EffectiveNavigation: Revive an old sample am: 559783ec49 am: cd20fac4b6 am: 412540d443

am: 71bf6ed9e3

Change-Id: I2c173a1b7d07bc549d68272d5694b05c6bfdaa14

29 files changed, 1149 insertions, 0 deletions

diff --git a/ui/views/EffectiveNavigation/app/build.gradle b/ui/views/EffectiveNavigation/app/build.gradle
new file mode 100644
index 00000000..641e9989
--- /dev/null
+++ b/ui/views/EffectiveNavigation/app/build.gradle
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2017 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.
+ */
+
+apply plugin: 'com.android.application'
+
+ext {
+    supportLibraryVersion = '25.1.0'
+}
+
+android {
+    compileSdkVersion 25
+    buildToolsVersion '25.0.2'
+
+    defaultConfig {
+        applicationId 'com.example.android.effectivenavigation'
+        minSdkVersion 9
+        targetSdkVersion 25
+        versionCode 2
+        versionName '2.0'
+        testInstrumentationRunner 'android.support.test.runner.AndroidJUnitRunner'
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
+        }
+    }
+
+    configurations.all {
+        resolutionStrategy.force "com.android.support:support-annotations:$supportLibraryVersion"
+    }
+}
+
+dependencies {
+    compile "com.android.support:design:$supportLibraryVersion"
+    androidTestCompile 'junit:junit:4.12'
+    androidTestCompile 'com.android.support.test:runner:0.5'
+    androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2.2'
+}
diff --git a/ui/views/EffectiveNavigation/app/src/androidTest/java/com/example/android/effectivenavigation/CollectionDemoActivityTest.java b/ui/views/EffectiveNavigation/app/src/androidTest/java/com/example/android/effectivenavigation/CollectionDemoActivityTest.java
new file mode 100644
index 00000000..a0a1620a
--- /dev/null
+++ b/ui/views/EffectiveNavigation/app/src/androidTest/java/com/example/android/effectivenavigation/CollectionDemoActivityTest.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2017 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.effectivenavigation;
+
+import static android.support.test.espresso.Espresso.onView;
+import static android.support.test.espresso.action.ViewActions.click;
+import static android.support.test.espresso.action.ViewActions.swipeLeft;
+import static android.support.test.espresso.assertion.ViewAssertions.matches;
+import static android.support.test.espresso.matcher.ViewMatchers.isDisplayed;
+import static android.support.test.espresso.matcher.ViewMatchers.isSelected;
+import static android.support.test.espresso.matcher.ViewMatchers.withId;
+import static android.support.test.espresso.matcher.ViewMatchers.withText;
+
+import static org.hamcrest.Matchers.not;
+
+import android.support.test.rule.ActivityTestRule;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+public class CollectionDemoActivityTest {
+
+    @Rule
+    public final ActivityTestRule<CollectionDemoActivity> rule =
+            new ActivityTestRule<>(CollectionDemoActivity.class);
+
+    @Test
+    public void clickTabToChangeSection() {
+        onView(withText("2")).check(matches(not(isDisplayed())));
+        onView(withText("Page 2")).perform(click()).check(matches(isSelected()));
+        onView(withText("2")).check(matches(isDisplayed()));
+    }
+
+    @Test
+    public void swipeToChangeSection() {
+        onView(withText("1")).check(matches(isDisplayed()));
+        onView(withId(R.id.pager)).perform(swipeLeft());
+        onView(withText("2")).check(matches(isDisplayed()));
+        onView(withText("Page 2")).check(matches(isSelected()));
+    }
+
+}
diff --git a/ui/views/EffectiveNavigation/app/src/androidTest/java/com/example/android/effectivenavigation/MainActivityTest.java b/ui/views/EffectiveNavigation/app/src/androidTest/java/com/example/android/effectivenavigation/MainActivityTest.java
new file mode 100644
index 00000000..b6f442c5
--- /dev/null
+++ b/ui/views/EffectiveNavigation/app/src/androidTest/java/com/example/android/effectivenavigation/MainActivityTest.java
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2017 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.effectivenavigation;
+
+import static android.support.test.espresso.Espresso.onView;
+import static android.support.test.espresso.action.ViewActions.click;
+import static android.support.test.espresso.action.ViewActions.swipeLeft;
+import static android.support.test.espresso.assertion.ViewAssertions.matches;
+import static android.support.test.espresso.matcher.ViewMatchers.isDisplayed;
+import static android.support.test.espresso.matcher.ViewMatchers.isSelected;
+import static android.support.test.espresso.matcher.ViewMatchers.withContentDescription;
+import static android.support.test.espresso.matcher.ViewMatchers.withId;
