安卓记账本开发学习day5之版本兼容问题

安卓5.0以上版本想要隐藏DatePicker头布局的写法比较复杂，需要一层一层隐藏

        int headerId = getContext().getResources().getIdentifier("day_picker_selector_layout", "id", "android");if (headerId == headerView.getId()) {
            headerView.setVisibility(View.GONE);
            ViewGroup.LayoutParams layoutParams = rootView.getLayoutParams();
            layoutParams.width = ViewGroup.LayoutParams.WRAP_CONTENT;
            rootView.setLayoutParams(layoutParams);

            ViewGroup animator = (ViewGroup) rootView.getChildAt(1);
            ViewGroup.LayoutParams layoutParamsAnimator = animator.getLayoutParams();
            layoutParamsAnimator.width = ViewGroup.LayoutParams.WRAP_CONTENT;
            animator.setLayoutParams(layoutParamsAnimator);

            View child = animator.getChildAt(0);
            ViewGroup.LayoutParams layoutParamsChild = child.getLayoutParams();
            layoutParamsChild.width = ViewGroup.LayoutParams.WRAP_CONTENT;
            child.setLayoutParams(layoutParamsChild);
            return;
        }

安卓6.0以上提供了新的方式

        headerId = getContext().getResources().getIdentifier("date_picker_header", "id", "android");
        if (headerId == headerView.getId()) {
            headerView.setVisibility(View.GONE);
        }

自己根据项目的SDK版本选择写法即可，想要获得更高的兼容性，可以二者都写