Android studio的preview界面无法显示

码拜

9年 ago

求高手知道，菜鸟刚入门！无法拖进布局按钮
Rendering Problems The following classes could not be instantiated:
– android.support.design.widget.AppBarLayout (Open Class, Show Exception, Clear Cache)
– android.support.design.widget.CoordinatorLayout (Open Class, Show Exception, Clear Cache)
Tip: Use View.isInEditMode() in your custom views to skip code or show sample data when shown in the IDE
Exception Details java.lang.NoClassDefFoundError: Could not initialize class android.support.design.widget.ThemeUtils at android.support.design.widget.AppBarLayout.<init>(AppBarLayout.java:145) at java.lang.reflect.Constructor.newInstance(Constructor.java:525) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704) at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:835) at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:70) at android.view.LayoutInflater.rInflate(LayoutInflater.java:811) at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798) at android.view.LayoutInflater.inflate(LayoutInflater.java:515) at android.view.LayoutInflater.inflate(LayoutInflater.java:394) Copy stack to clipboard

解决方案

右上角有个23的版本号，改一下版本试试

AppBarLayout 不能初始化。试试1L说的，要么就把布局中的AppBarLayout 删了。

自定义的组件是显示不出来的，点进去AppBarLayout 看看父类先改成它继承android原代的组件看看预览再改回来吧