Merge "Samsung Printer Recommendation plugin" am: 1c9d9328ab

am: 7190caf83a

* commit '7190caf83a806b1db9d54cae545d92c83c045821':
  Samsung Printer Recommendation plugin

Change-Id: I88a2e9a5bf57bda0392171afc8313cb7f4b5ab7f

34 files changed, 1318 insertions, 0 deletions

diff --git a/SamsungPrinterRecommendation/app/build.gradle b/SamsungPrinterRecommendation/app/build.gradle
new file mode 100644
index 0000000..1fa7cfe
--- /dev/null
+++ b/SamsungPrinterRecommendation/app/build.gradle
@@ -0,0 +1,31 @@
+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 'android-N'
+    buildToolsVersion "23.0.3"
+
+    defaultConfig {
+        applicationId "com.example.android.discovery.recommendation"
+        minSdkVersion 'N'
+        targetSdkVersion 'N'
+        versionCode 1
+        versionName "1.0"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+    lintOptions {
+        disable 'AllowBackup', 'GoogleAppIndexingWarning'
+        abortOnError false
+        checkReleaseBuilds true
+    }
+}
+
+dependencies {
+    compile fileTree(dir: 'libs', include: ['*.jar'])
+    compile 'com.android.support:appcompat-v7:23.3.0'
+    compile 'com.android.support:design:23.3.0'
+}
diff --git a/SamsungPrinterRecommendation/app/proguard-rules.pro b/SamsungPrinterRecommendation/app/proguard-rules.pro
new file mode 100644
index 0000000..002b260
--- /dev/null
+++ b/SamsungPrinterRecommendation/app/proguard-rules.pro
@@ -0,0 +1,17 @@
+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in /toolbox/jdelhier/android-sdk-linux/tools/proguard/proguard-android.txt
+# You can edit the include path and order by changing the proguardFiles
+# directive in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# Add any project specific keep options here:
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
diff --git a/SamsungPrinterRecommendation/app/src/main/AndroidManifest.xml b/SamsungPrinterRecommendation/app/src/main/AndroidManifest.xml
new file mode 100644
index 0000000..745ec0c
--- /dev/null
+++ b/SamsungPrinterRecommendation/app/src/main/AndroidManifest.xml
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.android.discovery.recommendation" >
+
+    <uses-permission android:name="android.permission.INTERNET"/>
+    <application
+        android:allowBackup="false"
+        android:fullBackupContent="false"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme" >
+        <activity
+            android:name=".DeviceList"
+            android:label="@string/title_activity_device_list"
+            android:theme="@style/AppTheme.NoActionBar" >
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>
diff --git a/SamsungPrinterRecommendation/app/src/main/java/com/android/discovery/recommendation/MDnsUtils.java b/SamsungPrinterRecommendation/app/src/main/java/com/android/discovery/recommendation/MDnsUtils.java
new file mode 100644
index 0000000..efc8c61
--- /dev/null
+++ b/SamsungPrinterRecommendation/app/src/main/java/com/android/discovery/recommendation/MDnsUtils.java
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2016 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.android.discovery.recommendation;
+
+import android.net.nsd.NsdServiceInfo;
+import android.text.TextUtils;
+
+import java.nio.charset.StandardCharsets;
+import java.util.Locale;
+import java.util.Map;
+
+public class MDnsUtils {
+    public static final String ATTRIBUTE__TY = "ty";
+    public static final String ATTRIBUTE__PRODUCT = "product";
+    public static final String ATTRIBUTE__USB_MFG = "usb_MFG";
+    public static final String ATTRIBUTE__MFG = "mfg";
+
+    public static String getString(byte[] value) {
+        if (value != null) return new String(value,StandardCharsets.UTF_8);
+        return null;
+    }
+
+    public static boolean isVendorPrinter(NsdServiceInfo networkDevice, String[] vendorValues) {
+
+        Map<String,byte[]> attributes = networkDevice.getAttributes();
+        String product = getString(attributes.get(ATTRIBUTE__PRODUCT));
+        String ty = getString(attributes.get(ATTRIBUTE__TY));
+        String usbMfg = getString(attributes.get(ATTRIBUTE__USB_MFG));
+        String mfg = getString(attributes.get(ATTRIBUTE__MFG));
+        return containsVendor(product, vendorValues) || containsVendor(ty, vendorValues) || containsVendor(usbMfg, vendorValues) || containsVendor(mfg, vendorValues);
+
+    }
+
+    public static String getVendor(NsdServiceInfo networkDevice) {
+        String vendor;
+
+        Map<String,byte[]> attributes = networkDevice.getAttributes();
+        vendor = getString(attributes.get(ATTRIBUTE__MFG));
+        if (!TextUtils.isEmpty(vendor)) return vendor;
+        vendor = getString(attributes.get(ATTRIBUTE__USB_MFG));
+        if (!TextUtils.isEmpty(vendor)) return vendor;
+
+        return null;
+    }
+
+    private static boolean containsVendor(String container, String[] vendorValues) {
+        if ((container == null) || (vendorValues == null)) return false;
+        for (String value : vendorValues) {
+            if (containsString(container, value)
+                || containsString(container.toLowerCase(Locale.US), value.toLowerCase(Locale.US))
+                || containsString(container.toUpperCase(Locale.US), value.toUpperCase(Locale.US)))
+                return true;
+        }
+        return false;
+    }
+
+    private static boolean containsString(String container, String contained) {
+        return (container != null) && (contained != null) && (container.equalsIgnoreCase(contained) || container.contains(contained + " "));
+    }
+}
