Move components to separate modules

17 files changed, 844 insertions, 0 deletions

diff --git a/about/.gitignore b/about/.gitignore
new file mode 100644
index 0000000..796b96d
--- /dev/null
+++ b/about/.gitignore
@@ -0,0 +1 @@
+/build
diff --git a/about/build.gradle b/about/build.gradle
new file mode 100644
index 0000000..5598429
--- /dev/null
+++ b/about/build.gradle
@@ -0,0 +1,63 @@
+plugins {
+    id 'com.gladed.androidgitversion' version '0.3.4'
+}
+
+apply plugin: 'com.android.library'
+apply plugin: 'kotlin-android'
+apply plugin: 'com.github.dcendents.android-maven'
+
+group = project.APP_GROUP
+
+android {
+    compileSdkVersion Integer.parseInt(project.TARGET_SDK)
+    buildToolsVersion project.BUILD_TOOLS
+
+    androidGitVersion {
+        codeFormat = 'MMNNPPBB'
+        prefix 'v'
+    }
+
+    defaultConfig {
+        minSdkVersion Integer.parseInt(project.MIN_SDK)
+        targetSdkVersion Integer.parseInt(project.TARGET_SDK)
+        versionCode androidGitVersion.code()
+        versionName androidGitVersion.name()
+        consumerProguardFiles 'progress-proguard.txt'
+        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+    lintOptions {
+        abortOnError false
+        checkReleaseBuilds false
+    }
+    resourcePrefix "kau_"
+    sourceSets {
+        main.java.srcDirs += 'src/main/kotlin'
+        test.java.srcDirs += 'src/test/kotlin'
+    }
+}
+
+dependencies {
+    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'
+    })
+    testCompile 'junit:junit:4.12'
+
+    compile project(':core-ui')
+    compile project(':adapter')
+
+    compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+    testCompile "org.jetbrains.kotlin:kotlin-test-junit:$kotlin_version"
+
+    compile("com.mikepenz:aboutlibraries:${ABOUT_LIBRARIES}@aar") {
+        transitive = true
+    }
+}
+
+apply from: '../artifacts.gradle'
diff --git a/about/progress-proguard.txt b/about/progress-proguard.txt
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/about/progress-proguard.txt
@@ -0,0 +1 @@
+
diff --git a/about/src/androidTest/java/ca/allanwang/kau/ExampleInstrumentedTest.java b/about/src/androidTest/java/ca/allanwang/kau/ExampleInstrumentedTest.java
new file mode 100644
index 0000000..7b079b2
--- /dev/null
+++ b/about/src/androidTest/java/ca/allanwang/kau/ExampleInstrumentedTest.java
@@ -0,0 +1,26 @@
+package ca.allanwang.kau;
+
+import android.content.Context;
+import android.support.test.InstrumentationRegistry;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumentation test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() throws Exception {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getTargetContext();
+
+        assertEquals("ca.allanwang.kau.test", appContext.getPackageName());
+    }
+}
diff --git a/about/src/main/AndroidManifest.xml b/about/src/main/AndroidManifest.xml
new file mode 100644
index 0000000..9c9b9e6
--- /dev/null
+++ b/about/src/main/AndroidManifest.xml
@@ -0,0 +1 @@
+<manifest package="ca.allanwang.kau.about" />
diff --git a/about/src/main/kotlin/ca/allanwang/kau/about/AboutActivityBase.kt b/about/src/main/kotlin/ca/allanwang/kau/about/AboutActivityBase.kt
new file mode 100644
index 0000000..4751a09
--- /dev/null
+++ b/about/src/main/kotlin/ca/allanwang/kau/about/AboutActivityBase.kt
@@ -0,0 +1,248 @@
+package ca.allanwang.kau.about
+
+import android.graphics.drawable.Drawable
+import android.os.Bundle
+import android.support.v4.view.PagerAdapter
+import android.support.v4.view.ViewPager
+import android.support.v7.app.AppCompatActivity
+import android.support.v7.widget.RecyclerView
+import android.transition.TransitionInflater
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import ca.allanwang.kau.R
+import ca.allanwang.kau.adapters.FastItemThemedAdapter
+import ca.allanwang.kau.adapters.ThemableIItemColors
+import ca.allanwang.kau.adapters.ThemableIItemColorsDelegate
+import ca.allanwang.kau.animators.FadeScaleAnimator
+import ca.allanwang.kau.iitems.CutoutIItem
+import ca.allanwang.kau.iitems.HeaderIItem
+import ca.allanwang.kau.iitems.LibraryIItem
+import ca.allanwang.kau.utils.*
+import ca.allanwang.kau.ui.widgets.ElasticDragDismissFrameLayout
+import ca.allanwang.kau.ui.widgets.InkPageIndicator
+import com.mikepenz.aboutlibraries.Libs
+import com.mikepenz.aboutlibraries.entity.Library
+import com.mikepenz.fastadapter.IItem
+import org.jetbrains.anko.doAsync
+import org.jetbrains.anko.uiThread
+import java.security.InvalidParameterException
+
+/**
+ * Created by Allan Wang on 2017-06-28.
