Example usage for android.view ViewGroup getChildAt

Introduction

In this page you can find the example usage for android.view ViewGroup getChildAt.

Prototype

public View getChildAt(int index) 

Source Link

Document

Returns the view at the specified position in the group.

Usage

From source file:dev.dworks.libs.widget.ViewPager.java

/**
 * Tests scrollability within child views of v given a delta of dx.
 *
 * @param v View to test for horizontal scrollability
 * @param checkV Whether the view v passed should itself be checked for scrollability (true),
 *               or just its children (false).
 * @param d Delta scrolled in pixels/* w w w . j a  va 2 s . co m*/
 * @param x X coordinate of the active touch point
 * @param y Y coordinate of the active touch point
 * @return true if child views of v can be scrolled by delta of dx.
 */
protected boolean canScroll(View v, boolean checkV, int d, int x, int y) {
    if (v instanceof ViewGroup) {
        final ViewGroup group = (ViewGroup) v;
        final int scrollX = v.getScrollX();
        final int scrollY = v.getScrollY();
        final int count = group.getChildCount();
        // Count backwards - let topmost views consume scroll distance first.
        for (int i = count - 1; i >= 0; i--) {
            // TODO: Add versioned support here for transformed views.
            // This will not work for transformed views in Honeycomb+
            final View child = group.getChildAt(i);
            if (x + scrollX >= child.getLeft() && x + scrollX < child.getRight()
                    && y + scrollY >= child.getTop() && y + scrollY < child.getBottom()
                    && canScroll(child, true, d, x + scrollX - child.getLeft(), y + scrollY - child.getTop())) {
                return true;
            }
        }
    }

    boolean canScroll;
    if (mOrientation == HORIZONTAL) {
        canScroll = checkV && ViewCompat.canScrollHorizontally(v, -d);
    } else {
        canScroll = checkV && ViewCompat.canScrollVertically(v, -d);
    }
    return canScroll;
}

---

From source file:com.android.launcher2.Workspace.java

void removeItems(final ArrayList<String> packages) {
    final HashSet<String> packageNames = new HashSet<String>();
    packageNames.addAll(packages);/*from  w  ww  . jav a2  s. c  o  m*/

    ArrayList<CellLayout> cellLayouts = getWorkspaceAndHotseatCellLayouts();
    for (final CellLayout layoutParent : cellLayouts) {
        final ViewGroup layout = layoutParent.getShortcutsAndWidgets();

        // Avoid ANRs by treating each screen separately
        post(new Runnable() {
            public void run() {
                final ArrayList<View> childrenToRemove = new ArrayList<View>();
                childrenToRemove.clear();

                int childCount = layout.getChildCount();
                for (int j = 0; j < childCount; j++) {
                    final View view = layout.getChildAt(j);
                    Object tag = view.getTag();

                    if (tag instanceof ShortcutInfo) {
                        final ShortcutInfo info = (ShortcutInfo) tag;
                        final Intent intent = info.intent;
                        final ComponentName name = intent.getComponent();

                        if (name != null) {
                            if (packageNames.contains(name.getPackageName())) {
                                LauncherModel.deleteItemFromDatabase(mLauncher, info);
                                childrenToRemove.add(view);
                            }
                        }
                    } else if (tag instanceof FolderInfo) {
                        final FolderInfo info = (FolderInfo) tag;
                        final ArrayList<ShortcutInfo> contents = info.contents;
                        final int contentsCount = contents.size();
                        final ArrayList<ShortcutInfo> appsToRemoveFromFolder = new ArrayList<ShortcutInfo>();

                        for (int k = 0; k < contentsCount; k++) {
                            final ShortcutInfo appInfo = contents.get(k);
                            final Intent intent = appInfo.intent;
                            final ComponentName name = intent.getComponent();

