Move components to separate modules

22 files changed, 1732 insertions, 0 deletions

diff --git a/adapter/.gitignore b/adapter/.gitignore
new file mode 100644
index 0000000..796b96d
--- /dev/null
+++ b/adapter/.gitignore
@@ -0,0 +1 @@
+/build
diff --git a/adapter/build.gradle b/adapter/build.gradle
new file mode 100644
index 0000000..82c89b0
--- /dev/null
+++ b/adapter/build.gradle
@@ -0,0 +1,61 @@
+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')
+
+    compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+    testCompile "org.jetbrains.kotlin:kotlin-test-junit:$kotlin_version"
+
+    compile "com.mikepenz:fastadapter:${FAST_ADAPTER}@aar"
+    compile "com.mikepenz:fastadapter-commons:${FAST_ADAPTER_COMMONS}@aar"
+}
+
+apply from: '../artifacts.gradle'
diff --git a/adapter/progress-proguard.txt b/adapter/progress-proguard.txt
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/adapter/progress-proguard.txt
@@ -0,0 +1 @@
+
diff --git a/adapter/src/androidTest/java/ca/allanwang/kau/adapter/ExampleInstrumentedTest.java b/adapter/src/androidTest/java/ca/allanwang/kau/adapter/ExampleInstrumentedTest.java
new file mode 100644
index 0000000..3e64d38
--- /dev/null
+++ b/adapter/src/androidTest/java/ca/allanwang/kau/adapter/ExampleInstrumentedTest.java
@@ -0,0 +1,26 @@
+package ca.allanwang.kau.adapter;
+
+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.adapter.test", appContext.getPackageName());
+    }
+}
diff --git a/adapter/src/main/AndroidManifest.xml b/adapter/src/main/AndroidManifest.xml
new file mode 100644
index 0000000..5d9b790
--- /dev/null
+++ b/adapter/src/main/AndroidManifest.xml
@@ -0,0 +1 @@
+<manifest package="ca.allanwang.kau.adapter" />
diff --git a/adapter/src/main/kotlin/ca/allanwang/kau/adapters/ChainedAdapters.kt b/adapter/src/main/kotlin/ca/allanwang/kau/adapters/ChainedAdapters.kt
new file mode 100644
index 0000000..e1c5c18
--- /dev/null
+++ b/adapter/src/main/kotlin/ca/allanwang/kau/adapters/ChainedAdapters.kt
@@ -0,0 +1,85 @@
+package ca.allanwang.kau.adapters
+
+import android.support.v7.widget.LinearLayoutManager
+import android.support.v7.widget.RecyclerView
+import com.mikepenz.fastadapter.IItem
+import com.mikepenz.fastadapter.adapters.HeaderAdapter
+import com.mikepenz.fastadapter.commons.adapters.FastItemAdapter
+import org.jetbrains.anko.collections.forEachReversedWithIndex
+import java.util.*
+
+/**
+ * Created by Allan Wang on 2017-06-27.
+ *
+ * Once bounded to a [RecyclerView], this will
+ * - Chain together a list of [HeaderAdapter]s, backed by a generic [FastItemAdapter]
+ * - Add a [LinearLayoutManager] to the recycler
+ * - Add a listener for when a new adapter segment is being used
+ */
+class ChainedAdapters<T>(vararg items: Pair<T, SectionAdapter<*>>) {
+    private val chain: MutableList<Pair<T, SectionAdapter<*>>> = mutableListOf(*items)
+    val baseAdapter: FastItemAdapter<IItem<*, *>> = FastItemAdapter()
+    private val indexStack = Stack<Int>()
+    var recycler: RecyclerView? = null
+    val firstVisibleItemPosition: Int
+        get() = (recycler?.layoutManager as LinearLayoutManager?)?.findFirstVisibleItemPosition() ?: throw IllegalArgumentException("No recyclerview was bounded to the chain adapters")
+
+    fun add(vararg items: Pair<T, SectionAdapter<*>>) = add(items.toList())
+
+    fun add(items: Collection<Pair<T, SectionAdapter<*>>>): ChainedAdapters<T> {
+        if (recycler != null) throw IllegalAccessException("Chain adapter is already bounded to a recycler; cannot add directly.")
+        items.map { it.second }.forEachIndexed { index, sectionAdapter -> sectionAdapter.sectionOrder = chain.size + 1 + index }
+        chain.addAll(items)
+        return this
+    }
+
+    operator fun get(index: Int) = chain[index]
+
+    /**
+     * Attaches the chain to a recycler
+     * After this stage, any modifications to the adapters must be done through external references
+     * You may still get the generic header adapters through the get operator
+     * Binding the recycler also involves supplying a callback, which returns
+     * the item (T) associated with the adapter,
+     * the index (Int) of the current adapter
+     * and the dy (Int) as given by the scroll listener
+     */
+    fun bindRecyclerView(recyclerView: RecyclerView, onAdapterSectionChanged: (item: T, index: Int, dy: Int) -> Unit) {
+        if (recycler != null) throw IllegalStateException("Chain adapter is already bounded")
+        if (chain.isEmpty()) throw IllegalArgumentException("No adapters have been added to the adapters list")
+        //wrap adapters
+        chain.map { it.second }.forEachReversedWithIndex { i, headerAdapter ->
+            if (i == chain.size - 1) headerAdapter.wrap(baseAdapter)
+            else headerAdapter.wrap(chain[i + 1].second)
+        }
+        recycler = recyclerView
+        indexStack.push(0)
+        with(recyclerView) {
+            layoutManager = LinearLayoutManager(context)
+            adapter = chain.first().second
+            addOnScrollListener(object : RecyclerView.OnScrollListener() {
+                override fun onScrolled(rv: RecyclerView, dx: Int, dy: Int) {
+                    super.onScrolled(rv, dx, dy)
+                    val topPosition = firstVisibleItemPosition
+                    val currentAdapterIndex = indexStack.peek()
+                    if (dy > 0) {
+                        //look ahead from current adapter
+                        val nextAdapterIndex = (currentAdapterIndex until chain.size).asSequence()
+                                .firstOrNull {
+                                    val adapter = chain[it].second
+                                    adapter.adapterItemCount > 0 && adapter.getGlobalPosition(adapter.adapterItemCount - 1) >= topPosition
+                                } ?: currentAdapterIndex
+                        if (nextAdapterIndex == currentAdapterIndex) return
+                        indexStack.push(nextAdapterIndex)
+                        onAdapterSectionChanged(chain[indexStack.peek()].first, indexStack.peek(), dy)
+                    } else if (currentAdapterIndex == 0) {
+                        return //All adapters may be empty; in this case, if we are already at the beginning, don't bother checking
+                    } else if (chain[currentAdapterIndex].second.getGlobalPosition(0) > topPosition) {
+                        indexStack.pop()
+                        onAdapterSectionChanged(chain[indexStack.peek()].first, indexStack.peek(), dy)
+                    }
+                }
+            })
+        }
+    }
+}
\ No newline at end of file
diff --git a/adapter/src/main/kotlin/ca/allanwang/kau/adapters/FastItemThemedAdapter.kt b/adapter/src/main/kotlin/ca/allanwang/kau/adapters/FastItemThemedAdapter.kt
new file mode 100644
index 0000000..0de1dca
--- /dev/null
+++ b/adapter/src/main/kotlin/ca/allanwang/kau/adapters/FastItemThemedAdapter.kt
@@ -0,0 +1,189 @@
+package ca.allanwang.kau.adapters
+
+import android.content.res.ColorStateList
+import android.view.View
+import android.widget.ImageView
+import android.widget.TextView
+import ca.allanwang.kau.utils.adjustAlpha
+import ca.allanwang.kau.ui.createSimpleRippleDrawable
+import com.mikepenz.fastadapter.IExpandable
+import com.mikepenz.fastadapter.IItem
+import com.mikepenz.fastadapter.ISubItem
+import com.mikepenz.fastadapter.commons.adapters.FastItemAdapter
+
+/**
+ * Created by Allan Wang on 2017-06-29.
