milhauscz

#!/bin/bash
#
# Written by Chris Arceneaux
# GitHub: https://github.com/carceneaux
# Email: carcenea@gmail.com
# Website: http://arsano.ninja
#
# Updated by Miloš Černilovský
# GitHub: https://github.com/milhauscz
#

milhauscz

<resources>
    <declare-styleable name="MaterialSpinner">
        <attr name="emptyText" format="reference|string" />
    </declare-styleable>
</resources>

milhauscz

@BindingAdapter("selectedPosition")
fun setSelectedPosition(view: MaterialSpinner, position: Int) {
    if (view.selectedPosition != position) {
        view.selectedPosition = position
    }
}

@InverseBindingAdapter(attribute = "selectedPosition")
fun getSelectedPosition(view: MaterialSpinner): Int {
    return view.selectedPosition

milhauscz

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <data>
        <import type="com.google.android.material.textfield.TextInputLayout" />

        <variable
            name="viewModel"
            type="com.example.SpinnerViewModel" />

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@BindingAdapter("items")
fun bindItems(view: MaterialSpinner, items: List<ExampleItem>?) {
    if (items == null) return
    view.setAdapter(ExampleSpinnerArrayAdapter(view.context, items))
}

milhauscz

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools">

    <data>

        <variable
            name="item"
            type="com.example.ExampleItem" />

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class ExampleSpinnerArrayAdapter(context: Context, objects: List<ExampleItem>) : MaterialSpinnerAdapter<ExampleItem>(context, objects) {
    override fun getView(position: Int, convertView: View?, parent: ViewGroup): View {
        // implement viewholder pattern
        val view: View
        // automatically generated binding class
        val binding: ExampleItemBinding
        if (convertView == null) {
            // view is new - we have to inflate the binding object and set it as a tag
            binding = ExampleItemBinding.inflate(inflater, parent, false)
            view = binding.root

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/**
 * Custom adapter for [MaterialSpinner]. Just implement [getView] to provide the given View, e. g.
 * by using [inflater]. In case of data binding, the binding object can be set as the given View's
 * tag to be able to retrieve it when reusing the given View and implement custom viewholder pattern.
 * [selectedItemPosition] can be used for updating the selected View's UI. When used together with 
 * [MaterialSpinner], [selectedItemPosition] is updated automatically and [notifyDataSetChanged] is called.
 *
 * Created by Milos Cernilovsky on 4/21/21
 */
abstract class MaterialSpinnerAdapter<T>(context: Context, private val objects: List<T>) : BaseAdapter(), Filterable {

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/**
 * Custom implementation of an Android spinner (combo box) with material theme by using AutocompleteTextView.
 * Recommended to use together with [MaterialSpinnerAdapter].
 *
 * Supports listening to and updating the selected position e. g. from a LiveData object bound via
 * the `selectedPosition` two-way binding adapter. The empty text value can be bound via 'emptyText'
 * attr (custom styleable must be declared in attrs.xml).
 *
 * If [MaterialSpinnerAdapter] is used, its [MaterialSpinnerAdapter.selectedItemPosition] is
 * automatically updated when selection changes.

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/**
 * Should be called from [Activity.onCreate].
 * @see hideSystemUI
 * @see showSystemUI
 */
fun Activity.showBelowCutout() {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
        window.attributes.layoutInDisplayCutoutMode = WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_NEVER
    }
}