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Version: v20

Create Kotlin formatter

OBJETIVOS

Create your first Kotlin formatters.

A formatter can be composed of both Kotlin and Swift code.

Object attribute Kotlin formatter​

If you want a formatter that will enable you to dial a phone number value on click, we need a manifest.json file containing a name, a binding, a type and a target value as follows:

{
    "name": "phone",
    "binding": "phoneAction",
    "type": "text" 
    "target" : ["ios", "android"]
}

Note that the binding value "phoneAction" will be used in the Kotlin file and that the BindingAdapter will interact with a specific field in an Android XML layout.

Here is the PhoneAction.kt file to dial a phone number value on click on Android:

package ___PACKAGE___

import android.content. Intent
import android.net. Uri
import android.widget. TextView
import androidx.databinding. BindingAdapter

@BindingAdapter("phoneAction")
fun phoneAction(view: TextView, phoneAction: String?) {
    if (phoneAction.isNullOrEmpty()) return
    view.text = phoneAction
    view.setOnClickListener {
        val dialIntent = Intent(Intent.ACTION_DIAL)
        dialIntent.data = Uri.parse("tel:$phoneAction")
        view.context.startActivity(dialIntent)
    }
} {
    if (phoneAction.isNullOrEmpty()) return
    view.text = phoneAction
    view.setOnClickListener {
        val dialIntent = Intent(Intent.ACTION_DIAL)
        dialIntent.data = Uri.parse("tel:$phoneAction")
        view.context.startActivity(dialIntent)
    }
}

Putting all that together, you can save this formatter as a .kt file in the formatter folder and use it in your mobile project.

Architecture

Check out the final result:

Final result