Could not resolve com.android.support:design 28.0.0

[john123q]

I am getting below error in my new Android studio version, when I want add floating EditText. I need to add this android.support.design library if I add this in gradle file
This is errors which i'm getting in logcat

Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve com.android.support:design-v7:28.0.0 Open File Show Details

Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve com.android.support:design-v7:28.0.0. Open File Show Details

Unable to resolve dependency for ':app@debugUnitTest/compileClasspath': Could not resolve com.android.support:design-v7:28.0.0. Open File Show Details

Unable to resolve dependency for ':app@release/compileClasspath': Could not resolve com.android.support:design-v7:28.0.0. Open File Show Details

Unable to resolve dependency for ':app@releaseUnitTest/compileClasspath': Could not resolve com.android.support:design-v7:28.0.0. Open File Show Details

Note: I referred more links I tried all solutions even though I didn't get solution.