Example usage for android.view ViewGroup getChildCount

Introduction

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

Prototype

public int getChildCount() 

Source Link

Document

Returns the number of children in the group.

Usage

From source file:com.juick.android.JuickMessagesAdapter.java

public void recycleView(View view) {
    if (view instanceof ViewGroup) {
        ListRowRuntime lrr = (ListRowRuntime) view.getTag();
        if (lrr != null) {
            if (lrr.userpicListener != null) {
                lrr.removeListenerIfExists();
            }//from w  w w .  j a  v a2  s. c  om
        }
        ViewGroup vg = (ViewGroup) view;
        if (vg.getChildCount() > 1 && vg.getChildAt(1) instanceof ImageGallery
                && vg instanceof PressableLinearLayout) {
            PressableLinearLayout pll = (PressableLinearLayout) vg;
            // our view
            ImageGallery gallery = (ImageGallery) vg.getChildAt(1);
            Object tag = gallery.getTag();
            if (tag instanceof HashMap) {
                HashMap<Integer, ImageLoaderConfiguration> loaders = (HashMap<Integer, ImageLoaderConfiguration>) tag;
                for (ImageLoaderConfiguration imageLoader : loaders.values()) {
                    imageLoader.loader.terminate();
                }
            }
            pll.blockLayoutRequests = true;
            gallery.cleanup();
            gallery.setTag(null);
            vg.removeViewAt(1);
            vg.measure(View.MeasureSpec.makeMeasureSpec(vg.getRight() - vg.getLeft(), View.MeasureSpec.EXACTLY),
                    View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
            vg.layout(vg.getLeft(), vg.getTop(), vg.getRight(), vg.getTop() + vg.getMeasuredHeight());
            pll.blockLayoutRequests = false;
        }
    }
}

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From source file:com.cnpeng.cnpeng_mydemosfrom2016_12.a_12_GetLocalFiles_VP_FM.CustomNoPreLoadViewPager.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).//from   w ww. j a  v a  2  s . c  om
 * @param dx     Delta scrolled in pixels
 * @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 dx, 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, dx, x + scrollX - child.getLeft(), y + scrollY - child.getTop())) {
                return true;
            }
        }
    }

    return checkV && ViewCompat.canScrollHorizontally(v, -dx);
}

---

From source file:com.dk.view.FolderDrawerLayout.java

private boolean createCache() {
    ViewGroup left = (ViewGroup) findDrawerWithGravity(Gravity.LEFT);

    if (left.getChildCount() > 0 && !(left.getChildAt(0) instanceof MeshImageView)) {
        mDrawingCache = drawViewToBitmap(mDrawingCache, left, left.getWidth(), left.getHeight(), 1,
                new BitmapDrawable());

        if (mCoreCalc == null)
            mCoreCalc = new CoreCalc(left.getWidth(), left.getHeight());
        return true;
    } else {/*w  ww.  j  a  va  2 s. com*/
        return false;
    }

}

---

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

private void setVisibilityOnChildren(ViewGroup layout, int visibility) {
    int childCount = layout.getChildCount();
    for (int i = 0; i < childCount; ++i) {
        layout.getChildAt(i).setVisibility(visibility);
    }//from w  w  w . j ava2 s .co m
}

---

From source file:me.bemind.sidemenu.SideMenu.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 dx Delta scrolled in pixels//from w w  w .j  a  va 2 s.  c o  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 dx, 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, dx, x + scrollX - child.getLeft(), y + scrollY - child.getTop())) {
                return true;
            }
        }
    }

    /* special case ViewPagers, which don't properly implement the scrolling interface */
    return checkV && (ViewCompat.canScrollHorizontally(v, -dx) || draggedChild
            || ((v instanceof ViewPager) && canViewPagerScrollHorizontally((ViewPager) v, -dx)));

    //return checkV && ViewCompat.canScrollHorizontally(v, (isLayoutRtlSupport() ? dx : -dx));
}

