An Android developer podcast where we talk about building good software and becoming better Android developers

Donn Felker

Kaushik Gopal

Fragmented

In this fragment episode, Donn talks about Kotlin extension functions. He discusses what they are, how to build them, why they're useful, how to organize them, visibility and how to call them Java and much more.


In this fragment episode, Donn talks about Kotlin extension functions. He discusses what they are, how to build them, why they're useful, how to organize them, visibility and how to call them Java and much more.

## Show Notes

* [Kotlin Extension Functions Docs](https://kotlinlang.org/docs/reference/extensions.html)
* [Calling Extension Functions from Java](https://stackoverflow.com/a/28364983)
* [Kotlin KTX View Functions](https://android.github.io/android-ktx/core-ktx/androidx.view/android.view.-view/index.html)

```

import android.view.View

fun View.gone() {

    this.visibility = View.GONE
}

fun View.visible() {

    this.visibility = View.VISIBLE
}

```

## Contact

*   [@fragmentedcast](https://twitter.com/fragmentedcast) [twitter.com]
*   [@donnfelker](https://twitter.com/donnfelker) and [+DonnFelker](https://plus.google.com/+DonnFelker)
*   [@kaushikgopal](https://twitter.com/kaushikgopal/) and [+KaushikGopalIsMe](https://plus.google.com/+KaushikGopalIsMe)


Donn Felker

@donnfelker

Kaushik Gopal

@kaushikgopal

Fragmented · September 24, 2018

136: Kotlin Extension Functions

Show Notes

Contact