+ *
+ * Adapter with a set of colors that will be added to all subsequent items
+ * Changing a color while the adapter is not empty will reload all items
+ *
+ * This adapter overrides every method where an item is added
+ * If that item extends [ThemableIItem], then the colors will be set
+ */
+class FastItemThemedAdapter<Item : IItem<*, *>>(
+        textColor: Int? = null,
+        backgroundColor: Int? = null,
+        accentColor: Int? = null
+) : FastItemAdapter<Item>() {
+    constructor(colors: ThemableIItemColors) : this(colors.textColor, colors.backgroundColor, colors.accentColor)
+
+    var textColor: Int? = textColor
+        set(value) {
+            if (field == value) return
+            field = value
+            themeChanged()
+        }
+    var backgroundColor: Int? = backgroundColor
+        set(value) {
+            if (field == value) return
+            field = value
+            themeChanged()
+        }
+    var accentColor: Int? = accentColor
+        set(value) {
+            if (field == value) return
+            field = value
+            themeChanged()
+        }
+
+    fun setColors(colors: ThemableIItemColors) {
+        this.textColor = colors.textColor
+        this.backgroundColor = colors.backgroundColor
+        this.accentColor = colors.accentColor
+    }
+
+    fun themeChanged() {
+        if (adapterItemCount == 0) return
+        injectTheme(adapterItems)
+        notifyAdapterDataSetChanged()
+    }
+
+    override fun add(position: Int, items: MutableList<Item>): FastItemAdapter<Item> {
+        injectTheme(items)
+        return super.add(position, items)
+    }
+
+    override fun add(position: Int, item: Item): FastItemAdapter<Item> {
+        injectTheme(item)
+        return super.add(position, item)
+    }
+
+    override fun add(item: Item): FastItemAdapter<Item> {
+        injectTheme(item)
+        return super.add(item)
+    }
+
+    override fun add(items: MutableList<Item>): FastItemAdapter<Item> {
+        injectTheme(items)
+        injectTheme(items)
+        return super.add(items)
+    }
+
+    override fun set(items: MutableList<Item>?): FastItemAdapter<Item> {
+        injectTheme(items)
+        return super.set(items)
+    }
+
+    override fun set(position: Int, item: Item): FastItemAdapter<Item> {
+        injectTheme(item)
+        return super.set(position, item)
+    }
+
+    override fun setNewList(items: MutableList<Item>?, retainFilter: Boolean): FastItemAdapter<Item> {
+        injectTheme(items)
+        return super.setNewList(items, retainFilter)
+    }
+
+    override fun setNewList(items: MutableList<Item>?): FastItemAdapter<Item> {
+        injectTheme(items)
+        return super.setNewList(items)
+    }
+
+    override fun <T, S> setSubItems(collapsible: T, subItems: MutableList<S>?): T where S : IItem<*, *>?, T : IItem<*, *>?, T : IExpandable<T, S>?, S : ISubItem<Item, T>? {
+        injectTheme(subItems)
+        return super.setSubItems(collapsible, subItems)
+    }
+
+    internal fun injectTheme(items: Collection<IItem<*, *>?>?) {
+        items?.forEach { injectTheme(it) }
+    }
+
+    internal fun injectTheme(item: IItem<*, *>?) {
+        if (item is ThemableIItem && item.themeEnabled) {
+            item.textColor = textColor
+            item.backgroundColor = backgroundColor
+            item.accentColor = accentColor
+        }
+    }
+}
+
+interface ThemableIItemColors {
+    var textColor: Int?
+    var backgroundColor: Int?
+    var accentColor: Int?
+}
+
+class ThemableIItemColorsDelegate : ThemableIItemColors {
+    override var textColor: Int? = null
+    override var backgroundColor: Int? = null
+    override var accentColor: Int? = null
+}
+
+/**
+ * Interface that needs to be implemented by every iitem
+ * Holds the color values and has helper methods to inject the colors
+ */
+interface ThemableIItem : ThemableIItemColors {
+    var themeEnabled: Boolean
+    fun bindTextColor(vararg views: TextView?)
+    fun bindTextColorSecondary(vararg views: TextView?)
+    fun bindDividerColor(vararg views: View?)
+    fun bindAccentColor(vararg views: TextView?)
+    fun bindBackgroundColor(vararg views: View?)
+    fun bindBackgroundRipple(vararg views: View?)
+    fun bindIconColor(vararg views: ImageView?)
+}
+
+/**
+ * The delegate for [ThemableIItem]
+ */
+class ThemableIItemDelegate : ThemableIItem, ThemableIItemColors by ThemableIItemColorsDelegate() {
+    override var themeEnabled: Boolean = true
+
+    override fun bindTextColor(vararg views: TextView?) {
+        val color = textColor ?: return
+        views.forEach { it?.setTextColor(color) }
+    }
+
+    override fun bindTextColorSecondary(vararg views: TextView?) {
+        val color = textColor?.adjustAlpha(0.8f) ?: return
+        views.forEach { it?.setTextColor(color) }
+    }
+
+    override fun bindAccentColor(vararg views: TextView?) {
+        val color = accentColor ?: textColor ?: return
+        views.forEach { it?.setTextColor(color) }
+    }
+
+    override fun bindDividerColor(vararg views: View?) {
+        val color = (textColor ?: accentColor)?.adjustAlpha(0.1f) ?: return
+        views.forEach { it?.setBackgroundColor(color) }
+    }
+
+    override fun bindBackgroundColor(vararg views: View?) {
+        val color = backgroundColor ?: return
+        views.forEach { it?.setBackgroundColor(color) }
+    }
+
+    override fun bindBackgroundRipple(vararg views: View?) {
+        val foreground = accentColor ?: textColor ?: return
+        val background = backgroundColor ?: return
+        val ripple = createSimpleRippleDrawable(foreground, background)
+        views.forEach { it?.background = ripple }
+    }
+
+    override fun bindIconColor(vararg views: ImageView?) {
+        val color = accentColor ?: textColor ?: return
+        views.forEach { it?.drawable?.setTintList(ColorStateList.valueOf(color)) }
+    }
+}
\ No newline at end of file
diff --git a/adapter/src/main/kotlin/ca/allanwang/kau/adapters/SectionAdapter.kt b/adapter/src/main/kotlin/ca/allanwang/kau/adapters/SectionAdapter.kt
new file mode 100644
index 0000000..cf7205a
--- /dev/null
+++ b/adapter/src/main/kotlin/ca/allanwang/kau/adapters/SectionAdapter.kt
@@ -0,0 +1,13 @@
+package ca.allanwang.kau.adapters
+
+import com.mikepenz.fastadapter.IItem
+import com.mikepenz.fastadapter.adapters.HeaderAdapter
+
+/**
+ * Created by Allan Wang on 2017-06-27.
+ *
+ * Extension of [HeaderAdapter] where we can define the order
+ */
+class SectionAdapter<Item : IItem<*, *>>(var sectionOrder: Int = 100) : HeaderAdapter<Item>() {
+    override fun getOrder(): Int = sectionOrder
+}
\ No newline at end of file
diff --git a/adapter/src/main/kotlin/ca/allanwang/kau/animators/BaseDelayAnimator.kt b/adapter/src/main/kotlin/ca/allanwang/kau/animators/BaseDelayAnimator.kt
new file mode 100644
index 0000000..c649376
--- /dev/null
+++ b/adapter/src/main/kotlin/ca/allanwang/kau/animators/BaseDelayAnimator.kt
@@ -0,0 +1,45 @@
+package ca.allanwang.kau.animators
+
+import android.support.v7.widget.RecyclerView
+import android.view.ViewPropertyAnimator
+
+/**
+ * Created by Allan Wang on 2017-06-27.
+ *
+ * Base for delayed animators
+ * item delay factor by default can be 0.125f
+ */
+abstract class BaseDelayAnimator(val itemDelayFactor: Float) : DefaultAnimator() {
+
+    override abstract fun addAnimationPrepare(holder: RecyclerView.ViewHolder)
+
+    override fun addAnimation(holder: RecyclerView.ViewHolder): ViewPropertyAnimator {
+        return holder.itemView.animate().apply {
+            startDelay = Math.max(0L, (holder.adapterPosition * addDuration * itemDelayFactor).toLong())
+            duration = this@BaseDelayAnimator.addDuration
+            interpolator = this@BaseDelayAnimator.interpolator
+        }
+    }
+
+
+    override abstract fun addAnimationCleanup(holder: RecyclerView.ViewHolder)
+
+    override fun getAddDelay(remove: Long, move: Long, change: Long): Long = 0
+
+    override fun getRemoveDelay(remove: Long, move: Long, change: Long): Long = 0
+
+    /**
+     * Partial removal animation
+     * As of now, all it does it change the alpha
+     * To have it slide, add onto it in a sub class
+     */
+    override fun removeAnimation(holder: RecyclerView.ViewHolder): ViewPropertyAnimator {
+        return holder.itemView.animate().apply {
+            duration = this@BaseDelayAnimator.removeDuration
+            startDelay = Math.max(0L, (holder.adapterPosition * removeDuration * itemDelayFactor).toLong())
+            interpolator = this@BaseDelayAnimator.interpolator
+        }
+    }
+
+    override abstract fun removeAnimationCleanup(holder: RecyclerView.ViewHolder)
+}
\ No newline at end of file
diff --git a/adapter/src/main/kotlin/ca/allanwang/kau/animators/BaseItemAnimator.java b/adapter/src/main/kotlin/ca/allanwang/kau/animators/BaseItemAnimator.java
new file mode 100644
index 0000000..69c2cf3
--- /dev/null
+++ b/adapter/src/main/kotlin/ca/allanwang/kau/animators/BaseItemAnimator.java
@@ -0,0 +1,764 @@
+package ca.allanwang.kau.animators;
+
+/*
+ * Created by Allan Wang on 2017-06-27.