---

From source file:com.miuhouse.yourcompany.student.view.widget.LazyViewPager.java

/**
 * Tests scrollability within child views of v given a delta of dx.
 *
 * @param v/*from w w w . j a v  a 2  s  .c  o  m*/
 *            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 dx
 *            Delta scrolled in pixels
 * @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 dx, 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--) {
            // 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, dx, x + scrollX - child.getLeft(), y + scrollY - child.getTop())) {
                return true;
            }
        }
    }

    return checkV && ViewCompat.canScrollHorizontally(v, -dx);
}

---

From source file:cn.bingoogolapple.swipebacklayout.BGASwipeBackLayout.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 dx     Delta scrolled in pixels
 * @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.
 *//*  www  .ja  va2s .c o m*/
protected boolean canScroll(View v, boolean checkV, int dx, 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, dx, x + scrollX - child.getLeft(), y + scrollY - child.getTop())) {
                return true;
            }
        }
    }

    return checkV && ViewCompat.canScrollHorizontally(v, (isLayoutRtlSupport() ? dx : -dx));
}

---

From source file:com.taobao.weex.WXSDKInstance.java

private void destroyView(View rootView) {
    try {//from w w  w.  j  a  v a 2  s.  co m
        if (rootView instanceof ViewGroup) {
            ViewGroup cViewGroup = ((ViewGroup) rootView);
            for (int index = 0; index < cViewGroup.getChildCount(); index++) {
                destroyView(cViewGroup.getChildAt(index));
            }

            cViewGroup.removeViews(0, ((ViewGroup) rootView).getChildCount());
            // Ensure that the viewgroup's status to be normal
            WXReflectionUtils.setValue(rootView, "mChildrenCount", 0);

        }
        if (rootView instanceof Destroyable) {
            ((Destroyable) rootView).destroy();
        }
    } catch (Exception e) {
        WXLogUtils.e("WXSDKInstance destroyView Exception: ", e);
    }
}

---

From source file:com.chenglong.muscle.ui.LazyViewPager.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 dx     Delta scrolled in pixels
 * @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.
 *///from w  ww .  ja va2  s . c o m
protected boolean canScroll(View v, boolean checkV, int dx, 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, dx, x + scrollX - child.getLeft(), y + scrollY - child.getTop())) {
                return true;
            }
        }
    }
    return checkV && ViewCompat.canScrollHorizontally(v, -dx);
}

---

From source file:android.support.v7.app.AppCompatDelegateImplV7.java

private void ensureSubDecor() {
    if (!mSubDecorInstalled) {
        final LayoutInflater inflater = LayoutInflater.from(mContext);

        if (!mWindowNoTitle) {
            if (mIsFloating) {
                // If we're floating, inflate the dialog title decor
                mSubDecor = (ViewGroup) inflater.inflate(R.layout.abc_dialog_title_material, null);
            } else if (mHasActionBar) {
                /**// w w  w. j av a  2s  .c  o  m
                 * This needs some explanation. As we can not use the android:theme attribute
                 * pre-L, we emulate it by manually creating a LayoutInflater using a
                 * ContextThemeWrapper pointing to actionBarTheme.
                 */
                TypedValue outValue = new TypedValue();
                mContext.getTheme().resolveAttribute(R.attr.actionBarTheme, outValue, true);

                Context themedContext;
                if (outValue.resourceId != 0) {
                    themedContext = new ContextThemeWrapper(mContext, outValue.resourceId);
                } else {
                    themedContext = mContext;
                }

                // Now inflate the view using the themed context and set it as the content view
                mSubDecor = (ViewGroup) LayoutInflater.from(themedContext).inflate(R.layout.abc_screen_toolbar,
                        null);

                mDecorContentParent = (DecorContentParent) mSubDecor.findViewById(R.id.decor_content_parent);
                mDecorContentParent.setWindowCallback(getWindowCallback());

