This app lets you explore the various attributes which can be applied to the Android implementation of FlexboxLayout and it's child views.
Additional child views can be added using the add button in the AppBar.
To control child view long press on one to enter item mode. When in item mode you can tap on other child views to change multiple views at once. You can also tap on the Delete button in the AppBar to remove the selected child views.
Further explanation of the attributes can be found at https://blog.stylingandroid.com/flexboxlayout-part-1
The network access permission is required for Crashlytics crash logging - in the event of an app crash then anonymous crash data will be uploaded.