+ *
+ * Based on Item Animator by {@author Mike Penz}
+ * Rewritten to match with the updated compat dependencies
+ */
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * 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.
+ */
+
+import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
+import android.animation.TimeInterpolator;
+import android.animation.ValueAnimator;
+import android.support.annotation.NonNull;
+import android.support.v4.view.ViewCompat;
+import android.support.v7.widget.RecyclerView.ViewHolder;
+import android.support.v7.widget.SimpleItemAnimator;
+import android.view.View;
+import android.view.ViewPropertyAnimator;
+import android.view.animation.Interpolator;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * This implementation of {@link android.support.v7.widget.RecyclerView.ItemAnimator} provides basic
+ * animations on remove, add, and move events that happen to the items in
+ * a RecyclerView. RecyclerView uses a DefaultItemAnimator by default.
+ *
+ * @see android.support.v7.widget.RecyclerView#setItemAnimator(android.support.v7.widget.RecyclerView.ItemAnimator)
+ */
+public abstract class BaseItemAnimator extends SimpleItemAnimator {
+    private static final boolean DEBUG = false;
+
+    private static TimeInterpolator sDefaultInterpolator;
+
+    private ArrayList<ViewHolder> mPendingRemovals = new ArrayList<>();
+    private ArrayList<ViewHolder> mPendingAdditions = new ArrayList<>();
+    private ArrayList<MoveInfo> mPendingMoves = new ArrayList<>();
+    private ArrayList<ChangeInfo> mPendingChanges = new ArrayList<>();
+
+    ArrayList<ArrayList<ViewHolder>> mAdditionsList = new ArrayList<>();
+    ArrayList<ArrayList<MoveInfo>> mMovesList = new ArrayList<>();
+    ArrayList<ArrayList<ChangeInfo>> mChangesList = new ArrayList<>();
+
+    ArrayList<ViewHolder> mAddAnimations = new ArrayList<>();
+    ArrayList<ViewHolder> mMoveAnimations = new ArrayList<>();
+    ArrayList<ViewHolder> mRemoveAnimations = new ArrayList<>();
+    ArrayList<ViewHolder> mChangeAnimations = new ArrayList<>();
+
+    public Interpolator interpolator;
+
+    private static class MoveInfo {
+        public ViewHolder holder;
+        public int fromX, fromY, toX, toY;
+
+        MoveInfo(ViewHolder holder, int fromX, int fromY, int toX, int toY) {
+            this.holder = holder;
+            this.fromX = fromX;
+            this.fromY = fromY;
+            this.toX = toX;
+            this.toY = toY;
+        }
+    }
+
+    public static class ChangeInfo {
+        public ViewHolder oldHolder, newHolder;
+        public int fromX, fromY, toX, toY;
+
+        private ChangeInfo(ViewHolder oldHolder, ViewHolder newHolder) {
+            this.oldHolder = oldHolder;
+            this.newHolder = newHolder;
+        }
+
+        ChangeInfo(ViewHolder oldHolder, ViewHolder newHolder,
+                   int fromX, int fromY, int toX, int toY) {
+            this(oldHolder, newHolder);
+            this.fromX = fromX;
+            this.fromY = fromY;
+            this.toX = toX;
+            this.toY = toY;
+        }
+
+        @Override
+        public String toString() {
+            return "ChangeInfo{"
+                    + "oldHolder=" + oldHolder
+                    + ", newHolder=" + newHolder
+                    + ", fromX=" + fromX
+                    + ", fromY=" + fromY
+                    + ", toX=" + toX
+                    + ", toY=" + toY
+                    + '}';
+        }
+    }
+
+    @Override
+    public void runPendingAnimations() {
+        boolean removalsPending = !mPendingRemovals.isEmpty();
+        boolean movesPending = !mPendingMoves.isEmpty();
+        boolean changesPending = !mPendingChanges.isEmpty();
+        boolean additionsPending = !mPendingAdditions.isEmpty();
+        if (!removalsPending && !movesPending && !additionsPending && !changesPending) {
+            // nothing to animate
+            return;
+        }
+        // First, remove stuff
+        for (ViewHolder holder : mPendingRemovals) {
+            animateRemoveImpl(holder);
+        }
+        mPendingRemovals.clear();
+        // Next, move stuff
+        if (movesPending) {
+            final ArrayList<MoveInfo> moves = new ArrayList<>();
+            moves.addAll(mPendingMoves);
+            mMovesList.add(moves);
+            mPendingMoves.clear();
+            Runnable mover = new Runnable() {
+                @Override
+                public void run() {
+                    for (MoveInfo moveInfo : moves) {
+                        animateMoveImpl(moveInfo.holder, moveInfo.fromX, moveInfo.fromY,
+                                moveInfo.toX, moveInfo.toY);
+                    }
+                    moves.clear();
+                    mMovesList.remove(moves);
+                }
+            };
+            if (removalsPending) {
+                View view = moves.get(0).holder.itemView;
+                ViewCompat.postOnAnimationDelayed(view, mover, 0);
+            } else {
+                mover.run();
+            }
+        }
+        // Next, change stuff, to run in parallel with move animations
+        if (changesPending) {
+            final ArrayList<ChangeInfo> changes = new ArrayList<>();
+            changes.addAll(mPendingChanges);
+            mChangesList.add(changes);
+            mPendingChanges.clear();
+            Runnable changer = new Runnable() {
+                @Override
+                public void run() {
+                    for (ChangeInfo change : changes) {
+                        animateChangeImpl(change);
+                    }
+                    changes.clear();
+                    mChangesList.remove(changes);
+                }
+            };
+            if (removalsPending) {
+                ViewHolder holder = changes.get(0).oldHolder;
+                long moveDuration = movesPending ? getMoveDuration() : 0;
+                ViewCompat.postOnAnimationDelayed(holder.itemView, changer, getRemoveDelay(getRemoveDuration(), moveDuration, getChangeDuration()));
+            } else {
+                changer.run();
+            }
+        }
+        // Next, add stuff
+        if (additionsPending) {
+            final ArrayList<ViewHolder> additions = new ArrayList<>();
+            additions.addAll(mPendingAdditions);
+            mAdditionsList.add(additions);
+            mPendingAdditions.clear();
+            Runnable adder = new Runnable() {
+                @Override
+                public void run() {
+                    for (ViewHolder holder : additions) {
+                        animateAddImpl(holder);
+                    }
+                    additions.clear();
+                    mAdditionsList.remove(additions);
+                }
+            };
+            if (removalsPending || movesPending || changesPending) {
+                long removeDuration = removalsPending ? getRemoveDuration() : 0;
+                long moveDuration = movesPending ? getMoveDuration() : 0;
+                long changeDuration = changesPending ? getChangeDuration() : 0;
+                View view = additions.get(0).itemView;
+                ViewCompat.postOnAnimationDelayed(view, adder, getAddDelay(removeDuration, moveDuration, changeDuration));
+            } else {
+                adder.run();
+            }
+        }
+    }
+
+    /**
+     * used to calculated the delay until the remove animation should start
+     *
+     * @param remove the remove duration
+     * @param move   the move duration
+     * @param change the change duration
+     * @return the calculated delay for the remove items animation
+     */
+    public long getRemoveDelay(long remove, long move, long change) {
+        return remove + Math.max(move, change);
+    }
+
+    /**
+     * used to calculated the delay until the add animation should start
+     *
+     * @param remove the remove duration
+     * @param move   the move duration
+     * @param change the change duration
+     * @return the calculated delay for the add items animation
+     */
+    public long getAddDelay(long remove, long move, long change) {
+        return remove + Math.max(move, change);
+    }
+
+    @Override
+    public boolean animateRemove(final ViewHolder holder) {
+        resetAnimation(holder);
+        mPendingRemovals.add(holder);
+        return true;
+    }
+
+    private void animateRemoveImpl(final ViewHolder holder) {
+        final ViewPropertyAnimator animation = removeAnimation(holder);
+        mRemoveAnimations.add(holder);
+        animation.setListener(new AnimatorListenerAdapter() {
+            @Override
+            public void onAnimationStart(Animator animator) {
+                dispatchRemoveStarting(holder);
+            }
+
+            @Override
+            public void onAnimationEnd(Animator animator) {
+                animation.setListener(null);
+                removeAnimationCleanup(holder);
+                dispatchRemoveFinished(holder);
+                mRemoveAnimations.remove(holder);
+                dispatchFinishedWhenDone();
+            }
+        }).start();
+    }
+
+    abstract public ViewPropertyAnimator removeAnimation(ViewHolder holder);
+
+    abstract public void removeAnimationCleanup(ViewHolder holder);
+
+    @Override
+    public boolean animateAdd(final ViewHolder holder) {
+        resetAnimation(holder);
+        addAnimationPrepare(holder);
+        mPendingAdditions.add(holder);
+        return true;
+    }
+
+    void animateAddImpl(final ViewHolder holder) {
+        final ViewPropertyAnimator animation = addAnimation(holder);
+        mAddAnimations.add(holder);
+        animation.setListener(new AnimatorListenerAdapter() {
+            @Override
+            public void onAnimationStart(Animator animator) {
+                dispatchAddStarting(holder);
+            }
+
+            @Override
