Add a simple SnackBar that doesn't rely on AppCompat

Issue-id: CYNGNOS-1611

Change-Id: If79aef79de4de12faecc64bad7c7f7d385a86043

10 files changed, 1064 insertions, 0 deletions

diff --git a/res/drawable/snackbar_background.xml b/res/drawable/snackbar_background.xml
new file mode 100644
index 0000000..739b516
--- /dev/null
+++ b/res/drawable/snackbar_background.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2015 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.
+  -->
+
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+       android:shape="rectangle">
+    <corners android:radius="@dimen/snackbar_background_corner_radius"/>
+    <solid android:color="@color/snackbar_background_color"/>
+</shape>
\ No newline at end of file
diff --git a/res/layout-sw600dp/layout_snackbar.xml b/res/layout-sw600dp/layout_snackbar.xml
new file mode 100644
index 0000000..797684f
--- /dev/null
+++ b/res/layout-sw600dp/layout_snackbar.xml
@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2015 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.
+-->
+
+<view xmlns:android="http://schemas.android.com/apk/res/android"
+      class="com.cyngn.uicommon.view.Snackbar$SnackbarLayout"
+      android:layout_width="wrap_content"
+      android:layout_height="wrap_content"
+      android:layout_gravity="bottom|center_horizontal"
+      style="@style/Widget.Snackbar">
+    <TextView
+        android:id="@+id/snackbar_text"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_weight="1"
+        android:paddingTop="@dimen/snackbar_padding_vertical"
+        android:paddingBottom="@dimen/snackbar_padding_vertical"
+        android:paddingLeft="@dimen/snackbar_padding_horizontal"
+        android:paddingRight="@dimen/snackbar_padding_horizontal"
+        android:textAppearance="@style/TextAppearance.Snackbar.Message"
+        android:maxLines="@integer/config_snackbar_text_max_lines"
+        android:layout_gravity="center_vertical|left|start"
+        android:ellipsize="end"/>
+
+    <Button
+        android:id="@+id/snackbar_action"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginLeft="@dimen/snackbar_extra_spacing_horizontal"
+        android:layout_marginStart="@dimen/snackbar_extra_spacing_horizontal"
+        android:layout_gravity="center_vertical|right|end"
+        android:paddingTop="@dimen/snackbar_padding_vertical"
+        android:paddingBottom="@dimen/snackbar_padding_vertical"
+        android:paddingLeft="@dimen/snackbar_padding_horizontal"
+        android:paddingRight="@dimen/snackbar_padding_horizontal"
+        android:visibility="gone"
+        android:textColor="?android:attr/colorAccent"
+        style="?android:attr/borderlessButtonStyle"/>
+</view>
\ No newline at end of file
diff --git a/res/layout/layout_snackbar.xml b/res/layout/layout_snackbar.xml
new file mode 100644
index 0000000..8c266b1
--- /dev/null
+++ b/res/layout/layout_snackbar.xml
@@ -0,0 +1,53 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2015 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.
+-->
+
+<view xmlns:android="http://schemas.android.com/apk/res/android"
+      class="com.cyngn.uicommon.view.Snackbar$SnackbarLayout"
+      android:layout_width="match_parent"
+      android:layout_height="wrap_content"
+      android:layout_gravity="bottom"
+      style="@style/Widget.Snackbar">
+
+    <TextView
+        android:id="@+id/snackbar_text"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_weight="1"
+        android:paddingTop="@dimen/snackbar_padding_vertical"
+        android:paddingBottom="@dimen/snackbar_padding_vertical"
+        android:paddingLeft="@dimen/snackbar_padding_horizontal"
+        android:paddingRight="@dimen/snackbar_padding_horizontal"
+        android:textAppearance="@style/TextAppearance.Snackbar.Message"
+        android:maxLines="@integer/config_snackbar_text_max_lines"
+        android:layout_gravity="center_vertical|left|start"
+        android:ellipsize="end"/>
+
+    <Button
+        android:id="@+id/snackbar_action"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginLeft="@dimen/snackbar_extra_spacing_horizontal"
+        android:layout_marginStart="@dimen/snackbar_extra_spacing_horizontal"
+        android:layout_gravity="center_vertical|right|end"
+        android:paddingTop="@dimen/snackbar_padding_vertical"
