Adds AppUsageStatistics sample

Change-Id: Id16e91f8af13ab5c6da173047a09f4804ca885c5

35 files changed, 1261 insertions, 0 deletions

diff --git a/system/AppUsageStatistics/Application/.gitignore b/system/AppUsageStatistics/Application/.gitignore
new file mode 100644
index 00000000..6eb878d4
--- /dev/null
+++ b/system/AppUsageStatistics/Application/.gitignore
@@ -0,0 +1,16 @@
+# Copyright 2013 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.
+src/template/
+src/common/
+build.gradle
diff --git a/system/AppUsageStatistics/Application/proguard-project.txt b/system/AppUsageStatistics/Application/proguard-project.txt
new file mode 100644
index 00000000..0d8f171d
--- /dev/null
+++ b/system/AppUsageStatistics/Application/proguard-project.txt
@@ -0,0 +1,20 @@
+ To enable ProGuard in your project, edit project.properties
+# to define the proguard.config property as described in that file.
+#
+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in ${sdk.dir}/tools/proguard/proguard-android.txt
+# You can edit the include path and order by changing the ProGuard
+# include property in project.properties.
+#
+# 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/system/AppUsageStatistics/Application/src/main/AndroidManifest.xml b/system/AppUsageStatistics/Application/src/main/AndroidManifest.xml
new file mode 100644
index 00000000..2726b4a2
--- /dev/null
+++ b/system/AppUsageStatistics/Application/src/main/AndroidManifest.xml
@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ Copyright 2014 The Android Open Source Project
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.android.appusagestatistics"
+    android:versionCode="1"
+    android:versionName="1.0">
+
+    <uses-permission android:name="android.permission.PACKAGE_USAGE_STATS"/>
+
+    <application android:allowBackup="true"
+        android:label="@string/app_name"
+        android:icon="@drawable/ic_launcher"
+        android:theme="@style/Theme.AppCompat.Light">
+
+        <activity android:name=".AppUsageStatisticsActivity"
+                  android:label="@string/app_name">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+</manifest>
diff --git a/system/AppUsageStatistics/Application/src/main/java/com/example/android/appusagestatistics/AppUsageStatisticsActivity.java b/system/AppUsageStatistics/Application/src/main/java/com/example/android/appusagestatistics/AppUsageStatisticsActivity.java
new file mode 100644
index 00000000..4def465f
--- /dev/null
+++ b/system/AppUsageStatistics/Application/src/main/java/com/example/android/appusagestatistics/AppUsageStatisticsActivity.java
@@ -0,0 +1,37 @@
+/*
+* Copyright 2014 The Android Open Source Project
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+package com.example.android.appusagestatistics;
+
+import android.os.Bundle;
+import android.support.v7.app.ActionBarActivity;
+
+/**
+ * Launcher Activity for the App Usage Statistics sample app.
+ */
+public class AppUsageStatisticsActivity extends ActionBarActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_app_usage_statistics);
+        if (savedInstanceState == null) {
+            getSupportFragmentManager().beginTransaction()
+                    .add(R.id.container, AppUsageStatisticsFragment.newInstance())
+                    .commit();
+        }
+    }
+}
\ No newline at end of file
diff --git a/system/AppUsageStatistics/Application/src/main/java/com/example/android/appusagestatistics/AppUsageStatisticsFragment.java b/system/AppUsageStatistics/Application/src/main/java/com/example/android/appusagestatistics/AppUsageStatisticsFragment.java
new file mode 100644
index 00000000..50a72e77
--- /dev/null
+++ b/system/AppUsageStatistics/Application/src/main/java/com/example/android/appusagestatistics/AppUsageStatisticsFragment.java
@@ -0,0 +1,230 @@
+/*
+* Copyright 2014 The Android Open Source Project
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+package com.example.android.appusagestatistics;
+
+import android.app.usage.UsageStats;
+import android.app.usage.UsageStatsManager;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.graphics.drawable.Drawable;
+import android.os.Bundle;
+import android.provider.Settings;
+import android.support.v4.app.Fragment;
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.AdapterView;
+import android.widget.ArrayAdapter;
+import android.widget.Button;
+import android.widget.Spinner;
+import android.widget.SpinnerAdapter;
+import android.widget.Toast;
+
+import java.util.ArrayList;
+import java.util.Calendar;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+
+/**
+ * Fragment that demonstrates how to use App Usage Statistics API.
+ */
+public class AppUsageStatisticsFragment extends Fragment {
+
+    private static final String TAG = AppUsageStatisticsFragment.class.getSimpleName();
+
+    //VisibleForTesting for variables below
+    UsageStatsManager mUsageStatsManager;
+    UsageListAdapter mUsageListAdapter;
+    RecyclerView mRecyclerView;
+    RecyclerView.LayoutManager mLayoutManager;
+    Button mOpenUsageSettingButton;
+    Spinner mSpinner;
+
+    /**
+     * Use this factory method to create a new instance of
+     * this fragment using the provided parameters.
