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Add Android data binding sample
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‎gradle/android-databinding/.gitignore‎

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*.iml
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.gradle
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/local.properties
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/.idea/workspace.xml
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/.idea/libraries
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.DS_Store
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/build
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/captures
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.externalNativeBuild

‎gradle/android-databinding/app/.gitignore‎

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/build

‎gradle/android-databinding/app/build.gradle‎

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apply plugin: 'com.android.application'
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apply plugin: 'kotlin-android'
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apply plugin: 'kotlin-kapt'
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android {
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compileSdkVersion 25
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buildToolsVersion "25.0.3"
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defaultConfig {
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applicationId "org.example.kotlin.databinding"
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minSdkVersion 18
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targetSdkVersion 25
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versionCode 1
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versionName "1.0"
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testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
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}
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buildTypes {
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release {
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minifyEnabled false
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proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
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}
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}
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dataBinding {
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enabled = true
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}
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}
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dependencies {
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compile fileTree(dir: 'libs', include: ['*.jar'])
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androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
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exclude group: 'com.android.support', module: 'support-annotations'
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})
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compile 'com.android.support:appcompat-v7:25.3.1'
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testCompile 'junit:junit:4.12'
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compile 'com.android.support.constraint:constraint-layout:1.0.1'
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compile "com.android.support:recyclerview-v7:25.3.1"
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kapt "com.android.databinding:compiler:$android_plugin_version"
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compile "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
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compile 'com.github.bumptech.glide:glide:3.7.0'
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}
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repositories {
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mavenCentral()
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}

‎gradle/android-databinding/app/proguard-rules.pro‎

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# Add project specific ProGuard rules here.
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# By default, the flags in this file are appended to flags specified
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# in /Users/4u7/Library/Android/sdk/tools/proguard/proguard-android.txt
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# You can edit the include path and order by changing the proguardFiles
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# directive in build.gradle.
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#
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# For more details, see
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# http://developer.android.com/guide/developing/tools/proguard.html
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# Add any project specific keep options here:
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# If your project uses WebView with JS, uncomment the following
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# and specify the fully qualified class name to the JavaScript interface
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# class:
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#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
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# public *;
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#}
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# Uncomment this to preserve the line number information for
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# debugging stack traces.
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#-keepattributes SourceFile,LineNumberTable
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# If you keep the line number information, uncomment this to
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# hide the original source file name.
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#-renamesourcefileattribute SourceFile

‎gradle/android-databinding/app/src/androidTest/java/org/example/kotlin/databinding/ExampleInstrumentedTest.java‎

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package org.example.kotlin.databinding;
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import android.content.Context;
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import android.support.test.InstrumentationRegistry;
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import android.support.test.runner.AndroidJUnit4;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import static org.junit.Assert.*;
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/**
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* Instrumentation test, which will execute on an Android device.
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*
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* @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
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*/
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@RunWith(AndroidJUnit4.class)
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public class ExampleInstrumentedTest {
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@Test
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public void useAppContext() throws Exception {
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// Context of the app under test.
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Context appContext = InstrumentationRegistry.getTargetContext();
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assertEquals("org.example.kotlin.databinding", appContext.getPackageName());
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}
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}

‎gradle/android-databinding/app/src/main/AndroidManifest.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
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package="org.example.kotlin.databinding">
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<uses-permission android:name="android.permission.INTERNET" />
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<application
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android:allowBackup="true"
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android:icon="@mipmap/ic_launcher"
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android:label="@string/app_name"
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android:roundIcon="@mipmap/ic_launcher_round"
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android:supportsRtl="true"
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android:theme="@style/AppTheme">
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<activity android:name="org.example.kotlin.databinding.MainActivity">
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<intent-filter>
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<action android:name="android.intent.action.MAIN" />
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<category android:name="android.intent.category.LAUNCHER" />
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</intent-filter>
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</activity>
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<activity android:name="org.example.kotlin.databinding.SecondActivity" />
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</application>
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</manifest>