                            if (name != null) {
                                if (packageNames.contains(name.getPackageName())) {
                                    appsToRemoveFromFolder.add(appInfo);
                                }
                            }
                        }
                        for (ShortcutInfo item : appsToRemoveFromFolder) {
                            info.remove(item);
                            LauncherModel.deleteItemFromDatabase(mLauncher, item);
                        }
                    } else if (tag instanceof LauncherAppWidgetInfo) {
                        final LauncherAppWidgetInfo info = (LauncherAppWidgetInfo) tag;
                        final ComponentName provider = info.providerName;
                        if (provider != null) {
                            if (packageNames.contains(provider.getPackageName())) {
                                LauncherModel.deleteItemFromDatabase(mLauncher, info);
                                childrenToRemove.add(view);
                            }
                        }
                    }
                }

                childCount = childrenToRemove.size();
                for (int j = 0; j < childCount; j++) {
                    View child = childrenToRemove.get(j);
                    // Note: We can not remove the view directly from CellLayoutChildren as this
                    // does not re-mark the spaces as unoccupied.
                    layoutParent.removeViewInLayout(child);
                    if (child instanceof DropTarget) {
                        mDragController.removeDropTarget((DropTarget) child);
                    }
                }

                if (childCount > 0) {
                    layout.requestLayout();
                    layout.invalidate();
                }
            }
        });
    }

    // Clean up new-apps animation list
    final Context context = getContext();
    post(new Runnable() {
        @Override
        public void run() {
            String spKey = LauncherApplication.getSharedPreferencesKey();
            SharedPreferences sp = context.getSharedPreferences(spKey, Context.MODE_PRIVATE);
            Set<String> newApps = sp.getStringSet(InstallShortcutReceiver.NEW_APPS_LIST_KEY, null);

            // Remove all queued items that match the same package
            if (newApps != null) {
                synchronized (newApps) {
                    Iterator<String> iter = newApps.iterator();
                    while (iter.hasNext()) {
                        try {
                            Intent intent = Intent.parseUri(iter.next(), 0);
                            String pn = ItemInfo.getPackageName(intent);
                            if (packageNames.contains(pn)) {
                                iter.remove();
                            }

                            // It is possible that we've queued an item to be loaded, yet it has
                            // not been added to the workspace, so remove those items as well.
                            ArrayList<ItemInfo> shortcuts;
                            shortcuts = LauncherModel.getWorkspaceShortcutItemInfosWithIntent(intent);
                            for (ItemInfo info : shortcuts) {
                                LauncherModel.deleteItemFromDatabase(context, info);
                            }
                        } catch (URISyntaxException e) {
                        }
                    }
                }
            }
        }
    });
}

---

From source file:cc.flydev.launcher.Workspace.java

void removeItemsByPackageName(final ArrayList<String> packages) {
    final HashSet<String> packageNames = new HashSet<String>();
    packageNames.addAll(packages);//  w w w  .  j  a  v  a 2 s  . c  o  m

    // Filter out all the ItemInfos that this is going to affect
    final HashSet<ItemInfo> infos = new HashSet<ItemInfo>();
    final HashSet<ComponentName> cns = new HashSet<ComponentName>();
    ArrayList<CellLayout> cellLayouts = getWorkspaceAndHotseatCellLayouts();
    for (CellLayout layoutParent : cellLayouts) {
        ViewGroup layout = layoutParent.getShortcutsAndWidgets();
        int childCount = layout.getChildCount();
        for (int i = 0; i < childCount; ++i) {
            View view = layout.getChildAt(i);
            infos.add((ItemInfo) view.getTag());
        }
    }
    LauncherModel.ItemInfoFilter filter = new LauncherModel.ItemInfoFilter() {
        @Override
        public boolean filterItem(ItemInfo parent, ItemInfo info, ComponentName cn) {
            if (packageNames.contains(cn.getPackageName())) {
                cns.add(cn);
                return true;
            }
            return false;
        }
    };
    LauncherModel.filterItemInfos(infos, filter);

    // Remove the affected components
    removeItemsByComponentName(cns);
}

---

From source file:cc.flydev.launcher.Workspace.java

void removeItemsByComponentName(final HashSet<ComponentName> componentNames) {
    ArrayList<CellLayout> cellLayouts = getWorkspaceAndHotseatCellLayouts();
    for (final CellLayout layoutParent : cellLayouts) {
        final ViewGroup layout = layoutParent.getShortcutsAndWidgets();

        final HashMap<ItemInfo, View> children = new HashMap<ItemInfo, View>();
        for (int j = 0; j < layout.getChildCount(); j++) {
            final View view = layout.getChildAt(j);
            children.put((ItemInfo) view.getTag(), view);
        }//w  w w. j  a va 2s .c  om

