发现在调整页面的时候 ，老是报以下错误，导致无法静态显示ui效果。

Missing styles. Is the correct theme chosen for this layout?

Use the Theme combo box above the layout to choose a different layout, or fix the theme style references.

Failed to find style ‘textViewStyle‘ in current theme

解决方法如下：

layout预览界面（Graphic Layout）,右上角有个Theme的选择项，默认为notitle，根据喜好随意设定值，我们这里设定为android以前默认的Theme.black.

或可选：Theme.Light.NotitleBar

android xml 布局错误（黑掉了）Missing styles. Is the correct theme chosen for this layout?