+     *
+     * @return A new instance of fragment {@link AppUsageStatisticsFragment}.
+     */
+    public static AppUsageStatisticsFragment newInstance() {
+        AppUsageStatisticsFragment fragment = new AppUsageStatisticsFragment();
+        return fragment;
+    }
+
+    public AppUsageStatisticsFragment() {
+        // Required empty public constructor
+    }
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        mUsageStatsManager = (UsageStatsManager) getActivity()
+                .getSystemService("usagestats"); //Context.USAGE_STATS_SERVICE
+    }
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+            Bundle savedInstanceState) {
+        return inflater.inflate(R.layout.fragment_app_usage_statistics, container, false);
+    }
+
+    @Override
+    public void onViewCreated(View rootView, Bundle savedInstanceState) {
+        super.onViewCreated(rootView, savedInstanceState);
+
+        mLayoutManager = new LinearLayoutManager(getActivity());
+        mUsageListAdapter = new UsageListAdapter();
+        mRecyclerView = (RecyclerView) rootView.findViewById(R.id.recyclerview_app_usage);
+        mRecyclerView.setLayoutManager(mLayoutManager);
+        mRecyclerView.scrollToPosition(0);
+        mRecyclerView.setAdapter(mUsageListAdapter);
+        mOpenUsageSettingButton = (Button) rootView.findViewById(R.id.button_open_usage_setting);
+        mSpinner = (Spinner) rootView.findViewById(R.id.spinner_time_span);
+        SpinnerAdapter spinnerAdapter = ArrayAdapter.createFromResource(getActivity(),
+                R.array.action_list, android.R.layout.simple_spinner_dropdown_item);
+        mSpinner.setAdapter(spinnerAdapter);
+        mSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
+
+            String[] strings = getResources().getStringArray(R.array.action_list);
+
+            @Override
+            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
+                StatsUsageInterval statsUsageInterval = StatsUsageInterval.getValue(strings[position]);
+                if (statsUsageInterval != null ) {
+                    List<UsageStats> usageStatsList =
+                            getUsageStatistics(statsUsageInterval.mInterval);
+                    Collections.sort(usageStatsList, new LastTimeLaunchedComparatorDesc());
+                    updateAppsList(usageStatsList);
+                }
+            }
+
+            @Override
+            public void onNothingSelected(AdapterView<?> parent) {
+            }
+        });
+        getUsageStatistics(UsageStatsManager.INTERVAL_DAILY);
+    }
+
+    /**
+     * Returns the {@link #mRecyclerView} sorted by the timestamp of the last time used
+     * including the time span specified by the intervalType argument.
+     *
+     * @param intervalType The time interval by which the stats are aggregated.
+     *                     Corresponding to the value of {@link UsageStatsManager}.
+     *                     E.g. {@link UsageStatsManager#INTERVAL_DAILY}, {@link
+     *                     UsageStatsManager#INTERVAL_WEEKLY},
+     */
+    public List<UsageStats> getUsageStatistics(int intervalType) {
+        // Get the app statistics since one year ago from the current time.
+        Calendar cal = Calendar.getInstance();
+        cal.add(Calendar.YEAR, -1);
+
+        List<UsageStats> queryUsageStats = mUsageStatsManager
+                .queryUsageStats(intervalType, cal.getTimeInMillis(),
+                        System.currentTimeMillis());
+
+        if (queryUsageStats.size() == 0) {
+            Log.i(TAG, "The user may not allow the access to apps usage. ");
+            Toast.makeText(getActivity(),
+                    getString(R.string.explanation_access_to_appusage_is_not_enabled),
+                    Toast.LENGTH_LONG).show();
+            mOpenUsageSettingButton.setVisibility(View.VISIBLE);
+            mOpenUsageSettingButton.setOnClickListener(new View.OnClickListener() {
+                @Override
+                public void onClick(View v) {
+                    startActivity(new Intent(Settings.ACTION_USAGE_ACCESS_SETTINGS));
+                }
+            });
+        }
+        return queryUsageStats;
+    }
+
+    /**
+     * Updates the {@link #mRecyclerView} with the list of {@link UsageStats} passed as an argument.
+     *
+     * @param usageStatsList A list of {@link UsageStats} from which update the
+     *                       {@link #mRecyclerView}.