+ *
+ * Floating About Activity Panel for your app
+ * This contains all the necessary layouts, and can be extended and configured using the [configBuilder]
+ * The [rClass] is necessary to generate the list of libraries used in your app, and should point to your app's
+ * R.string::class.java
+ * If you don't need auto detect, you can pass null instead
+ * Note that for the auto detection to work, the R fields must be excluded from Proguard
+ * Manual lib listings and other extra modifications can be done so by overriding the open functions
+ */
+abstract class AboutActivityBase(val rClass: Class<*>?, val configBuilder: Configs.() -> Unit = {}) : AppCompatActivity(), ViewPager.OnPageChangeListener {
+
+    val draggableFrame: ElasticDragDismissFrameLayout by bindView(R.id.about_draggable_frame)
+    val pager: ViewPager by bindView(R.id.about_pager)
+    val indicator: InkPageIndicator by bindView(R.id.about_indicator)
+    /**
+     * Holds some common configurations that may be added directly from the constructor
+     * Applied lazily since it needs the context to fetch resources
+     */
+    val configs: Configs by lazy { Configs().apply { configBuilder() } }
+    /**
+     * Number of pages in the adapter
+     * Defaults to just the main view and lib view
+     */
+    open val pageCount: Int = 2
+    /**
+     * Page position for the libs
+     * This is generated automatically if [inflateLibPage] is called
+     */
+    private var libPage: Int = -2
+    /**
+     * Holds that status of each page
+     * 0 means nothing has happened
+     * 1 means this page has been in view at least once
+     * The rest is up to you
+     */
+    lateinit var pageStatus: IntArray
+    /**
+     * Holds the lib items once they are fetched asynchronously
+     */
+    var libItems: List<LibraryIItem>? = null
+    /**
+     * Holds the adapter for the library page; this is generated later because it uses the config colors
+     */
+    lateinit var libAdapter: FastItemThemedAdapter<IItem<*, *>>
+    /**
+     * Global reference of the library recycler
+     * This is set by default through [inflateLibPage] and is used to stop scrolling
+     * When the draggable frame exits
+     * It is not required, hence its nullability
+     */
+    private var libRecycler: RecyclerView? = null
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.kau_activity_about)
+        pageStatus = IntArray(pageCount)
+        libAdapter = FastItemThemedAdapter(configs)
+        LibraryIItem.bindClickEvents(libAdapter)
+        if (configs.textColor != null) indicator.setColour(configs.textColor!!)
+        with(pager) {
+            adapter = AboutPagerAdapter()
+            pageMargin = dimenPixelSize(R.dimen.kau_spacing_normal)
+            addOnPageChangeListener(this@AboutActivityBase)
+        }
+        indicator.setViewPager(pager)
+        draggableFrame.addListener(object : ElasticDragDismissFrameLayout.SystemChromeFader(this) {
+            override fun onDragDismissed() {
+                // if we drag dismiss downward then the default reversal of the enter
+                // transition would slide content upward which looks weird. So reverse it.
