android-components / mozilla.components.concept.toolbar / Toolbar / ActionButton / <init>

# <init>

`ActionButton(imageDrawable: Drawable? = null, contentDescription: String, visible: () -> Boolean = { true }, background: Int = 0, padding: Padding? = null, listener: () -> Unit)`

An action button to be added to the toolbar.

### Parameters

`imageDrawable` - The drawable to be shown.

`contentDescription` - The content description to use.

`visible` - Lambda that returns true or false to indicate whether this button should be shown.

`padding` - A optional custom padding.

`listener` - Callback that will be invoked whenever the button is pressed