diff --git a/SamsungPrinterRecommendation/app/src/main/java/com/android/discovery/recommendation/PrintServicePlugin.java b/SamsungPrinterRecommendation/app/src/main/java/com/android/discovery/recommendation/PrintServicePlugin.java
new file mode 100644
index 0000000..68aa435
--- /dev/null
+++ b/SamsungPrinterRecommendation/app/src/main/java/com/android/discovery/recommendation/PrintServicePlugin.java
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2016 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.android.discovery.recommendation;
+
+import android.support.annotation.IntRange;
+import android.support.annotation.NonNull;
+import android.support.annotation.StringRes;
+
+/**
+ * Interface to be implemented by each print service plugin.
+ * <p/>
+ * A print service plugin is a minimal version of a real {@link android.printservice.PrintService
+ * print service}. You cannot print using the plugin. The only functionality in the plugin is to
+ * report the number of printers that the real service would discover.
+ */
+public interface PrintServicePlugin {
+   /**
+    * Call back used by the print service plugins.
+    */
+   interface PrinterDiscoveryCallback {
+       /**
+        * Announce that something changed and the UI for this plugin should be updated.
+        *
+        * @param numDiscoveredPrinters The number of printers discovered.
+        */
+       void onChanged(@IntRange(from = 0) int numDiscoveredPrinters);
+   }
+   /**
+    * Get the name (a string reference) of the {@link android.printservice.PrintService print
+    * service} with the {@link #getPackageName specified package name}. This is read once, hence
+    * returning different data at different times is not allowed.
+    *
+    * @return The name of the print service as a string reference. The localization is handled
+    *         outside of the plugin.
+    */
+   @StringRes int getName();
+   /**
+    * The package name of the full print service.
+    *
+    * @return The package name
+    */
+   @NonNull CharSequence getPackageName();
+   /**
+    * Start the discovery plugin.
+    *
+    * @param callback Callbacks used by this plugin.
+    *
+    * @throws Exception If anything went wrong when starting the plugin
+    */
+   void start(@NonNull PrinterDiscoveryCallback callback) throws Exception;
+   /**
+    * Stop the plugin. This can only return once the plugin is completely finished and cleaned up.
+    *
+    * @throws Exception If anything went wrong while stopping plugin
+    */
+   void stop() throws Exception;
+}
diff --git a/SamsungPrinterRecommendation/app/src/main/java/com/android/discovery/recommendation/PrinterHashMap.java b/SamsungPrinterRecommendation/app/src/main/java/com/android/discovery/recommendation/PrinterHashMap.java
new file mode 100644
index 0000000..e9e50d7
--- /dev/null
+++ b/SamsungPrinterRecommendation/app/src/main/java/com/android/discovery/recommendation/PrinterHashMap.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2016 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.android.discovery.recommendation;
+
+import android.net.nsd.NsdServiceInfo;
+
+import java.util.HashMap;
+
+public final class PrinterHashMap extends HashMap<String, NsdServiceInfo> {
+    public static String getKey(NsdServiceInfo serviceInfo) {
+        return serviceInfo.getServiceName();
+    }
+    public NsdServiceInfo addPrinter(NsdServiceInfo device) {
+        return put(getKey(device), device);
+    }
+    public NsdServiceInfo removePrinter(NsdServiceInfo device) {
+        return remove(getKey(device));
+    }
+}
diff --git a/SamsungPrinterRecommendation/app/src/main/java/com/android/discovery/recommendation/ServiceListener.java b/SamsungPrinterRecommendation/app/src/main/java/com/android/discovery/recommendation/ServiceListener.java
new file mode 100644
index 0000000..3837a67
--- /dev/null
+++ b/SamsungPrinterRecommendation/app/src/main/java/com/android/discovery/recommendation/ServiceListener.java
@@ -0,0 +1,185 @@
+/*
+ * Copyright (C) 2016 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.android.discovery.recommendation;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.net.nsd.NsdManager;
+import android.net.nsd.NsdServiceInfo;
+import android.text.TextUtils;
+import android.util.Pair;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import com.example.android.discovery.recommendation.R;
+
+public class ServiceListener implements ServiceResolveQueue.ResolveCallback {
+
+    private final NsdManager mNSDManager;
+    private final Map<String, VendorInfo> mVendorInfoHashMap;
+    private final String[] mServiceType;
+    private final Observer mObserver;
+    private final ServiceResolveQueue mResolveQueue;
+    private List<NsdManager.DiscoveryListener> mListeners = new ArrayList<>();
+    public HashMap<String, PrinterHashMap> mVendorHashMap = new HashMap<>();
+
+    public interface Observer {
+        boolean matchesCriteria(String vendor, NsdServiceInfo serviceInfo);
+        void dataSetChanged();
+    }
+
+    public ServiceListener(Context context, Observer observer, String[] serviceTypes) {
+        mResolveQueue = ServiceResolveQueue.getInstance();
+        mObserver = observer;
+        mServiceType = serviceTypes;
+        mNSDManager = (NsdManager)context.getSystemService(Context.NSD_SERVICE);
+
+        Map<String, VendorInfo> vendorInfoMap = new HashMap<>();
+        TypedArray testArray = context.getResources().obtainTypedArray(R.array.known_print_plugin_vendors);
+        for(int i = 0; i < testArray.length(); i++) {
+            int arrayID = testArray.getResourceId(i, 0);
+            if (arrayID != 0) {
+                VendorInfo info = new VendorInfo(context.getResources(), arrayID);
