groovy implementation 'com.android.support:core-utils:28.0.0' import android.support.v4.text.TextUtilsCompat; import android.support.v4.view.ViewCompat; String str = "Hello World"; String s1 = "Hello"; String s2 = "World"; String combinedString = TextUtils.concat(s1, " ", s2).toString(); String s3 = "Hello"; String s4 = "hello"; boolean areStringsEqual = TextUtils.equals(s3, s4); String s5 = "Café"; String s6 = "Cafe"; boolean areStringsEqualIgnoringAccent = TextUtilsCompat.equals(s5, s6);