├── .gitignore ├── LICENSE ├── README.md ├── app ├── .gitignore ├── build.gradle ├── proguard-rules.pro └── src │ └── main │ ├── AndroidManifest.xml │ ├── kotlin │ └── com │ │ └── hyperaware │ │ └── kotlinviewbuilder │ │ ├── BuildingItemViewFactory.kt │ │ ├── InflatingItemViewFactory.kt │ │ ├── MainActivity.kt │ │ ├── ViewFactory.kt │ │ └── builder │ │ └── Builder.kt │ └── res │ ├── layout │ ├── activity_main.xml │ └── item.xml │ ├── mipmap-hdpi │ └── ic_launcher.png │ ├── mipmap-mdpi │ └── ic_launcher.png │ ├── mipmap-xhdpi │ └── ic_launcher.png │ ├── mipmap-xxhdpi │ └── ic_launcher.png │ ├── mipmap-xxxhdpi │ └── ic_launcher.png │ ├── values-v21 │ └── styles.xml │ ├── values-w820dp │ └── dimens.xml │ └── values │ ├── colors.xml │ ├── dimens.xml │ ├── strings.xml │ └── styles.xml ├── build.gradle ├── gradle.properties ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── gradlew ├── gradlew.bat └── settings.gradle /.gitignore: -------------------------------------------------------------------------------- 1 | *.iml 2 | .gradle 3 | /local.properties 4 | /.idea 5 | .DS_Store 6 | /build 7 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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The blog has seven parts. 5 | 6 | - [part 1](https://medium.com/p/kotlin-android-a-brass-tacks-experiment-part-1-3e5028491bcc) 7 | - [part 2](https://medium.com/p/kotlin-android-a-brass-tacks-experiment-part-2-c67661cfdf5f) 8 | - [part 3](https://medium.com/p/kotlin-android-a-brass-tacks-experiment-part-3-84e65d567a37) 9 | - [part 4](https://medium.com/p/kotlin-android-a-brass-tacks-experiment-part-4-4b7b501fa457) 10 | - [part 5](https://medium.com/p/kotlin-android-a-brass-tacks-experiment-part-5-bd79eb9c85d4) 11 | - [part 6](https://medium.com/p/kotlin-android-a-brass-tacks-experiment-part-6-49fea0ed3a7) 12 | - [part 7](https://medium.com/p/kotlin-android-a-brass-tacks-experiment-wrap-up-2b37e3ac8957) 13 | -------------------------------------------------------------------------------- /app/.gitignore: -------------------------------------------------------------------------------- 1 | /build 2 | -------------------------------------------------------------------------------- /app/build.gradle: -------------------------------------------------------------------------------- 1 | apply plugin: 'com.android.application' 2 | apply plugin: 'kotlin-android' 3 | 4 | android { 5 | compileSdkVersion 23 6 | buildToolsVersion '23.0.2' 7 | 8 | defaultConfig { 9 | applicationId 'com.hyperaware.kotlinviewbuilder' 10 | minSdkVersion 9 11 | targetSdkVersion 23 12 | versionCode 1 13 | versionName '1.0' 14 | } 15 | buildTypes { 16 | debug { 17 | minifyEnabled false 18 | proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 19 | } 20 | } 21 | sourceSets { 22 | main.java.srcDirs += 'src/main/kotlin' 23 | } 24 | } 25 | 26 | dependencies { 27 | compile 'com.android.support:appcompat-v7:23.2.1' 28 | compile 'com.android.support:design:23.2.1' 29 | compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version" 30 | } 31 | -------------------------------------------------------------------------------- /app/proguard-rules.pro: -------------------------------------------------------------------------------- 1 | # Rule to keep kotlin language symbols so they're easier to spot when counting dex methods 2 | -keepnames class kotlin.** {} 3 | -------------------------------------------------------------------------------- /app/src/main/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 2 | 4 | 5 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | -------------------------------------------------------------------------------- /app/src/main/kotlin/com/hyperaware/kotlinviewbuilder/BuildingItemViewFactory.kt: -------------------------------------------------------------------------------- 1 | package com.hyperaware.kotlinviewbuilder 2 | 3 | import android.content.Context 4 | import android.view.Gravity.CENTER_VERTICAL 5 | import android.view.View 6 | import android.view.ViewGroup 7 | import android.widget.LinearLayout 8 | import android.widget.LinearLayout.HORIZONTAL 9 | import android.widget.LinearLayout.VERTICAL 10 | import com.hyperaware.kotlinviewbuilder.builder.