ViewGroup中removeAllViews()和removeAllViewsInLayout()之间的区别

标签：android   布局   

下面是removeAllViewsInLayout()的源码

/**
     * Called by a ViewGroup subclass to remove child views from itself,
     * when it must first know its size on screen before it can calculate how many
     * child views it will render. An example is a Gallery or a ListView, which
     * may "have" 50 children, but actually only render the number of children
     * that can currently fit inside the object on screen. Do not call
     * this method unless you are extending ViewGroup and understand the
     * view measuring and layout pipeline.
     */
    public void removeAllViewsInLayout() {
        final int count = mChildrenCount;
        if (count <= 0) {
            return;
        }

        final View[] children = mChildren;
        mChildrenCount = 0;

        final View focused = mFocused;
        final boolean detach = mAttachInfo != null;
        View clearChildFocus = null;

        needGlobalAttributesUpdate(false);

        for (int i = count - 1; i >= 0; i--) {
            final View view = children[i];

            if (mTransition != null) {
                mTransition.removeChild(this, view);
            }

            if (view == focused) {
                view.clearFocusForRemoval();
                clearChildFocus = view;
            }

            if (view.getAnimation() != null ||
                    (mTransitioningViews != null && mTransitioningViews.contains(view))) {
                addDisappearingView(view);
            } else if (detach) {
               view.dispatchDetachedFromWindow();
            }

            onViewRemoved(view);

            view.mParent = null;
            children[i] = null;
        }

        if (clearChildFocus != null) {
            clearChildFocus(clearChildFocus);
        }
    }

方法removeAllViews()的源码

/**
     * Call this method to remove all child views from the
     * ViewGroup.
     */
    public void removeAllViews() {
        removeAllViewsInLayout();
        requestLayout();
        invalidate(true);
    }

ViewGroup中removeAllViews()和removeAllViewsInLayout()之间的区别

标签：android   布局   

原文地址：http://blog.csdn.net/stzy00/article/details/43966149