+        android:paddingBottom="@dimen/snackbar_padding_vertical"
+        android:paddingLeft="@dimen/snackbar_padding_horizontal"
+        android:paddingRight="@dimen/snackbar_padding_horizontal"
+        android:visibility="gone"
+        android:textColor="?android:attr/colorAccent"
+        style="?android:attr/borderlessButtonStyle"/>
+</view>
\ No newline at end of file
diff --git a/res/values/attrs.xml b/res/values/attrs.xml
index a06b05c..aaf224a 100644
--- a/res/values/attrs.xml
+++ b/res/values/attrs.xml
@@ -35,4 +35,10 @@
 
         </attr>
     </declare-styleable>
+
+    <declare-styleable name="SnackbarLayout">
+        <attr name="android:maxWidth" />
+        <attr name="android:elevation" />
+        <attr name="maxActionInlineWidth" format="dimension"/>
+    </declare-styleable>
 </resources>
diff --git a/res/values/colors.xml b/res/values/colors.xml
index 0f55373..cb321b9 100644
--- a/res/values/colors.xml
+++ b/res/values/colors.xml
@@ -2,4 +2,6 @@
     <color name="expanding_card_color">#f5f5f5</color>
     <color name="expanding_card_selected_color">#ffffff</color>
     <color name="expanding_card_start_gradient">#fafafa</color>
+    <color name="snackbar_background_color">#323232</color>
+    <color name="snackbar_background_color">#323232</color>
 </resources>
\ No newline at end of file
diff --git a/res/values/config.xml b/res/values/config.xml
new file mode 100644
index 0000000..205362c
--- /dev/null
+++ b/res/values/config.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright (C) 2015 The CyanogenMod 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.
+-->
+<resources>
+    <integer name="config_snackbar_text_max_lines">2</integer>
+</resources>
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
index 4d10050..3e52c4f 100644
--- a/res/values/dimens.xml
+++ b/res/values/dimens.xml
@@ -1,4 +1,21 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
     <dimen name="expanding_card_elevation">5dp</dimen>
+
+    <dimen name="snackbar_min_width">-1px</dimen>
+    <dimen name="snackbar_max_width">-1px</dimen>
+    <dimen name="snackbar_elevation">6dp</dimen>
+    <dimen name="snackbar_background_corner_radius">0dp</dimen>
+
+    <dimen name="snackbar_padding_horizontal">12dp</dimen>
+    <dimen name="snackbar_padding_vertical">14dp</dimen>
+    <dimen name="snackbar_padding_vertical_2lines">24dp</dimen>
+
+    <!-- Extra spacing between the action and message views -->
+    <dimen name="snackbar_extra_spacing_horizontal">0dp</dimen>
+    <!-- The maximum width for a Snackbar's inline action. If the view is width than this then
+         the Snackbar will change to vertical stacking -->
+    <dimen name="snackbar_action_inline_max_width">128dp</dimen>
+
+    <dimen name="snackbar_text_size">14sp</dimen>
 </resources>
diff --git a/res/values/styles.xml b/res/values/styles.xml
new file mode 100644
index 0000000..aee04d1
--- /dev/null
+++ b/res/values/styles.xml
@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2015 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.
+-->
+<resources>
+
+    <style name="TextAppearance.Snackbar.Message" parent="android:TextAppearance">
+        <item name="android:textSize">@dimen/snackbar_text_size</item>
+        <item name="android:textColor">?android:textColorPrimary</item>
+    </style>
+
+    <style name="Widget.Snackbar" parent="android:Widget">
+        <item name="android:theme">@android:style/Theme.Material</item>
+        <item name="android:minWidth">@dimen/snackbar_min_width</item>
+        <item name="android:maxWidth">@dimen/snackbar_max_width</item>
+        <item name="android:background">@drawable/snackbar_background</item>
+        <item name="android:paddingLeft">@dimen/snackbar_padding_horizontal</item>
+        <item name="android:paddingRight">@dimen/snackbar_padding_horizontal</item>
+        <item name="android:elevation">@dimen/snackbar_elevation</item>
+        <item name="maxActionInlineWidth">@dimen/snackbar_action_inline_max_width</item>
+    </style>
+
+</resources>
+
diff --git a/src/com/cyngn/uicommon/view/Snackbar.java b/src/com/cyngn/uicommon/view/Snackbar.java
new file mode 100644
index 0000000..d8779a5
--- /dev/null
+++ b/src/com/cyngn/uicommon/view/Snackbar.java
@@ -0,0 +1,631 @@
+/*
+ * Copyright (C) 2015 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.
