Original Address http://fanjiajia.cn/2018/09/25/Android%20Studio%20Could%20not%20resolve%20com.android.support.constraint:constraint-layout:1.1.3./
Solution
Open the Android Studio is set in the Appearance & Behavior -> System Setting -> Android SDK
View SDK Tools under, where attention to the bottom right corner of the check show package detail
to see that you install ConstraintLayout
what version. I have here is 1.0.2, and I view app
the build.gradle
configuration of Yes is 1.1.3
This is a good solution, 1.0.2 can be changed here.