+                vendorInfoMap.put(info.mVendorID, info);
+                vendorInfoMap.put(info.mPackageName, info);
+            }
+        }
+        testArray.recycle();
+        mVendorInfoHashMap = vendorInfoMap;
+    }
+
+    @Override
+    public void serviceResolved(NsdServiceInfo nsdServiceInfo) {
+        printerFound(nsdServiceInfo);
+    }
+
+    private synchronized void printerFound(NsdServiceInfo nsdServiceInfo) {
+        if (nsdServiceInfo == null) return;
+        if (TextUtils.isEmpty(PrinterHashMap.getKey(nsdServiceInfo))) return;
+        String vendor = MDnsUtils.getVendor(nsdServiceInfo);
+        if (vendor == null) vendor = "";
+        for(Map.Entry<String,VendorInfo> entry : mVendorInfoHashMap.entrySet()) {
+            for(String vendorValues : entry.getValue().mDNSValues) {
+                if (vendor.equalsIgnoreCase(vendorValues)) {
+                    vendor = entry.getValue().mVendorID;
+                    break;
+                }
+            }
+            // intentional pointer check
+            //noinspection StringEquality
+            if ((vendor != entry.getValue().mVendorID) &&
+                    MDnsUtils.isVendorPrinter(nsdServiceInfo, entry.getValue().mDNSValues)) {
+                vendor = entry.getValue().mVendorID;
+            }
+            // intentional pointer check
+            //noinspection StringEquality
+            if (vendor == entry.getValue().mVendorID) break;
+        }
+
+        if (TextUtils.isEmpty(vendor)) {
+            return;
+        }
+
+        if (!mObserver.matchesCriteria(vendor, nsdServiceInfo))
+            return;
+        boolean mapsChanged;
+
+        PrinterHashMap vendorHash = mVendorHashMap.get(vendor);
+        if (vendorHash == null) {
+            vendorHash = new PrinterHashMap();
+        }
+        mapsChanged = (vendorHash.addPrinter(nsdServiceInfo) == null);
+        mVendorHashMap.put(vendor, vendorHash);
+
+        if (mapsChanged) {
+            mObserver.dataSetChanged();
+        }
+    }
+
+    private synchronized void printerRemoved(NsdServiceInfo nsdServiceInfo) {
+        boolean wasRemoved = false;
+        Set<String> vendors = mVendorHashMap.keySet();
+        for(String vendor : vendors) {
+            PrinterHashMap map = mVendorHashMap.get(vendor);
+            wasRemoved |= (map.removePrinter(nsdServiceInfo) != null);
+            if (map.isEmpty()) wasRemoved |= (mVendorHashMap.remove(vendor) != null);
+        }
+        if (wasRemoved) {
+            mObserver.dataSetChanged();
+        }
+    }
+
+    public void start() {
+        stop();
+        for(final String service :mServiceType) {
+            NsdManager.DiscoveryListener listener = new NsdManager.DiscoveryListener() {
+                @Override
+                public void onStartDiscoveryFailed(String s, int i) {
+
+                }
+
+                @Override
+                public void onStopDiscoveryFailed(String s, int i) {
+
+                }
+
+                @Override
+                public void onDiscoveryStarted(String s) {
+
+                }
+
+                @Override
+                public void onDiscoveryStopped(String s) {
+
+                }
+
+                @Override
+                public void onServiceFound(NsdServiceInfo nsdServiceInfo) {
+                    mResolveQueue.queueRequest(nsdServiceInfo, ServiceListener.this);
+                }
+
+                @Override
+                public void onServiceLost(NsdServiceInfo nsdServiceInfo) {
+                    mResolveQueue.removeRequest(nsdServiceInfo, ServiceListener.this);
+                    printerRemoved(nsdServiceInfo);
+                }
+            };
+            mNSDManager.discoverServices(service, NsdManager.PROTOCOL_DNS_SD, listener);
+            mListeners.add(listener);
+        }
+    }
+
+    public void stop() {
+        for(NsdManager.DiscoveryListener listener : mListeners) {
+            mNSDManager.stopServiceDiscovery(listener);
+        }
+        mVendorHashMap.clear();
+        mListeners.clear();
+    }
+
+    public Pair<Integer, Integer> getCount() {
+        int count = 0;
+        for (PrinterHashMap map : mVendorHashMap.values()) {
+            count += map.size();
+        }
+        return Pair.create(mVendorHashMap.size(), count);
+    }
+}
diff --git a/SamsungPrinterRecommendation/app/src/main/java/com/android/discovery/recommendation/ServiceRecommendationPlugin.java b/SamsungPrinterRecommendation/app/src/main/java/com/android/discovery/recommendation/ServiceRecommendationPlugin.java
new file mode 100644
index 0000000..fcb7ad0
--- /dev/null
+++ b/SamsungPrinterRecommendation/app/src/main/java/com/android/discovery/recommendation/ServiceRecommendationPlugin.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2016 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.android.discovery.recommendation;
+
+import android.content.Context;
+import android.net.nsd.NsdManager;
+import android.net.nsd.NsdServiceInfo;
+import android.support.annotation.NonNull;
+import android.text.TextUtils;
+
+public abstract class ServiceRecommendationPlugin implements PrintServicePlugin, ServiceListener.Observer {
+
+    protected static final String PDL_ATTRIBUTE = "pdl";
+
+    protected final Object mLock = new Object();
+    protected PrinterDiscoveryCallback mCallback = null;
+    protected final ServiceListener mListener;
+    protected final NsdManager mNSDManager;
+    protected final VendorInfo mVendorInfo;
+    private final int mVendorStringID;
+
+    protected ServiceRecommendationPlugin(Context context, int vendorStringID, VendorInfo vendorInfo, String[] services) {