‎gradle/android-databinding/app/src/main/java/org/example/kotlin/databinding/ImageBindingAdapter.kt‎

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package org.example.kotlin.databinding
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import android.databinding.BindingAdapter
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import android.widget.ImageView
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import com.bumptech.glide.Glide
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object ImageBindingAdapter {
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@JvmStatic
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@BindingAdapter("android:src")
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fun setImageUrl(view: ImageView, url: String) {
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Glide.with(view.context).load(url).into(view)
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}
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}

‎gradle/android-databinding/app/src/main/java/org/example/kotlin/databinding/MainActivity.kt‎

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package org.example.kotlin.databinding
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import android.content.Intent
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import android.databinding.DataBindingUtil
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import android.os.Bundle
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import android.support.v7.app.AppCompatActivity
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import android.view.View
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import org.example.kotlin.databinding.databinding.ActivityMainBinding
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class MainActivity : AppCompatActivity() {
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val weather = WeatherData(
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"Saint Petersburg",
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"10 °C",
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"Cloudy with rain and possible thunderstorms",
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"http://loremflickr.com/800/600/city")
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var counter = 1
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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val binding: ActivityMainBinding =
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DataBindingUtil.setContentView(this, R.layout.activity_main)
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binding.data = weather
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}
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fun change(view: View) {
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++counter
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weather.temperature = "$counter °C"
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weather.imageUrl = "http://loremflickr.com/800/600/city?random=$counter"
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weather.notifyChange()
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}
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fun startActivity(view: View) {
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startActivity(Intent(this, SecondActivity::class.java))
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}
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}

‎gradle/android-databinding/app/src/main/java/org/example/kotlin/databinding/SecondActivity.kt‎

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package org.example.kotlin.databinding
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import android.databinding.ViewDataBinding
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import android.support.v7.app.AppCompatActivity
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import android.os.Bundle
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import android.support.v7.widget.LinearLayoutManager
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import android.support.v7.widget.RecyclerView
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import android.view.ViewGroup
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import android.view.LayoutInflater
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import android.databinding.DataBindingUtil
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class SecondActivity : AppCompatActivity() {
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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setContentView(R.layout.activity_second)
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val items = listOf(
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WeatherData(
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"Saint Petersburg",
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"10 °C",
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"Cloudy with rain and possible thunderstorms",
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"http://loremflickr.com/800/600/city?random=2"),
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WeatherData(
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"Munich",
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"23 °C",
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"Partly sunny and delightful",
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"http://loremflickr.com/800/600/city?random=3"),
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WeatherData(
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"Novosibirsk",
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"9 °C",
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"Mostly cloudy",
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"http://loremflickr.com/800/600/city?random=4"))
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val recyclerView = findViewById(R.id.weather_list) as RecyclerView
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recyclerView.layoutManager = LinearLayoutManager(this)
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recyclerView.adapter = WeatherAdapter(items)
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}
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class WeatherAdapter(val data: List<WeatherData>): RecyclerView.Adapter<WeatherViewHolder>() {
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override fun onBindViewHolder(holder: WeatherViewHolder, position: Int) {
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holder.bind(data[position])
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}
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override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): WeatherViewHolder {
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val layoutInflater = LayoutInflater.from(parent.context)
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val binding: ViewDataBinding =
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DataBindingUtil.inflate(layoutInflater, R.layout.weather_row, parent, false)
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return WeatherViewHolder(binding)
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}
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override fun getItemCount(): Int = data.size
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}
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class WeatherViewHolder(val binding: ViewDataBinding) : RecyclerView.ViewHolder(binding.root) {
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fun bind(data: Any) {
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binding.setVariable(BR.data, data)
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binding.executePendingBindings()
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}
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}
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}

‎gradle/android-databinding/app/src/main/java/org/example/kotlin/databinding/WeatherData.kt‎

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package org.example.kotlin.databinding
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import android.databinding.BaseObservable
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class WeatherData(
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var location: String,
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var temperature: String,
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var info: String,
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var imageUrl: String
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) : BaseObservable()

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