+ */
+
+package com.cyngn.uicommon.view;
+
+import android.animation.Animator;
+import android.content.Context;
+import android.content.res.ColorStateList;
+import android.content.res.TypedArray;
+import android.os.Handler;
+import android.os.Looper;
+import android.os.Message;
+import android.support.v4.view.animation.FastOutSlowInInterpolator;
+import android.text.TextUtils;
+import android.util.AttributeSet;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.ViewParent;
+import android.view.animation.Interpolator;
+import android.widget.Button;
+import android.widget.FrameLayout;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+import com.cyngn.uicommon.R;
+
+/**
+ * Snackbars provide lightweight feedback about an operation. They show a brief message at the
+ * bottom of the screen on mobile and lower left on larger devices. Snackbars appear above all other
+ * elements on screen and only one can be displayed at a time.
+ * <p>
+ * They automatically disappear after a timeout or after user interaction elsewhere on the screen,
+ * particularly after interactions that summon a new surface or activity. Snackbars can be swiped
+ * off screen.
+ * <p>
+ * Snackbars can contain an action which is set via
+ * {@link #setAction(CharSequence, View.OnClickListener)}.
+ * <p>
+ * To be notified when a snackbar has been shown or dismissed, you can provide a {@link Callback}
+ * via {@link #setCallback(Callback)}.</p>
+ */
+public final class Snackbar {
+
+    private static final Interpolator FAST_OUT_SLOW_IN_INTERPOLATOR =
+            new FastOutSlowInInterpolator();
+
+    /**
+     * Callback class for {@link Snackbar} instances.
+     *
+     * @see Snackbar#setCallback(Callback)
+     */
+    public static abstract class Callback {
+        /** Indicates that the Snackbar was dismissed via a swipe.*/
+        public static final int DISMISS_EVENT_SWIPE = 0;
+        /** Indicates that the Snackbar was dismissed via an action click.*/
+        public static final int DISMISS_EVENT_ACTION = 1;
+        /** Indicates that the Snackbar was dismissed via a timeout.*/
+        public static final int DISMISS_EVENT_TIMEOUT = 2;
+        /** Indicates that the Snackbar was dismissed via a call to {@link #dismiss()}.*/
+        public static final int DISMISS_EVENT_MANUAL = 3;
+        /** Indicates that the Snackbar was dismissed from a new Snackbar being shown.*/
+        public static final int DISMISS_EVENT_CONSECUTIVE = 4;
+
+        /** @hide */
+        @Retention(RetentionPolicy.SOURCE)
+        public @interface DismissEvent {}
+
+        /**
+         * Called when the given {@link Snackbar} has been dismissed, either through a time-out,
+         * having been manually dismissed, or an action being clicked.
+         *
+         * @param snackbar The snackbar which has been dismissed.
+         * @param event The event which caused the dismissal. One of either:
+         *              {@link #DISMISS_EVENT_SWIPE}, {@link #DISMISS_EVENT_ACTION},
+         *              {@link #DISMISS_EVENT_TIMEOUT}, {@link #DISMISS_EVENT_MANUAL} or
+         *              {@link #DISMISS_EVENT_CONSECUTIVE}.
+         *
+         * @see Snackbar#dismiss()
+         */
+        public void onDismissed(Snackbar snackbar, @DismissEvent int event) {
+            // empty
+        }
+
+        /**
+         * Called when the given {@link Snackbar} is visible.
+         *
+         * @param snackbar The snackbar which is now visible.
+         * @see Snackbar#show()
+         */
+        public void onShown(Snackbar snackbar) {
+            // empty
+        }
+    }
+
+    /**
+     * @hide
+     */
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface Duration {}
+
+    /**
+     * Show the Snackbar indefinitely. This means that the Snackbar will be displayed from the time
+     * that is {@link #show() shown} until either it is dismissed, or another Snackbar is shown.
+     *
+     * @see #setDuration
+     */
+    public static final int LENGTH_INDEFINITE = -2;
+
+    /**
+     * Show the Snackbar for a short period of time.
+     *
+     * @see #setDuration
+     */
+    public static final int LENGTH_SHORT = -1;
+
+    /**
+     * Show the Snackbar for a long period of time.
