alwarren

/**
 * A helper class for building REST API endpoints.
 */
class Endpoint(
        val path: String,
        val query: String,
        val value: String) {

    // Returns a list of objects containing a subset of object properties
    class Filter {

alwarren

apply plugin: 'com.android.library'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
apply plugin: 'kotlin-kapt'

android {
    compileSdkVersion 27
    defaultConfig {
        minSdkVersion 19
        targetSdkVersion 27

alwarren

import okhttp3.*
import retrofit2.Call
import retrofit2.Retrofit
import retrofit2.converter.scalars.ScalarsConverterFactory
import retrofit2.http.GET

import java.io.File
import java.io.IOException
import java.security.cert.X509Certificate
import javax.net.ssl.SSLContext

alwarren

// See https://medium.com/@iammert/using-diffutil-in-android-recyclerview-bdca8e4fbb00

fun <T> RecyclerView.Adapter<*>.autoNotify(oldList: List<T>, newList: List<T>, compare: (T, T) -> Boolean) {
    val diff = DiffUtil.calculateDiff(object : DiffUtil.Callback() {

        override fun areItemsTheSame(oldItemPosition: Int, newItemPosition: Int): Boolean {
            return compare(oldList[oldItemPosition], newList[newItemPosition])
        }

        override fun areContentsTheSame(oldItemPosition: Int, newItemPosition: Int): Boolean {

alwarren

Task: Manually add a Java module in Android Studio

Steps

1. Switch to Project view.
2. In the project root folder, create a folder with a unique identifiable name for the module. This folder becomes the root folder for the module.
3. Within the module's root folder, create a src/main/java folder.
4. Within the module's root folder, create a build.gradle file.
5. Within the module's build.gradle, insert the following two lines:

alwarren

import java.text.DateFormat
import java.text.SimpleDateFormat

// Top-level build file where you can add configuration options common to all sub-projects/modules.

// your other gradle code here

static def getDateTime() {
    DateFormat df = new SimpleDateFormat("YYYYMMddHHmm");
    return df.format(new Date());

alwarren

public class SingletonClass {
    // dummy object for synchronization
    private static final Object sLock = new Object();

    // single instance of the class
    private static SingletonClass INSTANCE;

    public static SingletonClass getInstance() {
        // force threads to wait until synchronized block completes
        synchronized (sLock) {

alwarren

/**
 * A generic wrapper class for determining the success or failure of some method
 *
 * In the business logic, examine the instance class to determine success or failure
 *
 * Example -
 * <pre>
 *     <code>
 *         val result: ResponseObject = SomeRepository().getData(true)
 *         if (result is ResponseObject.Success) {

alwarren

class SwitchMapViewModel @Inject constructor(private val dataSource: Data) : ViewModel() {

    // observed by ViewModel as a trigger to retrieve data from the source
    private var liveTrigger: MutableLiveData<String> = MutableLiveData()

    // observed by Activity/Fragment or some other class as a trigger to do something with the data
    private var liveData: LiveData<String>

    init {
        // default observable trigger