBackground();
                fi.performCreateAnimation(destInfo, v, sourceInfo, d, folderLocation, scale);
            } else {
                fi.prepareCreateAnimation(v);
                fi.addItem(destInfo);
                fi.addItem(sourceInfo);
            }
            return true;
        }
        return false;
    }

移动到Hotseat上的应用图标时，还会出现文件夹的背景，在manageFolderFeedback()处理下

    private void manageFolderFeedback(float distance, DragObject dragObject) {
        if (distance > mDragTargetLayout.getFolderCreationRadius(mTargetCell)) {
            if ((mDragMode == DRAG_MODE_ADD_TO_FOLDER
                    || mDragMode == DRAG_MODE_CREATE_FOLDER)) {
                setDragMode(DRAG_MODE_NONE);
            }
            return;
        }

        final View dragOverView = mDragTargetLayout.getChildAt(mTargetCell[0], mTargetCell[1]);
        ItemInfo info = dragObject.dragInfo;
        boolean userFolderPending = willCreateUserFolder(info, dragOverView, false);

        //目标对象是否是Hotseat,如果是不进行文件夹背景的创建
        boolean isHotseatLayout = mLauncher.isHotseatLayout(mDragOverlappingLayout);
        //多添加hotseat的判断
        if (mDragMode == DRAG_MODE_NONE && userFolderPending && !isHotseatLayout) {
//        if (mDragMode == DRAG_MODE_NONE && userFolderPending) {

            mFolderCreateBg = new PreviewBackground();
            mFolderCreateBg.setup(mLauncher, mLauncher, null,
                    dragOverView.getMeasuredWidth(), dragOverView.getPaddingTop());

            // The full preview background should appear behind the icon
            mFolderCreateBg.isClipping = false;

            mFolderCreateBg.animateToAccept(mDragTargetLayout, mTargetCell[0], mTargetCell[1]);
            mDragTargetLayout.clearDragOutlines();
            setDragMode(DRAG_MODE_CREATE_FOLDER);

            if (dragObject.stateAnnouncer != null) {
                dragObject.stateAnnouncer.announce(WorkspaceAccessibilityHelper
                        .getDescriptionForDropOver(dragOverView, getContext()));
            }
            return;
        }

        boolean willAddToFolder = willAddToExistingUserFolder(info, dragOverView);
        if (willAddToFolder && mDragMode == DRAG_MODE_NONE) {
            mDragOverFolderIcon = ((FolderIcon) dragOverView);
            mDragOverFolderIcon.onDragEnter(info);
            if (mDragTargetLayout != null) {
                mDragTargetLayout.clearDragOutlines();
            }
            setDragMode(DRAG_MODE_ADD_TO_FOLDER);

            if (dragObject.stateAnnouncer != null) {
                dragObject.stateAnnouncer.announce(WorkspaceAccessibilityHelper
                        .getDescriptionForDropOver(dragOverView, getContext()));
            }
            return;
        }

        if (mDragMode == DRAG_MODE_ADD_TO_FOLDER && !willAddToFolder) {
            setDragMode(DRAG_MODE_NONE);
        }
        if (mDragMode == DRAG_MODE_CREATE_FOLDER && !userFolderPending) {
            setDragMode(DRAG_MODE_NONE);
        }
    }

manageFolderFeedback()方法会被onDragOver()方法调用到

效果