+        mNSDManager = (NsdManager)context.getSystemService(Context.NSD_SERVICE);
+        mVendorStringID = vendorStringID;
+        mVendorInfo = vendorInfo;
+        mListener = new ServiceListener(context, this, services);
+    }
+
+    @Override
+    public int getName() {
+        return mVendorStringID;
+    }
+
+    @NonNull
+    @Override
+    public CharSequence getPackageName() {
+        return mVendorInfo.mPackageName;
+    }
+
+    @Override
+    public void start(@NonNull PrinterDiscoveryCallback callback) throws Exception {
+        synchronized (mLock) {
+            mCallback = callback;
+        }
+        mListener.start();
+    }
+
+    @Override
+    public void stop() throws Exception {
+        synchronized (mLock) {
+            mCallback = null;
+        }
+        mListener.stop();
+    }
+
+    @Override
+    public void dataSetChanged() {
+        synchronized (mLock) {
+            if (mCallback != null) mCallback.onChanged(getCount());
+        }
+    }
+
+    @Override
+    public boolean matchesCriteria(String vendor, NsdServiceInfo nsdServiceInfo) {
+        return TextUtils.equals(vendor, mVendorInfo.mVendorID);
+    }
+
+    public int getCount() {
+        return mListener.getCount().second;
+    }
+}
diff --git a/SamsungPrinterRecommendation/app/src/main/java/com/android/discovery/recommendation/ServiceResolveQueue.java b/SamsungPrinterRecommendation/app/src/main/java/com/android/discovery/recommendation/ServiceResolveQueue.java
new file mode 100644
index 0000000..cdfd937
--- /dev/null
+++ b/SamsungPrinterRecommendation/app/src/main/java/com/android/discovery/recommendation/ServiceResolveQueue.java
@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2006 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.android.discovery.recommendation;
+
+import android.net.nsd.NsdManager;
+import android.net.nsd.NsdServiceInfo;
+import android.util.Pair;
+
+import java.util.LinkedList;
+
+public final class ServiceResolveQueue {
+
+    private final NsdManager mNsdManager;
+    private final LinkedList<Pair<NsdServiceInfo, ResolveCallback>> mQueue = new LinkedList<>();
+    private final Object mLock = new Object();
+
+    private static ServiceResolveQueue sInstance = null;
+    private Pair<NsdServiceInfo, ResolveCallback> mCurrentRequest = null;
+
+    public static void createInstance(NsdManager nsdManager) {
+        if (sInstance == null) sInstance = new ServiceResolveQueue(nsdManager);
+    }
+
+    public static ServiceResolveQueue getInstance() {
+        return sInstance;
+    }
+
+    public static void destroyInstance() {
+        sInstance = null;
+    }
+
+    public interface ResolveCallback {
+        void serviceResolved(NsdServiceInfo nsdServiceInfo);
+    }
+
+    public ServiceResolveQueue(NsdManager nsdManager) {
+        mNsdManager = nsdManager;
+    }
+
+    public void queueRequest(NsdServiceInfo serviceInfo, ResolveCallback callback) {
+        synchronized (mLock) {
+            Pair<NsdServiceInfo, ResolveCallback> newRequest = Pair.create(serviceInfo, callback);
+            if (mQueue.contains(newRequest)) return;
+            mQueue.add(newRequest);
+            makeNextRequest();
+        }
+    }
+
+    public void removeRequest(NsdServiceInfo serviceInfo, ResolveCallback callback) {
+        synchronized (mLock) {
+            Pair<NsdServiceInfo, ResolveCallback> newRequest = Pair.create(serviceInfo, callback);
+            mQueue.remove(newRequest);
+            if ((mCurrentRequest != null) && newRequest.equals(mCurrentRequest)) mCurrentRequest = null;
+        }
+    }
+
+    private void makeNextRequest() {
+        synchronized (mLock) {
+            if (mCurrentRequest != null) return;
+            if (mQueue.isEmpty()) return;
+            mCurrentRequest = mQueue.removeFirst();
+            mNsdManager.resolveService(mCurrentRequest.first, new NsdManager.ResolveListener() {
+                @Override
+                public void onResolveFailed(NsdServiceInfo nsdServiceInfo, int i) {
+                    synchronized (mLock) {
+                        if (mCurrentRequest != null) mQueue.add(mCurrentRequest);
+                        makeNextRequest();
+                    }
+                }
+
+                @Override
+                public void onServiceResolved(NsdServiceInfo nsdServiceInfo) {
+                    synchronized (mLock) {
+                        if (mCurrentRequest != null) {
+                            mCurrentRequest.second.serviceResolved(nsdServiceInfo);
+                            mCurrentRequest = null;
+                        }
+                        makeNextRequest();
+                    }
+                }
+            });
+
+        }
+    }
+
+
+}
diff --git a/SamsungPrinterRecommendation/app/src/main/java/com/android/discovery/recommendation/VendorInfo.java b/SamsungPrinterRecommendation/app/src/main/java/com/android/discovery/recommendation/VendorInfo.java
new file mode 100644
index 0000000..595e048
--- /dev/null
+++ b/SamsungPrinterRecommendation/app/src/main/java/com/android/discovery/recommendation/VendorInfo.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2016 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.android.discovery.recommendation;
+
+import android.content.res.Resources;
+
+import java.util.Arrays;
+
+public final class VendorInfo {
+
+    public final String mPackageName;
+    public final String mVendorID;
+    public final String[] mDNSValues;
+    public final int mID;
+
+    public VendorInfo(Resources resources, int vendor_info_id) {
+        mID = vendor_info_id;
+        String[] data = resources.getStringArray(vendor_info_id);