+import static android.support.test.espresso.matcher.ViewMatchers.withText;
+
+import static org.hamcrest.Matchers.not;
+
+import android.support.test.rule.ActivityTestRule;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+public class MainActivityTest {
+
+    @Rule
+    public final ActivityTestRule<MainActivity> rule = new ActivityTestRule<>(MainActivity.class);
+
+    @Test
+    public void checkPreconditions() {
+        onView(withId(R.id.toolbar)).check(matches(isDisplayed()));
+        onView(withId(R.id.pager)).check(matches(isDisplayed()));
+        onView(withId(R.id.tabs)).check(matches(isDisplayed()));
+        onView(withId(R.id.demo_collection_button)).check(matches(isDisplayed()));
+        onView(withId(R.id.demo_external_activity)).check(matches(isDisplayed()));
+    }
+
+    @Test
+    public void clickTabToChangeSection() {
+        onView(withText("Section 2 is just a dummy section.")).check(matches(not(isDisplayed())));
+        onView(withText("Section 2")).perform(click()).check(matches(isSelected()));
+        onView(withText("Section 2 is just a dummy section.")).check(matches(isDisplayed()));
+    }
+
+    @Test
+    public void swipeToChangeSection() {
+        onView(withText("Section 2 is just a dummy section.")).check(matches(not(isDisplayed())));
+        onView(withId(R.id.pager)).perform(swipeLeft());
+        onView(withText("Section 2 is just a dummy section.")).check(matches(isDisplayed()));
+        onView(withText("Section 2")).check(matches(isSelected()));
+    }
+
+    @Test
+    public void openAndCloseCollection() {
+        onView(withId(R.id.demo_collection_button)).perform(click());
+        // We should be in CollectionDemoActivity now
+        onView(withText("Demo Collection")).check(matches(isDisplayed()));
+        onView(withContentDescription("Navigate up")).perform(click());
+        // We should be back in MainActivity now
+        onView(withText("Effective Navigation")).check(matches(isDisplayed()));
+    }
+
+}
diff --git a/ui/views/EffectiveNavigation/app/src/main/AndroidManifest.xml b/ui/views/EffectiveNavigation/app/src/main/AndroidManifest.xml
new file mode 100644
index 00000000..5b8c9b24
--- /dev/null
+++ b/ui/views/EffectiveNavigation/app/src/main/AndroidManifest.xml
@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright 2017 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"
+          xmlns:tools="http://schemas.android.com/tools"
+          package="com.example.android.effectivenavigation">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:theme="@style/Theme.EffectiveNavigation"
+        tools:ignore="AllowBackup,GoogleAppIndexingWarning">
+
+        <activity
+            android:name=".MainActivity"
+            android:label="@string/app_name">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+
+        <activity
+            android:name=".CollectionDemoActivity"
+            android:label="@string/demo_collection"
+            android:parentActivityName=".MainActivity"
+            tools:ignore="UnusedAttribute">
+            <meta-data
+                android:name="android.support.PARENT_ACTIVITY"
+                android:value=".MainActivity"/>
+        </activity>
+
+    </application>
+
+</manifest>
diff --git a/ui/views/EffectiveNavigation/app/src/main/java/com/example/android/effectivenavigation/CollectionDemoActivity.java b/ui/views/EffectiveNavigation/app/src/main/java/com/example/android/effectivenavigation/CollectionDemoActivity.java
new file mode 100644
index 00000000..3f5ebdc1
--- /dev/null
+++ b/ui/views/EffectiveNavigation/app/src/main/java/com/example/android/effectivenavigation/CollectionDemoActivity.java
@@ -0,0 +1,117 @@
+/*
+ * Copyright 2017 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.effectivenavigation;
+
+import android.os.Bundle;
+import android.support.design.widget.TabLayout;
+import android.support.v4.app.Fragment;
+import android.support.v4.app.FragmentManager;
+import android.support.v4.app.FragmentStatePagerAdapter;
+import android.support.v4.view.ViewPager;
+import android.support.v7.app.ActionBar;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.Toolbar;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+import java.util.Locale;
+
+public class CollectionDemoActivity extends AppCompatActivity {
+
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_collection_demo);
+
+        // Set up the app bar
+        final Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
+        setSupportActionBar(toolbar);
+        ActionBar actionBar = getSupportActionBar();
+        if (actionBar != null) {
+            actionBar.setDisplayHomeAsUpEnabled(true);
+        }
+
+        // Create an adapter that when requested, will return a fragment representing an object in
+        // the collection.