        final ArrayList<View> childrenToRemove = new ArrayList<View>();
        final HashMap<FolderInfo, ArrayList<ShortcutInfo>> folderAppsToRemove = new HashMap<FolderInfo, ArrayList<ShortcutInfo>>();
        LauncherModel.ItemInfoFilter filter = new LauncherModel.ItemInfoFilter() {
            @Override
            public boolean filterItem(ItemInfo parent, ItemInfo info, ComponentName cn) {
                if (parent instanceof FolderInfo) {
                    if (componentNames.contains(cn)) {
                        FolderInfo folder = (FolderInfo) parent;
                        ArrayList<ShortcutInfo> appsToRemove;
                        if (folderAppsToRemove.containsKey(folder)) {
                            appsToRemove = folderAppsToRemove.get(folder);
                        } else {
                            appsToRemove = new ArrayList<ShortcutInfo>();
                            folderAppsToRemove.put(folder, appsToRemove);
                        }
                        appsToRemove.add((ShortcutInfo) info);
                        return true;
                    }
                } else {
                    if (componentNames.contains(cn)) {
                        childrenToRemove.add(children.get(info));
                        return true;
                    }
                }
                return false;
            }
        };
        LauncherModel.filterItemInfos(children.keySet(), filter);

        // Remove all the apps from their folders
        for (FolderInfo folder : folderAppsToRemove.keySet()) {
            ArrayList<ShortcutInfo> appsToRemove = folderAppsToRemove.get(folder);
            for (ShortcutInfo info : appsToRemove) {
                folder.remove(info);
            }
        }

        // Remove all the other children
        for (View child : childrenToRemove) {
            // Note: We can not remove the view directly from CellLayoutChildren as this
            // does not re-mark the spaces as unoccupied.
            layoutParent.removeViewInLayout(child);
            if (child instanceof DropTarget) {
                mDragController.removeDropTarget((DropTarget) child);
            }
        }

        if (childrenToRemove.size() > 0) {
            layout.requestLayout();
            layout.invalidate();
        }
    }

    // Strip all the empty screens
    stripEmptyScreens();
}

---

From source file:com.aidy.launcher3.ui.workspace.Workspace.java

public void removeItemsByPackageName(final ArrayList<String> packages) {
    final HashSet<String> packageNames = new HashSet<String>();
    packageNames.addAll(packages);//from   w  w w  . jav  a2s.c o m

    // Filter out all the ItemInfos that this is going to affect
    final HashSet<ItemInfoBean> infos = new HashSet<ItemInfoBean>();
    final HashSet<ComponentName> cns = new HashSet<ComponentName>();
    ArrayList<CellLayout> cellLayouts = getWorkspaceAndHotseatCellLayouts();
    for (CellLayout layoutParent : cellLayouts) {
        ViewGroup layout = layoutParent.getShortcutsAndWidgets();
        int childCount = layout.getChildCount();
        for (int i = 0; i < childCount; ++i) {
            View view = layout.getChildAt(i);
            infos.add((ItemInfoBean) view.getTag());
        }
    }
    LauncherModel.ItemInfoFilter filter = new LauncherModel.ItemInfoFilter() {
        @Override
        public boolean filterItem(ItemInfoBean parent, ItemInfoBean info, ComponentName cn) {
            if (packageNames.contains(cn.getPackageName())) {
                cns.add(cn);
                return true;
            }
            return false;
        }
    };
    LauncherModel.filterItemInfos(infos, filter);

    // Remove the affected components
    removeItemsByComponentName(cns);
}

---

From source file:com.example.launcher3.Workspace.java

void removeItemsByComponentName(final HashSet<ComponentName> componentNames) {
    ArrayList<CellLayout> cellLayouts = getWorkspaceAndHotseatCellLayouts();
    for (final CellLayout layoutParent : cellLayouts) {
        final ViewGroup layout = layoutParent.getShortcutsAndWidgets();

        final HashMap<ItemInfo, View> children = new HashMap<ItemInfo, View>();
        for (int j = 0; j < layout.getChildCount(); j++) {
            final View view = layout.getChildAt(j);
            children.put((ItemInfo) view.getTag(), view);
        }/*from  w w w .  j ava  2s .  c  o  m*/