+                if (draggableFrame.translationY > 0) {
+                    window.returnTransition = TransitionInflater.from(this@AboutActivityBase)
+                            .inflateTransition(configs.transitionExitReversed)
+                }
+                libRecycler?.stopScroll()
+                finishAfterTransition()
+            }
+        })
+    }
+
+    inner class Configs : ThemableIItemColors by ThemableIItemColorsDelegate() {
+        var cutoutTextRes: Int = -1
+        var cutoutText: String? = null
+        var cutoutDrawableRes: Int = -1
+        var cutoutDrawable: Drawable? = null
+        var cutoutForeground: Int? = null
+        var libPageTitleRes: Int = -1
+        var libPageTitle: String? = string(R.string.kau_about_libraries_intro) //This is in the string by default since it's lower priority
+        /**
+         * Transition to be called if the view is dragged down
+         */
+        var transitionExitReversed: Int = R.transition.kau_about_return_downward
+    }
+
+    /**
+     * Method to fetch the library list
+     * This is fetched asynchronously and you may override it to customize the list
+     */
+    open fun getLibraries(libs: Libs): List<Library> = libs.prepareLibraries(this, null, null, true, true)
+
+    /**
+     * Gets the view associated with the given page position
+     * Keep in mind that when inflating, do NOT add the view to the viewgroup
+     * Use layoutInflater.inflate(id, parent, false)
+     */
+    open fun getPage(position: Int, layoutInflater: LayoutInflater, parent: ViewGroup): View {
+        return when (position) {
+            0 -> inflateMainPage(layoutInflater, parent, position)
+            pageCount - 1 -> inflateLibPage(layoutInflater, parent, position)
+            else -> throw InvalidParameterException()
+        }
+    }
+
+    /**
+     * Create the main view with the cutout
+     */
+    open fun inflateMainPage(layoutInflater: LayoutInflater, parent: ViewGroup, position: Int): View {
+        val fastAdapter = FastItemThemedAdapter<IItem<*, *>>(configs)
+        val recycler = fullLinearRecycler(fastAdapter)
+        fastAdapter.add(CutoutIItem {
+            with(configs) {
+                text = string(cutoutTextRes, cutoutText)
+                drawable = drawable(cutoutDrawableRes, cutoutDrawable)
+                if (configs.cutoutForeground != null) foregroundColor = configs.cutoutForeground!!
+            }
+        }.apply {
+            themeEnabled = configs.cutoutForeground == null
+        })
+        postInflateMainPage(fastAdapter)
+        return recycler
+    }
+
+    /**
+     * Open hook called just before the main page view is returned
+     * Feel free to add your own items to the adapter in here
+     */
+    open fun postInflateMainPage(adapter: FastItemThemedAdapter<IItem<*, *>>) {
+
+    }
+
+    /**
+     * Create the lib view with the list of libraries
+     */
+    open fun inflateLibPage(layoutInflater: LayoutInflater, parent: ViewGroup, position: Int): View {
+        libPage = position
+        val v = layoutInflater.inflate(R.layout.kau_recycler_detached_background, parent, false)
+        val recycler = v.findViewById<RecyclerView>(R.id.kau_recycler_detached)
+        libRecycler = recycler
+        recycler.adapter = libAdapter
+        recycler.itemAnimator = FadeScaleAnimator(itemDelayFactor = 0.2f).apply { addDuration = 300; interpolator = AnimHolder.decelerateInterpolator(this@AboutActivityBase) }
+        val background = v.findViewById<View>(R.id.kau_recycler_detached_background)
+        if (configs.backgroundColor != null) background.setBackgroundColor(configs.backgroundColor!!.colorToForeground())
+        doAsync {
+            libItems = getLibraries(
+                    if (rClass == null) Libs(this@AboutActivityBase) else Libs(this@AboutActivityBase, Libs.toStringArray(rClass.fields))
+            ).map { LibraryIItem(it) }
+            if (libPage >= 0 && pageStatus[libPage] == 1)
+                uiThread { addLibItems() }
+        }
+        return v
+    }
+
+    inner class AboutPagerAdapter : PagerAdapter() {
+
+        private val layoutInflater: LayoutInflater = LayoutInflater.from(this@AboutActivityBase)
+        private val views = Array<View?>(pageCount) { null }
+
+        override fun instantiateItem(collection: ViewGroup, position: Int): Any {
+            val layout = getPage(position, collection)
+            collection.addView(layout)
+            return layout
+        }
+
+        override fun destroyItem(collection: ViewGroup, position: Int, view: Any) {
+            collection.removeView(view as View)
+            views[position] = null
+        }
+
+        override fun getCount(): Int = pageCount
+
+        override fun isViewFromObject(view: View, `object`: Any): Boolean = view === `object`
+
+        /**
+         * Only get page if view does not exist
+         */
+        private fun getPage(position: Int, parent: ViewGroup): View {
+            if (views[position] == null) views[position] = getPage(position, layoutInflater, parent)
+            return views[position]!!