+        if ((data == null) || (data.length < 2)) {
+            data = new String[] { null, null };
+        }
+        mPackageName = data[0];
+        mVendorID = data[1];
+        mDNSValues = (data.length > 2) ? Arrays.copyOfRange(data, 2, data.length) : new String[]{};
+    }
+}
diff --git a/SamsungPrinterRecommendation/app/src/main/java/com/example/android/discovery/recommendation/DeviceList.java b/SamsungPrinterRecommendation/app/src/main/java/com/example/android/discovery/recommendation/DeviceList.java
new file mode 100644
index 0000000..2eeebc4
--- /dev/null
+++ b/SamsungPrinterRecommendation/app/src/main/java/com/example/android/discovery/recommendation/DeviceList.java
@@ -0,0 +1,32 @@
+/*
+ * (c) Copyright 2016 Mopria Alliance, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.example.android.discovery.recommendation;
+
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.Toolbar;
+
+public class DeviceList extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_device_list2);
+        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
+        setSupportActionBar(toolbar);
+    }
+}
diff --git a/SamsungPrinterRecommendation/app/src/main/java/com/example/android/discovery/recommendation/DeviceListFragment.java b/SamsungPrinterRecommendation/app/src/main/java/com/example/android/discovery/recommendation/DeviceListFragment.java
new file mode 100644
index 0000000..94a6cb5
--- /dev/null
+++ b/SamsungPrinterRecommendation/app/src/main/java/com/example/android/discovery/recommendation/DeviceListFragment.java
@@ -0,0 +1,118 @@
+/*
+ * (c) Copyright 2016 Mopria Alliance, Inc.
+ * (c) Copyright 2016 Samsung Electronics..
+ *
+ * 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.example.android.discovery.recommendation;
+
+import android.content.Context;
+import android.net.nsd.NsdManager;
+import android.os.Bundle;
+import android.support.annotation.IntRange;
+import android.support.v4.app.ListFragment;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ArrayAdapter;
+import android.widget.TextView;
+
+import com.android.discovery.recommendation.PrintServicePlugin;
+import com.android.discovery.recommendation.ServiceRecommendationPlugin;
+import com.android.discovery.recommendation.ServiceResolveQueue;
+import com.samsung.discovery.recommendation.SamsungRecommendationPlugin;
+
+import java.util.Locale;
+
+public class DeviceListFragment extends ListFragment implements PrintServicePlugin.PrinterDiscoveryCallback {
+
+    private ArrayAdapter<ServiceRecommendationPlugin> mArrayAdapter;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        ServiceResolveQueue.createInstance((NsdManager)getActivity().getSystemService(Context.NSD_SERVICE));
+        mArrayAdapter = new ArrayAdapter<ServiceRecommendationPlugin>(getActivity(), 0) {
+
+            class ViewHolder {
+                final TextView mText1;
+                final TextView mText2;
+                public ViewHolder(TextView text1, TextView text2) {
+                    mText1 = text1;
+                    mText2 = text2;
+                }
+            }
+
+            @Override
+            public View getView(int position, View convertView, ViewGroup parent) {
+                View view;
+                ViewHolder holder;
+                if (convertView == null) {
+                    view = getActivity().getLayoutInflater().inflate(android.R.layout.simple_list_item_2, parent, false);
+                    view.setTag(new ViewHolder((TextView)view.findViewById(android.R.id.text1),
+                            (TextView)view.findViewById(android.R.id.text2)));
+                } else {
+                    view = convertView;
+                }
+                holder = (ViewHolder)view.getTag();
+                holder.mText1.setText(getItem(position).getName());
+                holder.mText2.setText(String.format(Locale.getDefault(), "%d",getItem(position).getCount()));
+                return view;
+            }
+        };
+        mArrayAdapter.add(new SamsungRecommendationPlugin(getActivity()));
+    }
+
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
+        ServiceResolveQueue.destroyInstance();
+    }
+
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        for(int i = 0; i < mArrayAdapter.getCount(); i++) {
+            try {
+                mArrayAdapter.getItem(i).start(this);
+            } catch(Exception ignored) {}
+        }
+    }
+
+    @Override
+    public void onPause() {
+        super.onPause();
+        for(int i = 0; i < mArrayAdapter.getCount(); i++) {
+            try {
+                mArrayAdapter.getItem(i).stop();
+            } catch(Exception ignored) {}
+        }
+    }
+
+    @Override
+    public void onViewCreated(View view, Bundle savedInstanceState) {
+        super.onViewCreated(view, savedInstanceState);
+        setListAdapter(mArrayAdapter);
+    }
+
+    @Override
+    public void onChanged(@IntRange(from = 0) int numDiscoveredPrinters) {
+        getActivity().runOnUiThread(new Runnable() {
+            @Override
+            public void run() {
+                mArrayAdapter.notifyDataSetChanged();
+            }
+        });
+    }
+}
diff --git a/SamsungPrinterRecommendation/app/src/main/java/com/samsung/discovery/recommendation/SamsungRecommendationPlugin.java b/SamsungPrinterRecommendation/app/src/main/java/com/samsung/discovery/recommendation/SamsungRecommendationPlugin.java
new file mode 100644
index 0000000..f5daa6a
--- /dev/null
+++ b/SamsungPrinterRecommendation/app/src/main/java/com/samsung/discovery/recommendation/SamsungRecommendationPlugin.java
@@ -0,0 +1,105 @@
+/*

