My adventures in code & business
In Part 1 we dealt with the simplest form of initialization with the primary constructor:
class Planet(
val diameter: Int,
val distanceToSun: Double,
val mass: Double
)
But wait: there is more: Continue reading “Classes in Kotlin – Part 2”
Why is there a car in the picture? – Because it has class!
Jokes aside, classes are still the building blocks of modern object oriented software design. And of course as the new kid on the block Kotlin has it’s own take on this subject. Continue reading “Classes in Kotlin – Part 1”
1901 Annie Jump Cannon constructed this classification:
| Class | Temperature in K | Color |
|---|---|---|
| O | >= 30000 | blue |
| B | 10000 – 30000 | blue white |
| A | 7500 -10000 | white |
| F | 6000 – 7500 | yellow white |
| G | 5200 – 6000 | yellow |
| K | 3700 – 5200 | light orange |
| M | 2400 – 3700 | orange red |
Mnemoic: Oh, Be A Fine Galaxy, Kiss Me
The version of the YouTube API service installed on this device is not valid.
-> Install YouTube app 🙂
Add the following to your dependencies
implementation("org.jetbrains.kotlinx:kotlinx-datetime:0.2.0")
The easiest way to add external dependencies with local jar files to your gradle is:
dependencies {
implementation(files("libs/YouTubeAndroidPlayerApi.jar"))
If you don’t want to add every lib individually you can use:
dependencies {
implementation fileTree('libs')
Kotlin has its own keyword to create list which are mutable
As a child I learned that our solar system has nine planets
val planets = mutableListOf("Mercury", "Venus", "Earth", "Mars", "Jupiter", "Saturn", "Uranus", "Neptune", "Pluto")
println(planets)
In 2006 Pluto was reclassified as a dwarf planet. So let’s remove Pluto
planets.remove("Pluto")
println(planets)
tl;dr; Length, time and mass Continue reading “What are the fundamental quantities?”
Consider Volley a 2.0 version of Android Asynchronous Http Client.
A major advantage of Volley over ASyncTask is that you can do multiple requests simultaneously without the overhead of thread management.
Add
implementation 'com.android.volley:volley:1.2.1'
to your module gradle dependencies.
val queue = Volley.newRequestQueue(context)
val stringRequest = StringRequest(
Request.Method.GET, url,
{ response ->
Log.e(TAG, "success")
},
{
Log.e(TAG, "error")
})
queue.add(stringRequest)