+     *
+     * @see #setDuration
+     */
+    public static final int LENGTH_LONG = 0;
+
+    private static final int ANIMATION_DURATION = 250;
+    private static final int ANIMATION_FADE_DURATION = 180;
+
+    private static final Handler sHandler;
+    private static final int MSG_SHOW = 0;
+    private static final int MSG_DISMISS = 1;
+
+    static {
+        sHandler = new Handler(Looper.getMainLooper(), new Handler.Callback() {
+            @Override
+            public boolean handleMessage(Message message) {
+                switch (message.what) {
+                    case MSG_SHOW:
+                        ((Snackbar) message.obj).showView();
+                        return true;
+                    case MSG_DISMISS:
+                        ((Snackbar) message.obj).hideView(message.arg1);
+                        return true;
+                }
+                return false;
+            }
+        });
+    }
+
+    private final ViewGroup mParent;
+    private final Context mContext;
+    private final SnackbarLayout mView;
+    private int mDuration;
+    private Callback mCallback;
+
+    private Snackbar(ViewGroup parent) {
+        mParent = parent;
+        mContext = parent.getContext();
+
+        LayoutInflater inflater = LayoutInflater.from(mContext);
+        mView = (SnackbarLayout) inflater.inflate(R.layout.layout_snackbar, mParent, false);
+    }
+
+    /**
+     * Make a Snackbar to display a message
+     *
+     * <p>Snackbar will try and find a parent view to hold Snackbar's view from the value given
+     * to {@code view}. Snackbar will walk up the view tree trying to find the window decor's
+     * content view.
+     *
+     *
+     * @param view     The view to find a parent from.
+     * @param text     The text to show.  Can be formatted text.
+     * @param duration How long to display the message.  Either {@link #LENGTH_SHORT} or {@link
+     *                 #LENGTH_LONG}
+     */
+    public static Snackbar make(View view, CharSequence text,
+            @Duration int duration) {
+        Snackbar snackbar = new Snackbar(findSuitableParent(view));
+        snackbar.setText(text);
+        snackbar.setDuration(duration);
+        return snackbar;
+    }
+
+    /**
+     * Make a Snackbar to display a message.
+     *
+     * Make a Snackbar to display a message
+     *
+     * <p>Snackbar will try and find a parent view to hold Snackbar's view from the value given
+     * to {@code view}. Snackbar will walk up the view tree trying to find the window decor's
+     * content view.
+     *
+     * @param view     The view to find a parent from.
+     * @param resId    The resource id of the string resource to use. Can be formatted text.
+     * @param duration How long to display the message.  Either {@link #LENGTH_SHORT} or {@link
+     *                 #LENGTH_LONG}
+     */
+    public static Snackbar make(View view, int resId, @Duration int duration) {
+        return make(view, view.getResources().getText(resId), duration);
+    }
+
+    private static ViewGroup findSuitableParent(View view) {
+        ViewGroup fallback = null;
+        do {
+            if (view instanceof FrameLayout) {
+                if (view.getId() == android.R.id.content) {
+                    // If we've hit the decor content view, then we didn't find a CoL in the
+                    // hierarchy, so use it.
+                    return (ViewGroup) view;
+                } else {
+                    // It's not the content view but we'll use it as our fallback
+                    fallback = (ViewGroup) view;
+                }
+            }
+
+            if (view != null) {
+                // Else, we will loop and crawl up the view hierarchy and try to find a parent
+                final ViewParent parent = view.getParent();
+                view = parent instanceof View ? (View) parent : null;
+            }
+        } while (view != null);
+
+        // If we reach here then we didn't find a CoL or a suitable content view so we'll fallback
+        return fallback;
+    }
+
+    /**
+     * Set the action to be displayed in this {@link Snackbar}.
+     *
+     * @param resId    String resource to display
+     * @param listener callback to be invoked when the action is clicked
+     */
+    public Snackbar setAction(int resId, View.OnClickListener listener) {
+        return setAction(mContext.getText(resId), listener);
+    }
+
+    /**
+     * Set the action to be displayed in this {@link Snackbar}.
+     *
+     * @param text     Text to display
+     * @param listener callback to be invoked when the action is clicked
+     */
+    public Snackbar setAction(CharSequence text, final View.OnClickListener listener) {
+        final TextView tv = mView.getActionView();
+
+        if (TextUtils.isEmpty(text) || listener == null) {
+            tv.setVisibility(View.GONE);
+            tv.setOnClickListener(null);
+        } else {
+            tv.setVisibility(View.VISIBLE);
+            tv.setText(text);
+            tv.setOnClickListener(new View.OnClickListener() {
+                @Override
+                public void onClick(View view) {
+                    listener.onClick(view);
+                    // Now dismiss the Snackbar
+                    dispatchDismiss(Callback.DISMISS_EVENT_ACTION);
+                }
+            });
+        }
+        return this;
+    }
+
+    /**
+     * Sets the text color of the action specified in
+     * {@link #setAction(CharSequence, View.OnClickListener)}.
+     */
+    public Snackbar setActionTextColor(ColorStateList colors) {
+        final TextView tv = mView.getActionView();
+        tv.setTextColor(colors);
+        return this;
+    }
+
+    /**
+     * Sets the text color of the action specified in
+     * {@link #setAction(CharSequence, View.OnClickListener)}.