+     */
+    void updateAppsList(List<UsageStats> usageStatsList) {
+        List<CustomUsageStats> customUsageStatsList = new ArrayList<>();
+        for (int i = 0; i < usageStatsList.size(); i++) {
+            CustomUsageStats customUsageStats = new CustomUsageStats();
+            customUsageStats.usageStats = usageStatsList.get(i);
+            try {
+                Drawable appIcon = getActivity().getPackageManager()
+                        .getApplicationIcon(customUsageStats.usageStats.getPackageName());
+                customUsageStats.appIcon = appIcon;
+            } catch (PackageManager.NameNotFoundException e) {
+                Log.w(TAG, String.format("App Icon is not found for %s",
+                        customUsageStats.usageStats.getPackageName()));
+                customUsageStats.appIcon = getActivity()
+                        .getDrawable(R.drawable.ic_default_app_launcher);
+            }
+            customUsageStatsList.add(customUsageStats);
+        }
+        mUsageListAdapter.setCustomUsageStatsList(customUsageStatsList);
+        mUsageListAdapter.notifyDataSetChanged();
+        mRecyclerView.scrollToPosition(0);
+    }
+
+    /**
+     * The {@link Comparator} to sort a collection of {@link UsageStats} sorted by the timestamp
+     * last time the app was used in the descendant order.
+     */
+    private static class LastTimeLaunchedComparatorDesc implements Comparator<UsageStats> {
+
+        @Override
+        public int compare(UsageStats left, UsageStats right) {
+            return (int) (right.getLastTimeUsed() - left.getLastTimeUsed());
+        }
+    }
+
+    /**
+     * Enum represents the intervals for {@link android.app.usage.UsageStatsManager} so that
+     * values for intervals can be found by a String representation.
+     *
+     */
+    //VisibleForTesting
+    static enum StatsUsageInterval {
+        DAILY("Daily", UsageStatsManager.INTERVAL_DAILY),
+        WEEKLY("Weekly", UsageStatsManager.INTERVAL_WEEKLY),
+        MONTHLY("Monthly", UsageStatsManager.INTERVAL_MONTHLY),
+        YEARLY("Yearly", UsageStatsManager.INTERVAL_YEARLY);
+
+        private int mInterval;
+        private String mStringRepresentation;
+
+        StatsUsageInterval(String stringRepresentation, int interval) {
+            mStringRepresentation = stringRepresentation;
+            mInterval = interval;
+        }
+
+        static StatsUsageInterval getValue(String stringRepresentation) {
+            for (StatsUsageInterval statsUsageInterval : values()) {
+                if (statsUsageInterval.mStringRepresentation.equals(stringRepresentation)) {
+                    return statsUsageInterval;
+                }
+            }
+            return null;
+        }
+    }
+}
diff --git a/system/AppUsageStatistics/Application/src/main/java/com/example/android/appusagestatistics/CustomUsageStats.java b/system/AppUsageStatistics/Application/src/main/java/com/example/android/appusagestatistics/CustomUsageStats.java
new file mode 100644
index 00000000..b5b15c4e
--- /dev/null
+++ b/system/AppUsageStatistics/Application/src/main/java/com/example/android/appusagestatistics/CustomUsageStats.java
@@ -0,0 +1,28 @@
+/*
+* Copyright 2014 The Android Open Source Project
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+package com.example.android.appusagestatistics;
+
+import android.app.usage.UsageStats;
+import android.graphics.drawable.Drawable;
+
+/**
+ * Entity class represents usage stats and app icon.
+ */
+public class CustomUsageStats {
+    public UsageStats usageStats;
+    public Drawable appIcon;
+}
diff --git a/system/AppUsageStatistics/Application/src/main/java/com/example/android/appusagestatistics/UsageListAdapter.java b/system/AppUsageStatistics/Application/src/main/java/com/example/android/appusagestatistics/UsageListAdapter.java
new file mode 100644
index 00000000..ab1d0376
--- /dev/null
+++ b/system/AppUsageStatistics/Application/src/main/java/com/example/android/appusagestatistics/UsageListAdapter.java
@@ -0,0 +1,95 @@
+/*
+* Copyright (C) 2014 The Android Open Source Project
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*      http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+package com.example.android.appusagestatistics;
+
+import android.support.v7.widget.RecyclerView;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+
+/**
+ * Provide views to RecyclerView with the directory entries.