                /**
                 * Propagate features to DecorContentParent
                 */
                if (mOverlayActionBar) {
                    mDecorContentParent.initFeature(FEATURE_ACTION_BAR_OVERLAY);
                }
                if (mFeatureProgress) {
                    mDecorContentParent.initFeature(Window.FEATURE_PROGRESS);
                }
                if (mFeatureIndeterminateProgress) {
                    mDecorContentParent.initFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
                }
            }
        } else {
            if (mOverlayActionMode) {
                mSubDecor = (ViewGroup) inflater.inflate(R.layout.abc_screen_simple_overlay_action_mode, null);
            } else {
                mSubDecor = (ViewGroup) inflater.inflate(R.layout.abc_screen_simple, null);
            }

            if (Build.VERSION.SDK_INT >= 21) {
                // If we're running on L or above, we can rely on ViewCompat's
                // setOnApplyWindowInsetsListener
                ViewCompat.setOnApplyWindowInsetsListener(mSubDecor, new OnApplyWindowInsetsListener() {
                    @Override
                    public WindowInsetsCompat onApplyWindowInsets(View v, WindowInsetsCompat insets) {
                        final int top = insets.getSystemWindowInsetTop();
                        final int newTop = updateStatusGuard(top);

                        if (top != newTop) {
                            insets = insets.replaceSystemWindowInsets(insets.getSystemWindowInsetLeft(), newTop,
                                    insets.getSystemWindowInsetRight(), insets.getSystemWindowInsetBottom());
                        }

                        // Now apply the insets on our view
                        return ViewCompat.onApplyWindowInsets(v, insets);
                    }
                });
            } else {
                // Else, we need to use our own FitWindowsViewGroup handling
                ((FitWindowsViewGroup) mSubDecor)
                        .setOnFitSystemWindowsListener(new FitWindowsViewGroup.OnFitSystemWindowsListener() {
                            @Override
                            public void onFitSystemWindows(Rect insets) {
                                insets.top = updateStatusGuard(insets.top);
                            }
                        });
            }
        }

        if (mSubDecor == null) {
            throw new IllegalArgumentException("AppCompat does not support the current theme features");
        }

        if (mDecorContentParent == null) {
            mTitleView = (TextView) mSubDecor.findViewById(R.id.title);
        }

        // Make the decor optionally fit system windows, like the window's decor
        ViewUtils.makeOptionalFitsSystemWindows(mSubDecor);

        final ViewGroup decorContent = (ViewGroup) mWindow.findViewById(android.R.id.content);
        final ViewGroup abcContent = (ViewGroup) mSubDecor.findViewById(R.id.action_bar_activity_content);

        // There might be Views already added to the Window's content view so we need to
        // migrate them to our content view
        while (decorContent.getChildCount() > 0) {
            final View child = decorContent.getChildAt(0);
            decorContent.removeViewAt(0);
            abcContent.addView(child);
        }

        // Now set the Window's content view with the decor
        mWindow.setContentView(mSubDecor);

        // Change our content FrameLayout to use the android.R.id.content id.
        // Useful for fragments.
        decorContent.setId(View.NO_ID);
        abcContent.setId(android.R.id.content);

        // The decorContent may have a foreground drawable set (windowContentOverlay).
        // Remove this as we handle it ourselves
        if (decorContent instanceof FrameLayout) {
            ((FrameLayout) decorContent).setForeground(null);
        }

        // If a title was set before we installed the decor, propogate it now
        CharSequence title = getTitle();
        if (!TextUtils.isEmpty(title)) {
            onTitleChanged(title);
        }

        applyFixedSizeWindow();

        onSubDecorInstalled(mSubDecor);

        mSubDecorInstalled = true;

        // Invalidate if the panel menu hasn't been created before this.
        // Panel menu invalidation is deferred avoiding application onCreateOptionsMenu
        // being called in the middle of onCreate or similar.
        // A pending invalidation will typically be resolved before the posted message
        // would run normally in order to satisfy instance state restoration.
        PanelFeatureState st = getPanelState(FEATURE_OPTIONS_PANEL, false);
        if (!isDestroyed() && (st == null || st.menu == null)) {
            invalidatePanelMenu(FEATURE_ACTION_BAR);
        }
    }
}

---

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