* 11 | 12 | class BuildingItemViewFactory(private val context: Context) : ViewFactory { 13 | 14 | override fun newView(): View { 15 | return context.linearLayout { 16 | layoutParams = ViewGroup.LayoutParams(MATCH, WRAP) 17 | orientation = HORIZONTAL 18 | padTop = dp_i(8.0f) 19 | padBottom = dp_i(8.0f) 20 | padLeft = dp_i(16.0f) 21 | padRight = dp_i(16.0f) 22 | 23 | textView { 24 | with(layoutParams as LinearLayout.LayoutParams) { 25 | width = WRAP 26 | height = WRAP 27 | rightMargin = dp_i(16f) 28 | marginEnd = rightMargin 29 | gravity = CENTER_VERTICAL 30 | } 31 | textSize = 24f 32 | textRes = R.string.time 33 | } 34 | 35 | linearLayout { 36 | with(layoutParams as LinearLayout.LayoutParams) { 37 | width = 0 38 | height = WRAP 39 | weight = 1f 40 | gravity = CENTER_VERTICAL 41 | } 42 | orientation = VERTICAL 43 | 44 | textView { 45 | textRes = R.string.day 46 | } 47 | 48 | textView { 49 | textRes = R.string.location 50 | } 51 | } 52 | } 53 | } 54 | 55 | } 56 | -------------------------------------------------------------------------------- /app/src/main/kotlin/com/hyperaware/kotlinviewbuilder/InflatingItemViewFactory.kt: -------------------------------------------------------------------------------- 1 | package com.hyperaware.kotlinviewbuilder 2 | 3 | import android.view.LayoutInflater 4 | import android.view.View 5 | import android.view.ViewGroup 6 | 7 | class InflatingItemViewFactory( 8 | private val inflater: LayoutInflater, 9 | private val resource: Int, 10 | private val root: ViewGroup? 11 | ) : ViewFactory { 12 | 13 | override fun newView(): View { 14 | return inflater.inflate(resource, root) 15 | } 16 | 17 | } 18 | -------------------------------------------------------------------------------- /app/src/main/kotlin/com/hyperaware/kotlinviewbuilder/MainActivity.kt: -------------------------------------------------------------------------------- 1 | package com.hyperaware.kotlinviewbuilder 2 | 3 | import android.os.Bundle 4 | import android.support.v7.app.AppCompatActivity 5 | import android.util.Log 6 | import android.view.ViewGroup 7 | import android.widget.FrameLayout 8 | import android.widget.TextView 9 | import java.util.concurrent.TimeUnit 10 | 11 | class MainActivity : AppCompatActivity() { 12 | 13 | private lateinit var inflatingItemViewFactory: ViewFactory 14 | private lateinit var buildingItemViewFactory: ViewFactory 15 | 16 | override fun onCreate(savedInstanceState: Bundle?) { 17 | super.onCreate(savedInstanceState) 18 | setContentView(R.layout.activity_main) 19 | 20 | inflatingItemViewFactory = InflatingItemViewFactory(layoutInflater, R.layout.item, null) 21 | (findViewById(R.id.inflated) as FrameLayout).addView(inflatingItemViewFactory.newView()) 22 | 23 | buildingItemViewFactory = BuildingItemViewFactory(this) 24 | (findViewById(R.id.built) as FrameLayout).addView(buildingItemViewFactory.newView()) 25 | 26 | findViewById(R.id.bench_inflate)!!.setOnClickListener { 27 | val tv = (findViewById(R.id.inflate_time) as TextView)//.text = "" + inflate_ms + "ms" 28 | 29 | Thread({ 30 | runOnUiThread({ 31 | tv.text = "Running..." 32 | }) 33 | 34 | Runtime.getRuntime().gc() 35 | Thread.sleep(1000) 36 | val inflate_ms = TimeUnit.NANOSECONDS.toMillis(bench(inflatingItemViewFactory)) 37 | 38 | runOnUiThread({ 39 | tv.text = "1000x in " + inflate_ms + "ms" 40 | }) 41 | }).start() 42 | } 43 | 44 | findViewById(R.id.bench_build)!!.setOnClickListener { 45 | val tv = (findViewById(R.id.build_time) as TextView) 46 | 47 | Thread({ 48 | runOnUiThread({ 49 | tv.text = "Running..." 50 | }) 51 | 52 | Runtime.getRuntime().gc() 53 | Thread.sleep(1000) 54 | val inflate_ms = TimeUnit.NANOSECONDS.toMillis(bench(buildingItemViewFactory)) 55 | 56 | runOnUiThread({ 57 | tv.text = "1000x in " + inflate_ms + "ms" 58 | }) 59 | }).start() 60 | } 61 | } 62 | 63 | private fun bench(factory: ViewFactory): Long { 64 | val start = System.nanoTime() 65 | for (i in 0..999) { 66 | factory.newView() 67 | } 68 | val end = System.nanoTime() 69 | return end - start; 70 | } 71 | } 72 | 73 | -------------------------------------------------------------------------------- /app/src/main/kotlin/com/hyperaware/kotlinviewbuilder/ViewFactory.kt: -------------------------------------------------------------------------------- 1 | package