Added AppMsg library to the librarys-folder

2 files changed, 927 insertions, 0 deletions

diff --git a/libraries/Android-AppMsg/library/src/com/devspark/appmsg/AppMsg.java b/libraries/Android-AppMsg/library/src/com/devspark/appmsg/AppMsg.java
new file mode 100644
index 000000000..e86273762
--- /dev/null
+++ b/libraries/Android-AppMsg/library/src/com/devspark/appmsg/AppMsg.java
@@ -0,0 +1,587 @@
+/*
+ * Copyright 2012 Evgeny Shishkin
+ *
+ * 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.devspark.appmsg;
+
+import android.app.Activity;
+import android.content.Context;
+import android.content.res.Resources;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.ViewGroup.LayoutParams;
+import android.view.animation.Animation;
+import android.view.animation.AnimationUtils;
+import android.widget.FrameLayout;
+import android.widget.TextView;
+
+/**
+ * In-layout notifications. Based on {@link android.widget.Toast} notifications
+ * and article by Cyril Mottier (http://android.cyrilmottier.com/?p=773).
+ *
+ * @author e.shishkin
+ */
+public class AppMsg {
+
+    /**
+     * Show the view or text notification for a short period of time. This time
+     * could be user-definable. This is the default.
+     *
+     * @see #setDuration
+     */
+    public static final int LENGTH_SHORT = 3000;
+
+    /**
+     * Show the view or text notification for a long period of time. This time
+     * could be user-definable.
+     *
+     * @see #setDuration
+     */
+    public static final int LENGTH_LONG = 5000;
+
+    /**
+     * <p>Show the view or text notification for an undefined amount of time
+     * -Usually until an invocation of {@link #cancel()}, {@link #cancelAll(android.app.Activity)},
+     * {@link #cancelAll()} or {@link android.app.Activity#onDestroy()}-,
+     * stacking on top of any other {@link com.devspark.appmsg.AppMsg} with this duration.</p>
+     *
+     * <p><b>Note</b>: You are responsible
+     * for calling {@link #cancel()} on such {@link com.devspark.appmsg.AppMsg}.</p>
+     *
+     * @see #setDuration
+     */
+    public static final int LENGTH_STICKY = -1;
+
+    /**
+     * Lowest priority, messages with this priority will be showed after all messages with priority
+     * {@link #PRIORITY_HIGH} and {@link #PRIORITY_NORMAL} have been shown.
+     *
+     * @see #setPriority(int)
+     */
+    public static final int PRIORITY_LOW = Integer.MIN_VALUE;
+    /**
+     * Normal priority, messages with this priority will be showed after all messages with priority
+     * {@link #PRIORITY_HIGH} but before {@link #PRIORITY_LOW} have been shown.
+     *
+     * @see #setPriority(int)
+     */
+    public static final int PRIORITY_NORMAL = 0;
+    /**
+     * Highest priority, messages with this priority will be showed before any other message.
+     *
+     * @see #setPriority(int)
+     */
+    public static final int PRIORITY_HIGH = Integer.MAX_VALUE;
+
+    /**
+     * Show the text notification for a long period of time with a negative style.
+     */
+    public static final Style STYLE_ALERT = new Style(LENGTH_LONG, R.color.alert);
+
+    /**
+     * Show the text notification for a short period of time with a positive style.
+     */
+    public static final Style STYLE_CONFIRM = new Style(LENGTH_SHORT, R.color.confirm);
+
+    /**
+     * Show the text notification for a short period of time with a neutral style.
+     */
+    public static final Style STYLE_INFO = new Style(LENGTH_SHORT, R.color.info);
+
+    private final Activity mActivity;
+    private int mDuration = LENGTH_SHORT;
+    private View mView;
+    private ViewGroup mParent;
+    private LayoutParams mLayoutParams;
+    private boolean mFloating;
+    Animation mInAnimation, mOutAnimation;
+    int mPriority = PRIORITY_NORMAL;
+
+    /**
+     * Construct an empty AppMsg object. You must call {@link #setView} before
+     * you can call {@link #show}.
+     *
+     * @param activity {@link android.app.Activity} to use.
+     */
+    public AppMsg(Activity activity) {
+        mActivity =  activity;
+    }
+
+    /**
+     * Make a {@link AppMsg} that just contains a text view.