+     */
+    public Snackbar setActionTextColor(int color) {
+        final TextView tv = mView.getActionView();
+        tv.setTextColor(color);
+        return this;
+    }
+
+    /**
+     * Update the text in this {@link Snackbar}.
+     *
+     * @param message The new text for the Toast.
+     */
+    public Snackbar setText(CharSequence message) {
+        final TextView tv = mView.getMessageView();
+        tv.setText(message);
+        return this;
+    }
+
+    /**
+     * Update the text in this {@link Snackbar}.
+     *
+     * @param resId The new text for the Toast.
+     */
+    public Snackbar setText(int resId) {
+        return setText(mContext.getText(resId));
+    }
+
+    /**
+     * Set how long to show the view for.
+     *
+     * @param duration either be one of the predefined lengths:
+     *                 {@link #LENGTH_SHORT}, {@link #LENGTH_LONG}, or a custom duration
+     *                 in milliseconds.
+     */
+    public Snackbar setDuration(@Duration int duration) {
+        mDuration = duration;
+        return this;
+    }
+
+    /**
+     * Return the duration.
+     *
+     * @see #setDuration
+     */
+    @Duration
+    public int getDuration() {
+        return mDuration;
+    }
+
+    /**
+     * Returns the {@link Snackbar}'s view.
+     */
+    public View getView() {
+        return mView;
+    }
+
+    /**
+     * Show the {@link Snackbar}.
+     */
+    public void show() {
+        SnackbarManager.getInstance().show(mDuration, mManagerCallback);
+    }
+
+    /**
+     * Dismiss the {@link Snackbar}.
+     */
+    public void dismiss() {
+        dispatchDismiss(Callback.DISMISS_EVENT_MANUAL);
+    }
+
+    private void dispatchDismiss(@Callback.DismissEvent int event) {
+        SnackbarManager.getInstance().dismiss(mManagerCallback, event);
+    }
+
+    /**
+     * Set a callback to be called when this the visibility of this {@link Snackbar} changes.
+     */
+    public Snackbar setCallback(Callback callback) {
+        mCallback = callback;
+        return this;
+    }
+
+    /**
+     * Return whether this Snackbar is currently being shown.
+     */
+    public boolean isShown() {
+        return mView.isShown();
+    }
+
+    private final SnackbarManager.Callback mManagerCallback = new SnackbarManager.Callback() {
+        @Override
+        public void show() {
+            sHandler.sendMessage(sHandler.obtainMessage(MSG_SHOW, Snackbar.this));
+        }
+
+        @Override
+        public void dismiss(int event) {
+            sHandler.sendMessage(sHandler.obtainMessage(MSG_DISMISS, event, 0, Snackbar.this));
+        }
+    };
+
+    final void showView() {
+        if (mView.getParent() == null) {
+            mParent.addView(mView);
+        }
+
+        if (mView.isLaidOut()) {
+            // If the view is already laid out, animate it now
+            animateViewIn();
+        } else {
+            // Otherwise, add one of our layout change listeners and animate it in when laid out
+            mView.setOnLayoutChangeListener(new SnackbarLayout.OnLayoutChangeListener() {
+                @Override
+                public void onLayoutChange(View view, int left, int top, int right, int bottom) {
+                    animateViewIn();
+                    mView.setOnLayoutChangeListener(null);
+                }
+            });
+        }
+    }
+
+    private void animateViewIn() {
+        mView.setTranslationY(mView.getHeight());
+        mView.animate().translationY(0f)
+                    .setInterpolator(FAST_OUT_SLOW_IN_INTERPOLATOR)
+                    .setDuration(ANIMATION_DURATION)
+                    .setListener(new Animator.AnimatorListener() {
+                        @Override
+                        public void onAnimationCancel(Animator animation) {}
+
+                        @Override
+                        public void onAnimationStart(Animator animation) {
+                            mView.animateChildrenIn(ANIMATION_DURATION - ANIMATION_FADE_DURATION,
+                                    ANIMATION_FADE_DURATION);
+                        }
+
+                        @Override
+                        public void onAnimationEnd(Animator animation) {
+                            if (mCallback != null) {
+                                mCallback.onShown(Snackbar.this);
+                            }
+                            SnackbarManager.getInstance().onShown(mManagerCallback);
+                        }
+
+                        @Override
+                        public void onAnimationRepeat(Animator animation) {}
+
+                    }).start();
+    }
+
+    private void animateViewOut(final int event) {
+        mView.animate().translationY(mView.getHeight())
+                .setInterpolator(FAST_OUT_SLOW_IN_INTERPOLATOR)
+                .setDuration(ANIMATION_DURATION)
+                .setListener(new Animator.AnimatorListener() {
+                    @Override
+                    public void onAnimationCancel(Animator animation) {}
+
+                    @Override
+                    public void onAnimationStart(Animator animation) {
+                        mView.animateChildrenOut(0, ANIMATION_FADE_DURATION);