+        }
+    }
+
+    override fun onPageScrollStateChanged(state: Int) {}
+
+    override fun onPageScrolled(position: Int, positionOffset: Float, positionOffsetPixels: Int) {}
+
+    override fun onPageSelected(position: Int) {
+        if (pageStatus[position] == 0) pageStatus[position] = 1 // mark as seen if previously null
+        if (position == libPage && libItems != null && pageStatus[position] == 1) {
+            pageStatus[position] = 2            //add libs and mark as such
+            postDelayed(300) { addLibItems() }  //delay so that the animations occur once the page is fully switched
+        }
+    }
+
+    /**
+     * Function that is called when the view is ready to add the lib items
+     * Feel free to add your own items here
+     */
+    open fun addLibItems() {
+        libAdapter.add(HeaderIItem(text = configs.libPageTitle, textRes = configs.libPageTitleRes))
+                .add(libItems)
+    }
+
+    override fun onDestroy() {
+        AnimHolder.decelerateInterpolator.invalidate() //clear the reference to the interpolators we've used
+        super.onDestroy()
+    }
+}
\ No newline at end of file
diff --git a/about/src/main/kotlin/ca/allanwang/kau/about/CutoutIItem.kt b/about/src/main/kotlin/ca/allanwang/kau/about/CutoutIItem.kt
new file mode 100644
index 0000000..34e8641
--- /dev/null
+++ b/about/src/main/kotlin/ca/allanwang/kau/about/CutoutIItem.kt
@@ -0,0 +1,48 @@
+package ca.allanwang.kau.about
+
+import android.support.v7.widget.RecyclerView
+import android.view.View
+import ca.allanwang.kau.R
+import ca.allanwang.kau.adapters.ThemableIItem
+import ca.allanwang.kau.adapters.ThemableIItemDelegate
+import ca.allanwang.kau.ui.views.CutoutView
+import ca.allanwang.kau.utils.bindView
+import com.mikepenz.fastadapter.items.AbstractItem
+
+/**
+ * Created by Allan Wang on 2017-06-28.
+ *
+ * Just a cutout item with some defaults in [R.layout.kau_iitem_cutout]
+ */
+class CutoutIItem(val config: CutoutView.() -> Unit = {}
+) : AbstractItem<CutoutIItem, CutoutIItem.ViewHolder>(), ThemableIItem by ThemableIItemDelegate() {
+
+    override fun getType(): Int = R.id.kau_item_cutout
+
+    override fun getLayoutRes(): Int = R.layout.kau_iitem_cutout
+
+    override fun isSelectable(): Boolean = false
+
+    override fun bindView(holder: ViewHolder, payloads: MutableList<Any>?) {
+        super.bindView(holder, payloads)
+        with(holder) {
+            if (accentColor != null && themeEnabled) cutout.foregroundColor = accentColor!!