+        //
+        // ViewPager and its adapters use support library fragments, so we must use
+        // getSupportFragmentManager.
+        final DemoCollectionPagerAdapter adapter =
+                new DemoCollectionPagerAdapter(getSupportFragmentManager());
+
+        // Set up the ViewPager, attaching the adapter.
+        final ViewPager viewPager = (ViewPager) findViewById(R.id.pager);
+        viewPager.setAdapter(adapter);
+
+        final TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
+        tabLayout.setupWithViewPager(viewPager);
+    }
+
+    /**
+     * The {@link android.support.v4.view.PagerAdapter} that will provide fragments representing
+     * each object in a collection. We use a
+     * {@link android.support.v4.app.FragmentStatePagerAdapter}
+     * derivative, which will destroy and re-create fragments as needed, saving and restoring their
+     * state in the process. This is important to conserve memory and is a best practice when
+     * allowing navigation between objects in a potentially large collection.
+     */
+    private static class DemoCollectionPagerAdapter extends FragmentStatePagerAdapter {
+
+        DemoCollectionPagerAdapter(FragmentManager fm) {
+            super(fm);
+        }
+
+        @Override
+        public Fragment getItem(int i) {
+            Fragment fragment = new DemoObjectFragment();
+            Bundle args = new Bundle();
+            args.putInt(DemoObjectFragment.ARG_OBJECT, i + 1); // Our object is just an integer :-P
+            fragment.setArguments(args);
+            return fragment;
+        }
+
+        @Override
+        public int getCount() {
+            // For this contrived example, we have a 100-object collection.
+            return 100;
+        }
+
+        @Override
+        public CharSequence getPageTitle(int position) {
+            return "Page " + (position + 1);
+        }
+    }
+
+    /**
+     * A dummy fragment representing a section of the app, but that simply displays dummy text.
+     */
+    public static class DemoObjectFragment extends Fragment {
+
+        public static final String ARG_OBJECT = "object";
+
+        @Override
+        public View onCreateView(LayoutInflater inflater, ViewGroup container,
+                Bundle savedInstanceState) {
+            View rootView = inflater.inflate(R.layout.fragment_collection_object, container, false);
+            Bundle args = getArguments();
+            ((TextView) rootView.findViewById(android.R.id.text1)).setText(
+                    String.format(Locale.US, "%d", args.getInt(ARG_OBJECT)));
+            return rootView;
+        }
+    }
+}
diff --git a/ui/views/EffectiveNavigation/app/src/main/java/com/example/android/effectivenavigation/MainActivity.java b/ui/views/EffectiveNavigation/app/src/main/java/com/example/android/effectivenavigation/MainActivity.java
new file mode 100644
index 00000000..5efc2371
--- /dev/null
+++ b/ui/views/EffectiveNavigation/app/src/main/java/com/example/android/effectivenavigation/MainActivity.java
@@ -0,0 +1,177 @@
+/*
+ * Copyright 2017 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.effectivenavigation;
+
+import android.content.Intent;
+import android.os.Build;
+import android.os.Bundle;
+import android.support.design.widget.TabLayout;
+import android.support.v4.app.Fragment;
+import android.support.v4.app.FragmentManager;
+import android.support.v4.app.FragmentPagerAdapter;
+import android.support.v4.view.ViewPager;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.Toolbar;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+public class MainActivity extends AppCompatActivity {
+
+    /**
+     * An {@link Intent} flag to be used for launching an external activity. This ensures that
+     * relaunching the application from device home screen does not return to the external
+     * activity. We can use {@link Intent#FLAG_ACTIVITY_NEW_DOCUMENT} or
+     * {@link Intent#FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET} depending on the API level.