+            public void onAnimationCancel(Animator animator) {
+                addAnimationCleanup(holder);
+            }
+
+            @Override
+            public void onAnimationEnd(Animator animator) {
+                animation.setListener(null);
+                dispatchAddFinished(holder);
+                mAddAnimations.remove(holder);
+                dispatchFinishedWhenDone();
+                addAnimationCleanup(holder);
+            }
+        }).start();
+    }
+
+    /**
+     * the animation to prepare the view before the add animation is run
+     *
+     * @param holder
+     */
+    public abstract void addAnimationPrepare(ViewHolder holder);
+
+    /**
+     * the animation for adding a view
+     *
+     * @param holder
+     * @return
+     */
+    public abstract ViewPropertyAnimator addAnimation(ViewHolder holder);
+
+    /**
+     * the cleanup method if the animation needs to be stopped. and tro prepare for the next view
+     *
+     * @param holder
+     */
+    abstract void addAnimationCleanup(ViewHolder holder);
+
+    @Override
+    public boolean animateMove(final ViewHolder holder, int fromX, int fromY,
+                               int toX, int toY) {
+        final View view = holder.itemView;
+        fromX += (int) holder.itemView.getTranslationX();
+        fromY += (int) holder.itemView.getTranslationY();
+        resetAnimation(holder);
+        int deltaX = toX - fromX;
+        int deltaY = toY - fromY;
+        if (deltaX == 0 && deltaY == 0) {
+            dispatchMoveFinished(holder);
+            return false;
+        }
+        if (deltaX != 0) {
+            view.setTranslationX(-deltaX);
+        }
+        if (deltaY != 0) {
+            view.setTranslationY(-deltaY);
+        }
+        mPendingMoves.add(new MoveInfo(holder, fromX, fromY, toX, toY));
+        return true;
+    }
+
+    void animateMoveImpl(final ViewHolder holder, int fromX, int fromY, int toX, int toY) {
+        final View view = holder.itemView;
+        final int deltaX = toX - fromX;
+        final int deltaY = toY - fromY;
+        if (deltaX != 0) {
+            view.animate().translationX(0);
+        }
+        if (deltaY != 0) {
+            view.animate().translationY(0);
+        }
+        // TODO: make EndActions end listeners instead, since end actions aren't called when
+        // vpas are canceled (and can't end them. why?)
+        // need listener functionality in VPACompat for this. Ick.
+        final ViewPropertyAnimator animation = view.animate();
+        mMoveAnimations.add(holder);
+        animation.setDuration(getMoveDuration()).setListener(new AnimatorListenerAdapter() {
+            @Override
+            public void onAnimationStart(Animator animator) {
+                dispatchMoveStarting(holder);
+            }
+
+            @Override
+            public void onAnimationCancel(Animator animator) {
+                if (deltaX != 0) {
+                    view.setTranslationX(0);
+                }
+                if (deltaY != 0) {
+                    view.setTranslationY(0);
+                }
+            }
+
+            @Override
+            public void onAnimationEnd(Animator animator) {
+                animation.setListener(null);
+                dispatchMoveFinished(holder);
+                mMoveAnimations.remove(holder);
+                dispatchFinishedWhenDone();
+            }
+        }).start();
+    }
+
+    @Override
+    public boolean animateChange(ViewHolder oldHolder, ViewHolder newHolder,
+                                 int fromX, int fromY, int toX, int toY) {
+        if (oldHolder == newHolder) {
+            // Don't know how to run change animations when the same view holder is re-used.
+            // run a move animation to handle position changes.
+            return animateMove(oldHolder, fromX, fromY, toX, toY);
+        }
+        changeAnimation(oldHolder, newHolder,
+                fromX, fromY, toX, toY);
+        mPendingChanges.add(new ChangeInfo(oldHolder, newHolder, fromX, fromY, toX, toY));
+        return true;
+    }
+
+    void animateChangeImpl(final ChangeInfo changeInfo) {
+        final ViewHolder holder = changeInfo.oldHolder;
+        final View view = holder == null ? null : holder.itemView;
+        final ViewHolder newHolder = changeInfo.newHolder;
+        final View newView = newHolder != null ? newHolder.itemView : null;
+        if (view != null) {
+            final ViewPropertyAnimator oldViewAnim = changeOldAnimation(holder, changeInfo);
+            mChangeAnimations.add(changeInfo.oldHolder);
+            oldViewAnim.setListener(new AnimatorListenerAdapter() {
+                @Override
+                public void onAnimationStart(Animator animator) {
+                    dispatchChangeStarting(changeInfo.oldHolder, true);
+                }
+
+                @Override
+                public void onAnimationEnd(Animator animator) {
+                    oldViewAnim.setListener(null);
+                    changeAnimationCleanup(holder);
+                    view.setTranslationX(0);
+                    view.setTranslationY(0);
+                    dispatchChangeFinished(changeInfo.oldHolder, true);
+                    mChangeAnimations.remove(changeInfo.oldHolder);
+                    dispatchFinishedWhenDone();
+                }
+            }).start();
+        }
+        if (newView != null) {
+            final ViewPropertyAnimator newViewAnimation = changeNewAnimation(newHolder);
+            mChangeAnimations.add(changeInfo.newHolder);
+            newViewAnimation.setListener(new AnimatorListenerAdapter() {
+                @Override
+                public void onAnimationStart(Animator animator) {
+                    dispatchChangeStarting(changeInfo.newHolder, false);
+                }
+
+                @Override
+                public void onAnimationEnd(Animator animator) {
+                    newViewAnimation.setListener(null);
+                    changeAnimationCleanup(newHolder);
+                    newView.setTranslationX(0);
+                    newView.setTranslationY(0);
+                    dispatchChangeFinished(changeInfo.newHolder, false);
+                    mChangeAnimations.remove(changeInfo.newHolder);
+                    dispatchFinishedWhenDone();
+                }
+            }).start();
+        }
+    }
+
+    /**
+     * the whole change animation if we have to cross animate two views
+     *
+     * @param oldHolder
+     * @param newHolder
+     * @param fromX
+     * @param fromY
+     * @param toX
+     * @param toY
+     */
+    public void changeAnimation(ViewHolder oldHolder, ViewHolder newHolder, int fromX, int fromY, int toX, int toY) {
+        final float prevTranslationX = oldHolder.itemView.getTranslationX();
+        final float prevTranslationY = oldHolder.itemView.getTranslationY();
+        final float prevValue = oldHolder.itemView.getAlpha();
+        resetAnimation(oldHolder);
+        int deltaX = (int) (toX - fromX - prevTranslationX);
+        int deltaY = (int) (toY - fromY - prevTranslationY);
+        // recover prev translation state after ending animation
+        oldHolder.itemView.setTranslationX(prevTranslationX);
+        oldHolder.itemView.setTranslationY(prevTranslationY);
+
+        oldHolder.itemView.setAlpha(prevValue);
+        if (newHolder != null) {
+            // carry over translation values
+            resetAnimation(newHolder);
+            newHolder.itemView.setTranslationX(-deltaX);
+            newHolder.itemView.setTranslationY(-deltaY);
+            newHolder.itemView.setAlpha(0);
+        }
+    }
+
+    /**
+     * the animation for removing the old view
+     *
+     * @param holder
+     * @return
+     */
+    public abstract ViewPropertyAnimator changeOldAnimation(ViewHolder holder, ChangeInfo changeInfo);
+
+    /**
+     * the animation for changing the new view
+     *
+     * @param holder
+     * @return
+     */
+    public abstract ViewPropertyAnimator changeNewAnimation(ViewHolder holder);
+
+    /**
+     * the cleanup method if the animation needs to be stopped. and tro prepare for the next view
+     *
+     * @param holder
+     */
+    public abstract void changeAnimationCleanup(ViewHolder holder);
+
+    private void endChangeAnimation(List<ChangeInfo> infoList, ViewHolder item) {
+        for (int i = infoList.size() - 1; i >= 0; i--) {
+            ChangeInfo changeInfo = infoList.get(i);
+            if (endChangeAnimationIfNecessary(changeInfo, item)) {
+                if (changeInfo.oldHolder == null && changeInfo.newHolder == null) {
+                    infoList.remove(changeInfo);
+                }
+            }
+        }
+    }
+
+    private void endChangeAnimationIfNecessary(ChangeInfo changeInfo) {
+        if (changeInfo.oldHolder != null) {
+            endChangeAnimationIfNecessary(changeInfo, changeInfo.oldHolder);
+        }
+        if (changeInfo.newHolder != null) {
+            endChangeAnimationIfNecessary(changeInfo, changeInfo.newHolder);
+        }
+    }
+
+    private boolean endChangeAnimationIfNecessary(ChangeInfo changeInfo, ViewHolder item) {
+        boolean oldItem = false;
+        if (changeInfo.newHolder == item) {
+            changeInfo.newHolder = null;
+        } else if (changeInfo.oldHolder == item) {
+            changeInfo.oldHolder = null;
+            oldItem = true;
+        } else {
+            return false;
+        }
+        changeAnimationCleanup(item);
+        item.itemView.setTranslationX(0);
+        item.itemView.setTranslationY(0);
+        dispatchChangeFinished(item, oldItem);
+        return true;
+    }
+
+    @Override
+    public void endAnimation(ViewHolder item) {
+        final View view = item.itemView;
+        // this will trigger end callback which should set properties to their target values.
