Menu
The documentation discusses how to send simple integers and strings. For example:
<argument
android:name="myIntArg"
android:defaultValue="255"
app:argType="integer" />
In the origin Fragment:
val action = OriginFragmentDirections.myAction(myInt)
findNavController().navigate(action)
In the destination Fragment:
val receivedInt = DestinationFragmentArgs.fromBundle(arguments).myIntArg
But say instead of myIntArg, I wanted to send an enum (myEnumArg). How would I do that? What app:argType would I use in my argument?
633
enums are technically descendants of Enum class. So, if you want to use only Enum's standard methods in your method (such as values()), pass the parameter like this: static void printEnumValue(Enum generalInformation) See, that the only thing you have to change is the capital letter E.
SafeArgs is a gradle plugin that allows you to Pass data to destination UI components. It generates simple object and builder classes for type-safe navigation and access to any associated arguments. Safe Args is strongly recommended for navigating and passing data because it ensures type-safety.
Edit: As per the Navigation 1.0.0-alpha08 release notes:
Safe Args supports Serializable objects, including Enum values. Enum types can set a default value by using the enum literal without the class name (e.g.
app:defaultValue="READ") b/111316353
So this is now possible - you would use the name of your Enum class (i.e., com.example.EnumClass) or a relative name (.EnumClass) which will automatically prepend your app's package name to the class name.
Previous answer:
This is not possible with the current version of Navigation (1.0.0-alpha07), but the existing feature request is marked as fixed and the ability to use enums as arguments will be available in alpha08
69
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
