chetdeva

/**
 * A data source that uses the before/after keys returned in page requests.
 */
class GithubPageKeyedDataSource : PageKeyedDataSource<Int, Item>() {

    override fun loadInitial(params: LoadInitialParams<Int>,
                             callback: LoadInitialCallback<Int, Item>) {

        val currentPage = 1
        val nextPage = currentPage + 1

chetdeva

/**
 * A data source that uses the "name" field of posts as the key for next/prev pages.
 */
class ItemKeyedSubredditDataSource : ItemKeyedDataSource<String, RedditPost>() {

    override fun loadInitial(params: LoadInitialParams<String>,
                             callback: LoadInitialCallback<RedditPost>) {

        val request = redditApi.getTop(
                subreddit = subredditName,

chetdeva

import 'package:flutter/material.dart';

void main() => runApp(new MyApp()); // Application

class MyApp extends StatelessWidget { // MainActivity
  
  @override
  Widget build(BuildContext context) {  // onCreate
    return new MaterialApp(
      title: 'Flutter Demo',  // app_name

chetdeva

quantity.addOnPropertyChangedCallback(object : Observable.OnPropertyChangedCallback() {
    override fun onPropertyChanged(p0: Observable, p1: Int) {
        presenter.onItemQuantityChange(cartItem, p0.get())
    }
})

chetdeva

<Spinner
    android:id="@+id/item_quantity_spinner"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginStart="8dp"
    android:background="@drawable/ic_spinner_bg"
    android:gravity="center_vertical"
    android:paddingStart="4dp"
    app:layout_constraintBottom_toBottomOf="parent"
    android:textSize="16sp"

chetdeva

class InverseSpinnerBindings {

    @BindingAdapter("selectedValue")
    fun Spinner.setSelectedValue(selectedValue: Any?) {
        setSpinnerValue(selectedValue)
    }

    @BindingAdapter("selectedValueAttrChanged")
    fun Spinner.setInverseBindingListener(inverseBindingListener: InverseBindingListener?) {
        setSpinnerInverseBindingListener(inverseBindingListener)

chetdeva

<android.support.design.widget.FloatingActionButton
    android:id="@+id/add_to_cart_fab"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="bottom|end"
    android:layout_margin="16dp"
    android:onClick="@{() -> presenter.onAddToCartClick(model.cartItem)}"
    android:src="@drawable/ic_add_shopping_cart_white_24dp"
    android:tint="@android:color/white" />

chetdeva

<Spinner
    android:id="@+id/item_quantity_spinner"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginStart="8dp"
    android:background="@drawable/ic_spinner_bg"
    android:gravity="center_vertical"
    android:paddingStart="4dp"
    android:textSize="16sp"
    app:entries="@{model.quantityEntries}"

chetdeva

class SpinnerBindings {

    @BindingAdapter("entries")
    fun Spinner.setEntries(entries: List<Any>?) {
        setSpinnerEntries(entries)
    }

    @BindingAdapter("onItemSelected")
    fun Spinner.setItemSelectedListener(itemSelectedListener: ItemSelectedListener?) {
        setSpinnerItemSelectedListener(itemSelectedListener)

chetdeva

class CartItemViewModel(var cartItem: CartItem,
                        val name: ObservableField<String> = ObservableField(cartItem.name),
                        val description: ObservableField<String> = ObservableField(cartItem.description),
                        val image: ObservableField<Drawable> = ObservableField(cartItem.image),
                        val price: ObservableField<Double> = ObservableField(cartItem.quantifiedPrice),
                        val quantity: ObservableField<Int> = ObservableField(cartItem.quantity),
                        val quantityEntries: ObservableField<List<Int>> = ObservableField(cartItem.maxQuantity.populateList())) {

    fun update(cartItem: CartItem) {
        this.cartItem = cartItem