+        view.animate().cancel();
+        // TODO if some other animations are chained to end, how do we cancel them as well?
+        for (int i = mPendingMoves.size() - 1; i >= 0; i--) {
+            MoveInfo moveInfo = mPendingMoves.get(i);
+            if (moveInfo.holder == item) {
+                view.setTranslationY(0);
+                view.setTranslationX(0);
+                dispatchMoveFinished(item);
+                mPendingMoves.remove(i);
+            }
+        }
+        endChangeAnimation(mPendingChanges, item);
+        if (mPendingRemovals.remove(item)) {
+            removeAnimationCleanup(item);
+            dispatchRemoveFinished(item);
+        }
+        if (mPendingAdditions.remove(item)) {
+            addAnimationCleanup(item);
+            dispatchAddFinished(item);
+        }
+
+        for (int i = mChangesList.size() - 1; i >= 0; i--) {
+            ArrayList<ChangeInfo> changes = mChangesList.get(i);
+            endChangeAnimation(changes, item);
+            if (changes.isEmpty()) {
+                mChangesList.remove(i);
+            }
+        }
+        for (int i = mMovesList.size() - 1; i >= 0; i--) {
+            ArrayList<MoveInfo> moves = mMovesList.get(i);
+            for (int j = moves.size() - 1; j >= 0; j--) {
+                MoveInfo moveInfo = moves.get(j);
+                if (moveInfo.holder == item) {
+                    view.setTranslationY(0);
+                    view.setTranslationX(0);
+                    dispatchMoveFinished(item);
+                    moves.remove(j);
+                    if (moves.isEmpty()) {
+                        mMovesList.remove(i);
+                    }
+                    break;
+                }
+            }
+        }
+        for (int i = mAdditionsList.size() - 1; i >= 0; i--) {
+            ArrayList<ViewHolder> additions = mAdditionsList.get(i);
+            if (additions.remove(item)) {
+                addAnimationCleanup(item);
+                dispatchAddFinished(item);
+                if (additions.isEmpty()) {
+                    mAdditionsList.remove(i);
+                }
+            }
+        }
+
+        // animations should be ended by the cancel above.
+        //noinspection PointlessBooleanExpression,ConstantConditions
+        if (mRemoveAnimations.remove(item) && DEBUG) {
+            throw new IllegalStateException("after animation is cancelled, item should not be in "
+                    + "mRemoveAnimations list");
+        }
+
+        //noinspection PointlessBooleanExpression,ConstantConditions
+        if (mAddAnimations.remove(item) && DEBUG) {
+            throw new IllegalStateException("after animation is cancelled, item should not be in "
+                    + "mAddAnimations list");
+        }
+
+        //noinspection PointlessBooleanExpression,ConstantConditions
+        if (mChangeAnimations.remove(item) && DEBUG) {
+            throw new IllegalStateException("after animation is cancelled, item should not be in "
+                    + "mChangeAnimations list");
+        }
+
+        //noinspection PointlessBooleanExpression,ConstantConditions
+        if (mMoveAnimations.remove(item) && DEBUG) {
+            throw new IllegalStateException("after animation is cancelled, item should not be in "
+                    + "mMoveAnimations list");
+        }
+        dispatchFinishedWhenDone();
+    }
+
+    private void resetAnimation(ViewHolder holder) {
+
+        if (sDefaultInterpolator == null) {
+            sDefaultInterpolator = new ValueAnimator().getInterpolator();
+        }
+        holder.itemView.animate().setInterpolator(sDefaultInterpolator);
+        endAnimation(holder);
+    }
+
+    @Override
+    public boolean isRunning() {
+        return (!mPendingAdditions.isEmpty()
+                || !mPendingChanges.isEmpty()
+                || !mPendingMoves.isEmpty()
+                || !mPendingRemovals.isEmpty()
+                || !mMoveAnimations.isEmpty()
+                || !mRemoveAnimations.isEmpty()
+                || !mAddAnimations.isEmpty()
+                || !mChangeAnimations.isEmpty()
+                || !mMovesList.isEmpty()
+                || !mAdditionsList.isEmpty()
+                || !mChangesList.isEmpty());
+    }
+
+    /**
+     * Check the state of currently pending and running animations. If there are none
+     * pending/running, call {@link #dispatchAnimationsFinished()} to notify any
+     * listeners.
+     */
+    void dispatchFinishedWhenDone() {
+        if (!isRunning()) {
+            dispatchAnimationsFinished();
+        }
+    }
+
+    @Override
+    public void endAnimations() {
+        int count = mPendingMoves.size();
+        for (int i = count - 1; i >= 0; i--) {
+            MoveInfo item = mPendingMoves.get(i);
+            View view = item.holder.itemView;
+            view.setTranslationY(0);
+            view.setTranslationX(0);
+            dispatchMoveFinished(item.holder);
+            mPendingMoves.remove(i);
+        }
+        count = mPendingRemovals.size();
+        for (int i = count - 1; i >= 0; i--) {
+            ViewHolder item = mPendingRemovals.get(i);
+            dispatchRemoveFinished(item);
+            mPendingRemovals.remove(i);
+        }
+        count = mPendingAdditions.size();
+        for (int i = count - 1; i >= 0; i--) {
+            ViewHolder item = mPendingAdditions.get(i);
+            addAnimationCleanup(item);
+            dispatchAddFinished(item);
+            mPendingAdditions.remove(i);
+        }
+        count = mPendingChanges.size();
+        for (int i = count - 1; i >= 0; i--) {
+            endChangeAnimationIfNecessary(mPendingChanges.get(i));
+        }
+        mPendingChanges.clear();
+        if (!isRunning()) {
+            return;
+        }
+
+        int listCount = mMovesList.size();
+        for (int i = listCount - 1; i >= 0; i--) {
+            ArrayList<MoveInfo> moves = mMovesList.get(i);
+            count = moves.size();
+            for (int j = count - 1; j >= 0; j--) {
+                MoveInfo moveInfo = moves.get(j);
+                ViewHolder item = moveInfo.holder;
+                View view = item.itemView;
+                view.setTranslationY(0);
+                view.setTranslationX(0);
+                dispatchMoveFinished(moveInfo.holder);
+                moves.remove(j);
+                if (moves.isEmpty()) {
+                    mMovesList.remove(moves);
+                }
+            }
+        }
+        listCount = mAdditionsList.size();
+        for (int i = listCount - 1; i >= 0; i--) {
+            ArrayList<ViewHolder> additions = mAdditionsList.get(i);
+            count = additions.size();
+            for (int j = count - 1; j >= 0; j--) {
+                ViewHolder item = additions.get(j);
+                View view = item.itemView;
+                addAnimationCleanup(item);
+                dispatchAddFinished(item);
+                additions.remove(j);
+                if (additions.isEmpty()) {
+                    mAdditionsList.remove(additions);
+                }
+            }
+        }
+        listCount = mChangesList.size();
+        for (int i = listCount - 1; i >= 0; i--) {
+            ArrayList<ChangeInfo> changes = mChangesList.get(i);
+            count = changes.size();
+            for (int j = count - 1; j >= 0; j--) {
+                endChangeAnimationIfNecessary(changes.get(j));
+                if (changes.isEmpty()) {
+                    mChangesList.remove(changes);
+                }
+            }
+        }
+
+        cancelAll(mRemoveAnimations);
+        cancelAll(mMoveAnimations);
+        cancelAll(mAddAnimations);
+        cancelAll(mChangeAnimations);
+
+        dispatchAnimationsFinished();
+    }
+
+    void cancelAll(List<ViewHolder> viewHolders) {
+        for (int i = viewHolders.size() - 1; i >= 0; i--) {
+            viewHolders.get(i).itemView.animate().cancel();
+        }
+    }
+
+    /**
+     * {@inheritDoc}
+     * <p>
+     * If the payload list is not empty, DefaultItemAnimator returns <code>true</code>.