+     *
+     * @param context The context to use. Usually your
+     *                {@link android.app.Activity} object.
+     * @param text    The text to show. Can be formatted text.
+     * @param style   The style with a background and a duration.
+     */
+    public static AppMsg makeText(Activity context, CharSequence text, Style style) {
+        return makeText(context, text, style, R.layout.app_msg);
+    }
+    
+    /**
+     * @author mengguoqiang 扩展支持设置字体大小
+     * Make a {@link AppMsg} that just contains a text view.
+     *
+     * @param context The context to use. Usually your
+     *                {@link android.app.Activity} object.
+     * @param text    The text to show. Can be formatted text.
+     * @param style   The style with a background and a duration.
+     */
+    public static AppMsg makeText(Activity context, CharSequence text, Style style, float textSize) {
+        return makeText(context, text, style, R.layout.app_msg, textSize);
+    }
+
+    /**
+     * Make a {@link AppMsg} with a custom layout. The layout must have a {@link TextView} com id {@link android.R.id.message}
+     *
+     * @param context The context to use. Usually your
+     *                {@link android.app.Activity} object.
+     * @param text    The text to show. Can be formatted text.
+     * @param style   The style with a background and a duration.
+     */
+    public static AppMsg makeText(Activity context, CharSequence text, Style style, int layoutId) {
+        LayoutInflater inflate = (LayoutInflater)
+                context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+        View v = inflate.inflate(layoutId, null);
+
+        return makeText(context, text, style, v, true);
+    }
+    
+    /**
+     * @author mengguoqiang 扩展支持字体大小
+     * Make a {@link AppMsg} with a custom layout. The layout must have a {@link TextView} com id {@link android.R.id.message}
+     *
+     * @param context The context to use. Usually your
+     *                {@link android.app.Activity} object.
+     * @param text    The text to show. Can be formatted text.
+     * @param style   The style with a background and a duration.
+     */
+    public static AppMsg makeText(Activity context, CharSequence text, Style style, int layoutId, float textSize) {
+        LayoutInflater inflate = (LayoutInflater)
+                context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+        View v = inflate.inflate(layoutId, null);
+
+        return makeText(context, text, style, v, true, textSize);
+    }
+
+    /**
+     * Make a non-floating {@link AppMsg} with a custom view presented inside the layout.
+     * It can be used to create non-floating notifications if floating is false.
+     *
+     * @param context  The context to use. Usually your
+     *                 {@link android.app.Activity} object.
+     * @param customView
+     *                 View to be used.
+     * @param text     The text to show. Can be formatted text.
+     * @param style    The style with a background and a duration.
+     */
+    public static AppMsg makeText(Activity context, CharSequence text, Style style, View customView) {
+       return makeText(context, text, style, customView, false);
+    }
+
+    /**
+     * Make a {@link AppMsg} with a custom view. It can be used to create non-floating notifications if floating is false.
+     *
+     * @param context  The context to use. Usually your
+     *                 {@link android.app.Activity} object.
+     * @param view
+     *                 View to be used.
+     * @param text     The text to show. Can be formatted text.
+     * @param style    The style with a background and a duration.
+     * @param floating true if it'll float.
+     */
+    private static AppMsg makeText(Activity context, CharSequence text, Style style, View view, boolean floating) {
+        return makeText(context, text, style, view, floating, 0);
+    }
+    
+    /**
+     * 
+     * @author mengguoqiang 扩展支持设置字体大小
+     * Make a {@link AppMsg} with a custom view. It can be used to create non-floating notifications if floating is false.
+     *
+     * @param context  The context to use. Usually your
+     *                 {@link android.app.Activity} object.
+     * @param view
+     *                 View to be used.
+     * @param text     The text to show. Can be formatted text.
+     * @param style    The style with a background and a duration.
+     * @param floating true if it'll float.
+     */
+    private static AppMsg makeText(Activity context, CharSequence text, Style style, View view, boolean floating, float textSize) {
+        AppMsg result = new AppMsg(context);
+
+        view.setBackgroundResource(style.background);
+
+        TextView tv = (TextView) view.findViewById(android.R.id.message);
+        if(textSize > 0) tv.setTextSize(textSize);
+        tv.setText(text);
+
+        result.mView = view;
+        result.mDuration = style.duration;
+        result.mFloating = floating;
+
+        return result;
+    }
+
+    /**
+     * Make a {@link AppMsg} with a custom view. It can be used to create non-floating notifications if floating is false.
