Android13-Launcer3_屏蔽列表页、屏幕APP图标长按事件

未屏蔽前

列表页

Launcher3/src/com/android/launcher3/allapps/AllAppsGridAdapter.java

AllAppsGridAdapter继承自BaseAllAppsAdapter

Launcher3/src/com/android/launcher3/allapps/BaseAllAppsAdapter.java

public abstract class BaseAllAppsAdapter<T extends Context & ActivityContext> extends
        RecyclerView.Adapter<BaseAllAppsAdapter.ViewHolder> {

在onCreateViewHolder方法构建APP Item

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        switch (viewType) {
            case VIEW_TYPE_ICON:
                int layout = !FeatureFlags.ENABLE_TWOLINE_ALLAPPS.get() ? R.layout.all_apps_icon
                        : R.layout.all_apps_icon_twoline;
                BubbleTextView icon = (BubbleTextView) mLayoutInflater.inflate(
                        layout, parent, false);
                icon.setLongPressTimeoutFactor(1f);
                icon.setOnFocusChangeListener(mIconFocusListener);
                icon.setOnClickListener(mOnIconClickListener);
                icon.setOnLongClickListener(mOnIconLongClickListener);
                // Ensure the all apps icon height matches the workspace icons in portrait mode.
                icon.getLayoutParams().height =
                        mActivityContext.getDeviceProfile().allAppsCellHeightPx;
                if (FeatureFlags.ENABLE_TWOLINE_ALLAPPS.get()) {
                    icon.getLayoutParams().height += mExtraHeight;
                }
                return new ViewHolder(icon);
            case VIEW_TYPE_EMPTY_SEARCH:
                return new ViewHolder(mLayoutInflater.inflate(R.layout.all_apps_empty_search,
                        parent, false));
            case VIEW_TYPE_ALL_APPS_DIVIDER:
                return new ViewHolder(mLayoutInflater.inflate(
                        R.layout.all_apps_divider, parent, false));
            case VIEW_TYPE_WORK_EDU_CARD:
                return new ViewHolder(mLayoutInflater.inflate(
                        R.layout.work_apps_edu, parent, false));
            case VIEW_TYPE_WORK_DISABLED_CARD:
                return new ViewHolder(mLayoutInflater.inflate(
                        R.layout.work_apps_paused, parent, false));
            default:
                BaseAdapterProvider adapterProvider = getAdapterProvider(viewType);
                if (adapterProvider != null) {
                    return adapterProvider.onCreateViewHolder(mLayoutInflater, parent, viewType);
                }
                throw new RuntimeException("Unexpected view type" + viewType);
        }
    }

在VIEW_TYPE_ICON类型中，创建ViewHolder的时候设置了长按监听事件，这里注释掉可以取消长按事件，但也关闭长按从列表页拖拽到屏幕上添加快捷方式的效果

未屏蔽前

屏蔽屏幕APP长按事件

WorkspaceLayoutManager

Launcher3/src/com/android/launcher3/WorkspaceLayoutManager.java

在addInScreen()方法

    default void addInScreen(View child, int container, int screenId, int x, int y,
            int spanX, int spanY) {
        if (container == LauncherSettings.Favorites.CONTAINER_DESKTOP) {
            if (getScreenWithId(screenId) == null) {
                Log.e(TAG, "Skipping child, screenId " + screenId + " not found");
                // DEBUGGING - Print out the stack trace to see where we are adding from
                new Throwable().printStackTrace();
                return;
            }
        }
        if (EXTRA_EMPTY_SCREEN_IDS.contains(screenId)) {
            // This should never happen
            throw new RuntimeException("Screen id should not be extra empty screen: " + screenId);
        }

        final CellLayout layout;
        if (container == LauncherSettings.Favorites.CONTAINER_HOTSEAT
                || container == LauncherSettings.Favorites.CONTAINER_HOTSEAT_PREDICTION) {
            layout = getHotseat();

            // Hide folder title in the hotseat
            if (child instanceof FolderIcon) {
                ((FolderIcon) child).setTextVisible(false);
            }
        } else {
            // Show folder title if not in the hotseat
            if (child instanceof FolderIcon) {
                ((FolderIcon) child).setTextVisible(true);
            }
            layout = getScreenWithId(screenId);
        }

        ViewGroup.LayoutParams genericLp = child.getLayoutParams();
        CellLayoutLayoutParams lp;
        if (genericLp == null || !(genericLp instanceof CellLayoutLayoutParams)) {
            lp = new CellLayoutLayoutParams(x, y, spanX, spanY, screenId);
        } else {
            lp = (CellLayoutLayoutParams) genericLp;
            lp.cellX = x;
            lp.cellY = y;
            lp.cellHSpan = spanX;
            lp.cellVSpan = spanY;
        }

        if (spanX < 0 && spanY < 0) {
            lp.isLockedToGrid = false;
        }

        // Get the canonical child id to uniquely represent this view in this screen
        ItemInfo info = (ItemInfo) child.getTag();
        int childId = info.getViewId();

        boolean markCellsAsOccupied = !(child instanceof Folder);
        if (!layout.addViewToCellLayout(child, -1, childId, lp, markCellsAsOccupied)) {
            // TODO: This branch occurs when the workspace is adding views
            // outside of the defined grid
            // maybe we should be deleting these items from the LauncherModel?
            Log.e(TAG, "Failed to add to item at (" + lp.cellX + "," + lp.cellY + ") to CellLayout");
        }

        child.setHapticFeedbackEnabled(false);
//        屏蔽屏幕APP长按事件
//        child.setOnLongClickListener(getWorkspaceChildOnLongClickListener());
        if (child instanceof DropTarget) {
            onAddDropTarget((DropTarget) child);
        }
    }

也会失去APP拖拽移动效果