Android Material examples implemented with Kotlin

• Kotlin Girls Group version[소녀시대,트와이스]
• DrawerLayout
• NavigationView
• FloatActionButton hide/show
• FABHideWhenScrollingBehavior(app:layout_behavior)
• Glide 4.4.0
• TabLayout
• RecyclerView with SwipeRefreshLayout
• ViewPager
• Collapsing Toolbar
• Circle Image
• Android Transition

Kotlin-Android-Extensions

• build.gradle[Project]

    ext.kotlin_version = '1.2.10'
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.1'
        classpath "org.jetbrains.kotlin:kotlin-gradle- plugin:$kotlin_version"
        classpath "org.jetbrains.kotlin:kotlin-android-extensions:$kotlin_version"
    }

Screenshot

build.gradle[app]

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
apply plugin: 'kotlin-kapt'
, , ,  ,
dependencies {
    compile 'com.android.support:design:27.+'
    compile 'com.android.support:cardview-v7:27.+'

    //Kotlin Glide Setting
    compile 'com.github.bumptech.glide:glide:4.4.0'
    kapt 'com.github.bumptech.glide:compiler:4.4.0'
    compile 'com.github.bumptech.glide:annotations:4.4.0'

    //Circle ImageView
    compile 'de.hdodenhof:circleimageview:2.2.0'
}

Glide 4.4.0

• apply plugin: 'kotlin-kapt' 를 app 레벨에서 추가해 주세요
• Glide Annotation 처리를 위해 [위와 같이 kapt 로 추가해 주세요]
• AndroidManifest.xml에 meta-data Tag를 설정하지 마세요
• 다음을 코딩 후 스튜디오에서 Build/Rebuild Project를 한번 해주세요

@GlideModule
class GirlGroupGlideModule: AppGlideModule(){

   override fun applyOptions(context: Context?, builder: GlideBuilder?){
       super.applyOptions(context, builder)

       val cacheCalculator = MemorySizeCalculator.Builder(context).build()
       val defaultMemoryCacheSize = cacheCalculator.memoryCacheSize
       val defaultBitmapPoolSize = cacheCalculator.bitmapPoolSize

       //Memory 20% 더 사용
       val girlRAMCacheSize = (1.2 * defaultMemoryCacheSize).toLong()
       val girlBitmapPoolSize = (1.2 * defaultBitmapPoolSize).toLong()

       builder?.setMemoryCache(LruResourceCache(girlRAMCacheSize))
       builder?.setBitmapPool(LruBitmapPool(girlBitmapPoolSize))

       /*val diskCacheSize = 1024 * 1024 * 100
       builder?.setDiskCache(InternalCacheDiskCacheFactory(context,                        
                                                          diskCacheSize))

       val downloadDirectoryPath =               
                    Environment.getDownloadCacheDirectory().getPath()
       builder?.setDiskCache(DiskLruCacheFactory(downloadDirectoryPath,                                                              "girlCache", diskCacheSize))*/
   }
}

FABHideWhenScrollingBehavior

/*
 * Created by pyoinsoo on 2018-01-07
 * insoo.pyo@gmail.com
 * RecyclerView Scrolling  FAB hide/show Behavior
 * Float Action Button layout속성에 다음을 추가
 * app:layout_behavior="com.pyoinsoo.kotlin.design.support.FABHideWhenScrollingBehavior"
 */
class FABHideWhenScrollingBehavior: FloatingActionButton.Behavior {

    //constructor() : super()
    constructor(context: Context?, attrs: AttributeSet?) : super(context,                                                                                         attrs)

    /*
     * FloatActionButton의 Dependency View(Current RecyclerView)
     */
    override fun layoutDependsOn(parent: CoordinatorLayout?, child:FloatingActionButton?, dependency: View?)
       = dependency is RecyclerView

    /*
     * FloatActionButton Behavior[스크롤시 보이기/안보이기]
     */
    override fun onNestedScroll(coordinatorLayout: CoordinatorLayout,
                                child: FloatingActionButton,
                                target: View,
                                dxConsumed: Int, dyConsumed: Int,
                                dxUnconsumed: Int, dyUnconsumed: Int, type: Int) {
        //Down Scroll
        if (child.visibility == View.VISIBLE && dyConsumed > 0) {
            //FloatingActionButton.OnVisibilityChangedListener은 SAM이 아니므로
            //object 객체로 만든다
            child.hide(object: FloatingActionButton.OnVisibilityChangedListener(){
                override fun onHidden(fab: FloatingActionButton?) {
                    super.onHidden(fab)
                    fab?.visibility = View.INVISIBLE
                }
            })
        //Up Scrolling
        } else if (child.visibility == View.INVISIBLE && dyConsumed < 0) {
            child.show()
        }
    }

    override fun onStartNestedScroll(coordinatorLayout: CoordinatorLayout,
                                     child: FloatingActionButton,
                                     directTargetChild: View,
                                     target: View, axes: Int, type: Int): Boolean {
        /*
         * Vertical Scrolling Check(수직인지)
         */
        return type == ViewCompat.TYPE_TOUCH && axes == ViewCompat.SCROLL_AXIS_VERTICAL
    }
}