Find centralized, trusted content and collaborate around the technologies you use most.
Teams
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
我刚开始在我的 android 应用程序和add action 按钮或从中拖动的圆圈中实现导航，在导航设计视图中禁用如下，并且如您所见也Set as Start Destination被禁用，如何启用它？
add action
Set as Start Destination
