**使用 ConstraintLayout 构建自适应界面 ** 🔗https://developer.android.com/training/constraint-layout/ (opens new window)

ConstraintLayout 🔗https://developer.android.com/reference/android/support/constraint/ConstraintLayout (opens new window)

Welcome to ConstraintLayout.com 🔗https://constraintlayout.com/ (opens new window)