In Android Studio 3, I\'m seeing this issue:
The specified Android SDK Build Tools version (26.0.0) is ignored, as it is below the minimum supported
Set the buildToolsVersion '26.0.2' then change classpath 'com.android.tools.build:gradle:3.0.1'.
Make sure you set compileSdkVersion to 26 whiles targetSdkVersion is also set 26.
It is also appropriate to sent set compile 'com.android.support:appcompat-v7:26.0.2'.
Many times as API's are updated. We forgot to update SDK Managers. For accessing recent API's one should always have highest API Level updated if possible should also have other regularly used lower level APIs to accommodate backward compatibility.
Go to build.gradle (module.app) file
change compileSdkVersion
buildToolsVersion
targetSdkVersion, all should have the highest level of API.