I don't seem to be getting a live preview? :confused:

# compose

[Fudge]

I don't seem to be getting a live preview? 😕

[Cody Engel]

Did you re-run?

[Cody Engel]

I also noticed that Preview doesn’t display if you have split view setup in the IDE, it seems to only work if you only have one tab open

[Fudge]

do you mean re-build? I didn't try running the app.

[Cody Engel]

The IDE should prompt you to rebuild anytime you change something for Compose

[Cody Engel]

[Fudge]

Not getting it!

[romainguy]

Rebuilding should be all you need

[Fudge]

There's something wrong with my install, then.

[Cody Engel]

What version of Android Studio are you running?

[Fudge]

4.0 canary 1

[Cody Engel]

@Fudge can you check out PostCardTop? That preview seems to work for me, adding @Preview is not working for me in JetnewsApp.kt

[Fudge]

you're totally right

[Cody Engel]

@romainguy — adding Preview to certain Composables seems to be broken at least in the sample project

[jim]

The @Preview annotation can only be applied to composable functions with zero parameters. Otherwise, the IDE doesn't know what values to pass in for those parameters.

[Cody Engel]

@jim — the IDE will provide a warning, the screenshot above has @Preview on a zero parameter function.

[Luca Nicoletti]

@jim what if functions with parameter have default values?

[Fudge]

That’s not really related considering the function had no parameters in this case.

[Luca Nicoletti]

@Fudge sorry, just curiosity 😛