paulfranco

Interview Questions

Kotlin

Q1: What is a primary constructor in Kotlin? ☆☆

Answer: The primary constructor is part of the class header. Unlike Java, you don't need to declare a constructor in the body of the class. Here's an example:

jamiesanson

import androidx.fragment.app.Fragment
import androidx.lifecycle.DefaultLifecycleObserver
import androidx.lifecycle.LifecycleOwner
import androidx.lifecycle.Observer
import kotlin.properties.ReadOnlyProperty
import kotlin.reflect.KProperty

fun <T> Fragment.viewLifecycleLazy(initialise: () -> T): ReadOnlyProperty<Fragment, T> =
    object : ReadOnlyProperty<Fragment, T>, DefaultLifecycleObserver {

FrancesCoronel

Repository Title Goes Here

INSERT GRAPHIC HERE (include hyperlink in image)

Subtitle or Short Description Goes Here

ideally one sentence >

ssinss

import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;

public abstract class EndlessRecyclerOnScrollListener extends RecyclerView.OnScrollListener {
    public static String TAG = EndlessRecyclerOnScrollListener.class.getSimpleName();

    private int previousTotal = 0; // The total number of items in the dataset after the last load
    private boolean loading = true; // True if we are still waiting for the last set of data to load.
    private int visibleThreshold = 5; // The minimum amount of items to have below your current scroll position before loading more.
    int firstVisibleItem, visibleItemCount, totalItemCount;

chrisbanes

/*
 * Copyright (C) 2017 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software

VDenis

1. Store api keys in a xml file

Put xml file "api_keys.xml" in the directory "res/value/".

api_keys.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="THE_MOVIE_DB_API_TOKEN">XXXXX</string>
</resources>

dominicthomas

public class MaxHeightLinearLayout extends LinearLayout {

    private int maxHeightDp;

    public MaxHeightLinearLayout(Context context) {
        super(context);
    }

    public MaxHeightLinearLayout(Context context, AttributeSet attrs) {
        super(context, attrs);

PasanBhanu

/*
You need to call the below method once. It register the callback and fire it when there is a change in network state.
Here I used a Global Static Variable, So I can use it to access the network state in anyware of the application.
*/

// You need to pass the context when creating the class
public CheckNetwork(Context context) {
    this.context = context;
}

SyllaJay

 /**
 * Text view that allows changing the letter spacing of the text.
 * 
 * @author Pedro Barros (pedrobarros.dev at gmail.com)
 * @since May 7, 2013
 */
 public static class LetterSpacingTextView extends TextView {
        private float spacing = Spacing.NORMAL;
        private CharSequence originalText = "";

tinmegali

package com.tinmegali.daggerwithkotlin.room

import android.arch.persistence.room.Database
import android.arch.persistence.room.RoomDatabase
import android.arch.persistence.room.TypeConverters

import com.tinmegali.daggerwithkotlin.room.daos.NoteDAO
import com.tinmegali.daggerwithkotlin.room.daos.UserDAO
import com.tinmegali.daggerwithkotlin.room.entities.Note
import com.tinmegali.daggerwithkotlin.room.entities.User