android 键盘遮挡 父布局上滚解决

 private void controlKeyboardLayout(final View root, final View scrollToView) {  
        root.getViewTreeObserver().addOnGlobalLayoutListener( new OnGlobalLayoutListener() {  
            @Override  
            public void onGlobalLayout() {  
                Rect rect = new Rect();  
                //获取root在窗体的可视区域  
                root.getWindowVisibleDisplayFrame(rect);  
                //获取root在窗体的不可视区域高度(被其他View遮挡的区域高度)  
                int rootInvisibleHeight = root.getRootView().getHeight() - rect.bottom;  
                //若不可视区域高度大于100，则键盘显示  
                if (rootInvisibleHeight > 200) {  
                    int[] location = new int[2];  
                    //获取scrollToView在窗体的坐标  
                    scrollToView.getLocationInWindow(location);  
                    //计算root滚动高度，使scrollToView在可见区域  
                    int srollHeight = (location[1] + scrollToView.getHeight()) - rect.bottom;  
                    root.scrollTo(0, srollHeight);
                } else {  
                    //键盘隐藏  
                    root.scrollTo(0, 0);  
                }  
            }  
        });  
    }