在Android Studio 3.0中，我想在设备上看到布局预览设计，但不幸的是它没有显示。请帮助我

Question

这是该屏幕的屏幕截图，在安装Android Studio 3.0之后，我遇到了这个问题。

Answer 1

Click on the theme selector in the preview window ("MaterialTheme") and select an AppCompat one (or make your theme have that as parent).

The support components won't get rendered unless you select an AppCompat theme. I guess the MaterialTheme is your custom one, so just make sure it uses the appropriate theme as parent.