+(c) Copyright 2016 Samsung Electronics..

+

+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.samsung.discovery.recommendation;

+

+import android.content.Context;

+import android.net.nsd.NsdServiceInfo;

+import android.text.TextUtils;

+

+import com.android.discovery.recommendation.MDnsUtils;

+import com.android.discovery.recommendation.ServiceRecommendationPlugin;

+import com.android.discovery.recommendation.VendorInfo;

+import com.example.android.discovery.recommendation.R;

+

+import java.util.Locale;

+import java.util.Map;

+

+public class SamsungRecommendationPlugin extends ServiceRecommendationPlugin {

+

+    private static final String TAG = "SamsungRecommendation";

+

+    private static final String ATTR_USB_MFG = "usb_MFG";

+    private static final String ATTR_MFG = "mfg";

+    private static final String ATTR_USB_MDL = "usb_MDL";

+    private static final String ATTR_MDL = "mdl";

+    private static final String ATTR_PRODUCT = "product";

+    private static final String ATTR_TY = "ty";

+

+    private static String[] mNotSupportedDevices = new String[]{

+            "SCX-5x15",

+            "SF-555P",

+            "CF-555P",

+            "SCX-4x16",

+            "SCX-4214F",

+            "CLP-500",

+            "CJX-",

+            "MJC-"

+    };

+

+    private static boolean isSupportedModel(String model) {

+        if (!TextUtils.isEmpty(model)) {

+            String modelToUpper = model.toUpperCase(Locale.US);

+            for (String unSupportedPrinter : mNotSupportedDevices) {

+                if (modelToUpper.contains(unSupportedPrinter)) {

+                    return  false;

+                }

+            }

+        }

+        return true;

+    }

+

+    public SamsungRecommendationPlugin(Context context) {

+        super(context, R.string.plugin_vendor_samsung, new VendorInfo(context.getResources(), R.array.known_print_vendor_info_for_samsung), new String[]{"_pdl-datastream._tcp"});

+    }

+

+    @Override

+    public boolean matchesCriteria(String vendor, NsdServiceInfo nsdServiceInfo) {

+        if (!TextUtils.equals(vendor, mVendorInfo.mVendorID)) return false;

+

+        String modelName = getModelName(nsdServiceInfo);

+        if (modelName != null) {

+            return (isSupportedModel(modelName));

+        }

+        return false;

+    }

+

+    private String getModelName(NsdServiceInfo resolvedDevice) {

+        Map<String,byte[]> attributes = resolvedDevice.getAttributes();

+        String usb_mfg = MDnsUtils.getString(attributes.get(ATTR_USB_MFG));

+        if (TextUtils.isEmpty(usb_mfg)) {

+            usb_mfg = MDnsUtils.getString(attributes.get(ATTR_MFG));

+        }

+

+        String usb_mdl = MDnsUtils.getString(attributes.get(ATTR_USB_MDL));

+        if (TextUtils.isEmpty(usb_mdl)) {

+            usb_mdl = MDnsUtils.getString(attributes.get(ATTR_MDL));

+        }

+

+        String modelName = null;

+        if (!TextUtils.isEmpty(usb_mfg) && !TextUtils.isEmpty(usb_mdl)) {

+            modelName = usb_mfg.trim() + " " + usb_mdl.trim();

+        } else {

+            modelName = MDnsUtils.getString(attributes.get(ATTR_PRODUCT));

+            if (TextUtils.isEmpty(modelName)) {

+                modelName = MDnsUtils.getString(attributes.get(ATTR_TY));

+            }

+        }

+

+        return modelName;