+     *
+     * @param context  The context to use. Usually your
+     *                 {@link android.app.Activity} object.
+     * @param resId    The resource id of the string resource to use. Can be
+     *                 formatted text.
+     * @param style    The style with a background and a duration.
+     * @param floating true if it'll float.
+     */
+    public static AppMsg makeText(Activity context, int resId, Style style, View customView, boolean floating) {
+        return makeText(context, context.getResources().getText(resId), style, customView, floating);
+    }
+
+    /**
+     * Make a {@link AppMsg} that just contains a text view with the text from a
+     * resource.
+     *
+     * @param context The context to use. Usually your
+     *                {@link android.app.Activity} object.
+     * @param resId   The resource id of the string resource to use. Can be
+     *                formatted text.
+     * @param style   The style with a background and a duration.
+     * @throws Resources.NotFoundException if the resource can't be found.
+     */
+    public static AppMsg makeText(Activity context, int resId, Style style)
+            throws Resources.NotFoundException {
+        return makeText(context, context.getResources().getText(resId), style);
+    }
+
+    /**
+     * Make a {@link AppMsg} with a custom layout using the text from a
+     * resource. The layout must have a {@link TextView} com id {@link android.R.id.message}
+     *
+     * @param context The context to use. Usually your
+     *                {@link android.app.Activity} object.
+     * @param resId   The resource id of the string resource to use. Can be
+     *                formatted text.
+     * @param style   The style with a background and a duration.
+     * @throws Resources.NotFoundException if the resource can't be found.
+     */
+    public static AppMsg makeText(Activity context, int resId, Style style, int layoutId)
+            throws Resources.NotFoundException {
+        return makeText(context, context.getResources().getText(resId), style, layoutId);
+    }
+
+    /**
+     * Show the view for the specified duration.
+     */
+    public void show() {
+        MsgManager manager = MsgManager.obtain(mActivity);
+        manager.add(this);
+    }
+
+    /**
+     * @return <code>true</code> if the {@link AppMsg} is being displayed, else <code>false</code>.
+     */
+    public boolean isShowing() {
+        if (mFloating) {
+            return mView != null && mView.getParent() != null;
+        } else {
+            return mView.getVisibility() == View.VISIBLE;
+        }
+    }
+
+    /**
+     * Close the view if it's showing, or don't show it if it isn't showing yet.
+     * You do not normally have to call this.  Normally view will disappear on its own
+     * after the appropriate duration.
+     */
+    public void cancel() {
+        MsgManager.obtain(mActivity).clearMsg(this);
+
+    }
+
+    /**
+     * Cancels all queued {@link AppMsg}s, in all Activities. If there is a {@link AppMsg}
+     * displayed currently, it will be the last one displayed.
+     */
+    public static void cancelAll() {
+        MsgManager.clearAll();
+    }
+
+    /**
+     * Cancels all queued {@link AppMsg}s, in given {@link android.app.Activity}.
+     * If there is a {@link AppMsg} displayed currently, it will be the last one displayed.
+     * @param activity
+     */
+    public static void cancelAll(Activity activity) {
+        MsgManager.release(activity);
+    }
+
+    /**
+     * Return the activity.
+     */
+    public Activity getActivity() {
+        return mActivity;
+    }
+
+    /**
+     * Set the view to show.
+     *
+     * @see #getView
+     */
+    public void setView(View view) {
+        mView = view;
+    }
+
+    /**
+     * Return the view.
+     *
+     * @see #setView
+     */
+    public View getView() {
+        return mView;
+    }
+
+    /**
+     * Set how long to show the view for.
+     *
+     * @see #LENGTH_SHORT
+     * @see #LENGTH_LONG
+     */
+    public void setDuration(int duration) {
+        mDuration = duration;
+    }
+
+    /**
+     * Return the duration.
+     *
+     * @see #setDuration
+     */
+    public int getDuration() {
+        return mDuration;
+    }
+
+    /**
+     * Update the text in a AppMsg that was previously created using one of the makeText() methods.
+     *
+     * @param resId The new text for the AppMsg.
+     */
+    public void setText(int resId) {
+        setText(mActivity.getText(resId));
+    }
+
+    /**
+     * Update the text in a AppMsg that was previously created using one of the makeText() methods.