+     * When this is the case:
+     * <ul>
+     * <li>If you override {@link #animateChange(ViewHolder, ViewHolder, int, int, int, int)}, both
+     * ViewHolder arguments will be the same instance.
+     * </li>
+     * <li>
+     * If you are not overriding {@link #animateChange(ViewHolder, ViewHolder, int, int, int, int)},
+     * then DefaultItemAnimator will call {@link #animateMove(ViewHolder, int, int, int, int)} and
+     * run a move animation instead.
+     * </li>
+     * </ul>
+     */
+    @Override
+    public boolean canReuseUpdatedViewHolder(@NonNull ViewHolder viewHolder,
+                                             @NonNull List<Object> payloads) {
+        return !payloads.isEmpty() || super.canReuseUpdatedViewHolder(viewHolder, payloads);
+    }
+}
diff --git a/adapter/src/main/kotlin/ca/allanwang/kau/animators/BaseSlideAlphaAnimator.kt b/adapter/src/main/kotlin/ca/allanwang/kau/animators/BaseSlideAlphaAnimator.kt
new file mode 100644
index 0000000..a963358
--- /dev/null
+++ b/adapter/src/main/kotlin/ca/allanwang/kau/animators/BaseSlideAlphaAnimator.kt
@@ -0,0 +1,52 @@
+package ca.allanwang.kau.animators
+
+import android.support.v7.widget.RecyclerView
+import android.view.ViewPropertyAnimator
+
+/**
+ * Created by Allan Wang on 2017-06-27.
+ *
+ * Base for sliding animators
+ * item delay factor by default can be 0.125f
+ */
+abstract class BaseSlideAlphaAnimator(itemDelayFactor: Float) : BaseDelayAnimator(itemDelayFactor) {
+
+    override fun addAnimation(holder: RecyclerView.ViewHolder): ViewPropertyAnimator {
+        return super.addAnimation(holder).apply {
+            translationY(0f)
+            translationX(0f)
+            alpha(1f)
+        }
+    }
+
+    final override fun addAnimationCleanup(holder: RecyclerView.ViewHolder) {
+        with(holder.itemView) {
+            translationY = 0f
+            translationX = 0f
+            alpha = 1f
+        }
+    }
+
+    override fun getAddDelay(remove: Long, move: Long, change: Long): Long = 0
+
+    override fun getRemoveDelay(remove: Long, move: Long, change: Long): Long = 0
+
+    /**
+     * Partial removal animation
+     * As of now, all it does it change the alpha
+     * To have it slide, add onto it in a sub class
+     */
+    override fun removeAnimation(holder: RecyclerView.ViewHolder): ViewPropertyAnimator {
+        return super.addAnimation(holder).apply {
+            alpha(0f)
+        }
+    }
+
+    override final fun removeAnimationCleanup(holder: RecyclerView.ViewHolder) {
+        with(holder.itemView) {
+            translationY = 0f
+            translationX = 0f
+            alpha = 1f
+        }
+    }
+}
\ No newline at end of file
diff --git a/adapter/src/main/kotlin/ca/allanwang/kau/animators/DefaultAnimator.kt b/adapter/src/main/kotlin/ca/allanwang/kau/animators/DefaultAnimator.kt
new file mode 100644
index 0000000..9aeafde
--- /dev/null
+++ b/adapter/src/main/kotlin/ca/allanwang/kau/animators/DefaultAnimator.kt
@@ -0,0 +1,63 @@
+package ca.allanwang.kau.animators
+
+import android.support.v7.widget.RecyclerView
+import android.view.ViewPropertyAnimator
+
+/**
+ * Created by Allan Wang on 2017-06-27.
+ */
+open class DefaultAnimator : BaseItemAnimator() {
+
+    override fun removeAnimation(holder: RecyclerView.ViewHolder): ViewPropertyAnimator {
+        return holder.itemView.animate().apply {
+            alpha(0f)
+            duration = this@DefaultAnimator.removeDuration
+            interpolator = this@DefaultAnimator.interpolator
+        }
+    }
+
+    override fun removeAnimationCleanup(holder: RecyclerView.ViewHolder) {
+        holder.itemView.alpha = 1f
+    }
+
+    override fun addAnimationPrepare(holder: RecyclerView.ViewHolder) {
+        holder.itemView.alpha = 0f
+    }
+
+    override fun addAnimation(holder: RecyclerView.ViewHolder): ViewPropertyAnimator {
+        return holder.itemView.animate().apply {
+            alpha(1f)
+            duration = this@DefaultAnimator.addDuration
+            interpolator = this@DefaultAnimator.interpolator
+        }
+    }
+
+    override fun addAnimationCleanup(holder: RecyclerView.ViewHolder) {
+        holder.itemView.alpha = 1f
+    }
+
+    override fun changeOldAnimation(holder: RecyclerView.ViewHolder, changeInfo: ChangeInfo): ViewPropertyAnimator {
+        return holder.itemView.animate().apply {
+            alpha(0f)
+            translationX(changeInfo.toX.toFloat() - changeInfo.fromX)
+            translationY(changeInfo.toY.toFloat() - changeInfo.fromY)
+            duration = this@DefaultAnimator.changeDuration
+            interpolator = this@DefaultAnimator.interpolator
+        }
+    }
+
+    override fun changeNewAnimation(holder: RecyclerView.ViewHolder): ViewPropertyAnimator {
+        return holder.itemView.animate().apply {
+            alpha(1f)
+            translationX(0f)
+            translationY(0f)
+            duration = this@DefaultAnimator.changeDuration
+            interpolator = this@DefaultAnimator.interpolator
+        }
+    }
+
+    override fun changeAnimationCleanup(holder: RecyclerView.ViewHolder) {
+        holder.itemView.alpha = 1f
+    }
+
+}
\ No newline at end of file
diff --git a/adapter/src/main/kotlin/ca/allanwang/kau/animators/FadeScaleAnimator.kt b/adapter/src/main/kotlin/ca/allanwang/kau/animators/FadeScaleAnimator.kt
new file mode 100644
index 0000000..e968cda
--- /dev/null
+++ b/adapter/src/main/kotlin/ca/allanwang/kau/animators/FadeScaleAnimator.kt
@@ -0,0 +1,51 @@
+package ca.allanwang.kau.animators
+
+import android.support.v7.widget.RecyclerView
+import android.view.ViewPropertyAnimator
+
+/**
+ * Created by Allan Wang on 2017-06-29.
