Android custom view starting point to copy-paste instead of remembering. This is a simple case of a view displaying parameters from xml and offering an onclick functionality.

attrs.xml

<resources>
    <declare-styleable name="IconView">
        <attr name="image" format="reference|color" />
        <attr name="title" format="string" />
    </declare-styleable>
</resources>

icon_view.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:orientation="vertical" android:layout_width="wrap_content"
    android:layout_height="wrap_content">

    <ImageView
        android:id="@+id/iconImageView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:srcCompat="@mipmap/ic_launcher" />

    <TextView
        android:id="@+id/titleTextView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="TextView"
        android:textAlignment="center"
        android:textStyle="bold" />
</LinearLayout>

IconView.kt

import android.content.Context
import android.util.AttributeSet
import android.widget.LinearLayout
import kotlinx.android.synthetic.main.icon_view.view.*

class IconView @JvmOverloads constructor(
    context: Context,
    attrs: AttributeSet? = null
) : LinearLayout(context, attrs) {

    var onClick: (() -> Unit)? = null

    init {
        inflate(context, R.layout.icon_view, this)
        attrs?.apply()
        setOnClickListener { onClick?.invoke() }
    }

    private fun AttributeSet.apply() {
        val arr = context.obtainStyledAttributes(this, R.styleable.IconView)

        titleTextView.text = arr.getString(R.styleable.IconView_title)

        iconImageView.setImageResource(
            arr.getResourceId(
                R.styleable.IconView_image,
                R.drawable.placeholder_24dp
            )
        )

        arr.recycle()
    }

}