+            cutout.config()
+        }
+    }
+
+    override fun unbindView(holder: ViewHolder) {
+        super.unbindView(holder)
+        with(holder) {
+            cutout.drawable = null
+            cutout.text = "Text" //back to default
+        }
+    }
+
+    override fun getViewHolder(v: View): ViewHolder = ViewHolder(v)
+
+    class ViewHolder(v: View) : RecyclerView.ViewHolder(v) {
+        val cutout: CutoutView by bindView(R.id.kau_cutout)
+    }
+
+}
\ No newline at end of file
diff --git a/about/src/main/kotlin/ca/allanwang/kau/about/LibraryIItem.kt b/about/src/main/kotlin/ca/allanwang/kau/about/LibraryIItem.kt
new file mode 100644
index 0000000..1b832a2
--- /dev/null
+++ b/about/src/main/kotlin/ca/allanwang/kau/about/LibraryIItem.kt
@@ -0,0 +1,99 @@
+package ca.allanwang.kau.about
+
+import android.os.Build
+import android.support.v7.widget.CardView
+import android.support.v7.widget.RecyclerView
+import android.text.Html
+import android.view.View
+import android.widget.TextView
+import ca.allanwang.kau.R
+import ca.allanwang.kau.adapters.ThemableIItem
+import ca.allanwang.kau.adapters.ThemableIItemDelegate
+import ca.allanwang.kau.utils.bindView
+import ca.allanwang.kau.utils.gone
+import ca.allanwang.kau.utils.startLink
+import ca.allanwang.kau.utils.visible
+import com.mikepenz.aboutlibraries.entity.Library
+import com.mikepenz.fastadapter.FastAdapter
+import com.mikepenz.fastadapter.IItem
+import com.mikepenz.fastadapter.items.AbstractItem
+
+/**
+ * Created by Allan Wang on 2017-06-27.
+ */
+class LibraryIItem(val lib: Library
+) : AbstractItem<LibraryIItem, LibraryIItem.ViewHolder>(), ThemableIItem by ThemableIItemDelegate() {
+
+    companion object {
+        @JvmStatic fun bindClickEvents(fastAdapter: FastAdapter<IItem<*, *>>) {
+            fastAdapter.withOnClickListener { v, _, item, _ ->
+                if (item !is LibraryIItem) false
+                else {
+                    val c = v.context
+                    with(item.lib) {
+                        c.startLink(libraryWebsite, repositoryLink, authorWebsite)
+                    }
+                    true
+                }
+            }
+        }
+    }
+
+    override fun getType(): Int = R.id.kau_item_library
+
+    override fun getLayoutRes(): Int = R.layout.kau_iitem_library
+
+    override fun isSelectable(): Boolean = false
+
+    override fun bindView(holder: ViewHolder, payloads: MutableList<Any>?) {
+        super.bindView(holder, payloads)
+        with(holder) {
+            name.text = lib.libraryName
+            creator.text = lib.author
+            description.text = if (lib.libraryDescription.isBlank()) lib.libraryDescription
+            else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N)
+                Html.fromHtml(lib.libraryDescription, Html.FROM_HTML_MODE_LEGACY)
+            else Html.fromHtml(lib.libraryDescription)
+            bottomDivider.gone()
+            if (lib.libraryVersion?.isNotBlank() ?: false) {
+                bottomDivider.visible()
+                version.visible().text = lib.libraryVersion
+            }
+            if (lib.license?.licenseName?.isNotBlank() ?: false) {
+                bottomDivider.visible()
+                license.visible().text = lib.license?.licenseName
+            }
+            bindTextColor(name, creator)
+            bindTextColorSecondary(description)
+            bindAccentColor(license, version)
+            bindDividerColor(divider, bottomDivider)
+            bindBackgroundRipple(card)
+        }
+    }
+
+    override fun unbindView(holder: ViewHolder) {
+        super.unbindView(holder)
+        with(holder) {
+            name.text = null
+            creator.text = null
+            description.text = null
+            bottomDivider.gone()
+            version.gone().text = null
+            license.gone().text = null
+        }
+    }
+
+    override fun getViewHolder(v: View): ViewHolder = ViewHolder(v)
+
+    class ViewHolder(v: View) : RecyclerView.ViewHolder(v) {
+        val card: CardView by bindView(R.id.lib_item_card)
+        val name: TextView by bindView(R.id.lib_item_name)
+        val creator: TextView by bindView(R.id.lib_item_author)
+        val description: TextView by bindView(R.id.lib_item_description)
+        val version: TextView by bindView(R.id.lib_item_version)