+ */
+open class FadeScaleAnimator(val scaleFactor: Float = 0.7f, itemDelayFactor: Float = 0.125f) : BaseDelayAnimator(itemDelayFactor) {
+
+    override fun addAnimationPrepare(holder: RecyclerView.ViewHolder) {
+        with(holder.itemView) {
+            scaleX = scaleFactor
+            scaleY = scaleFactor
+            alpha = 0f
+        }
+    }
+
+    override final fun addAnimation(holder: RecyclerView.ViewHolder): ViewPropertyAnimator {
+        return super.addAnimation(holder).apply {
+            scaleX(1f)
+            scaleY(1f)
+            alpha(1f)
+        }
+    }
+
+
+    final override fun addAnimationCleanup(holder: RecyclerView.ViewHolder) {
+        with(holder.itemView) {
+            scaleX = 1f
+            scaleY = 1f
+            alpha = 1f
+        }
+    }
+
+    override fun removeAnimation(holder: RecyclerView.ViewHolder): ViewPropertyAnimator {
+        return super.removeAnimation(holder).apply {
+            scaleX(scaleFactor)
+            scaleY(scaleFactor)
+            alpha(0f)
+        }
+    }
+
+    override final fun removeAnimationCleanup(holder: RecyclerView.ViewHolder) {
+        with(holder.itemView) {
+            translationY = 0f
+            translationX = 0f
+            alpha = 1f
+        }
+    }
+}
\ No newline at end of file
diff --git a/adapter/src/main/kotlin/ca/allanwang/kau/animators/NoAnimator.kt b/adapter/src/main/kotlin/ca/allanwang/kau/animators/NoAnimator.kt
new file mode 100644
index 0000000..244287b
--- /dev/null
+++ b/adapter/src/main/kotlin/ca/allanwang/kau/animators/NoAnimator.kt
@@ -0,0 +1,41 @@
+package ca.allanwang.kau.animators
+
+import android.support.v7.widget.RecyclerView
+import android.view.ViewPropertyAnimator
+
+/**
+ * Created by Allan Wang on 2017-06-27.
+ *
+ * Truly have no animation
+ */
+class NoAnimator : DefaultAnimator() {
+    override fun addAnimationPrepare(holder: RecyclerView.ViewHolder) {}
+
+    override fun addAnimation(holder: RecyclerView.ViewHolder): ViewPropertyAnimator = holder.itemView.animate().apply { duration = 0 }
+
+    override fun addAnimationCleanup(holder: RecyclerView.ViewHolder) {}
+
+    override fun changeOldAnimation(holder: RecyclerView.ViewHolder, changeInfo: ChangeInfo): ViewPropertyAnimator = holder.itemView.animate().apply { duration = 0 }
+
+    override fun changeNewAnimation(holder: RecyclerView.ViewHolder): ViewPropertyAnimator = holder.itemView.animate().apply { duration = 0 }
+
+    override fun changeAnimationCleanup(holder: RecyclerView.ViewHolder) {}
+
+    override fun changeAnimation(oldHolder: RecyclerView.ViewHolder, newHolder: RecyclerView.ViewHolder?, fromX: Int, fromY: Int, toX: Int, toY: Int) {}
+
+    override fun getAddDelay(remove: Long, move: Long, change: Long): Long = 0
+
+    override fun getAddDuration(): Long = 0
+
+    override fun getMoveDuration(): Long = 0
+
+    override fun getRemoveDuration(): Long = 0
+
+    override fun getChangeDuration(): Long = 0
+
+    override fun getRemoveDelay(remove: Long, move: Long, change: Long): Long = 0
+
+    override fun removeAnimation(holder: RecyclerView.ViewHolder): ViewPropertyAnimator = holder.itemView.animate().apply { duration = 0 }
+
+    override fun removeAnimationCleanup(holder: RecyclerView.ViewHolder) {}
+}
\ No newline at end of file
diff --git a/adapter/src/main/kotlin/ca/allanwang/kau/animators/SlideUpExitRightAnimator.kt b/adapter/src/main/kotlin/ca/allanwang/kau/animators/SlideUpExitRightAnimator.kt
new file mode 100644
index 0000000..8670493
--- /dev/null
+++ b/adapter/src/main/kotlin/ca/allanwang/kau/animators/SlideUpExitRightAnimator.kt
@@ -0,0 +1,23 @@
+package ca.allanwang.kau.animators
+
+import android.support.v7.widget.RecyclerView
+import android.view.ViewPropertyAnimator
+
+/**
+ * Created by Allan Wang on 2017-06-27.
+ */
+class SlideUpExitRightAnimator(itemDelayFactor: Float = 0.125f) : BaseSlideAlphaAnimator(itemDelayFactor) {
+
+    override fun addAnimationPrepare(holder: RecyclerView.ViewHolder) {
+        with(holder.itemView) {
+            translationY = height.toFloat()
+            alpha = 0f
+        }
+    }
+
+    override fun removeAnimation(holder: RecyclerView.ViewHolder): ViewPropertyAnimator {
+        return super.removeAnimation(holder).apply {
+            translationX(holder.itemView.width.toFloat())
+        }
+    }
+}
\ No newline at end of file
diff --git a/adapter/src/main/kotlin/ca/allanwang/kau/iitems/CardIItem.kt b/adapter/src/main/kotlin/ca/allanwang/kau/iitems/CardIItem.kt
new file mode 100644
index 0000000..3380ade
--- /dev/null
+++ b/adapter/src/main/kotlin/ca/allanwang/kau/iitems/CardIItem.kt
@@ -0,0 +1,127 @@
+package ca.allanwang.kau.iitems
+
+import android.graphics.Color
+import android.graphics.drawable.Drawable
+import android.support.v7.widget.CardView
+import android.support.v7.widget.RecyclerView
+import android.view.View
+import android.widget.Button
+import android.widget.ImageView
+import android.widget.LinearLayout
+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.*
+import com.mikepenz.fastadapter.FastAdapter
+import com.mikepenz.fastadapter.IItem
+import com.mikepenz.fastadapter.items.AbstractItem
+import com.mikepenz.fastadapter.listeners.ClickEventHook
+import com.mikepenz.iconics.typeface.IIcon
+
+/**
+ * Created by Allan Wang on 2017-06-28.
+ *
+ * Simple generic card item with an icon, title, description and button
+ * The icon and button are hidden by default unless values are given
+ */
+class CardIItem(val builder: Config.() -> Unit = {}
+) : AbstractItem<CardIItem, CardIItem.ViewHolder>(), ThemableIItem by ThemableIItemDelegate() {
+
+    companion object {
+        @JvmStatic fun bindClickEvents(fastAdapter: FastAdapter<IItem<*,*>>) {
+            fastAdapter.withEventHook(object : ClickEventHook<IItem<*,*>>() {
+                override fun onBindMany(viewHolder: RecyclerView.ViewHolder): List<View>? {
+                    return if (viewHolder is ViewHolder) listOf(viewHolder.card, viewHolder.button) else null
+                }
+
+                override fun onClick(v: View, position: Int, adapter: FastAdapter<IItem<*,*>>, item: IItem<*,*>) {
+                    if (item !is CardIItem) return
+                    with(item.configs) {
+                        when (v.id) {
+                            R.id.kau_card_container -> cardClick?.onClick(v)
+                            R.id.kau_card_button -> buttonClick?.onClick(v)
+                            else -> {
+                            }
+                        }
+                    }
+                }
+            })
+        }
+    }
+
+    val configs = Config().apply { builder() }
+
+    class Config {
+        var title: String? = null
+        var titleRes: Int = -1
+        var desc: String? = null
+        var descRes: Int = -1
+        var button: String? = null
+        var buttonRes: Int = -1
+        var buttonClick: View.OnClickListener? = null
+        var cardClick: View.OnClickListener? = null
+        var image: Drawable? = null
+        var imageIIcon: IIcon? = null
+        var imageIIconColor: Int = Color.WHITE
+        var imageRes: Int = -1
+    }
+
+
+    override fun getType(): Int = R.id.kau_item_card
+
+    override fun getLayoutRes(): Int = R.layout.kau_iitem_card
+
+    override fun bindView(holder: ViewHolder, payloads: MutableList<Any>?) {
+        super.bindView(holder, payloads)
+        with(holder.itemView.context) context@ {
+            with(configs) {
+                holder.title.text = string(titleRes, title)
+                holder.description.text = string(descRes, desc)
+                val buttonText = string(buttonRes, button)
+                if (buttonText != null) {
+                    holder.bottomRow.visible()
+                    holder.button.text = buttonText
+                    holder.button.setOnClickListener(buttonClick)
+                }
+                holder.icon.setImageDrawable(
+                        if (imageRes > 0) drawable(imageRes)
+                        else if (imageIIcon != null) imageIIcon!!.toDrawable(this@context, sizeDp = 40, color = imageIIconColor)
+                        else image
+                )
+                holder.card.setOnClickListener(cardClick)
+            }
+            with(holder) {
+                bindTextColor(title)
+                bindTextColorSecondary(description)
+                bindAccentColor(button)
+                if (configs.imageIIcon != null) bindIconColor(icon)
+                bindBackgroundRipple(card)
+            }
+        }
+    }
+
+    override fun unbindView(holder: ViewHolder) {
+        super.unbindView(holder)
+        with(holder) {
+            icon.gone().setImageDrawable(null)
+            title.text = null
+            description.text = null
+            bottomRow.gone()
+            button.setOnClickListener(null)
+            card.setOnClickListener(null)
+        }
+    }
+
+    override fun getViewHolder(v: View): ViewHolder = ViewHolder(v)
+
+    class ViewHolder(v: View) : RecyclerView.ViewHolder(v) {
+        val card: CardView by bindView(R.id.kau_card_container)
+        val icon: ImageView by bindView(R.id.kau_card_image)
+        val title: TextView by bindView(R.id.kau_card_title)
+        val description: TextView by bindView(R.id.kau_card_description)
+        val bottomRow: LinearLayout by bindView(R.id.kau_card_bottom_row)
+        val button: Button by bindView(R.id.kau_card_button)
+    }
+
+}
\ No newline at end of file
diff --git a/adapter/src/main/kotlin/ca/allanwang/kau/iitems/HeaderIItem.kt b/adapter/src/main/kotlin/ca/allanwang/kau/iitems/HeaderIItem.kt
new file mode 100644
index 0000000..e994781
--- /dev/null
+++ b/adapter/src/main/kotlin/ca/allanwang/kau/iitems/HeaderIItem.kt
@@ -0,0 +1,49 @@
+package ca.allanwang.kau.iitems
+
+import android.support.v7.widget.CardView
+import android.support.v7.widget.RecyclerView
+import android.view.View
+import android.view.ViewGroup
+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.string
+import com.mikepenz.fastadapter.items.AbstractItem
+
+/**
+ * Created by Allan Wang on 2017-06-28.
