参考:
1.https://blog.mindorks.com/using-constraint-layout-in-android-531e68019cd
2.https://codelabs.developers.google.com/codelabs/constraint-layout/#0
3.https://developer.android.com/studio/write/layout-editor.html
参考:
1.https://blog.mindorks.com/using-constraint-layout-in-android-531e68019cd
2.https://codelabs.developers.google.com/codelabs/constraint-layout/#0
3.https://developer.android.com/studio/write/layout-editor.html