+     *
+     * @param s The new text for the AppMsg.
+     */
+    public void setText(CharSequence s) {
+        if (mView == null) {
+            throw new RuntimeException("This AppMsg was not created with AppMsg.makeText()");
+        }
+        TextView tv = (TextView) mView.findViewById(android.R.id.message);
+        if (tv == null) {
+            throw new RuntimeException("This AppMsg was not created with AppMsg.makeText()");
+        }
+        tv.setText(s);
+    }
+
+    /**
+     * Gets the crouton's layout parameters, constructing a default if necessary.
+     *
+     * @return the layout parameters
+     */
+    public LayoutParams getLayoutParams() {
+        if (mLayoutParams == null) {
+            mLayoutParams = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
+        }
+        return mLayoutParams;
+    }
+
+    /**
+     * Sets the layout parameters which will be used to display the crouton.
+     *
+     * @param layoutParams The layout parameters to use.
+     * @return <code>this</code>, for chaining.
+     */
+    public AppMsg setLayoutParams(LayoutParams layoutParams) {
+        mLayoutParams = layoutParams;
+        return this;
+    }
+
+    /**
+     * Constructs and sets the layout parameters to have some gravity.
+     *
+     * @param gravity the gravity of the Crouton
+     * @return <code>this</code>, for chaining.
+     * @see android.view.Gravity
+     */
+    public AppMsg setLayoutGravity(int gravity) {
+        mLayoutParams = new FrameLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT, gravity);
+        return this;
+    }
+
+    /**
+     * Return the value of floating.
+     *
+     * @see #setFloating(boolean)
+     */
+    public boolean isFloating() {
+        return mFloating;
+    }
+
+    /**
+     * Sets the value of floating.
+     *
+     * @param mFloating
+     */
+    public void setFloating(boolean mFloating) {
+        this.mFloating = mFloating;
+    }
+
+    /**
+     * Sets the Animations to be used when displaying/removing the Crouton.
+     * @param inAnimation the Animation resource ID to be used when displaying.
+     * @param outAnimation the Animation resource ID to be used when removing.
+     */
+    public AppMsg setAnimation(int inAnimation, int outAnimation) {
+        return setAnimation(AnimationUtils.loadAnimation(mActivity, inAnimation),
+                AnimationUtils.loadAnimation(mActivity, outAnimation));
+    }
+
+    /**
+     * Sets the Animations to be used when displaying/removing the Crouton.
+     * @param inAnimation the Animation to be used when displaying.
+     * @param outAnimation the Animation to be used when removing.
+     */
+    public AppMsg setAnimation(Animation inAnimation, Animation outAnimation) {
+        mInAnimation = inAnimation;
+        mOutAnimation = outAnimation;
+        return this;
+    }
+
+    /**
+     * @return
+     * Current priority
+     *
+     * @see #PRIORITY_HIGH
+     * @see #PRIORITY_NORMAL
+     * @see #PRIORITY_LOW
+     */
+    public int getPriority() {
+        return mPriority;
+    }
+
+    /**
+     * <p>Set priority for this message</p>
+     * <p><b>Note</b>: This only affects the order in which the messages get shown,
+     * not the stacking order of the views.</p>
+     *
+     * <p>Example: In the queue there are 3 messages [A, B, C],
+     * all of them with priority {@link #PRIORITY_NORMAL}, currently message A is being shown
+     * so we add a new message D with priority {@link #PRIORITY_HIGH}, after A goes away, given that
+     * D has a higher priority than B an the reset, D will be shown, then once that D is gone,
+     * B will be shown, and then finally C.</p>
+     *
+     * @param priority
+     * A value indicating priority, although you can use any integer value, usage of already
+     * defined is highly encouraged.
+     *
+     * @see #PRIORITY_HIGH
+     * @see #PRIORITY_NORMAL
+     * @see #PRIORITY_LOW
+     */
+    public void setPriority(int priority) {
+        mPriority = priority;
+    }
+
+    /**
+     * @return
+     * Provided parent to add {@link #getView()} to using {@link #getLayoutParams()}.
+     */
+    public ViewGroup getParent() {
+        return mParent;
+    }
+
+    /**
+     * Provide a different parent than Activity decor view
+     * @param parent
+     * Provided parent to add {@link #getView()} to using {@link #getLayoutParams()}.
