Skip to main content

Kotlin + Binding library setup in Android Studio

Envrionment
Java 8
Android Studio 2.3.1
gradle 2.3.1
kotlin 1.1.1
DataBinding 2.0

Installing the Kotlin plugin

https://blog.jetbrains.com/kotlin/2013/08/working-with-kotlin-in-android-studio/ After installation, restart Android Studio.

Setting your project

Create src/main/kotlin folder for kotlin source code. Setup project/build.gradle, project/app/build.gradle project/build.gradle 
 
buildscript {
    ext.kotlin_version = '1.1.1'
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.3.1'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath "org.jetbrains.kotlin:kotlin-android-extensions:$kotlin_version"

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}
And you need some configurations in /app/build.gradle as well. project/app/build.gradle 
 
apply plugin: 'com.android.application'
apply plugin: 'kotlin-kapt'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'

android {
    compileSdkVersion 25
    buildToolsVersion "25.0.1"
    defaultConfig {
        applicationId "com.example.kotlin"
        minSdkVersion 15
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    dataBinding {
        enabled = true
        version = "2.0.0"
    }
    kapt {
        generateStubs = true
    }
}

dependencies {
    kapt 'com.android.databinding:compiler:2.3.0'
    compile fileTree(dir: 'libs', include: ['*.jar'])
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    compile 'com.android.support:appcompat-v7:25.3.1'
    compile 'com.android.support:design:25.3.1'
    testCompile 'junit:junit:4.12'
    compile "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"

}
repositories {
    mavenCentral()
}

Comments

Post a Comment

Popular posts from this blog

How to test AsyncTask in Android

In Android, test is not as easy as any other platform. Because Android test cannot be run without emulator. Particulary when it comes to AsyncTask or Service, it is difficult to test because they are different type of thread and hard to check their result. Then, how can we ensure the result of AsyncTask valid? AsyncTask is a thread and an asynchnorous as the name means. So, we need to wait for it finishes its job and need to capture the event. Then, when it happens in AsyncTask. It can be one of onBackground() and onPostExecute() methods. It doesn't matter you use onBackground() or onPostExecute() but I prefer onPostExecute(). Anyway, we can test an AsyncTask if we can hook it. Then, how can we hook it? For that, we can use callback pattern. But we need to delay main thread to wait for the AsyncTask's job done because we want to check the result. So the structure for the test would be like: 1. Create AsyncTask A 2. Injection a callback into A 3. Wait until A finish 4....
8 comments
Read more

Apply Kotlin DataBinding to Android Studio Generated Main Activity

I posted how to setup Kotlin and DataBinding in Android Stuido in the last blog (http://marksunghunpark.blogspot.com.au/2017/04/kotlin-binding-library-setup-in-android.html). In this post, I am going to how to use DataBiding in the MainActivity when you create a navigation drawer project from Android Studio templates. Layouts You will have four layouts in app/src/res/layout folder: app/src/main/res/layout/activity_main.xml app/src/main/res/layout/app_bar_main.xml app/src/main/res/layout/content_main.xml app/src/main/res/layout/nav_header_main.xml And activity_main.xml contains all other layout using include layout. You need to have tag in activity_main.xml , app_bar_main.xml and content_main.xml . If you don't have the tag, Binding library cannot recognise the sub layouts properly. Binding library doesn't support toolbar and navigation drawer yet, so you can use using BindingAdapter if you want to use binding library.(But I'm gong to skip this part for simplici...
Post a Comment
Read more

Fragment LifeCycle

Normal setRetainInstance(true) Description onAttach onAttach Called once the fragment is associated with its activity. onCreate - Called to do initial creation of the fragment. onCreateView onCreateView Creates and returns the view hierarchy associated with the fragment. onActivityCreated onActivityCreated Tells the fragment that its activity has completed its own Activity.onCreate(). onViewStateRestored onViewStateRestored Tells the fragment that all of the saved state of its view hierarchy has been restored. onStart onStart Makes the fragment visible to the user (based on its containing activity being started). onResume onResume Makes the fragment begin interacting with the user (based on its containing activity being resumed). As a fragment is no longer being used, it goes through a reverse series...
Post a Comment
Read more