You could use the same approach to listen to any status, but this example includes network connectivity specifics too (ConnectionChangeReceiver and AndroidUtils.isConnected).
Joni Karppinen jonikarppinen
jonikarppinen
/ onlyEvenInt.kt
Last active
July 2, 2024 05:03
onlyEvenInt in Kotlin ("Write a function that takes an array of integers as an input, and returns a new array containing only even integers, sorted.")
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| // Run it at play.kotlinlang.org | |
| fun onlyEvenInt(numbers: List<Int>) = numbers.filter { it % 2 == 0 }.sorted() | |
| fun main() { | |
| println(onlyEvenInt(listOf(1, 2, 3, 4, 5, 6, 7))) | |
| println(onlyEvenInt(listOf(6, 7, 1, 2, 3, 4, 5))) | |
| println(onlyEvenInt(listOf(1, 3, 5, 7))) | |
| println(onlyEvenInt(listOf(-2, -3, -4, 0))) | |
| } |
jonikarppinen
/ kapt-m1-error.txt
Created
January 12, 2022 20:57
kaptGenerateStubsDebugKotlin error output
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| > Task :app:kaptGenerateStubsDebugKotlin FAILED | |
| e: java.lang.IllegalAccessError: class org.jetbrains.kotlin.kapt3.base.KaptContext (in unnamed module @0x6a6abeee) cannot access class com.sun.tools.javac.util.Context (in module jdk.compiler) because module jdk.compiler does not export com.sun.tools.javac.util to unnamed module @0x6a6abeee | |
| at org.jetbrains.kotlin.kapt3.base.KaptContext.<init>(KaptContext.kt:28) | |
| at org.jetbrains.kotlin.kapt3.KaptContextForStubGeneration.<init>(KaptContextForStubGeneration.kt:40) | |
| at org.jetbrains.kotlin.kapt3.AbstractKapt3Extension.contextForStubGeneration(Kapt3Extension.kt:287) | |
| at org.jetbrains.kotlin.kapt3.AbstractKapt3Extension.analysisCompleted(Kapt3Extension.kt:171) | |
| at org.jetbrains.kotlin.kapt3.ClasspathBasedKapt3Extension.analysisCompleted(Kapt3Extension.kt:102) | |
| at org.jetbrains.kotlin.cli.jvm.compiler.TopDownAnalyzerFacadeForJVM.analyzeFilesWithJavaIntegration$invokeExtensionsOnAnalysisComplete(TopDownAnalyzerFacadeForJVM.kt:112) | |
| at org.jetbrains.kotlin.cli.jvm.com |
jonikarppinen
/ play-error-response.html
Last active
September 30, 2016 16:08
HTML error response generated automatically by Play Framework (related to the question http://stackoverflow.com/q/39794500/56285)
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <title>Bad request</title> | |
| <link rel="shortcut icon" href="data:image/png;base64,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 |
jonikarppinen
/ ContactsFragment.java
Last active
February 23, 2020 09:43
Fixes to "Retrieving a List of Contacts" Android tutorial by Google: https://developer.android.com/training/contacts-provider/retrieve-names.html
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| // Fixes to compilation errors in "Define the onItemClick() method" section | |
| // Doesn't compile | |
| Cursor cursor = parent.getAdapter().getCursor(); | |
| // Fixed (not sure if this is the cleanest way though) | |
| Cursor cursor = ((SimpleCursorAdapter) parent.getAdapter()).getCursor(); | |
| // Doesn't compile | |
| mContactId = getLong(CONTACT_ID_INDEX); | |
| // Fixed |
jonikarppinen
/ 1_RxJava-connectivity-status-example.md
Last active
November 23, 2022 18:16
Example of listening to connectivity status in Android and reacting to going offline. (Subscription, Observable, Observer, PublishSubject are from RxJava.)
jonikarppinen
/ Specs2-output.txt
Last active
December 8, 2015 20:34
Specs2 output when run in IntelliJ IDEA: "Test framework quit unexpectedly" (see http://stackoverflow.com/questions/34159857/specs2-how-to-test-a-class-with-more-than-one-injected-dependency)
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| Testing started at 22:28 ... | |
| services.ReportServiceSpec$ | |
| java.lang.ClassNotFoundException: services.ReportServiceSpec$ | |
| STACKTRACE | |
| java.net.URLClassLoader.findClass(URLClassLoader.java:381) | |
| java.lang.ClassLoader.loadClass(ClassLoader.java:424) | |
| sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) |
jonikarppinen
/ Messages.java
Last active
February 23, 2021 23:36
Example of using message resources in Spring Boot service layer code, in as simple way as possible (hopefully!). NOTE: this approach supports only a single locale, not dynamically changing it.
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| package com.company.project.components; | |
| import org.springframework.beans.factory.annotation.Autowired; | |
| import org.springframework.context.MessageSource; | |
| import org.springframework.context.support.MessageSourceAccessor; | |
| import org.springframework.stereotype.Component; | |
| import javax.annotation.PostConstruct; | |
| import java.util.Locale; |
jonikarppinen
/ PdfOrErrorController.java
Last active
November 17, 2021 11:49
Example of using ExceptionHandler in Spring Boot: a controller method that returns either binary data or error JSON
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| package com.company.project.controllers; | |
| import org.springframework.http.HttpHeaders; | |
| import org.springframework.http.HttpStatus; | |
| import org.springframework.http.MediaType; | |
| import org.springframework.http.ResponseEntity; | |
| import org.springframework.web.bind.annotation.*; | |
| import java.util.Random; |
jonikarppinen
/ StringUtils.java
Last active
July 2, 2024 05:30
StringUtils – common utility methods for Java
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| import com.google.common.base.Charsets; | |
| import com.google.common.base.Joiner; | |
| import com.google.common.base.Splitter; | |
| import com.google.common.base.Strings; | |
| import com.google.common.collect.Lists; | |
| import com.google.common.collect.Maps; | |
| import java.io.UnsupportedEncodingException; | |
| import java.net.URLDecoder; | |
| import java.net.URLEncoder; |
jonikarppinen
/ CustomObjectMapper.java
Last active
June 28, 2018 21:28
Example of making Jackson behave more sensibly by default (also, more like Gson)
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| import com.fasterxml.jackson.annotation.JsonInclude; | |
| import com.fasterxml.jackson.databind.DeserializationFeature; | |
| import com.fasterxml.jackson.databind.ObjectMapper; | |
| import com.fasterxml.jackson.databind.SerializationFeature; | |
| /** | |
| * ObjectMapper customised for my tastes and most typical needs | |
| * | |
| * @author Joni Karppinen | |
| */ |
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