+     */
+    private static final int INTENT_FLAG_ACTIVITY_NEW_DOCUMENT;
+
+    static {
+        if (Build.VERSION.SDK_INT >= 21) {
+            INTENT_FLAG_ACTIVITY_NEW_DOCUMENT = Intent.FLAG_ACTIVITY_NEW_DOCUMENT;
+        } else {
+            //noinspection deprecation
+            INTENT_FLAG_ACTIVITY_NEW_DOCUMENT = Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET;
+        }
+    }
+
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+
+        // Create the adapter that will return a fragment for each of the three primary sections
+        // of the app.
+        AppSectionsPagerAdapter appSectionsPagerAdapter = new AppSectionsPagerAdapter(
+                getSupportFragmentManager());
+
+        // Set up the app bar.
+        final Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
+        setSupportActionBar(toolbar);
+
+        // Set up the ViewPager, attaching the adapter and setting up a listener for when the
+        // user swipes between sections.
+        final ViewPager viewPager = (ViewPager) findViewById(R.id.pager);
+        viewPager.setAdapter(appSectionsPagerAdapter);
+
+        // Set up the TabLayout, making it sync with the ViewPager.
+        final TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
+        tabLayout.setupWithViewPager(viewPager);
+    }
+
+    /**
+     * A {@link FragmentPagerAdapter} that returns a fragment corresponding to one of the primary
+     * sections of the app.
+     */
+    private static class AppSectionsPagerAdapter extends FragmentPagerAdapter {
+
+        AppSectionsPagerAdapter(FragmentManager fm) {
+            super(fm);
+        }
+
+        @Override
+        public Fragment getItem(int i) {
+            switch (i) {
+                case 0:
+                    // The first section of the app is the most interesting -- it offers
+                    // a launchpad into the other demonstrations in this example application.
+                    return new LaunchpadSectionFragment();
+
+                default:
+                    // The other sections of the app are dummy placeholders.
+                    Fragment fragment = new DummySectionFragment();
+                    Bundle args = new Bundle();
+                    args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, i + 1);
+                    fragment.setArguments(args);
+                    return fragment;
+            }
+        }
+
+        @Override
+        public int getCount() {
+            return 3;
+        }
+
+        @Override
+        public CharSequence getPageTitle(int position) {
+            return "Section " + (position + 1);
+        }
+
+    }
+
+    /**
+     * A fragment that launches other parts of the demo application.
+     */
+    public static class LaunchpadSectionFragment extends Fragment {
+
+        @Override
+        public View onCreateView(LayoutInflater inflater, ViewGroup container,
+                Bundle savedInstanceState) {
+            View rootView = inflater.inflate(R.layout.fragment_section_launchpad, container, false);
+
+            // Demonstration of a collection-browsing activity.
+            rootView.findViewById(R.id.demo_collection_button)
+                    .setOnClickListener(new View.OnClickListener() {
+                        @Override
+                        public void onClick(View view) {
+                            Intent intent = new Intent(getActivity(), CollectionDemoActivity.class);
+                            startActivity(intent);
+                        }
+                    });
+
+            // Demonstration of navigating to external activities.
+            rootView.findViewById(R.id.demo_external_activity)
+                    .setOnClickListener(new View.OnClickListener() {
+                        @Override
+                        public void onClick(View view) {
+                            // Create an intent that asks the user to pick a photo, but using
+                            // FLAG_ACTIVITY_NEW_DOCUMENT, ensures that relaunching
+                            // the application from the device home screen does not return
+                            // to the external activity.
+                            Intent externalActivityIntent = new Intent(Intent.ACTION_PICK);
+                            externalActivityIntent.setType("image/*");
+                            externalActivityIntent.addFlags(
+                                    INTENT_FLAG_ACTIVITY_NEW_DOCUMENT);
+                            startActivity(externalActivityIntent);
+                        }
+                    });
+
+            return rootView;
+        }
+
+    }
+
+    /**
+     * A dummy fragment representing a section of the app, but that simply displays dummy text.