+     *
+     */
+    public void setParent(ViewGroup parent) {
+        mParent = parent;
+    }
+
+    /**
+     * Provide a different parent than Activity decor view
+     *
+     * @param parentId
+     * Provided parent id to add {@link #getView()} to using {@link #getLayoutParams()}.
+     *
+     */
+    public void setParent(int parentId) {
+        setParent((ViewGroup) mActivity.findViewById(parentId));
+    }
+
+    /**
+     * The style for a {@link AppMsg}.
+     *
+     * @author e.shishkin
+     */
+    public static class Style {
+
+        private final int duration;
+        private final int background;
+
+        /**
+         * Construct an {@link AppMsg.Style} object.
+         *
+         * @param duration How long to display the message. Either
+         *                 {@link #LENGTH_SHORT} or {@link #LENGTH_LONG}
+         * @param resId    resource for AppMsg background
+         */
+        public Style(int duration, int resId) {
+            this.duration = duration;
+            this.background = resId;
+        }
+
+        /**
+         * Return the duration in milliseconds.
+         */
+        public int getDuration() {
+            return duration;
+        }
+
+        /**
+         * Return the resource id of background.
+         */
+        public int getBackground() {
+            return background;
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (!(o instanceof AppMsg.Style)) {
+                return false;
+            }
+            Style style = (Style) o;
+            return style.duration == duration
+                    && style.background == background;
+        }
+
+    }
+
+}
diff --git a/libraries/Android-AppMsg/library/src/com/devspark/appmsg/MsgManager.java b/libraries/Android-AppMsg/library/src/com/devspark/appmsg/MsgManager.java
new file mode 100644
index 000000000..962648566
--- /dev/null
+++ b/libraries/Android-AppMsg/library/src/com/devspark/appmsg/MsgManager.java
@@ -0,0 +1,340 @@
+/*
+ * Copyright 2012 Evgeny Shishkin
+ *
+ * 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.devspark.appmsg;
+
+import android.annotation.TargetApi;
+import android.app.Activity;
+import android.app.Application;
+import android.os.Bundle;
+import android.os.Handler;
+import android.os.Message;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.animation.Animation;
+import android.view.animation.AnimationUtils;
+
+import java.lang.ref.WeakReference;
+import java.util.Collection;
+import java.util.Comparator;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.LinkedList;
+import java.util.PriorityQueue;
+import java.util.Queue;
+import java.util.WeakHashMap;
+
+import static android.app.Application.ActivityLifecycleCallbacks;
+import static android.os.Build.VERSION.SDK_INT;
+import static android.os.Build.VERSION_CODES.ICE_CREAM_SANDWICH;
+import static com.devspark.appmsg.AppMsg.LENGTH_STICKY;
+
+/**
+ * @author Evgeny Shishkin
+ */
+class MsgManager extends Handler implements Comparator<AppMsg> {
+
+    private static final int MESSAGE_DISPLAY = 0xc2007;
+    private static final int MESSAGE_ADD_VIEW = 0xc20074dd;
+    private static final int MESSAGE_REMOVE = 0xc2007de1;
+
+    private static WeakHashMap<Activity, MsgManager> sManagers;
+    private static ReleaseCallbacks sReleaseCallbacks;
+
+    private final Queue<AppMsg> msgQueue;
+    private final Queue<AppMsg> stickyQueue;
+
+    private MsgManager() {
+        msgQueue = new PriorityQueue<AppMsg>(1, this);
+        stickyQueue = new LinkedList<AppMsg>();
+    }
+
+    /**
+     * @return A {@link MsgManager} instance to be used for given {@link android.app.Activity}.