+    }

+}

diff --git a/SamsungPrinterRecommendation/app/src/main/res/layout/activity_device_list2.xml b/SamsungPrinterRecommendation/app/src/main/res/layout/activity_device_list2.xml
new file mode 100644
index 0000000..62f06d2
--- /dev/null
+++ b/SamsungPrinterRecommendation/app/src/main/res/layout/activity_device_list2.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.design.widget.CoordinatorLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
+    android:layout_height="match_parent" android:fitsSystemWindows="true"
+    tools:context="com.example.android.discovery.recommendation.DeviceList">
+
+    <android.support.design.widget.AppBarLayout android:layout_height="wrap_content"
+        android:layout_width="match_parent" android:theme="@style/AppTheme.AppBarOverlay">
+
+        <android.support.v7.widget.Toolbar android:id="@+id/toolbar"
+            android:layout_width="match_parent" android:layout_height="?attr/actionBarSize"
+            android:background="?attr/colorPrimary" app:popupTheme="@style/AppTheme.PopupOverlay" />
+
+    </android.support.design.widget.AppBarLayout>
+
+    <include layout="@layout/content_device_list" />
+
+</android.support.design.widget.CoordinatorLayout>
diff --git a/SamsungPrinterRecommendation/app/src/main/res/layout/content_device_list.xml b/SamsungPrinterRecommendation/app/src/main/res/layout/content_device_list.xml
new file mode 100644
index 0000000..67e13ed
--- /dev/null
+++ b/SamsungPrinterRecommendation/app/src/main/res/layout/content_device_list.xml
@@ -0,0 +1,7 @@
+<fragment xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    xmlns:app="http://schemas.android.com/apk/res-auto" android:id="@+id/fragment"
+    android:name="com.example.android.discovery.recommendation.DeviceListFragment" android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    app:layout_behavior="@string/appbar_scrolling_view_behavior"
+    tools:layout="@layout/fragment_device_list" />
diff --git a/SamsungPrinterRecommendation/app/src/main/res/layout/fragment_device_list.xml b/SamsungPrinterRecommendation/app/src/main/res/layout/fragment_device_list.xml
new file mode 100644
index 0000000..f6820da
--- /dev/null
+++ b/SamsungPrinterRecommendation/app/src/main/res/layout/fragment_device_list.xml
@@ -0,0 +1,11 @@
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
+    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
+    android:paddingRight="@dimen/activity_horizontal_margin"
+    android:paddingTop="@dimen/activity_vertical_margin"
+    android:paddingBottom="@dimen/activity_vertical_margin"
+    tools:showIn="@layout/activity_device_list2"
+    tools:context="com.example.android.discovery.recommendation.DeviceListFragment">
+
+
+</RelativeLayout>
diff --git a/SamsungPrinterRecommendation/app/src/main/res/mipmap-hdpi/ic_launcher.png b/SamsungPrinterRecommendation/app/src/main/res/mipmap-hdpi/ic_launcher.png
new file mode 100644
index 0000000..cde69bc
--- /dev/null
+++ b/SamsungPrinterRecommendation/app/src/main/res/mipmap-hdpi/ic_launcher.png
diff --git a/SamsungPrinterRecommendation/app/src/main/res/mipmap-mdpi/ic_launcher.png b/SamsungPrinterRecommendation/app/src/main/res/mipmap-mdpi/ic_launcher.png
new file mode 100644
index 0000000..c133a0c
--- /dev/null
+++ b/SamsungPrinterRecommendation/app/src/main/res/mipmap-mdpi/ic_launcher.png
diff --git a/SamsungPrinterRecommendation/app/src/main/res/mipmap-xhdpi/ic_launcher.png b/SamsungPrinterRecommendation/app/src/main/res/mipmap-xhdpi/ic_launcher.png
new file mode 100644
index 0000000..bfa42f0
--- /dev/null
+++ b/SamsungPrinterRecommendation/app/src/main/res/mipmap-xhdpi/ic_launcher.png
diff --git a/SamsungPrinterRecommendation/app/src/main/res/mipmap-xxhdpi/ic_launcher.png b/SamsungPrinterRecommendation/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
new file mode 100644
index 0000000..324e72c
--- /dev/null
+++ b/SamsungPrinterRecommendation/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
diff --git a/SamsungPrinterRecommendation/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png b/SamsungPrinterRecommendation/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
new file mode 100644
index 0000000..aee44e1
--- /dev/null
+++ b/SamsungPrinterRecommendation/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
diff --git a/SamsungPrinterRecommendation/app/src/main/res/values-v21/styles.xml b/SamsungPrinterRecommendation/app/src/main/res/values-v21/styles.xml
new file mode 100644
index 0000000..65d0c39
--- /dev/null
+++ b/SamsungPrinterRecommendation/app/src/main/res/values-v21/styles.xml
@@ -0,0 +1,8 @@
+<resources>>
+    <style name="AppTheme.NoActionBar">
+        <item name="windowActionBar">false</item>
+        <item name="windowNoTitle">true</item>
+        <item name="android:windowDrawsSystemBarBackgrounds">true</item>
+        <item name="android:statusBarColor">@android:color/transparent</item>
+    </style>
+</resources>
diff --git a/SamsungPrinterRecommendation/app/src/main/res/values-w820dp/dimens.xml b/SamsungPrinterRecommendation/app/src/main/res/values-w820dp/dimens.xml
new file mode 100644
index 0000000..63fc816
--- /dev/null
+++ b/SamsungPrinterRecommendation/app/src/main/res/values-w820dp/dimens.xml
@@ -0,0 +1,6 @@
+<resources>
+    <!-- Example customization of dimensions originally defined in res/values/dimens.xml
+         (such as screen margins) for screens with more than 820dp of available width. This
+         would include 7" and 10" devices in landscape (~960dp and ~1280dp respectively). -->
+    <dimen name="activity_horizontal_margin">64dp</dimen>
+</resources>
diff --git a/SamsungPrinterRecommendation/app/src/main/res/values/colors.xml b/SamsungPrinterRecommendation/app/src/main/res/values/colors.xml
new file mode 100644
index 0000000..3ab3e9c
--- /dev/null
+++ b/SamsungPrinterRecommendation/app/src/main/res/values/colors.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="colorPrimary">#3F51B5</color>
+    <color name="colorPrimaryDark">#303F9F</color>
+    <color name="colorAccent">#FF4081</color>
+</resources>
diff --git a/SamsungPrinterRecommendation/app/src/main/res/values/dimens.xml b/SamsungPrinterRecommendation/app/src/main/res/values/dimens.xml
new file mode 100644
index 0000000..47c8224
--- /dev/null
+++ b/SamsungPrinterRecommendation/app/src/main/res/values/dimens.xml