+     */
+    public static class DummySectionFragment extends Fragment {
+
+        public static final String ARG_SECTION_NUMBER = "section_number";
+
+        @Override
+        public View onCreateView(LayoutInflater inflater, ViewGroup container,
+                Bundle savedInstanceState) {
+            View rootView = inflater.inflate(R.layout.fragment_section_dummy, container, false);
+            Bundle args = getArguments();
+            ((TextView) rootView.findViewById(android.R.id.text1)).setText(
+                    getString(R.string.dummy_section_text, args.getInt(ARG_SECTION_NUMBER)));
+            return rootView;
+        }
+
+    }
+
+}
diff --git a/ui/views/EffectiveNavigation/app/src/main/res/layout/activity_collection_demo.xml b/ui/views/EffectiveNavigation/app/src/main/res/layout/activity_collection_demo.xml
new file mode 100644
index 00000000..f84161ec
--- /dev/null
+++ b/ui/views/EffectiveNavigation/app/src/main/res/layout/activity_collection_demo.xml
@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright 2017 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.
+-->
+<android.support.design.widget.CoordinatorLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/coordinator"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <android.support.design.widget.AppBarLayout
+        android:id="@+id/appbar"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="?attr/colorPrimary"
+        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
+
+        <android.support.v7.widget.Toolbar
+            android:id="@+id/toolbar"
+            android:layout_width="match_parent"
+            android:layout_height="?attr/actionBarSize"
+            app:layout_collapseMode="pin"
+            app:popupTheme="@style/ThemeOverlay.AppCompat.Light"/>
+
+        <android.support.design.widget.TabLayout
+            android:id="@+id/tabs"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            app:tabMode="scrollable"/>
+
+    </android.support.design.widget.AppBarLayout>
+
+    <android.support.v4.view.ViewPager
+        android:id="@+id/pager"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
+
+</android.support.design.widget.CoordinatorLayout>
diff --git a/ui/views/EffectiveNavigation/app/src/main/res/layout/activity_main.xml b/ui/views/EffectiveNavigation/app/src/main/res/layout/activity_main.xml
new file mode 100644
index 00000000..6b3cefc5
--- /dev/null
+++ b/ui/views/EffectiveNavigation/app/src/main/res/layout/activity_main.xml
@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright 2017 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.
+-->
+<android.support.design.widget.CoordinatorLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/coordinator"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <android.support.design.widget.AppBarLayout
+        android:id="@+id/appbar"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="?attr/colorPrimary"
+        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
+
+        <android.support.v7.widget.Toolbar
+            android:id="@+id/toolbar"
+            android:layout_width="match_parent"
+            android:layout_height="?attr/actionBarSize"
+            app:layout_collapseMode="pin"
+            app:popupTheme="@style/ThemeOverlay.AppCompat.Light"/>
+
+        <android.support.design.widget.TabLayout
+            android:id="@+id/tabs"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"/>
+
+    </android.support.design.widget.AppBarLayout>
+
+    <android.support.v4.view.ViewPager
+        android:id="@+id/pager"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
+
+</android.support.design.widget.CoordinatorLayout>
diff --git a/ui/views/EffectiveNavigation/app/src/main/res/layout/fragment_collection_object.xml b/ui/views/EffectiveNavigation/app/src/main/res/layout/fragment_collection_object.xml
new file mode 100644
index 00000000..25946919
--- /dev/null
+++ b/ui/views/EffectiveNavigation/app/src/main/res/layout/fragment_collection_object.xml
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright 2017 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.
+-->
+<TextView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@android:id/text1"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:gravity="center"
+    android:textSize="128sp"
+    android:padding="32dp" />
diff --git a/ui/views/EffectiveNavigation/app/src/main/res/layout/fragment_section_dummy.xml b/ui/views/EffectiveNavigation/app/src/main/res/layout/fragment_section_dummy.xml
new file mode 100644
index 00000000..0fa29dab
--- /dev/null
+++ b/ui/views/EffectiveNavigation/app/src/main/res/layout/fragment_section_dummy.xml
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright 2017 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.