        final ArrayList<View> childrenToRemove = new ArrayList<View>();
        final HashMap<FolderInfo, ArrayList<ShortcutInfo>> folderAppsToRemove = new HashMap<FolderInfo, ArrayList<ShortcutInfo>>();
        LauncherModel.ItemInfoFilter filter = new LauncherModel.ItemInfoFilter() {
            @Override
            public boolean filterItem(ItemInfo parent, ItemInfo info, ComponentName cn) {
                if (parent instanceof FolderInfo) {
                    if (componentNames.contains(cn)) {
                        FolderInfo folder = (FolderInfo) parent;
                        ArrayList<ShortcutInfo> appsToRemove;
                        if (folderAppsToRemove.containsKey(folder)) {
                            appsToRemove = folderAppsToRemove.get(folder);
                        } else {
                            appsToRemove = new ArrayList<ShortcutInfo>();
                            folderAppsToRemove.put(folder, appsToRemove);
                        }
                        appsToRemove.add((ShortcutInfo) info);
                        return true;
                    }
                } else {
                    if (componentNames.contains(cn)) {
                        childrenToRemove.add(children.get(info));
                        return true;
                    }
                }
                return false;
            }
        };
        LauncherModel.filterItemInfos(children.keySet(), filter);

        // Remove all the apps from their folders
        for (FolderInfo folder : folderAppsToRemove.keySet()) {
            ArrayList<ShortcutInfo> appsToRemove = folderAppsToRemove.get(folder);
            for (ShortcutInfo info : appsToRemove) {
                folder.remove(info);
            }
        }

        // Remove all the other children
        for (View child : childrenToRemove) {
            // Note: We can not remove the view directly from
            // CellLayoutChildren as this
            // does not re-mark the spaces as unoccupied.
            layoutParent.removeViewInLayout(child);
            if (child instanceof DropTarget) {
                mDragController.removeDropTarget((DropTarget) child);
            }
        }

        if (childrenToRemove.size() > 0) {
            layout.requestLayout();
            layout.invalidate();
        }
    }

    // Strip all the empty screens
    stripEmptyScreens();
}

---

From source file:com.aidy.launcher3.ui.workspace.Workspace.java

public void removeItemsByComponentName(final HashSet<ComponentName> componentNames) {
    ArrayList<CellLayout> cellLayouts = getWorkspaceAndHotseatCellLayouts();
    for (final CellLayout layoutParent : cellLayouts) {
        final ViewGroup layout = layoutParent.getShortcutsAndWidgets();

        final HashMap<ItemInfoBean, View> children = new HashMap<ItemInfoBean, View>();
        for (int j = 0; j < layout.getChildCount(); j++) {
            final View view = layout.getChildAt(j);
            children.put((ItemInfoBean) view.getTag(), view);
        }/*from  www .j  a  v a 2 s  .  c  o m*/

        final ArrayList<View> childrenToRemove = new ArrayList<View>();
        final HashMap<FolderInfoBean, ArrayList<ShortcutInfo>> folderAppsToRemove = new HashMap<FolderInfoBean, ArrayList<ShortcutInfo>>();
        LauncherModel.ItemInfoFilter filter = new LauncherModel.ItemInfoFilter() {
            @Override
            public boolean filterItem(ItemInfoBean parent, ItemInfoBean info, ComponentName cn) {
                if (parent instanceof FolderInfoBean) {
                    if (componentNames.contains(cn)) {
                        FolderInfoBean folder = (FolderInfoBean) parent;
                        ArrayList<ShortcutInfo> appsToRemove;
                        if (folderAppsToRemove.containsKey(folder)) {
                            appsToRemove = folderAppsToRemove.get(folder);
                        } else {
                            appsToRemove = new ArrayList<ShortcutInfo>();
                            folderAppsToRemove.put(folder, appsToRemove);
                        }
                        appsToRemove.add((ShortcutInfo) info);
                        return true;
                    }
                } else {
                    if (componentNames.contains(cn)) {
                        childrenToRemove.add(children.get(info));
                        return true;
                    }
                }
                return false;
            }
        };
        LauncherModel.filterItemInfos(children.keySet(), filter);

        // Remove all the apps from their folders
        for (FolderInfoBean folder : folderAppsToRemove.keySet()) {
            ArrayList<ShortcutInfo> appsToRemove = folderAppsToRemove.get(folder);
            for (ShortcutInfo info : appsToRemove) {
                folder.remove(info);
            }
        }

        // Remove all the other children
        for (View child : childrenToRemove) {
            // Note: We can not remove the view directly from
            // CellLayoutChildren as this
            // does not re-mark the spaces as unoccupied.
            layoutParent.removeViewInLayout(child);
            if (child instanceof DropTarget) {
                mDragController.removeDropTarget((DropTarget) child);
            }
        }

        if (childrenToRemove.size() > 0) {
            layout.requestLayout();
            layout.invalidate();
        }
    }