+ *
+ * Simple Header with lots of padding on the top
+ * Contains only one text view
+ */
+class HeaderIItem(text: String? = null, var textRes: Int = -1
+) : AbstractItem<HeaderIItem, HeaderIItem.ViewHolder>(), ThemableIItem by ThemableIItemDelegate() {
+
+    var text: String = text ?: "Header Placeholder"
+
+    override fun getType(): Int = R.id.kau_item_header_big_margin_top
+
+    override fun getLayoutRes(): Int = R.layout.kau_iitem_header
+
+    override fun bindView(holder: ViewHolder, payloads: MutableList<Any>?) {
+        super.bindView(holder, payloads)
+        holder.text.text = holder.itemView.context.string(textRes, text)
+        bindTextColor(holder.text)
+        bindBackgroundColor(holder.container)
+    }
+
+    override fun unbindView(holder: ViewHolder) {
+        super.unbindView(holder)
+        holder.text.text = null
+    }
+
+    override fun getViewHolder(v: View): ViewHolder = ViewHolder(v)
+
+    class ViewHolder(v: View) : RecyclerView.ViewHolder(v) {
+        val text: TextView by bindView(R.id.kau_header_text)
+        val container: CardView by bindView(R.id.kau_header_container)
+    }
+
+}
\ No newline at end of file
diff --git a/adapter/src/main/kotlin/ca/allanwang/kau/iitems/KauIItem.kt b/adapter/src/main/kotlin/ca/allanwang/kau/iitems/KauIItem.kt
new file mode 100644
index 0000000..d8567c4
--- /dev/null
+++ b/adapter/src/main/kotlin/ca/allanwang/kau/iitems/KauIItem.kt
@@ -0,0 +1,24 @@
+package ca.allanwang.kau.iitems
+
+import android.support.annotation.LayoutRes
+import android.support.v7.widget.RecyclerView
+import android.view.View
+import com.mikepenz.fastadapter.IClickable
+import com.mikepenz.fastadapter.IItem
+import com.mikepenz.fastadapter.items.AbstractItem
+
+/**
+ * Created by Allan Wang on 2017-07-03.
+ *
+ * Kotlin implementation of the [AbstractItem] to make things shorter
+ * If only one iitem type extends the given [layoutRes], you may use it as the type and not worry about another id
+ */
+open class KauIItem<Item, VH : RecyclerView.ViewHolder>(
+        @param:LayoutRes private val layoutRes: Int,
+        private val viewHolder: (v: View) -> VH,
+        private val type: Int = layoutRes
+) : AbstractItem<Item, VH>() where Item : IItem<*, *>, Item : IClickable<*> {
+    override final fun getType(): Int = type
+    override final fun getViewHolder(v: View): VH = viewHolder(v)
+    override final fun getLayoutRes(): Int = layoutRes
+}
\ No newline at end of file
diff --git a/adapter/src/main/res/layout/kau_iitem_card.xml b/adapter/src/main/res/layout/kau_iitem_card.xml
new file mode 100644
index 0000000..621da2e
--- /dev/null
+++ b/adapter/src/main/res/layout/kau_iitem_card.xml
@@ -0,0 +1,79 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+    Generic card with an imageview, title, description, and button
+  -->
+<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/kau_card_container"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:layout_marginBottom="@dimen/kau_padding_normal"
+    android:background="?android:selectableItemBackground"
+    android:minHeight="?android:listPreferredItemHeight">
+
+    <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:paddingTop="@dimen/kau_padding_normal">
+
+        <ImageView
+            android:id="@+id/kau_card_image"
+            android:layout_width="@dimen/kau_avatar_bounds"
+            android:layout_height="@dimen/kau_avatar_bounds"
+            android:layout_marginEnd="@dimen/kau_avatar_margin"
+            android:layout_marginStart="@dimen/kau_avatar_margin"
+            android:padding="@dimen/kau_avatar_padding"
+            android:scaleType="fitCenter"
+            android:visibility="gone"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent" />
+
+
+        <TextView
+            android:id="@+id/kau_card_title"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:textAppearance="@style/TextAppearance.AppCompat.Subhead"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toEndOf="@id/kau_card_image"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_goneMarginStart="@dimen/kau_padding_normal" />
+
+        <TextView
+            android:id="@+id/kau_card_description"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:textAppearance="@style/TextAppearance.AppCompat.Body1"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toEndOf="@id/kau_card_image"
+            app:layout_constraintTop_toBottomOf="@id/kau_card_title"
+            app:layout_goneMarginStart="@dimen/kau_padding_normal" />
+
+        <LinearLayout
+            android:id="@+id/kau_card_bottom_row"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal"
+            android:visibility="gone"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toEndOf="@id/kau_card_image"
+            app:layout_constraintTop_toBottomOf="@id/kau_card_description"
+            app:layout_goneMarginStart="@dimen/kau_padding_normal">
+
+            <Button
+                android:id="@+id/kau_card_button"
+                style="?android:borderlessButtonStyle"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginStart="@dimen/kau_spacing_normal"
+                android:textColor="?attr/colorAccent" />
+
+        </LinearLayout>
+
+    </android.support.constraint.ConstraintLayout>
+
+</android.support.v7.widget.CardView>
diff --git a/adapter/src/main/res/layout/kau_iitem_header.xml b/adapter/src/main/res/layout/kau_iitem_header.xml
new file mode 100644
index 0000000..fa5a595
--- /dev/null
+++ b/adapter/src/main/res/layout/kau_iitem_header.xml
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/kau_header_container"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:layout_marginBottom="@dimen/kau_padding_normal"
+    android:orientation="vertical">
+
+    <TextView
+        android:id="@+id/kau_header_text"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="@dimen/kau_spacing_xlarge"
+        android:padding="@dimen/kau_padding_normal"
+        android:textAppearance="@style/TextAppearance.AppCompat.Body1" />
+
+</android.support.v7.widget.CardView>
\ No newline at end of file
diff --git a/adapter/src/main/res/values/dimens.xml b/adapter/src/main/res/values/dimens.xml
new file mode 100644
index 0000000..193940e
--- /dev/null
+++ b/adapter/src/main/res/values/dimens.xml
@@ -0,0 +1,3 @@
+<resources>
+    <dimen name="kau_color_circle_size">56dp</dimen>
+</resources>
diff --git a/adapter/src/test/java/ca/allanwang/kau/adapter/ExampleUnitTest.java b/adapter/src/test/java/ca/allanwang/kau/adapter/ExampleUnitTest.java
new file mode 100644
index 0000000..5684bab
--- /dev/null
+++ b/adapter/src/test/java/ca/allanwang/kau/adapter/ExampleUnitTest.java
@@ -0,0 +1,17 @@
+package ca.allanwang.kau.adapter;
+
+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