+                    }
+
+                    @Override
+                    public void onAnimationEnd(Animator animation) {
+                        onViewHidden(event);
+                    }
+
+                    @Override
+                    public void onAnimationRepeat(Animator animation) {}
+
+                }).start();
+
+    }
+
+    final void hideView(int event) {
+        if (mView.getVisibility() != View.VISIBLE) {
+            onViewHidden(event);
+        } else {
+            animateViewOut(event);
+        }
+    }
+
+    private void onViewHidden(int event) {
+        // First remove the view from the parent
+        mParent.removeView(mView);
+        // Now call the dismiss listener (if available)
+        if (mCallback != null) {
+            mCallback.onDismissed(this, event);
+        }
+        // Finally, tell the SnackbarManager that it has been dismissed
+        SnackbarManager.getInstance().onDismissed(mManagerCallback);
+    }
+
+    /**
+     * @hide
+     */
+    public static class SnackbarLayout extends LinearLayout {
+        private TextView mMessageView;
+        private Button mActionView;
+
+        private int mMaxWidth;
+        private int mMaxInlineActionWidth;
+
+        interface OnLayoutChangeListener {
+            public void onLayoutChange(View view, int left, int top, int right, int bottom);
+        }
+
+        private OnLayoutChangeListener mOnLayoutChangeListener;
+
+        public SnackbarLayout(Context context) {
+            this(context, null);
+        }
+
+        public SnackbarLayout(Context context, AttributeSet attrs) {
+            super(context, attrs);
+            TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.SnackbarLayout);
+            mMaxWidth = a.getDimensionPixelSize(R.styleable.SnackbarLayout_android_maxWidth, -1);
+            mMaxInlineActionWidth = a.getDimensionPixelSize(
+                    R.styleable.SnackbarLayout_maxActionInlineWidth, -1);
+            if (a.hasValue(R.styleable.SnackbarLayout_android_elevation)) {
+                setElevation(a.getDimensionPixelSize(
+                        R.styleable.SnackbarLayout_android_elevation, 0));
+            }
+            a.recycle();
+
+            setClickable(true);
+        }
+
+        @Override
+        protected void onFinishInflate() {
+            super.onFinishInflate();
+            mMessageView = (TextView) findViewById(R.id.snackbar_text);
+            mActionView = (Button) findViewById(R.id.snackbar_action);
+        }
+
+        TextView getMessageView() {
+            return mMessageView;
+        }
+
+        Button getActionView() {
+            return mActionView;
+        }
+
+        @Override
+        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+
+            if (mMaxWidth > 0 && getMeasuredWidth() > mMaxWidth) {
+                widthMeasureSpec = MeasureSpec.makeMeasureSpec(mMaxWidth, MeasureSpec.EXACTLY);
+                super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+            }
+
+            final int multiLineVPadding = getResources().getDimensionPixelSize(
+                    R.dimen.snackbar_padding_vertical_2lines);
+            final int singleLineVPadding = getResources().getDimensionPixelSize(
+                    R.dimen.snackbar_padding_vertical);
+            final boolean isMultiLine = mMessageView.getLayout().getLineCount() > 1;
+
+            boolean remeasure = false;
+            if (isMultiLine && mMaxInlineActionWidth > 0
+                    && mActionView.getMeasuredWidth() > mMaxInlineActionWidth) {
+                if (updateViewsWithinLayout(VERTICAL, multiLineVPadding,
+                        multiLineVPadding - singleLineVPadding)) {
+                    remeasure = true;
+                }
+            } else {
+                final int messagePadding = isMultiLine ? multiLineVPadding : singleLineVPadding;
+                if (updateViewsWithinLayout(HORIZONTAL, messagePadding, messagePadding)) {
+                    remeasure = true;
+                }
+            }
+
+            if (remeasure) {
+                super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+            }
+        }
+
+        void animateChildrenIn(int delay, int duration) {
+            mMessageView.setAlpha(0f);
+            mMessageView.animate().alpha(1f).setDuration(duration)
+                    .setStartDelay(delay).start();
+
+            if (mActionView.getVisibility() == VISIBLE) {
+                mActionView.setAlpha(0f);
+                mActionView.animate().alpha(1f).setDuration(duration)
+                        .setStartDelay(delay).start();
+            }
+        }
+
+        void animateChildrenOut(int delay, int duration) {
+            mMessageView.setAlpha(1f);
+            mMessageView.animate().alpha(0f).setDuration(duration)
+                    .setStartDelay(delay).start();
+
+            if (mActionView.getVisibility() == VISIBLE) {
+                mActionView.setAlpha(1f);
+                mActionView.animate().alpha(0f).setDuration(duration)
+                        .setStartDelay(delay).start();
+            }
+        }
+
+        @Override