+-->
+<TextView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@android:id/text1"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:gravity="center"
+    android:textSize="24sp"
+    android:padding="32dp" />
diff --git a/ui/views/EffectiveNavigation/app/src/main/res/layout/fragment_section_launchpad.xml b/ui/views/EffectiveNavigation/app/src/main/res/layout/fragment_section_launchpad.xml
new file mode 100644
index 00000000..b1fba9d0
--- /dev/null
+++ b/ui/views/EffectiveNavigation/app/src/main/res/layout/fragment_section_launchpad.xml
@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright 2017 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:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:gravity="center"
+    android:orientation="vertical">
+
+    <Button
+        android:id="@+id/demo_collection_button"
+        android:layout_width="300dp"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="16dp"
+        android:text="@string/demo_collection"/>
+
+    <Button
+        android:id="@+id/demo_external_activity"
+        android:layout_width="300dp"
+        android:layout_height="wrap_content"
+        android:text="@string/demo_external_activity"/>
+
+</LinearLayout>
diff --git a/ui/views/EffectiveNavigation/app/src/main/res/mipmap-hdpi/ic_launcher.png b/ui/views/EffectiveNavigation/app/src/main/res/mipmap-hdpi/ic_launcher.png
new file mode 100644
index 00000000..70577563
--- /dev/null
+++ b/ui/views/EffectiveNavigation/app/src/main/res/mipmap-hdpi/ic_launcher.png
diff --git a/ui/views/EffectiveNavigation/app/src/main/res/mipmap-mdpi/ic_launcher.png b/ui/views/EffectiveNavigation/app/src/main/res/mipmap-mdpi/ic_launcher.png
new file mode 100644
index 00000000..108a8688
--- /dev/null
+++ b/ui/views/EffectiveNavigation/app/src/main/res/mipmap-mdpi/ic_launcher.png
diff --git a/ui/views/EffectiveNavigation/app/src/main/res/mipmap-xhdpi/ic_launcher.png b/ui/views/EffectiveNavigation/app/src/main/res/mipmap-xhdpi/ic_launcher.png
new file mode 100644
index 00000000..e02ddf36
--- /dev/null
+++ b/ui/views/EffectiveNavigation/app/src/main/res/mipmap-xhdpi/ic_launcher.png
diff --git a/ui/views/EffectiveNavigation/app/src/main/res/mipmap-xxhdpi/ic_launcher.png b/ui/views/EffectiveNavigation/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
new file mode 100644
index 00000000..b1c1f0b5
--- /dev/null
+++ b/ui/views/EffectiveNavigation/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
diff --git a/ui/views/EffectiveNavigation/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png b/ui/views/EffectiveNavigation/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
new file mode 100644
index 00000000..3563d335
--- /dev/null
+++ b/ui/views/EffectiveNavigation/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
diff --git a/ui/views/EffectiveNavigation/app/src/main/res/values/colors.xml b/ui/views/EffectiveNavigation/app/src/main/res/values/colors.xml
new file mode 100644
index 00000000..c9b72ff2
--- /dev/null
+++ b/ui/views/EffectiveNavigation/app/src/main/res/values/colors.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright 2017 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>
+    <color name="primary">#4CAF50</color>
+    <color name="primary_dark">#388E3C</color>
+    <color name="accent">#E040FB</color>
+</resources>
diff --git a/ui/views/EffectiveNavigation/app/src/main/res/values/strings.xml b/ui/views/EffectiveNavigation/app/src/main/res/values/strings.xml
new file mode 100644
index 00000000..201deb76
--- /dev/null
+++ b/ui/views/EffectiveNavigation/app/src/main/res/values/strings.xml
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright 2017 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="app_name">Effective Navigation</string>
+
+    <string name="dummy_section_text">Section %1d is just a dummy section.</string>
+
+    <string name="demo_external_activity">Demo External Activity</string>
+    <string name="demo_collection">Demo Collection</string>
+</resources>
diff --git a/ui/views/EffectiveNavigation/app/src/main/res/values/styles.xml b/ui/views/EffectiveNavigation/app/src/main/res/values/styles.xml
new file mode 100644
index 00000000..42dcf178
--- /dev/null
+++ b/ui/views/EffectiveNavigation/app/src/main/res/values/styles.xml
