jmfayard

Mercari-Jmfayard

Originally published on https://github.com/m-rec/c325017f9e66db9320f99fdced6ac3d66abc9212

jmfayard

Coroutines documents

• Getting started guide
  • Channels
  • Courintes context and Dispatchers
  • Shared mutable state and concurrency
• The Kotlin Playground allows to try out things
• The kotlinx.coroutines guide is the (huge!) reference
• Everything from Roman Elizarov including
• Structured concurrency

jmfayard

# Open a new android project in Android Studio
# From Android Studio, run the gradle task ":properties"

# From the command-line, run
$ ./gradlew :properties
# Check if you see this message
Starting a Gradle Daemon, 1 incompatible could not be reused

# To debug the problem run this
$ ps auxw  | grep GradleDaemon

jmfayard

// buildSrc/src/main/kotlin/Config.kt
object Config {
    const val ACTIVITY = "com.mautinoa.cardapp.MainActivity"
    const val PACKAGE = "com.mautinoa.cardapp"
    const val kotlinVersion = "1.2.71"

    object SdkVersions {
        val versionCode = 1
        val compile = 28
        val target = 26

jmfayard

// buildSrc/src/main/java/GooglePlay.kt
import java.io.File

object GooglePlay {


    @JvmStatic
    fun updateWhatsNew(projectDir: File, version: String) {
        val files: List<File> = listOf(
                "src/production/play/en-US/listing/whatsnew-alpha",

jmfayard

fun app() = AppComponent.instance

interface AppComponent {
    val context: Context
    val retrofit: Retrofit
    val okHttpClient: OkHttpClient
    val catRepository: CatRepository
    val catService: CatService

    val mainThreadScheduler: Scheduler

jmfayard

data class Producer<out T : Beverage>(
    val beverage: T
) {
    fun produce() : T = beverage
}

class Consumer<in T: Beverage> {
    fun consume(t: T) = println("Thanks for the drink $t!")
}

jmfayard

// https://medium.com/@garnop/safe-concise-text-parsing-with-regex-destructuring-in-kotlin-b8f77ef1e30c

fun parsePhoneNumber(input: String): PhoneNumber {
    val invalids = input.filterNot { it in '0'..'9' || it == '-' }
    require(invalids.isEmpty()) { "Input $input has invalid characters : $invalids" }
    val (areaCode, prefix, lineNumber) = input.split("-").map(String::toInt)
	return PhoneNumber(areaCode, prefix, lineNumber)
}

fun main(args: Array<String>) {

jmfayard

lolcat() {
   FILE="$HOME/.config/androidpackage.txt"
   echo "Reading ${FILE}"
   export PACKAGE=$( cat ${FILE}  )
   adb devices
   echo pidcat $1 $2 $PACKAGE
   sleep 2
   pidcat $1 $2 $PACKAGE
}

jmfayard

Add the printProperties task to your build.gradle

Run from both the command-line and intellij the gradle task printProperties

> Task :printProperties
Detecting what could cause incompatible gradle daemons
Run './gradlew printProperties' from the command-line and the same task Android studio
See https://docs.gradle.org/4.5/userguide/build_environment.html
See https://docs.gradle.org/4.5/userguide/gradle_daemon.html#daemon_faq