How to set `null` as the default value for a nullable argument using SafeArgs?

问题

How should I pass in null as default value for a String argument such as this:

<argument
    android:name="profile_id"
    android:defaultValue="???"
    app:argType="string"
    app:nullable="true" />

If the argument is nullable there should be a way to pass in null right?

回答1:

Turns out the good old @null works

<argument
    android:name="profile_id"
    android:defaultValue="@null"
    app:argType="string"
    app:nullable="true" />

来源：https://stackoverflow.com/questions/53661394/how-to-set-null-as-the-default-value-for-a-nullable-argument-using-safeargs