+        protected void onLayout(boolean changed, int l, int t, int r, int b) {
+            super.onLayout(changed, l, t, r, b);
+            if (changed && mOnLayoutChangeListener != null) {
+                mOnLayoutChangeListener.onLayoutChange(this, l, t, r, b);
+            }
+        }
+
+        void setOnLayoutChangeListener(OnLayoutChangeListener onLayoutChangeListener) {
+            mOnLayoutChangeListener = onLayoutChangeListener;
+        }
+
+        private boolean updateViewsWithinLayout(final int orientation,
+                final int messagePadTop, final int messagePadBottom) {
+            boolean changed = false;
+            if (orientation != getOrientation()) {
+                setOrientation(orientation);
+                changed = true;
+            }
+            if (mMessageView.getPaddingTop() != messagePadTop
+                    || mMessageView.getPaddingBottom() != messagePadBottom) {
+                updateTopBottomPadding(mMessageView, messagePadTop, messagePadBottom);
+                changed = true;
+            }
+            return changed;
+        }
+
+        private static void updateTopBottomPadding(View view, int topPadding, int bottomPadding) {
+            if (view.isPaddingRelative()) {
+                view.setPaddingRelative(view.getPaddingStart(), topPadding,
+                        view.getPaddingEnd(), bottomPadding);
+            } else {
+                view.setPadding(view.getPaddingLeft(), topPadding,
+                        view.getPaddingRight(), bottomPadding);
+            }
+        }
+    }
+}
diff --git a/src/com/cyngn/uicommon/view/SnackbarManager.java b/src/com/cyngn/uicommon/view/SnackbarManager.java
new file mode 100644
index 0000000..278a022
--- /dev/null
+++ b/src/com/cyngn/uicommon/view/SnackbarManager.java
@@ -0,0 +1,226 @@
+/*
+ * Copyright (C) 2015 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.
+ */
+
+package com.cyngn.uicommon.view;
+
+import android.os.Handler;
+import android.os.Looper;
+import android.os.Message;
+
+import java.lang.ref.WeakReference;
+
+/**
+ * Manages {@link android.support.design.widget.Snackbar}s.
+ */
+class SnackbarManager {
+
+    private static final int MSG_TIMEOUT = 0;
+
+    private static final int SHORT_DURATION_MS = 1500;
+    private static final int LONG_DURATION_MS = 2750;
+
+    private static SnackbarManager sSnackbarManager;
+
+    static SnackbarManager getInstance() {
+        if (sSnackbarManager == null) {
+            sSnackbarManager = new SnackbarManager();
+        }
+        return sSnackbarManager;
+    }
+
+    private final Object mLock;
+    private final Handler mHandler;
+
+    private SnackbarRecord mCurrentSnackbar;
+    private SnackbarRecord mNextSnackbar;
+
+    private SnackbarManager() {
+        mLock = new Object();
+        mHandler = new Handler(Looper.getMainLooper(), new Handler.Callback() {
+            @Override
+            public boolean handleMessage(Message message) {
+                switch (message.what) {
+                    case MSG_TIMEOUT:
+                        handleTimeout((SnackbarRecord) message.obj);
+                        return true;
+                }
+                return false;
+            }
+        });
+    }
+
+    interface Callback {
+        void show();
+        void dismiss(int event);
+    }
+
+    public void show(int duration, Callback callback) {
+        synchronized (mLock) {
+            if (isCurrentSnackbar(callback)) {
+                // Means that the callback is already in the queue. We'll just update the duration
+                mCurrentSnackbar.duration = duration;
+
+                // If this is the Snackbar currently being shown, call re-schedule it's
+                // timeout
+                mHandler.removeCallbacksAndMessages(mCurrentSnackbar);
+                scheduleTimeoutLocked(mCurrentSnackbar);
+                return;
+            } else if (isNextSnackbar(callback)) {
+                // We'll just update the duration
+                mNextSnackbar.duration = duration;
+            } else {
+                // Else, we need to create a new record and queue it
+                mNextSnackbar = new SnackbarRecord(duration, callback);
+            }
+
+            if (mCurrentSnackbar != null && cancelSnackbarLocked(mCurrentSnackbar,
+                    Snackbar.Callback.DISMISS_EVENT_CONSECUTIVE)) {
+                // If we currently have a Snackbar, try and cancel it and wait in line
+                return;
+            } else {
+                // Clear out the current snackbar
+                mCurrentSnackbar = null;
+                // Otherwise, just show it now
+                showNextSnackbarLocked();
+            }
+        }
+    }
+
+    public void dismiss(Callback callback, int event) {
+        synchronized (mLock) {
+            if (isCurrentSnackbar(callback)) {
+                cancelSnackbarLocked(mCurrentSnackbar, event);
+            } else if (isNextSnackbar(callback)) {
+                cancelSnackbarLocked(mNextSnackbar, event);
+            }
+        }
+    }
+
+    /**
+     * Should be called when a Snackbar is no longer displayed. This is after any exit
+     * animation has finished.