+        val license: TextView by bindView(R.id.lib_item_license)
+        val divider: View by bindView(R.id.lib_item_top_divider)
+        val bottomDivider: View by bindView(R.id.lib_item_bottom_divider)
+    }
+
+}
\ No newline at end of file
diff --git a/about/src/main/res/layout/kau_about_section_libraries.xml b/about/src/main/res/layout/kau_about_section_libraries.xml
new file mode 100644
index 0000000..c14225e
--- /dev/null
+++ b/about/src/main/res/layout/kau_about_section_libraries.xml
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/about_library_container"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <TextView
+        android:id="@+id/about_library_title"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_margin="@dimen/kau_activity_horizontal_margin"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.5"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <android.support.v7.widget.RecyclerView
+        android:id="@+id/about_library_recycler"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/about_library_title" />
+
+</android.support.constraint.ConstraintLayout>
diff --git a/about/src/main/res/layout/kau_about_section_main.xml b/about/src/main/res/layout/kau_about_section_main.xml
new file mode 100644
index 0000000..40d8dfb
--- /dev/null
+++ b/about/src/main/res/layout/kau_about_section_main.xml
@@ -0,0 +1,46 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.v4.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:showIn="@layout/kau_activity_about">
+
+    <android.support.constraint.ConstraintLayout
+        android:id="@+id/about_main_container"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content">
+
+        <ca.allanwang.kau.views.CutoutView
+            android:id="@+id/about_main_cutout"
+            android:layout_width="0dp"
+            android:layout_height="@dimen/kau_about_header_height"
+            android:minHeight="@dimen/kau_about_header_height"
+            app:foregroundColor="?android:colorAccent"
+            app:heightPercentageToScreen="0.5"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent" />
+
+        <FrameLayout
+            android:id="@+id/about_main_bottom_container"
+            android:layout_width="0dp"
+            android:layout_height="2000dp"
+            android:background="?android:attr/colorBackground"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/about_main_cutout">
+
+            <TextView
+                android:id="@+id/about_main_bottom_text"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center_horizontal"
+                android:layout_margin="@dimen/activity_horizontal_margin" />
+
+        </FrameLayout>
+
+    </android.support.constraint.ConstraintLayout>
+
+</android.support.v4.widget.NestedScrollView>
diff --git a/about/src/main/res/layout/kau_activity_about.xml b/about/src/main/res/layout/kau_activity_about.xml
new file mode 100644
index 0000000..3d1f9ab
--- /dev/null
+++ b/about/src/main/res/layout/kau_activity_about.xml
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ca.allanwang.kau.ui.widgets.ElasticDragDismissFrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/about_draggable_frame"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    app:dragDismissDistance="@dimen/kau_drag_dismiss_distance"
+    app:dragDismissScale="0.95"
+    tools:context=".ui.about.AboutActivityBase">
+
+    <android.support.v4.view.ViewPager
+        android:id="@+id/about_pager"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+
+    <ca.allanwang.kau.ui.widgets.InkPageIndicator
+        android:id="@+id/about_indicator"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="top|center_horizontal"
+        android:layout_marginTop="@dimen/kau_padding_normal"
+        app:currentPageIndicatorColor="@color/kau_about_page_indicator_dark_selected"
+        app:pageIndicatorColor="@color/kau_about_page_indicator_dark" />
+
+</ca.allanwang.kau.ui.widgets.ElasticDragDismissFrameLayout>
diff --git a/about/src/main/res/layout/kau_iitem_cutout.xml b/about/src/main/res/layout/kau_iitem_cutout.xml
new file mode 100644
index 0000000..b3a841e
--- /dev/null
+++ b/about/src/main/res/layout/kau_iitem_cutout.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ca.allanwang.kau.ui.views.CutoutView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/kau_cutout"
+    android:layout_width="match_parent"
+    android:layout_height="@dimen/kau_about_header_height"