com.hyperaware.kotlinviewbuilder 2 | 3 | import android.view.View 4 | 5 | interface ViewFactory { 6 | fun newView(): View 7 | } 8 | -------------------------------------------------------------------------------- /app/src/main/kotlin/com/hyperaware/kotlinviewbuilder/builder/Builder.kt: -------------------------------------------------------------------------------- 1 | package com.hyperaware.kotlinviewbuilder.builder 2 | 3 | import android.content.Context 4 | import android.util.TypedValue 5 | import android.view.View 6 | import android.view.ViewGroup 7 | import android.view.ViewGroup.LayoutParams.MATCH_PARENT 8 | import android.view.ViewGroup.LayoutParams.WRAP_CONTENT 9 | import android.widget.Button 10 | import android.widget.LinearLayout 11 | import android.widget.TextView 12 | import java.lang.reflect.Constructor 13 | 14 | const val WRAP = WRAP_CONTENT 15 | const val MATCH = MATCH_PARENT 16 | 17 | /** 18 | * Constructs a view of the given generic type with this Context. 19 | */ 20 | inline fun Context.v(init: TV.() -> Unit) : TV { 21 | val v = ConstructorCache.get(TV::class.java).newInstance(this) 22 | v.init() 23 | return v 24 | } 25 | 26 | /** 27 | * Constructs a view of the given generic type and adds it as a 28 | * child to this ViewGroup. 29 | */ 30 | inline fun ViewGroup.v(init: TV.() -> Unit) : TV { 31 | val av = ConstructorCache.get(TV::class.java).newInstance(context) 32 | addView(av) 33 | av.init() 34 | return av 35 | } 36 | 37 | 38 | /** 39 | * Converts dp to pixels as float. 40 | */ 41 | fun View.dp_f(dp: Float) : Float { 42 | return TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp, context.resources.displayMetrics) 43 | } 44 | 45 | /** 46 | * Converts dp to pixels as int. 47 | */ 48 | fun View.dp_i(dp: Float) : Int { 49 | return dp_f(dp).toInt() 50 | } 51 | 52 | 53 | /** 54 | * Property for this View's left padding. 55 | */ 56 | var View.padLeft: Int 57 | set(value) { 58 | setPadding(value, paddingTop, paddingRight, paddingBottom) 59 | } 60 | get() { 61 | return paddingLeft 62 | } 63 | 64 | /** 65 | * Property for this View's top padding. 66 | */ 67 | var View.padTop: Int 68 | set(value) { 69 | setPadding(paddingLeft, value, paddingRight, paddingBottom) 70 | } 71 | get() { 72 | return paddingTop 73 | } 74 | 75 | /** 76 | * Property for this View's right padding. 77 | */ 78 | var View.padRight: Int 79 | set(value) { 80 | setPadding(paddingLeft, paddingTop, value, paddingBottom) 81 | } 82 | get() { 83 | return paddingRight 84 | } 85 | 86 | /** 87 | * Property for this View's bottom padding. 88 | */ 89 | var View.padBottom: Int 90 | set(value) { 91 | setPadding(paddingLeft, paddingTop, paddingRight, value) 92 | } 93 | get() { 94 | return paddingBottom 95 | } 96 | 97 | var TextView.textRes: Int 98 | set(value) = setText(value) 99 | get() = 0 100 | 101 | /** Alias for Context.v. */ 102 | fun Context.linearLayout(init: LinearLayout.() -> Unit) = v(init) 103 | /** Alias for ViewGroup.v. */ 104 | fun ViewGroup.linearLayout(init: LinearLayout.() -> Unit) = v(init) 105 | 106 | /** Alias for Context.v. */ 107 | fun Context.textView(init: TextView.() -> Unit) = v(init) 108 | /** Alias for ViewGroup.v. */ 109 | fun ViewGroup.textView(init: TextView.() -> Unit) = v(init) 110 | 111 | fun Context.Button(init: TextView.() -> Unit) = v(init) 112 | fun ViewGroup.button(init: Button.() -> Unit) = v(init) 113 | 114 | 115 | /** 116 | * Used to cache view constructors obtained by reflection to avoid doing 117 | * the reflection every time a new view is created. 118 | */ 119 | object ConstructorCache { 120 | private val cache = hashMapOf, Constructor<*>>() 121 | fun get(clazz: Class): Constructor { 122 | var constructor = cache[clazz] 123 | if (constructor == null) { 124 | constructor = clazz.getConstructor(Context::class.java) 125 | cache.put(clazz, constructor) 126 | } 127 | @Suppress("UNCHECKED_CAST") 128 | return constructor as Constructor 129 | } 130 | } 131 | -------------------------------------------------------------------------------- /app/src/main/res/layout/activity_main.xml: -------------------------------------------------------------------------------- 1 | 2 | 14 | 15 | 20 | 21 | 27 | 28 | 33 | 38 | 39 | 40 | 41 | 48 | 49 | 54 | 59 | 60 | 61 | 62 | 67 |