1.1.2 EAP just got announced, looks like it brings a lot of Android Lint fixes https://github.com/JetBrains/kotlin/blob/1.1.2/ChangeLog.md#android-support

dunno if others have also been having problems with lint checks not occurring properly in Kotlin functions, but it sounds like the fix is coming

We are working now towards migration to lint checks based on UAST, which are implemented in AS 2.4. After it’s done we expect android lint to work for Kotlin same way it works for Java.

AS2.4 + Kotlin 1.1.2 =

Error:Error converting bytecode to dex: Cause: not found: Ljava/lang/Object;

@bjartek has left the channel

@User uploaded a file: Untitled and commented: I getting an error trying to configure Kotlin with AS 2.4 Preview 3

@User uploaded a file: Untitled

@regmoraes

ext.kotlin_version

should be

1.1.2-eap-44

and

repositories

should contain

maven { url  "<http://dl.bintray.com/kotlin/kotlin-eap-1.1>" }

Not the same, but very related https://youtrack.jetbrains.com/issue/KT-17202 https://youtrack.jetbrains.com/issue/KT-17200

How can I init a val from View.onDraw() using canvas? https://github.com/mmo5/mmo5/blob/master/android/app/src/main/java/mmo5/a5inarowmmo/BoardView.kt

I would make boardModel lazy.

Oh, you cannot do that as you access canvas there.

Ok, thanks. How do I do that? Where can I get the canvas?

How about

private val boardModel by lazy(NONE) { BoardToViewModel(15, 50) }

and adding

BoardToViewModel::setWidthAndHeight(width: Int, height: Int)

?

Too much mutable state for my taste

@oshai

var theBoardModel = boardModel
        if (null == theBoardModel) {
            theBoardModel = BoardToViewModel(canvas.height, canvas.width, 15, 50)
            boardModel = theBoardModel
        }
        theBoardModel.getHorizontalLines().forEach { line ->
            canvas.drawLine(line.startX, line.startY, line.endX, line.endY, paint)
        }
        theBoardModel.getVerticalLines().forEach { line ->
            canvas.drawLine(line.startX, line.startY, line.endX, line.endY, paint)
        }
        theBoardModel.getRectangles().forEach {r ->
            paint.color = r.color
            canvas.drawRect(r.rect, paint)
        }

Here nullability can be inferred, as theBoardModel is not known outside the method. So the compiler knows that no one else, not even on a different thread can set theBoardModel back to null before it is being used further down.

👍

🙂

Anyone experiencing bugs with auto imports in android studio when using the new “inline … get() = ... “ feature in kotlin 1.1 ?

@nesl247 has left the channel

Kotlin Dependency Injection with the Reader Monad by @Jorge Castillo https://medium.com/@JorgeCastilloPr/kotlin-dependency-injection-with-the-reader-monad-7d52f94a482e Posted in #feed

is it possible to use Android Extensions in custom class? (non-Activity/Fragment/View)

As long as you have a reference to the view the extensions are defined on. Like, say I have a view with a sub-view defined with @+id/my_child_view. Then view will have a property called my_child_view, and you can grab it wherever you want:

view.my_child_view

Why use system service instead of

LayoutInflater.from(context)

Probably a holdover from an older implementation, it looks functionally the same (inspecting LayoutInflater.from).

It is, you just don’t need a typecast and it’s much more concise 😃

Changed now, in any case. 🙂

Or you can have

View.layoutInflater

top-level extension...