Using string constants in deeplink URI with Jetpack Navigation

Question

Is it possible to use a string constant in the deep link URI?

Currently I have a few links, which lead to duplication of the host part:

<deepLink app:uri="www.host.com/a" />
<deepLink app:uri="www.host.com/b" />
<deepLink app:uri="www.host.com/c" />
<deepLink app:uri="www.host.com/d" />

I'm looking therefore for a way to extract somehow www.host.com.

I've been naively trying extracting it to strings.xml:

<string name="host">www.host.com</string>

and then:

<deepLink app:uri="{@string/host}/details/{id}" />

But this does not work (Improper use of wildcards and/or placeholders in deeplink URI host compilation error)

For the `strings.xml` file I used this approach: https://stackoverflow.com/a/39870268 maybe you check if this suits in your case. — Bruno Bieri, Aug 04 '20 at 09:56
@BrunoBieri Interesting solution! Solves the problem with the duplication. However is it possible to access these strings in Java/Kotlin code? — Piotr Aleksander Chmielowski, Aug 04 '20 at 10:03
Well, yes it is. You need to make the _global_ string available as a separate string entry, like in the linked answer, he had the `app_name` string. So he can use the global variable `appname` in `strings.xml` and the `app_name` variable in code. — Bruno Bieri, Aug 04 '20 at 10:05
This solves my problem. Please add your comment as an answer so I can mark it as accepted. — Piotr Aleksander Chmielowski, Aug 04 '20 at 11:27

score 0 · Accepted Answer · answered Aug 04 '20 at 11:53

0

As mentioned in the comments to this question the OP wanted to use constant strings for multiple usage in the deep link uri's. The XML feature called Entity declaration allows to do that.

A question with a similar goal was also answered here.

answered Aug 04 '20 at 11:53

Bruno Bieri

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Using string constants in deeplink URI with Jetpack Navigation

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