@@ -0,0 +1,5 @@
+<resources>
+    <!-- Default screen margins, per the Android Design guidelines. -->
+    <dimen name="activity_horizontal_margin">16dp</dimen>
+    <dimen name="activity_vertical_margin">16dp</dimen>
+</resources>
diff --git a/SamsungPrinterRecommendation/app/src/main/res/values/donottranslate.xml b/SamsungPrinterRecommendation/app/src/main/res/values/donottranslate.xml
new file mode 100644
index 0000000..1966117
--- /dev/null
+++ b/SamsungPrinterRecommendation/app/src/main/res/values/donottranslate.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources xmlns:tools="http://schemas.android.com/tools">
+        <string-array name="known_print_vendor_info_for_mopria" translatable="false">
+        <item>org.mopria.printplugin</item>
+        <item>WFDS</item>
+        <!-- no specific mDNS values to list -->
+    </string-array>
+
+    <string-array name="known_print_vendor_info_for_hp" translatable="false">
+        <item>com.hp.android.printservice</item>
+        <item>HP</item>
+        <!-- HP has used these values in mDNS records over the years -->
+        <item>HP</item>
+        <item>Hewlett-Packard</item>
+        <item>Hewlett Packard</item>
+    </string-array>
+
+    <string-array name="known_print_vendor_info_for_samsung" translatable="false">
+        <item>com.sec.app.samsungprintservice</item>
+        <item>Samsung Electronics</item>
+        <item>Samsung</item>
+    </string-array>
+
+
+    <array name="known_print_plugin_vendors" translatable="false">
+        <item>@array/known_print_vendor_info_for_mopria</item>
+        <item>@array/known_print_vendor_info_for_hp</item>
+        <item>@array/known_print_vendor_info_for_samsung</item>
+    </array>
+</resources>
diff --git a/SamsungPrinterRecommendation/app/src/main/res/values/strings.xml b/SamsungPrinterRecommendation/app/src/main/res/values/strings.xml
new file mode 100644
index 0000000..d0af03a
--- /dev/null
+++ b/SamsungPrinterRecommendation/app/src/main/res/values/strings.xml
@@ -0,0 +1,7 @@
+<resources>
+    <string name="app_name">AndroidDiscovery</string>
+    <string name="title_activity_device_list">DeviceList</string>
+    <string name="plugin_vendor_morpia">Mopria</string>
+    <string name="plugin_vendor_hp">HP</string>
+    <string name="plugin_vendor_samsung">Samsung</string>
+</resources>
diff --git a/SamsungPrinterRecommendation/app/src/main/res/values/styles.xml b/SamsungPrinterRecommendation/app/src/main/res/values/styles.xml
new file mode 100644
index 0000000..44f664f
--- /dev/null
+++ b/SamsungPrinterRecommendation/app/src/main/res/values/styles.xml
@@ -0,0 +1,17 @@
+<resources>
+
+    <!-- Base application theme. -->
+    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
+        <!-- Customize your theme here. -->
+        <item name="colorPrimary">@color/colorPrimary</item>
+        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
+        <item name="colorAccent">@color/colorAccent</item>
+    </style>
+    <style name="AppTheme.NoActionBar">
+        <item name="windowActionBar">false</item>
+        <item name="windowNoTitle">true</item>
+    </style>
+    <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
+    <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
+
+</resources>
diff --git a/SamsungPrinterRecommendation/build.gradle b/SamsungPrinterRecommendation/build.gradle
new file mode 100644
index 0000000..03bced9
--- /dev/null
+++ b/SamsungPrinterRecommendation/build.gradle
@@ -0,0 +1,23 @@
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+
+buildscript {
+    repositories {
+        jcenter()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:2.1.0'
+
+        // NOTE: Do not place your application dependencies here; they belong
+        // in the individual module build.gradle files
+    }
+}
+
+allprojects {
+    repositories {
+        jcenter()
+    }
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}
diff --git a/SamsungPrinterRecommendation/gradle/wrapper/gradle-wrapper.jar b/SamsungPrinterRecommendation/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..8c0fb64
--- /dev/null
+++ b/SamsungPrinterRecommendation/gradle/wrapper/gradle-wrapper.jar
diff --git a/SamsungPrinterRecommendation/gradle/wrapper/gradle-wrapper.properties b/SamsungPrinterRecommendation/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..04b1b82
--- /dev/null
+++ b/SamsungPrinterRecommendation/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,6 @@
+#Thu Oct 01 09:52:57 PDT 2015
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-2.12-all.zip
diff --git a/SamsungPrinterRecommendation/gradlew b/SamsungPrinterRecommendation/gradlew
new file mode 100644
index 0000000..91a7e26
--- /dev/null
+++ b/SamsungPrinterRecommendation/gradlew
@@ -0,0 +1,164 @@
+#!/usr/bin/env bash
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn ( ) {
+    echo "$*"
+}
+
+die ( ) {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+esac
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched.
+if $cygwin ; then
+    [ -n "$JAVA_HOME" ] && JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
+fi
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >&-
+APP_HOME="`pwd -P`"
+cd "$SAVED" >&-
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
+function splitJvmOpts() {
+    JVM_OPTS=("$@")
+}
+eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
+JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
+
+exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"
diff --git a/SamsungPrinterRecommendation/gradlew.bat b/SamsungPrinterRecommendation/gradlew.bat
new file mode 100644
index 0000000..8a0b282
--- /dev/null
+++ b/SamsungPrinterRecommendation/gradlew.bat
@@ -0,0 +1,90 @@
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS=
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windowz variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+if "%@eval[2+2]" == "4" goto 4NT_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+goto execute
+
+:4NT_args
+@rem Get arguments from the 4NT Shell from JP Software
+set CMD_LINE_ARGS=%$
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/SamsungPrinterRecommendation/settings.gradle b/SamsungPrinterRecommendation/settings.gradle
new file mode 100644
index 0000000..e7b4def
--- /dev/null
+++ b/SamsungPrinterRecommendation/settings.gradle
@@ -0,0 +1 @@
+include ':app'