+    android:minHeight="@dimen/kau_about_header_height"
+    app:foregroundColor="?android:colorAccent"
+    app:heightPercentageToScreen="0.5" />
\ No newline at end of file
diff --git a/about/src/main/res/layout/kau_iitem_library.xml b/about/src/main/res/layout/kau_iitem_library.xml
new file mode 100644
index 0000000..1c3de5c
--- /dev/null
+++ b/about/src/main/res/layout/kau_iitem_library.xml
@@ -0,0 +1,124 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/lib_item_card"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:layout_marginBottom="@dimen/kau_padding_normal"
+    android:background="?android:selectableItemBackground"
+    android:clickable="true">
+
+    <android.support.constraint.ConstraintLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:paddingBottom="@dimen/kau_padding_normal"
+        android:paddingEnd="@dimen/kau_padding_normal"
+        android:paddingStart="@dimen/kau_padding_normal"
+        android:paddingTop="@dimen/kau_padding_normal">
+
+        <android.support.constraint.Guideline
+            android:id="@+id/lib_g_m_v"
+            android:layout_width="1dp"
+            android:layout_height="wrap_content"
+            android:orientation="vertical"
+            app:layout_constraintGuide_percent="0.5" />
+
+        <TextView
+            android:id="@+id/lib_item_name"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:ellipsize="end"
+            android:gravity="start"
+            android:maxLines="1"
+            android:textSize="@dimen/textSizeLarge_openSource"
+            android:textStyle="normal"
+            app:layout_constraintEnd_toStartOf="@id/lib_g_m_v"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            tools:text="Library name" />
+
+        <TextView
+            android:id="@+id/lib_item_author"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="2dp"
+            android:gravity="end"
+            android:maxLines="2"
+            android:textSize="@dimen/textSizeSmall_openSource"
+            android:textStyle="normal"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toEndOf="@id/lib_g_m_v"
+            app:layout_constraintTop_toTopOf="parent"
+            tools:text="Author" />
+
+        <android.support.constraint.Barrier
+            android:id="@+id/lib_item_top_divider"
+            android:layout_width="wrap_content"
+            android:layout_height="1px"
+            android:layout_marginTop="@dimen/kau_spacing_micro"
+            app:barrierDirection="bottom"
+            app:constraint_referenced_ids="lib_item_name,lib_item_author"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent" />
+
+        <TextView
+            android:id="@+id/lib_item_description"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:maxLines="20"
+            android:paddingBottom="@dimen/kau_spacing_normal"
+            android:paddingTop="@dimen/kau_spacing_normal"
+            android:textSize="@dimen/textSizeSmall_openSource"
+            android:textStyle="normal"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/lib_item_top_divider"
+            tools:text="Description" />
+
+        <View
+            android:id="@+id/lib_item_bottom_divider"
+            android:layout_width="match_parent"
+            android:layout_height="1px"
+            android:layout_marginTop="@dimen/kau_spacing_micro"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/lib_item_description" />
+
+        <TextView
+            android:id="@+id/lib_item_version"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginEnd="@dimen/kau_spacing_normal"
+            android:layout_marginTop="@dimen/kau_spacing_micro"
+            android:layout_weight="1"
+            android:gravity="start"
+            android:maxLines="1"
+            android:textSize="@dimen/textSizeSmall_openSource"
+            android:textStyle="normal"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toStartOf="@id/lib_g_m_v"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/lib_item_bottom_divider"
+            tools:text="Version" />
+
+        <TextView
+            android:id="@+id/lib_item_license"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="@dimen/kau_spacing_normal"
+            android:layout_marginTop="@dimen/kau_spacing_micro"
+            android:layout_weight="1"
+            android:gravity="end"
+            android:maxLines="1"