+     */
+    static synchronized MsgManager obtain(Activity activity) {
+        if (sManagers == null) {
+            sManagers = new WeakHashMap<Activity, MsgManager>(1);
+        }
+        MsgManager manager = sManagers.get(activity);
+        if (manager == null) {
+            manager = new MsgManager();
+            ensureReleaseOnDestroy(activity);
+            sManagers.put(activity, manager);
+        }
+
+        return manager;
+    }
+
+    static void ensureReleaseOnDestroy(Activity activity) {
+        if (SDK_INT < ICE_CREAM_SANDWICH) {
+            return;
+        }
+        if (sReleaseCallbacks == null) {
+            sReleaseCallbacks = new ReleaseCallbacksIcs();
+        }
+        sReleaseCallbacks.register(activity.getApplication());
+    }
+
+
+    static synchronized void release(Activity activity) {
+        if (sManagers != null) {
+            final MsgManager manager = sManagers.remove(activity);
+            if (manager != null) {
+                manager.clearAllMsg();
+            }
+        }
+    }
+
+    static synchronized void clearAll() {
+        if (sManagers != null) {
+            final Iterator<MsgManager> iterator = sManagers.values().iterator();
+            while (iterator.hasNext()) {
+                final MsgManager manager = iterator.next();
+                if (manager != null) {
+                    manager.clearAllMsg();
+                }
+                iterator.remove();
+            }
+            sManagers.clear();
+        }
+    }
+
+    /**
+     * Inserts a {@link AppMsg} to be displayed.
+     *
+     * @param appMsg
+     */
+    void add(AppMsg appMsg) {
+        msgQueue.add(appMsg);
+        if (appMsg.mInAnimation == null) {
+            appMsg.mInAnimation = AnimationUtils.loadAnimation(appMsg.getActivity(),
+                    android.R.anim.fade_in);
+        }
+        if (appMsg.mOutAnimation == null) {
+            appMsg.mOutAnimation = AnimationUtils.loadAnimation(appMsg.getActivity(),
+                    android.R.anim.fade_out);
+        }
+        displayMsg();
+    }
+
+    /**
+     * Removes all {@link AppMsg} from the queue.
+     */
+    void clearMsg(AppMsg appMsg) {
+        if(msgQueue.contains(appMsg) || stickyQueue.contains(appMsg)){
+            // Avoid the message from being removed twice.
+            removeMessages(MESSAGE_DISPLAY, appMsg);
+            removeMessages(MESSAGE_ADD_VIEW, appMsg);
+            removeMessages(MESSAGE_REMOVE, appMsg);
+            msgQueue.remove(appMsg);
+            stickyQueue.remove(appMsg);
+            removeMsg(appMsg);
+        }
+    }
+
+    /**
+     * Removes all {@link AppMsg} from the queue.
+     */
+    void clearAllMsg() {
+        removeMessages(MESSAGE_DISPLAY);
+        removeMessages(MESSAGE_ADD_VIEW);
+        removeMessages(MESSAGE_REMOVE);
+        clearShowing();
+        msgQueue.clear();
+        stickyQueue.clear();
+    }
+
+    void clearShowing() {
+        final Collection<AppMsg> showing = new HashSet<AppMsg>();
+        obtainShowing(msgQueue, showing);
+        obtainShowing(stickyQueue, showing);
+        for (AppMsg msg : showing) {
+            clearMsg(msg);
+        }
+    }
+
+    static void obtainShowing(Collection<AppMsg> from, Collection<AppMsg> appendTo) {
+        for (AppMsg msg : from) {
+            if (msg.isShowing()) {
+                appendTo.add(msg);
+            }
+        }
+    }
+
+    /**
+     * Displays the next {@link AppMsg} within the queue.
+     */
+    private void displayMsg() {
+        if (msgQueue.isEmpty()) {
+            return;
+        }
+        // First peek whether the AppMsg is being displayed.
+        final AppMsg appMsg = msgQueue.peek();
+        final Message msg;
+        if (!appMsg.isShowing()) {
+            // Display the AppMsg
+            msg = obtainMessage(MESSAGE_ADD_VIEW);
+            msg.obj = appMsg;
+            sendMessage(msg);
+        } else if (appMsg.getDuration() != LENGTH_STICKY) {
+            msg = obtainMessage(MESSAGE_DISPLAY);
+            sendMessageDelayed(msg, appMsg.getDuration()
+                    + appMsg.mInAnimation.getDuration() + appMsg.mOutAnimation.getDuration());
+        }
+    }
+
+    /**
+     * Removes the {@link AppMsg}'s view after it's display duration.