    // Strip all the empty screens
    stripEmptyScreens();
}

---

From source file:com.android.launcher3.Launcher.java

@Override
public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) {
    super.dump(prefix, fd, writer, args);
    // Dump workspace
    writer.println(prefix + "Workspace Items");
    for (int i = mWorkspace.numCustomPages(); i < mWorkspace.getPageCount(); i++) {
        writer.println(prefix + "  Homescreen " + i);

        ViewGroup layout = ((CellLayout) mWorkspace.getPageAt(i)).getShortcutsAndWidgets();
        for (int j = 0; j < layout.getChildCount(); j++) {
            Object tag = layout.getChildAt(j).getTag();
            if (tag != null) {
                writer.println(prefix + "    " + tag.toString());
            }/*w  w  w .  ja  v a  2  s  .  c  o  m*/
        }
    }

    writer.println(prefix + "  Hotseat");
    ViewGroup layout = mHotseat.getLayout().getShortcutsAndWidgets();
    for (int j = 0; j < layout.getChildCount(); j++) {
        Object tag = layout.getChildAt(j).getTag();
        if (tag != null) {
            writer.println(prefix + "    " + tag.toString());
        }
    }

    try {
        FileLog.flushAll(writer);
    } catch (Exception e) {
        // Ignore
    }

    if (mLauncherCallbacks != null) {
        mLauncherCallbacks.dump(prefix, fd, writer, args);
    }
}

---

From source file:com.fairphone.fplauncher3.Workspace.java

void removeItemsByComponentName(final HashSet<ComponentName> componentNames, final UserHandleCompat user) {
    ArrayList<CellLayout> cellLayouts = getWorkspaceAndHotseatCellLayouts();
    for (final CellLayout layoutParent : cellLayouts) {
        final ViewGroup layout = layoutParent.getShortcutsAndWidgets();

        final HashMap<ItemInfo, View> children = new HashMap<ItemInfo, View>();
        for (int j = 0; j < layout.getChildCount(); j++) {
            final View view = layout.getChildAt(j);
            children.put((ItemInfo) view.getTag(), view);
        }//from   www . j  ava 2  s.com

        final ArrayList<View> childrenToRemove = new ArrayList<View>();
        final HashMap<FolderInfo, ArrayList<ShortcutInfo>> folderAppsToRemove = new HashMap<FolderInfo, ArrayList<ShortcutInfo>>();
        LauncherModel.ItemInfoFilter filter = new LauncherModel.ItemInfoFilter() {
            @Override
            public boolean filterItem(ItemInfo parent, ItemInfo info, ComponentName cn) {
                if (parent instanceof FolderInfo) {
                    if (componentNames.contains(cn) && info.user.equals(user)) {
                        FolderInfo folder = (FolderInfo) parent;
                        ArrayList<ShortcutInfo> appsToRemove;
                        if (folderAppsToRemove.containsKey(folder)) {
                            appsToRemove = folderAppsToRemove.get(folder);
                        } else {
                            appsToRemove = new ArrayList<ShortcutInfo>();
                            folderAppsToRemove.put(folder, appsToRemove);
                        }
                        appsToRemove.add((ShortcutInfo) info);
                        return true;
                    }
                } else {
                    if (componentNames.contains(cn) && info.user.equals(user)) {
                        childrenToRemove.add(children.get(info));
                        return true;
                    }
                }
                return false;
            }
        };
        LauncherModel.filterItemInfos(children.keySet(), filter);

        // Remove all the apps from their folders
        for (FolderInfo folder : folderAppsToRemove.keySet()) {
            ArrayList<ShortcutInfo> appsToRemove = folderAppsToRemove.get(folder);
            for (ShortcutInfo info : appsToRemove) {
                folder.remove(info);
            }
        }

        // Remove all the other children
        for (View child : childrenToRemove) {
            // Note: We can not remove the view directly from CellLayoutChildren as this
            // does not re-mark the spaces as unoccupied.
            layoutParent.removeViewInLayout(child);
            if (child instanceof DropTarget) {
                mDragController.removeDropTarget((DropTarget) child);
            }
        }

        if (!childrenToRemove.isEmpty()) {
            layout.requestLayout();
            layout.invalidate();
        }
    }

    // Strip all the empty screens
    stripEmptyScreens();
}

---

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