The specified Android SDK Build Tools version (26.0.2) is   
ignored, as it is below the minimum supported version (27.0.3) 
for Android Gradle Plugin 3.1.2.
Android SDK Build Tools 27.0.3 will be used.
To suppress this warning, remove "buildToolsVersion '26.0.2'" 
from    your build.gradle file, as each version of the Android 
Gradle Plugin    now has a default version of the build tools.
Update Build Tools version and sync project
 Open File


Configuration 'compile' is obsolete and has been replaced with 
'implementation' and 'api'.
It will be removed at the end of 2018. For more information see: 
http://d.android.com/r/tools/update-dependency-configurations.html

如果你出現(xiàn)這個錯誤，且你已經(jīng)在你的APP里面修改你build.gradle文件，但還是出錯，這個時候你就要注意了，可能是你所依賴的項目里面還有沒有更改的。

所以，你只要看下你依賴的包里面有沒有還未更改的build.gradle，你把它改過來就可以了。