+ */
+public class UsageListAdapter extends RecyclerView.Adapter<UsageListAdapter.ViewHolder> {
+
+    private List<CustomUsageStats> mCustomUsageStatsList = new ArrayList<>();
+    private DateFormat mDateFormat = new SimpleDateFormat();
+
+    /**
+     * Provide a reference to the type of views that you are using (custom ViewHolder)
+     */
+    public static class ViewHolder extends RecyclerView.ViewHolder {
+        private final TextView mPackageName;
+        private final TextView mLastTimeUsed;
+        private final ImageView mAppIcon;
+
+        public ViewHolder(View v) {
+            super(v);
+            mPackageName = (TextView) v.findViewById(R.id.textview_package_name);
+            mLastTimeUsed = (TextView) v.findViewById(R.id.textview_last_time_used);
+            mAppIcon = (ImageView) v.findViewById(R.id.app_icon);
+        }
+
+        public TextView getLastTimeUsed() {
+            return mLastTimeUsed;
+        }
+
+        public TextView getPackageName() {
+            return mPackageName;
+        }
+
+        public ImageView getAppIcon() {
+            return mAppIcon;
+        }
+    }
+
+    public UsageListAdapter() {
+    }
+
+    @Override
+    public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
+        View v = LayoutInflater.from(viewGroup.getContext())
+                .inflate(R.layout.usage_row, viewGroup, false);
+        return new ViewHolder(v);
+    }
+
+    @Override
+    public void onBindViewHolder(ViewHolder viewHolder, final int position) {
+        viewHolder.getPackageName().setText(
+                mCustomUsageStatsList.get(position).usageStats.getPackageName());
+        long lastTimeUsed = mCustomUsageStatsList.get(position).usageStats.getLastTimeUsed();
+        viewHolder.getLastTimeUsed().setText(mDateFormat.format(new Date(lastTimeUsed)));
+        viewHolder.getAppIcon().setImageDrawable(mCustomUsageStatsList.get(position).appIcon);
+    }
+
+    @Override
+    public int getItemCount() {
+        return mCustomUsageStatsList.size();
+    }
+
+    public void setCustomUsageStatsList(List<CustomUsageStats> customUsageStats) {
+        mCustomUsageStatsList = customUsageStats;
+    }
+}
\ No newline at end of file
diff --git a/system/AppUsageStatistics/Application/src/main/res/drawable-hdpi/ic_default_app_launcher.png b/system/AppUsageStatistics/Application/src/main/res/drawable-hdpi/ic_default_app_launcher.png
new file mode 100644
index 00000000..96a442e5
--- /dev/null
+++ b/system/AppUsageStatistics/Application/src/main/res/drawable-hdpi/ic_default_app_launcher.png
diff --git a/system/AppUsageStatistics/Application/src/main/res/drawable-hdpi/ic_launcher.png b/system/AppUsageStatistics/Application/src/main/res/drawable-hdpi/ic_launcher.png
new file mode 100755
index 00000000..3cf5e8b4
--- /dev/null
+++ b/system/AppUsageStatistics/Application/src/main/res/drawable-hdpi/ic_launcher.png
diff --git a/system/AppUsageStatistics/Application/src/main/res/drawable-mdpi/ic_default_app_launcher.png b/system/AppUsageStatistics/Application/src/main/res/drawable-mdpi/ic_default_app_launcher.png
new file mode 100644
index 00000000..359047df
--- /dev/null
+++ b/system/AppUsageStatistics/Application/src/main/res/drawable-mdpi/ic_default_app_launcher.png
diff --git a/system/AppUsageStatistics/Application/src/main/res/drawable-mdpi/ic_launcher.png b/system/AppUsageStatistics/Application/src/main/res/drawable-mdpi/ic_launcher.png
new file mode 100755
index 00000000..51553c5d
--- /dev/null
+++ b/system/AppUsageStatistics/Application/src/main/res/drawable-mdpi/ic_launcher.png
diff --git a/system/AppUsageStatistics/Application/src/main/res/drawable-xhdpi/ic_default_app_launcher.png b/system/AppUsageStatistics/Application/src/main/res/drawable-xhdpi/ic_default_app_launcher.png
new file mode 100644
index 00000000..71c6d760
--- /dev/null
+++ b/system/AppUsageStatistics/Application/src/main/res/drawable-xhdpi/ic_default_app_launcher.png
diff --git a/system/AppUsageStatistics/Application/src/main/res/drawable-xhdpi/ic_launcher.png b/system/AppUsageStatistics/Application/src/main/res/drawable-xhdpi/ic_launcher.png
new file mode 100755
index 00000000..52480002
--- /dev/null
+++ b/system/AppUsageStatistics/Application/src/main/res/drawable-xhdpi/ic_launcher.png
diff --git a/system/AppUsageStatistics/Application/src/main/res/drawable-xxhdpi/ic_default_app_launcher.png b/system/AppUsageStatistics/Application/src/main/res/drawable-xxhdpi/ic_default_app_launcher.png
new file mode 100644
index 00000000..4df18946
--- /dev/null
+++ b/system/AppUsageStatistics/Application/src/main/res/drawable-xxhdpi/ic_default_app_launcher.png
diff --git a/system/AppUsageStatistics/Application/src/main/res/drawable-xxhdpi/ic_launcher.png b/system/AppUsageStatistics/Application/src/main/res/drawable-xxhdpi/ic_launcher.png
new file mode 100755
index 00000000..7f162009
--- /dev/null
+++ b/system/AppUsageStatistics/Application/src/main/res/drawable-xxhdpi/ic_launcher.png
diff --git a/system/AppUsageStatistics/Application/src/main/res/layout/activity_app_usage_statistics.xml b/system/AppUsageStatistics/Application/src/main/res/layout/activity_app_usage_statistics.xml
new file mode 100644
index 00000000..2627c8b7
--- /dev/null
+++ b/system/AppUsageStatistics/Application/src/main/res/layout/activity_app_usage_statistics.xml
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+ Copyright 2014 The Android Open Source Project
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+             xmlns:tools="http://schemas.android.com/tools"
+             android:id="@+id/container"
+             android:layout_width="match_parent"
+             android:layout_height="match_parent"
+             tools:context="com.example.android.appusagestatistics.AppUsageStatisticsActivity"
+             tools:ignore="MergeRootFrame" />
diff --git a/system/AppUsageStatistics/Application/src/main/res/layout/fragment_app_usage_statistics.xml b/system/AppUsageStatistics/Application/src/main/res/layout/fragment_app_usage_statistics.xml
new file mode 100644
index 00000000..1d567b76
--- /dev/null
+++ b/system/AppUsageStatistics/Application/src/main/res/layout/fragment_app_usage_statistics.xml
@@ -0,0 +1,55 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+ Copyright 2014 The Android Open Source Project
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+              android:gravity="center_vertical"
+              android:layout_width="match_parent"
+              android:layout_height="match_parent"
+              android:orientation="vertical"
+              android:padding="@dimen/margin_medium">
+
+    <Button android:id="@+id/button_open_usage_setting"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/open_app_usage_setting"
+            android:visibility="gone"
+            />
+
+    <LinearLayout android:layout_width="wrap_content"
+                  android:layout_height="wrap_content"
+                  android:orientation="horizontal"
+            >
+        <TextView android:layout_width="wrap_content"
+                  android:layout_height="wrap_content"
+                  android:text="@string/time_span"
+                />
+
+        <Spinner android:id="@+id/spinner_time_span"
+                 android:layout_width="wrap_content"
+                 android:layout_height="wrap_content"/>
+    </LinearLayout>
+
+    <android.support.v7.widget.RecyclerView
+            android:id="@+id/recyclerview_app_usage"
+            android:layout_marginLeft="@dimen/margin_small"
+            android:layout_marginRight="@dimen/margin_small"
+            android:scrollbars="vertical"
+            android:drawSelectorOnTop="true"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"/>
+
+</LinearLayout>
diff --git a/system/AppUsageStatistics/Application/src/main/res/layout/usage_row.xml b/system/AppUsageStatistics/Application/src/main/res/layout/usage_row.xml
new file mode 100644
index 00000000..c16f039e
--- /dev/null
+++ b/system/AppUsageStatistics/Application/src/main/res/layout/usage_row.xml
@@ -0,0 +1,72 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+ Copyright 2014 The Android Open Source Project
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+                android:layout_width="match_parent"
+                android:layout_height="@dimen/usage_row_height"
+        >
+
+    <LinearLayout android:layout_width="wrap_content"
+                  android:layout_height="wrap_content"
+                  android:orientation="horizontal"
+                  android:layout_centerVertical="true"
+                  android:gravity="center_vertical"
+            >
+        <ImageView android:id="@+id/app_icon"
+                   android:layout_width="wrap_content"
+                   android:layout_height="wrap_content"
+                />
+        <LinearLayout android:layout_width="wrap_content"
+                      android:layout_height="wrap_content"
+                      android:layout_marginLeft="@dimen/margin_medium"
+                      android:orientation="vertical"
+                >
+
+            <TextView
+                    android:id="@+id/textview_package_name"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    style="@style/PackageNameFont"
+                    />
+
+            <LinearLayout android:layout_width="wrap_content"
+                          android:layout_height="wrap_content"
+                          android:orientation="horizontal"
+                    >
+
+                <TextView
+                        android:id="@+id/textview_last_time_used_label"
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="@string/last_time_used"
+                        />
+
+                <TextView
+                        android:id="@+id/textview_last_time_used"
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        />
+            </LinearLayout>
+        </LinearLayout>
+    </LinearLayout>
+
+    <View android:id="@+id/divider"
+          android:layout_width="match_parent"
+          android:layout_height="1dp"
+          android:background="#bbbbbb"/>
+
+</RelativeLayout>
\ No newline at end of file
diff --git a/system/AppUsageStatistics/Application/src/main/res/values/dimens.xml b/system/AppUsageStatistics/Application/src/main/res/values/dimens.xml
new file mode 100644
index 00000000..d1741c33
--- /dev/null
+++ b/system/AppUsageStatistics/Application/src/main/res/values/dimens.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+ Copyright 2014 The Android Open Source Project
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+
+<resources>
+    <dimen name="usage_row_height">72dp</dimen>
+</resources>
\ No newline at end of file
diff --git a/system/AppUsageStatistics/Application/src/main/res/values/navigation_items.xml b/system/AppUsageStatistics/Application/src/main/res/values/navigation_items.xml
new file mode 100644
index 00000000..b36a4a58
--- /dev/null
+++ b/system/AppUsageStatistics/Application/src/main/res/values/navigation_items.xml
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ Copyright 2014 The Android Open Source Project
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+<resources>
+    <string-array name="action_list">
+        <item>Daily</item>
+        <item>Weekly</item>
+        <item>Monthly</item>
+        <item>Yearly</item>
+    </string-array>
+</resources>
\ No newline at end of file
diff --git a/system/AppUsageStatistics/Application/src/main/res/values/strings.xml b/system/AppUsageStatistics/Application/src/main/res/values/strings.xml
new file mode 100644
index 00000000..2caaf900
--- /dev/null
+++ b/system/AppUsageStatistics/Application/src/main/res/values/strings.xml
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ Copyright 2014 The Android Open Source Project
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+<resources>
+    <string name="open_app_usage_setting">Open Apps with usage access settings</string>
+    <string name="last_time_used">"Last time used: "</string>
+    <string name="time_span">"Time span: "</string>
+    <string name="explanation_access_to_appusage_is_not_enabled">Failed to retrieve app usage
+        statistics. You may need to enable access "
+        + "for this app through Settings > Security > Apps with usage access
+    </string>
+</resources>
diff --git a/system/AppUsageStatistics/Application/src/main/res/values/styles.xml b/system/AppUsageStatistics/Application/src/main/res/values/styles.xml
new file mode 100644
index 00000000..d4002764
--- /dev/null
+++ b/system/AppUsageStatistics/Application/src/main/res/values/styles.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+ Copyright 2014 The Android Open Source Project
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+<resources>
+    <style name="PackageNameFont" parent="@android:style/TextAppearance.Small">
+        <item name="android:textColor">#000000</item>
+    </style>
+</resources>
\ No newline at end of file
diff --git a/system/AppUsageStatistics/Application/tests/src/com/example/android/appusagestatistics/AppUsageStatisticsActivityTests.java b/system/AppUsageStatistics/Application/tests/src/com/example/android/appusagestatistics/AppUsageStatisticsActivityTests.java
new file mode 100644
index 00000000..f2e3ea91
--- /dev/null
+++ b/system/AppUsageStatistics/Application/tests/src/com/example/android/appusagestatistics/AppUsageStatisticsActivityTests.java
@@ -0,0 +1,70 @@
+/*
+* Copyright 2014 The Android Open Source Project
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+/*
+* Copyright (C) 2014 The Android Open Source Project
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*      http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+package com.example.android.appusagestatistics;
+
+import android.test.ActivityInstrumentationTestCase2;
+
+/**
+ * Tests for {@link AppUsageStatisticsActivity}.
+ */
+public class AppUsageStatisticsActivityTests
+        extends ActivityInstrumentationTestCase2<AppUsageStatisticsActivity> {
+
+    private AppUsageStatisticsActivity mTestActivity;
+    private AppUsageStatisticsFragment mTestFragment;
+
+    public AppUsageStatisticsActivityTests() {
+        super(AppUsageStatisticsActivity.class);
+    }
+
+    @Override
+    protected void setUp() throws Exception {
+        super.setUp();
+
+        // Starts the activity under test using the default Intent with:
+        // action = {@link Intent#ACTION_MAIN}
+        // flags = {@link Intent#FLAG_ACTIVITY_NEW_TASK}
+        // All other fields are null or empty.
+        mTestActivity = getActivity();
+        mTestFragment = (AppUsageStatisticsFragment)
+                mTestActivity.getSupportFragmentManager().getFragments().get(0);
+    }
+
+    /**
+     * Test if the test fixture has been set up correctly.
+     */
+    public void testPreconditions() {
+        //Try to add a message to add context to your assertions. These messages will be shown if
+        //a tests fails and make it easy to understand why a test failed
+        assertNotNull("mTestActivity is null", mTestActivity);
+        assertNotNull("mTestFragment is null", mTestFragment);
+    }
+}
diff --git a/system/AppUsageStatistics/Application/tests/src/com/example/android/appusagestatistics/AppUsageStatisticsFragmentTests.java b/system/AppUsageStatistics/Application/tests/src/com/example/android/appusagestatistics/AppUsageStatisticsFragmentTests.java
new file mode 100644
index 00000000..d8adb1ce
--- /dev/null
+++ b/system/AppUsageStatistics/Application/tests/src/com/example/android/appusagestatistics/AppUsageStatisticsFragmentTests.java
@@ -0,0 +1,97 @@
+/*
+* Copyright 2014 The Android Open Source Project
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+package com.example.android.appusagestatistics;
+
+import com.example.android.appusagestatistics.AppUsageStatisticsFragment.StatsUsageInterval;
+
+import android.app.usage.UsageStats;
+import android.app.usage.UsageStatsManager;
+import android.test.ActivityInstrumentationTestCase2;
+
+import java.util.List;
+
+/**
+ * Tests for {@link com.example.android.appusagestatistics.AppUsageStatisticsFragment}.
+ */
+public class AppUsageStatisticsFragmentTests
+        extends ActivityInstrumentationTestCase2<AppUsageStatisticsActivity> {
+
+    private AppUsageStatisticsActivity mTestActivity;
+    private AppUsageStatisticsFragment mTestFragment;
+
+    public AppUsageStatisticsFragmentTests() {
+        super(AppUsageStatisticsActivity.class);
+    }
+
+    @Override
+    protected void setUp() throws Exception {
+        super.setUp();
+
+        // Starts the activity under test using the default Intent with:
+        // action = {@link Intent#ACTION_MAIN}
+        // flags = {@link Intent#FLAG_ACTIVITY_NEW_TASK}
+        // All other fields are null or empty.
+        mTestActivity = getActivity();
+        mTestFragment = (AppUsageStatisticsFragment)
+                mTestActivity.getSupportFragmentManager().getFragments().get(0);
+    }
+
+    /**
+     * Test if the test fixture has been set up correctly.
+     */
+    public void testPreconditions() {
+        assertNotNull(mTestFragment.mUsageStatsManager);
+        assertNotNull(mTestFragment.mUsageListAdapter);
+        assertNotNull(mTestFragment.mRecyclerView);
+        assertNotNull(mTestFragment.mLayoutManager);
+        assertNotNull(mTestFragment.mOpenUsageSettingButton);
+        assertNotNull(mTestFragment.mSpinner);
+    }
+
+    public void testStatsUsageInterval_getValue() {
+        assertTrue(StatsUsageInterval.DAILY == StatsUsageInterval.getValue("Daily"));
+        assertTrue(StatsUsageInterval.WEEKLY == StatsUsageInterval.getValue("Weekly"));
+        assertTrue(StatsUsageInterval.MONTHLY == StatsUsageInterval.getValue("Monthly"));
+        assertTrue(StatsUsageInterval.YEARLY == StatsUsageInterval.getValue("Yearly"));
+        assertNull(StatsUsageInterval.getValue("NonExistent"));
+    }
+
+    public void testGetUsageStatistics() {
+        List<UsageStats> usageStatsList = mTestFragment
+                .getUsageStatistics(UsageStatsManager.INTERVAL_DAILY);
+
+        // Whether the usageStatsList has any UsageStats depends on if the app is granted
+        // the access to App usage statistics.
+        // Only check non null here.
+        assertNotNull(usageStatsList);
+    }
+
+    public void testUpdateAppsList() {
+        List<UsageStats> usageStatsList = mTestFragment
+                .getUsageStatistics(UsageStatsManager.INTERVAL_DAILY);
+
+        mTestFragment.updateAppsList(usageStatsList);
+        getInstrumentation().waitForIdleSync();
+
+        // The result depends on if the app is granted the access to App usage statistics.
+        if (usageStatsList.size() == 0) {
+            assertTrue(mTestFragment.mUsageListAdapter.getItemCount() == 0);
+        } else {
+            assertTrue(mTestFragment.mUsageListAdapter.getItemCount() > 0);
+        }
+    }
+}
diff --git a/system/AppUsageStatistics/build.gradle b/system/AppUsageStatistics/build.gradle
new file mode 100644
index 00000000..2b8d1ef1
--- /dev/null
+++ b/system/AppUsageStatistics/build.gradle
@@ -0,0 +1,11 @@
+
+// BEGIN_EXCLUDE
+import com.example.android.samples.build.SampleGenPlugin
+apply plugin: SampleGenPlugin
+
+samplegen {
+  pathToBuild "../../../../build"
+  pathToSamplesCommon "../../common"
+}
+apply from: "../../../../build/build.gradle"
+// END_EXCLUDE
diff --git a/system/AppUsageStatistics/buildSrc/build.gradle b/system/AppUsageStatistics/buildSrc/build.gradle
new file mode 100644
index 00000000..8c294c23
--- /dev/null
+++ b/system/AppUsageStatistics/buildSrc/build.gradle
@@ -0,0 +1,15 @@
+repositories {
+    mavenCentral()
+}
+dependencies {
+    compile 'org.freemarker:freemarker:2.3.20'
+}
+
+sourceSets {
+    main {
+        groovy {
+            srcDir new File(rootDir, "../../../../../build/buildSrc/src/main/groovy")
+        }
+    }
+}
+
diff --git a/system/AppUsageStatistics/gradle/wrapper/gradle-wrapper.jar b/system/AppUsageStatistics/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 00000000..8c0fb64a
--- /dev/null
+++ b/system/AppUsageStatistics/gradle/wrapper/gradle-wrapper.jar
diff --git a/system/AppUsageStatistics/gradle/wrapper/gradle-wrapper.properties b/system/AppUsageStatistics/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 00000000..8a27ebfa
--- /dev/null
+++ b/system/AppUsageStatistics/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,6 @@
+#Sun Dec 07 22:52:45 JST 2014
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-2.2.1-all.zip
diff --git a/system/AppUsageStatistics/gradlew b/system/AppUsageStatistics/gradlew
new file mode 100755
index 00000000..91a7e269
--- /dev/null
+++ b/system/AppUsageStatistics/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/system/AppUsageStatistics/gradlew.bat b/system/AppUsageStatistics/gradlew.bat
new file mode 100644
index 00000000..aec99730
--- /dev/null
+++ b/system/AppUsageStatistics/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/system/AppUsageStatistics/screenshots/screenshot-1.png b/system/AppUsageStatistics/screenshots/screenshot-1.png
new file mode 100644
index 00000000..ab0da864
--- /dev/null
+++ b/system/AppUsageStatistics/screenshots/screenshot-1.png
diff --git a/system/AppUsageStatistics/screenshots/screenshot-2.png b/system/AppUsageStatistics/screenshots/screenshot-2.png
new file mode 100644
index 00000000..7663ebdf
--- /dev/null
+++ b/system/AppUsageStatistics/screenshots/screenshot-2.png
diff --git a/system/AppUsageStatistics/screenshots/web-icon.png b/system/AppUsageStatistics/screenshots/web-icon.png
new file mode 100755
index 00000000..68af9d0e
--- /dev/null
+++ b/system/AppUsageStatistics/screenshots/web-icon.png
diff --git a/system/AppUsageStatistics/settings.gradle b/system/AppUsageStatistics/settings.gradle
new file mode 100644
index 00000000..9464a359
--- /dev/null
+++ b/system/AppUsageStatistics/settings.gradle
@@ -0,0 +1 @@
+include 'Application'
diff --git a/system/AppUsageStatistics/template-params.xml b/system/AppUsageStatistics/template-params.xml
new file mode 100644
index 00000000..38f5781d
--- /dev/null
+++ b/system/AppUsageStatistics/template-params.xml
@@ -0,0 +1,104 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ Copyright 2014 The Android Open Source Project
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+<sample>
+    <name>AppUsageStatistics</name>
+    <group>System</group>
+    <package>com.example.android.appusagestatistics</package>
+
+    <minSdk>21</minSdk>
+
+    <dependency>com.android.support:recyclerview-v7:+</dependency>
+    <dependency>com.android.support:appcompat-v7:21.+</dependency>
+
+    <strings>
+        <intro>
+            <![CDATA[
+            This sample explains how to use App usage statistics API, which was introduced
+            in Android 5.0.
+            ]]>
+        </intro>
+    </strings>
+
+    <template src="base" />
+
+    <metadata>
+        <status>DRAFT</status>
+        <categories>System</categories>
+        <technologies>Android</technologies>
+        <languages>Java</languages>
+        <solutions>Mobile</solutions>
+        <level>INTERMEDIATE</level>
+        <icon>screenshots/web-icon.png</icon>
+        <screenshots>
+            <img>screenshots/screenshot-1.png</img>
+            <img>screenshots/screenshot-2.png</img>
+        </screenshots>
+        <api_refs>
+            <android>android.app.usage.UsageStats</android>
+            <android>android.app.usage.UsageStatsManager</android>
+        </api_refs>
+
+        <description>
+<![CDATA[
+A basic app showing how to use App usage statistics API to let users collect statistics related
+to usage of the applications.
+]]>
+        </description>
+
+        <intro>
+<![CDATA[
+The [App usage statistics][1] API allows app developers to collect statistics related to usage of
+the applications. This API provides more detailed usage information than the deprecated
+[getRecentTasks()][2] method.
+
+This example illustrates how to use the App usage statistics API by showing the applications sorted
+by the timestamp of the last time each app was used.
+
+To use this API, you must first declare the `android.permission.PACKAGE_USAGE_STATS` permission
+in your manifest. The user must also enable access for this app through
+`Settings > Security > Apps with usage access`.
+
+To collect the statistics of the app usage, you need to first get the instance of
+[UsageStatsManager][3] by the following code:
+
+```java
+mUsageStatsManager = (UsageStatsManager) getActivity()
+       .getSystemService(Context.USAGE_STATS_SERVICE);
+```
+
+Then you can retrieve the statistics of the app usage by the following method:
+
+```java
+Calendar cal = Calendar.getInstance();
+cal.add(Calendar.YEAR, -1);
+List<UsageStats> queryUsageStats = mUsageStatsManager
+        .queryUsageStats(UsageStatsManager.INTERVAL_DAILY, cal.getTimeInMillis(),
+                System.currentTimeMillis());
+```
+
+The first argument of the [queryUsageStats()][4] is used for the time interval by which the
+stats are aggregated. The second and the third arguments are used for specifying the beginning
+and the end of the range of the stats to include in the results.
+
+[1]: https://developer.android.com/reference/android/app/usage/package-summary.html
+[2]: https://developer.android.com/reference/android/app/ActivityManager.html#getRecentTasks(int%2C%20int)
+[3]: https://developer.android.com/reference/android/app/usage/UsageStatsManager.html
+[4]: https://developer.android.com/reference/android/app/usage/UsageStatsManager.html#queryUsageStats(int%2C%20long%2C%20long)
+]]>
+        </intro>
+    </metadata>
+</sample>