Pooh3Mobi

import java.lang.AssertionError

data class Point(val x: Float, val y: Float)

fun pointAt(x: Float, y: Float) = Point(x, y)

data class Line(val p1: Point, val p2: Point)

infix fun Point.to(other: Point) = Line(this, other)

Pooh3Mobi

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        setSupportActionBar(toolbar)

        fab.setOnClickListener { view ->
            main()
        }

Pooh3Mobi

import androidx.lifecycle.LiveData
import androidx.lifecycle.ViewModel
import io.reactivex.Flowable
import io.reactivex.processors.BehaviorProcessor
import io.reactivex.schedulers.Schedulers

//
// In/Out/State
//

Pooh3Mobi

// A-D blocking thread
fun testA() {
    println(1)
    Thread.sleep(1000)
    println(2)
    Thread.sleep(1000)
    println(3)
}

Pooh3Mobi

class LoginFormFragment : Fragment() {

    companion object {
        fun newInstance() = LoginFormFragment()
    }

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?

Pooh3Mobi

// 計算結果を束縛
fun judgeBMI(weight: Double, height: Double): String {
    return when (
        val bmi = (height / 100)
            .let { weight / (it * it) }
        ) {
        in 0.0..18.5 -> "Low weight $bmi"
        in 18.5..25.0 -> "Normal (healthy weight)"
        in 25.0..30.0 -> "Obese Class I"
        in 30.0..35.0 -> "Obese Class II"

Pooh3Mobi

class MainActivityFragment : androidx.fragment.app.Fragment() {

    val viewModel = MainViewModel()
    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        val binding = FragmentMainBinding.inflate(inflater)
        binding.setLifecycleOwner(this)
        binding.vm = viewModel

Pooh3Mobi

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                xmlns:tools="http://schemas.android.com/tools"
                android:layout_width="match_parent"
                android:layout_height="wrap_content">


    <android.support.v7.widget.CardView
        android:id="@+id/cardView"
        xmlns:android="http://schemas.android.com/apk/res/android"

Pooh3Mobi

package com.example.oop;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
// abstract class を継承するやり方のデモコード
public class Demo {
    // このコードはデモ用のコードです。書き方についてはチーム単位や会社単位でコーディング規約があると思いますので、
    // 製品コードに書くときはそちらを優先してください。
    void demo() {

Pooh3Mobi

package com.example.calc

/*
Copyright 2018 Pooh3Mobi@GitHub

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
documentation files (the "Software"), to deal in the Software without restriction, including without limitation 
the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, 
and to permit persons to whom the Software is furnished to do so, subject to the following conditions: