do u know how can i solve this error

[Gunjan9sahoo]

Could not find com.android.support.appcompat-v7:28.0.0:.
Required by:
project :app
Search in build.gradle files

[rana01645]

Your allprojects file (build.gradle(Project)) should be like this

allprojects {
repositories {
jcenter()
google()
}
}