+     *
+     * @param appMsg The {@link AppMsg} added to a {@link ViewGroup} and should be removed.s
+     */
+    private void removeMsg(final AppMsg appMsg) {
+        clearMsg(appMsg);
+        final View view = appMsg.getView();
+        ViewGroup parent = ((ViewGroup) view.getParent());
+        if (parent != null) {
+            appMsg.mOutAnimation.setAnimationListener(new OutAnimationListener(appMsg));
+            view.clearAnimation();
+            view.startAnimation(appMsg.mOutAnimation);
+        }
+
+        Message msg = obtainMessage(MESSAGE_DISPLAY);
+        sendMessage(msg);
+    }
+
+    private void addMsgToView(AppMsg appMsg) {
+        View view = appMsg.getView();
+        if (view.getParent() == null) { // Not added yet
+            final ViewGroup targetParent = appMsg.getParent();
+            final ViewGroup.LayoutParams params = appMsg.getLayoutParams();
+            if (targetParent != null) {
+                targetParent.addView(view, params);
+            } else {
+                appMsg.getActivity().addContentView(view, params);
+            }
+        }
+        view.clearAnimation();
+        view.startAnimation(appMsg.mInAnimation);
+        if (view.getVisibility() != View.VISIBLE) {
+            view.setVisibility(View.VISIBLE);
+        }
+
+        final int duration = appMsg.getDuration();
+        if (duration != LENGTH_STICKY) {
+            final Message msg = obtainMessage(MESSAGE_REMOVE);
+            msg.obj = appMsg;
+            sendMessageDelayed(msg, duration);
+        } else { // We are sticky, we don't get removed just yet
+            stickyQueue.add(msgQueue.poll());
+        }
+    }
+
+    @Override
+    public void handleMessage(Message msg) {
+        final AppMsg appMsg;
+        switch (msg.what) {
+            case MESSAGE_DISPLAY:
+                displayMsg();
+                break;
+            case MESSAGE_ADD_VIEW:
+                appMsg = (AppMsg) msg.obj;
+                addMsgToView(appMsg);
+                break;
+            case MESSAGE_REMOVE:
+                appMsg = (AppMsg) msg.obj;
+                removeMsg(appMsg);
+                break;
+            default:
+                super.handleMessage(msg);
+                break;
+        }
+    }
+
+    @Override
+    public int compare(AppMsg lhs, AppMsg rhs) {
+        return inverseCompareInt(lhs.mPriority, rhs.mPriority);
+    }
+
+    static int inverseCompareInt(int lhs, int rhs) {
+        return lhs < rhs ? 1 : (lhs == rhs ? 0 : -1);
+    }
+
+    private static class OutAnimationListener implements Animation.AnimationListener {
+
+        private final AppMsg appMsg;
+
+        private OutAnimationListener(AppMsg appMsg) {
+            this.appMsg = appMsg;
+        }
+
+        @Override
+        public void onAnimationStart(Animation animation) {
+
+        }
+
+        @Override
+        public void onAnimationEnd(Animation animation) {
+            final View view = appMsg.getView();
+            if (appMsg.isFloating()) {
+                final ViewGroup parent = ((ViewGroup) view.getParent());
+                if (parent != null) {
+                    parent.post(new Runnable() { // One does not simply removeView
+                        @Override
+                        public void run() {
+                            parent.removeView(view);
+                        }
+                    });
+                }
+            } else {
+                view.setVisibility(View.GONE);
+            }
+        }
+
+        @Override
+        public void onAnimationRepeat(Animation animation) {
+
+        }
+    }
+
+    interface ReleaseCallbacks {
+        void register(Application application);
+    }
+
+    @TargetApi(ICE_CREAM_SANDWICH)
+    static class ReleaseCallbacksIcs implements ActivityLifecycleCallbacks, ReleaseCallbacks {
+        private WeakReference<Application> mLastApp;
+        public void register(Application app) {
+            if (mLastApp != null && mLastApp.get() == app) {
+                return; // Already registered with this app
+            } else {
+                mLastApp = new WeakReference<Application>(app);
+            }
+            app.registerActivityLifecycleCallbacks(this);
+        }
+
+        @Override
+        public void onActivityDestroyed(Activity activity) {
+            release(activity);
+        }
+        @Override public void onActivityCreated(Activity activity, Bundle savedInstanceState) {}
+        @Override public void onActivityStarted(Activity activity) {}
+        @Override public void onActivityResumed(Activity activity) {}
+        @Override public void onActivityPaused(Activity activity) {}
+        @Override public void onActivityStopped(Activity activity) {}
+        @Override public void onActivitySaveInstanceState(Activity activity, Bundle outState) {}
+    }
+}
\ No newline at end of file