Android13-Launcer3_长按图标去掉应用信息

未处理前

应用信息查找

    <string name="app_info_drop_target_label">App info</string>

AppInfo是SystemShortcut的内部静态类

    public static class AppInfo<T extends Context & ActivityContext> extends SystemShortcut<T> {

        @Nullable
        private SplitAccessibilityInfo mSplitA11yInfo;

        public AppInfo(T target, ItemInfo itemInfo, View originalView) {
            super(R.drawable.ic_info_no_shadow, R.string.app_info_drop_target_label, target,
                    itemInfo, originalView);
        }

SystemShortcut

public abstract class SystemShortcut<T extends Context & ActivityContext> extends ItemInfo
        implements View.OnClickListener {

长按事件分析

WorkspaceLayoutManager

    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);
        //这里添加长按事件
        child.setOnLongClickListener(getWorkspaceChildOnLongClickListener());
        if (child instanceof DropTarget) {
            onAddDropTarget((DropTarget) child);
        }
    }
    
    default View.OnLongClickListener getWorkspaceChildOnLongClickListener() {
        return ItemLongClickListener.INSTANCE_WORKSPACE;
    }

    
   public static final OnLongClickListener INSTANCE_WORKSPACE =
		   ItemLongClickListener::onWorkspaceItemLongClick;
    
    private static boolean onWorkspaceItemLongClick(View v) {
        if (v instanceof LauncherAppWidgetHostView) {
            TestLogging.recordEvent(TestProtocol.SEQUENCE_MAIN, "Widgets.onLongClick");
        } else {
            TestLogging.recordEvent(TestProtocol.SEQUENCE_MAIN, "onWorkspaceItemLongClick");
        }
        Launcher launcher = Launcher.getLauncher(v.getContext());
        if (!canStartDrag(launcher)) return false;
        if (!launcher.isInState(NORMAL) && !launcher.isInState(OVERVIEW)) return false;
        if (!(v.getTag() instanceof ItemInfo)) return false;

        launcher.setWaitingForResult(null);
        beginDrag(v, launcher, (ItemInfo) v.getTag(), launcher.getDefaultWorkspaceDragOptions());
        return true;
    }

长按事件从beginDrag()方法开始调用，调用到BubbleTextView的startLongPressAction()，接着调用PopupContainerWithArrow的showForIcon()方法

showForIcon()方法负责弹窗的构建，加载弹窗Item信息

    public static PopupContainerWithArrow<Launcher> showForIcon(BubbleTextView icon) {
        Launcher launcher = Launcher.getLauncher(icon.getContext());
        if (getOpen(launcher) != null) {
            // There is already an items container open, so don't open this one.
            icon.clearFocus();
            return null;
        }
        ItemInfo item = (ItemInfo) icon.getTag();
        if (!ShortcutUtil.supportsShortcuts(item)) {
            return null;
        }

        final PopupContainerWithArrow<Launcher> container =
                (PopupContainerWithArrow) launcher.getLayoutInflater().inflate(
                        R.layout.popup_container, launcher.getDragLayer(), false);
        container.configureForLauncher(launcher);

        PopupDataProvider popupDataProvider = launcher.getPopupDataProvider();
        container.populateAndShow(icon,
                popupDataProvider.getShortcutCountForItem(item),
                popupDataProvider.getNotificationKeysForItem(item),
	              //这里获取appInfo、widgetItem信息
                launcher.getSupportedShortcuts()
                        .map(s -> s.getShortcut(launcher, item, icon))
                        .filter(Objects::nonNull)
                        .collect(Collectors.toList()));
        launcher.refreshAndBindWidgetsForPackageUser(PackageUserKey.fromItemInfo(item));
        container.requestFocus();
        return container;
    }

Launcher

    public Stream<SystemShortcut.Factory> getSupportedShortcuts() {
//        return Stream.of(APP_INFO, WIDGETS, INSTALL);
        return Stream.of(WIDGETS, INSTALL);
    }

效果