serhii-pokrovskyi

fun <T> LifecycleOwner.onDestroyNullable(): ReadWriteProperty<LifecycleOwner, T> =
    object : ReadWriteProperty<LifecycleOwner, T>, DefaultLifecycleObserver {

        private var value: T? = null

        init {
            this@onDestroyNullable
                .lifecycle
                .addObserver(this)
        }

rishabhkohli

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

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

		private var value: T? = null

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 {

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:

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;
}

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

bellebethcooper

Morning routine template

Part 1: Wake up

Remember not to snooze, get some natural light on your face, and turn on as many lights as you can to signal to your body that it’s time to be awake. If you don’t shower immediately, try washing your face right after getting up to help your eyes feel more awake, too.

• 1.
• 2.
• 3.

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

dominicthomas

public class MaxHeightLinearLayout extends LinearLayout {

    private int maxHeightDp;

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

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

segunfamisa

// app module build.gradle
apply plugin: 'com.android.application'

android {
    compileSdkVersion rootProject.compileSdkVersion
    buildToolsVersion rootProject.buildToolsVersion
    defaultConfig {
        applicationId "com.segunfamisa.gradleextraproperties"
        minSdkVersion rootProject.minSdkVersion
        targetSdkVersion rootProject.targetSdkVersion