+            android:textSize="@dimen/textSizeSmall_openSource"
+            android:textStyle="normal"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toEndOf="@id/lib_g_m_v"
+            app:layout_constraintTop_toBottomOf="@id/lib_item_bottom_divider"
+            tools:text="License" />
+
+    </android.support.constraint.ConstraintLayout>
+
+</android.support.v7.widget.CardView>
\ No newline at end of file
diff --git a/about/src/main/res/transition/kau_about_return_downward.xml b/about/src/main/res/transition/kau_about_return_downward.xml
new file mode 100644
index 0000000..b040b1b
--- /dev/null
+++ b/about/src/main/res/transition/kau_about_return_downward.xml
@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright 2015 Google Inc.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+  -->
+
+<transitionSet
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:transitionOrdering="together"
+    android:interpolator="@android:interpolator/fast_out_linear_in">
+
+    <slide
+        android:slideEdge="bottom"
+        android:duration="400">
+        <targets>
+            <target android:excludeId="@android:id/navigationBarBackground" />
+            <target android:excludeId="@android:id/statusBarBackground" />
+        </targets>
+    </slide>
+
+    <fade
+        android:startDelay="200"
+        android:duration="200">
+        <targets>
+            <target android:targetId="@id/about_indicator" />
+            <!--<target android:targetId="@id/libraries_intro" />-->
+            <!--<target android:targetId="@id/libs_list_background" />-->
+        </targets>
+    </fade>
+
+    <fade android:duration="400">
+        <targets>
+            <target android:targetId="@android:id/navigationBarBackground" />
+            <target android:targetId="@android:id/statusBarBackground" />
+        </targets>
+    </fade>
+
+</transitionSet>
diff --git a/about/src/main/res/transition/kau_about_return_upwards.xml b/about/src/main/res/transition/kau_about_return_upwards.xml
new file mode 100644
index 0000000..64b3f5e
--- /dev/null
+++ b/about/src/main/res/transition/kau_about_return_upwards.xml
@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright 2015 Google Inc.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+  -->
+
+<transitionSet
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:transitionOrdering="together"
+    android:interpolator="@android:interpolator/fast_out_linear_in">
+
+    <slide
+        android:slideEdge="top"
+        android:duration="400">
+        <targets>
+            <target android:excludeId="@android:id/navigationBarBackground" />
+            <target android:excludeId="@android:id/statusBarBackground" />
+        </targets>
+    </slide>
+
+    <fade
+        android:startDelay="200"
+        android:duration="200">
+        <targets>
+            <target android:targetId="@id/about_indicator" />
+            <!--<target android:targetId="@id/libraries_intro" />-->
+            <!--<target android:targetId="@id/libs_list_background" />-->
+
+        </targets>
+    </fade>
+
+    <fade android:duration="400">
+        <targets>
+            <target android:targetId="@android:id/navigationBarBackground" />
+            <target android:targetId="@android:id/statusBarBackground" />
+        </targets>
+    </fade>
+
+</transitionSet>
diff --git a/about/src/main/res/values/styles.xml b/about/src/main/res/values/styles.xml
new file mode 100644
index 0000000..59b2470
--- /dev/null
+++ b/about/src/main/res/values/styles.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <style name="Kau.Translucent.About">
+        <item name="android:windowEnterTransition">@transition/kau_enter_slide_top</item>
+        <item name="android:windowReturnTransition">@transition/kau_about_return_upwards</item>
+    </style>
+
+</resources>
\ No newline at end of file
diff --git a/about/src/test/java/ca/allanwang/kau/ExampleUnitTest.java b/about/src/test/java/ca/allanwang/kau/ExampleUnitTest.java
new file mode 100644
index 0000000..a29b447
--- /dev/null
+++ b/about/src/test/java/ca/allanwang/kau/ExampleUnitTest.java
@@ -0,0 +1,17 @@
+package ca.allanwang.kau;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+public class ExampleUnitTest {
+    @Test
+    public void addition_isCorrect() throws Exception {
+        assertEquals(4, 2 + 2);
+    }
+}
\ No newline at end of file