+     */
+    public void onDismissed(Callback callback) {
+        synchronized (mLock) {
+            if (isCurrentSnackbar(callback)) {
+                // If the callback is from a Snackbar currently show, remove it and show a new one
+                mCurrentSnackbar = null;
+                if (mNextSnackbar != null) {
+                    showNextSnackbarLocked();
+                }
+            }
+        }
+    }
+
+    /**
+     * Should be called when a Snackbar is being shown. This is after any entrance animation has
+     * finished.
+     */
+    public void onShown(Callback callback) {
+        synchronized (mLock) {
+            if (isCurrentSnackbar(callback)) {
+                scheduleTimeoutLocked(mCurrentSnackbar);
+            }
+        }
+    }
+
+    public void cancelTimeout(Callback callback) {
+        synchronized (mLock) {
+            if (isCurrentSnackbar(callback)) {
+                mHandler.removeCallbacksAndMessages(mCurrentSnackbar);
+            }
+        }
+    }
+
+    public void restoreTimeout(Callback callback) {
+        synchronized (mLock) {
+            if (isCurrentSnackbar(callback)) {
+                scheduleTimeoutLocked(mCurrentSnackbar);
+            }
+        }
+    }
+
+    private static class SnackbarRecord {
+        private final WeakReference<Callback> callback;
+        private int duration;
+
+        SnackbarRecord(int duration, Callback callback) {
+            this.callback = new WeakReference<>(callback);
+            this.duration = duration;
+        }
+
+        boolean isSnackbar(Callback callback) {
+            return callback != null && this.callback.get() == callback;
+        }
+    }
+
+    private void showNextSnackbarLocked() {
+        if (mNextSnackbar != null) {
+            mCurrentSnackbar = mNextSnackbar;
+            mNextSnackbar = null;
+
+            final Callback callback = mCurrentSnackbar.callback.get();
+            if (callback != null) {
+                callback.show();
+            } else {
+                // The callback doesn't exist any more, clear out the Snackbar
+                mCurrentSnackbar = null;
+            }
+        }
+    }
+
+    private boolean cancelSnackbarLocked(SnackbarRecord record, int event) {
+        final Callback callback = record.callback.get();
+        if (callback != null) {
+            callback.dismiss(event);
+            return true;
+        }
+        return false;
+    }
+
+    private boolean isCurrentSnackbar(Callback callback) {
+        return mCurrentSnackbar != null && mCurrentSnackbar.isSnackbar(callback);
+    }
+
+    private boolean isNextSnackbar(Callback callback) {
+        return mNextSnackbar != null && mNextSnackbar.isSnackbar(callback);
+    }
+
+    private void scheduleTimeoutLocked(SnackbarRecord r) {
+        if (r.duration == Snackbar.LENGTH_INDEFINITE) {
+            // If we're set to indefinite, we don't want to set a timeout
+            return;
+        }
+
+        int durationMs = LONG_DURATION_MS;
+        if (r.duration > 0) {
+            durationMs = r.duration;
+        } else if (r.duration == Snackbar.LENGTH_SHORT) {
+            durationMs = SHORT_DURATION_MS;
+        }
+        mHandler.removeCallbacksAndMessages(r);
+        mHandler.sendMessageDelayed(Message.obtain(mHandler, MSG_TIMEOUT, r), durationMs);
+    }
+
+    private void handleTimeout(SnackbarRecord record) {
+        synchronized (mLock) {
+            if (mCurrentSnackbar == record || mNextSnackbar == record) {
+                cancelSnackbarLocked(record, Snackbar.Callback.DISMISS_EVENT_TIMEOUT);
+            }
+        }
+    }
+
+}