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将图一加入图二、三的报错：
Caused by: org.gradle.api.InvalidUserCodeException: Build was configured to prefer settings repositories over project repositories but repository 'maven' was added by build file 'build.gradle'
图三的报错：
Could not compile build file 'D:\newtry\build.gradle'.
> startup failed:
build file 'D:\newtry\build.gradle': 5: only id(String) method calls allowed in plugins {} script block
按这个
图三的报错：
Could not compile build file 'D:\newtry\build.gradle'.
> startup failed:
build file 'D:\newtry\build.gradle': 5: only id(String) method calls allowed in plugins {} script block
这个报错说的是你plugins的报错。
如果添加仓库依赖不会，就直接下载下来，然后手动添加依赖，这个会吗？
https://github.com/Tamsiree/RxTool/releases
去这个网址下载，然后手动添加依赖。