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No activity found in the manifest with action MAIN and category LAUNCHER.
Your application may not start correctly.
No activity with LEANBACK_LAUNCHER or LAUNCHER categories found.
The build may not be compatible with Android TV. Specify an activity with LEANBACK_LAUNCHER or LAUNCHER category in the manifest, or disable Android TV compatibility in Player Settings.
Unable to find unity activity in manifest. You need to make sure orientation attribute is set to fullSensor manually.
OBSOLETE - Providing Android resources in Assets/Plugins/Android/res is deprecated, please move your resources to an Android Library. See "Building Plugins for Android" section of the Manual.
这个错误的关键地方在这里
No activity found in the manifest with action MAIN and category LAUNCHER.
就是你在android工程里面的menifest配置文件里面 定义了一个不存在的
可以试下这个解决方案
https://forum.unity3d.com/threads/obsolete-providing-android-resources-in-assets-plugins-android-res-is-deprecated.315889/
You can create a new Android Library project that doesn't have any code in it.
Add your version.xml file to this project (under the res/values folder) and then copy the library (the entire folder structure) under Assets/Plugins.
新建一个android library工程，把该添加的添加上去，然后复制整个libray文件夹到 unity的 assets/plugins文件夹下
已经自己解决了老师，真的累，建议老师把以前的视频更新一下，要不里面好多现在都变了，像我们这种萌新真的懵圈
