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package com.inperson.android.utils.leastview;

import android.content.Context;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.ViewGroup;

public class WrappableGridLayoutManager extends GridLayoutManager {

minibugdev

package com.example.hellorx;

import android.net.Uri;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;

import com.google.android.gms.appindexing.Action;
import com.google.android.gms.appindexing.AppIndex;
import com.google.android.gms.appindexing.Thing;
import com.google.android.gms.common.api.GoogleApiClient;

minibugdev

abstract class Validator() {
  var errorListener: OnErrorListener? = null
  var validateValue: Any? = null
  
  protected abstract fun hasError(): Boolean
  
  fun validate(): Boolean {
    if (hasError()) {
      errorListener?.onError()
      return false

minibugdev

// 1st by "const"
@file:JvmName("Url")
const val URL_BASE: String = "http://github.com"
const val URL_USER: String = "$URL_BASE/user"

// 2nd by "companion"
class Url {
  companion object {
    @JvmField val URL_BASE: String = "http://github.com"
    @JvmField val URL_USER: String = "$URL_BASE/user"

minibugdev

#Intro

Kotlin is a new programming language for the JVM. It produces Java bytecode, supports Android and generates JavaScript. The latest version of the language is Kotlin M5.3

Kotlin project website is at kotlin.jetbrains.org.

All the codes here can be copied and run on Kotlin online editor.

Let's get started.

minibugdev

public class CookieApplication extends Application {

    @Override
    public void onCreate() {
        super.onCreate();

        CookieHandler defaultHandler = CookieHandler.getDefault();
        if (defaultHandler == null) {
            CookieHandler.setDefault(new CookieManager(new PersistentCookieStore(this), CookiePolicy.ACCEPT_ALL));
        }

minibugdev

// สร้าง Observable ของ API
var observable = service.getWeather(CITY_NAME, getString(R.string.api_key))

    // Delay 1 วินาทีเพื่อให้ API ทำงานช้ากว่า Cache เพื่อให้เห็นภาพการทำงานง่ายขึ้น
    .delay(1L, java.util.concurrent.TimeUnit.SECONDS)

    // เขียนข้อมูลลง Realm
    .subscribeOn(Schedulers.io())
    .observeOn(Schedulers.computation())
    .map { this.writeToRealm(it) }

minibugdev

private fun findInRealm(realm: Realm, name: String): WeatherRealm? {
    return realm.where(WeatherRealm::class.java)
        .equalTo(FIELD_CITY_NAME, name)
        .findFirst()
}

minibugdev

open class WeatherRealm : RealmObject() {
    @PrimaryKey
    var name: String? = null
    var temp: Double? = null
}

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interface WeatherService {
    @GET("weather?units=metric")
    fun getWeather(@Query("q") city: String, @Query("appid") apiKey: String): Observable<WeatherResponse>
}