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kotlinlang

Hello guys, how can I run kotlin extensions from java?

quver: `FileNameKt.someExtension(receiver);`

To extend on that, you can put an `@file:JvmName("SomeUtils")` annotation at the very top of the file, to switch the default name `FileNameKt` for any Class name you want, to make them look like very standard Util-functions to Java code.

I have

```
@file:JvmName("AndroidExtensions")

fun Context.dpToPx(dp: Float): Int = (dp * resources.displayMetrics.density + 0.5f).toInt()```
and then I try use it in java
```
        AndroidExtensions.dpToPx(2f);

```

and got error: 
```
dpToPx
(android.content.Context,
float)
in AndroidExtensions cannot be applied
to
(float)
```

You have to pass Context (receiver) to the method.

Yeah, you have to pass the receiver of the extension function in as its first argument. So if you would do this in kotlin:
`ctx.dpToPx(2f)`
you'd do this in Java:
`AndroidExtensions.dpToPx(ctx, 2f)`

<@U2SKJHSGK> You already help me a few time! Thanks! :slightly_smiling_face: