Quick question how can I see the preview of a Composable int kotlinlang #compose

/**
 * Simple text on the screen
 * @sample DefaultPreview
 */
@Composable
fun Greeting(name: String) {
    Text(text = "Hello $name!")
}

@Preview(showBackground = true)
@Composable
fun DefaultPreview() {
    MyAppTheme {
        Greeting("Androids")
    }
}

What I’m expecting is: If I type “Gre”, and then Ctrl+Space, I should see the preview of my

Greeting

composable. I’m using AS 4.2 Canary 12

This is what I get 👇

allan.conda

09/25/2020, 3:30 AM

Ahh, you meant the preview in the documentation. I didn’t know that existed 😄 sorry

nglauber

09/25/2020, 3:35 AM

No worries… 😉 This feature is also mentioned by Tor Norbye here (

https://youtu.be/NMFGuy6TRqk?t=429▾

) but it has never worked for me… 😞

romainguy

09/25/2020, 3:42 AM

Try with the fully qualified name instead

nglauber

09/25/2020, 3:45 AM

Do you mean in

@sample

I tried this

Copy code

@sample _root_ide_package_.com.example.waldyrtest.DefaultPreview()

and this

Copy code

@sample com.example.waldyrtest.DefaultPreview()

romainguy

09/25/2020, 3:50 AM

Don't put the parenthesis at the end

And definitely don't use _root etc

nglauber

09/25/2020, 3:52 AM

Same thing 😞

I put this in a separate file:

Copy code

/**
 * Simple text on the screen
 *
 * @sample com.example.waldyrtest.DefaultPreview
 */
@Composable
fun Greeting(name: String) {
    Text(text = "Hello $name!")
}

@Preview(showBackground = true)
@Composable
fun DefaultPreview() {
    MyAppTheme {
        Greeting("Androids")
    }
}

Then when I type the function name in the activity file… 👇

I remember that I asked this same question in July… https://kotlinlang.slack.com/archives/CJLTWPH7S/p1594749573264000 😩

Two months later… still not working… 😞

@Leland Richardson [G] could you help me on this?

Leland Richardson [G]

09/25/2020, 8:48 PM

hmm. I am not actually very familiar with how this feature works and haven’t used it myself. cc @nosuid who will likely know more. can you help us out?

😞 1

(sorry i cant be of more help)

🙏 1