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright 2017 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="Theme.EffectiveNavigation" parent="Theme.AppCompat.Light.NoActionBar">
+        <item name="colorPrimary">@color/primary</item>
+        <item name="colorPrimaryDark">@color/primary_dark</item>
+        <item name="colorAccent">@color/accent</item>
+    </style>
+
+</resources>
diff --git a/ui/views/EffectiveNavigation/build.gradle b/ui/views/EffectiveNavigation/build.gradle
new file mode 100644
index 00000000..2e369803
--- /dev/null
+++ b/ui/views/EffectiveNavigation/build.gradle
@@ -0,0 +1,15 @@
+// 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:2.2.3'
+    }
+}
+
+allprojects {
+    repositories {
+        jcenter()
+    }
+}
diff --git a/ui/views/EffectiveNavigation/gradle/wrapper/gradle-wrapper.jar b/ui/views/EffectiveNavigation/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 00000000..13372aef
--- /dev/null
+++ b/ui/views/EffectiveNavigation/gradle/wrapper/gradle-wrapper.jar
diff --git a/ui/views/EffectiveNavigation/gradle/wrapper/gradle-wrapper.properties b/ui/views/EffectiveNavigation/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 00000000..04e285f3
--- /dev/null
+++ b/ui/views/EffectiveNavigation/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,6 @@
+#Mon Dec 28 10:00:20 PST 2015
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-2.14.1-all.zip
diff --git a/ui/views/EffectiveNavigation/gradlew b/ui/views/EffectiveNavigation/gradlew
new file mode 100755
index 00000000..9d82f789
--- /dev/null
+++ b/ui/views/EffectiveNavigation/gradlew
@@ -0,0 +1,160 @@
+#!/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
+
+# 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\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+CLASSPATH=$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 "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # 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/ui/views/EffectiveNavigation/gradlew.bat b/ui/views/EffectiveNavigation/gradlew.bat
new file mode 100644
index 00000000..aec99730
--- /dev/null
+++ b/ui/views/EffectiveNavigation/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/ui/views/EffectiveNavigation/screenshots/1-main.png b/ui/views/EffectiveNavigation/screenshots/1-main.png
new file mode 100644
index 00000000..94647bdd
--- /dev/null
+++ b/ui/views/EffectiveNavigation/screenshots/1-main.png
diff --git a/ui/views/EffectiveNavigation/screenshots/2-collection.png b/ui/views/EffectiveNavigation/screenshots/2-collection.png
new file mode 100644
index 00000000..61c93e4c
--- /dev/null
+++ b/ui/views/EffectiveNavigation/screenshots/2-collection.png
diff --git a/ui/views/EffectiveNavigation/screenshots/icon-web.png b/ui/views/EffectiveNavigation/screenshots/icon-web.png
new file mode 100644
index 00000000..bfc21f08
--- /dev/null
+++ b/ui/views/EffectiveNavigation/screenshots/icon-web.png
diff --git a/ui/views/EffectiveNavigation/settings.gradle b/ui/views/EffectiveNavigation/settings.gradle
new file mode 100644
index 00000000..e7b4def4
--- /dev/null
+++ b/ui/views/EffectiveNavigation/settings.gradle
@@ -0,0 +1 @@
+include ':app'
diff --git a/ui/views/EffectiveNavigation/template-params.xml b/ui/views/EffectiveNavigation/template-params.xml
new file mode 100644
index 00000000..3c87a17f
--- /dev/null
+++ b/ui/views/EffectiveNavigation/template-params.xml
@@ -0,0 +1,88 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ Copyright 2017 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>EffectiveNavigation</name>
+    <group>UI</group>
+    <package>com.example.android.effectivenavigation</package>
+
+    <!-- change minSdk if needed-->
+    <minSdk>9</minSdk>
+
+    <strings>
+        <intro>
+            <![CDATA[
+This sample demonstrates how to create swipe views with tabs. Users can swipe
+between tabs, or click on a tab title to jump to the section. Some tabs are
+scrollable, meaning that users can scroll horizontally through the tab strip and
+select a tab.
+]]>
+        </intro>
+        <sample_action>Effective Navigation</sample_action>
+    </strings>
+
+    <metadata>
+        <status>PUBLISHED</status>
+        <categories>UI</categories>
+        <technologies>Android</technologies>
+        <languages>Java</languages>
+        <solutions>Mobile</solutions>
+        <level>BEGINNER</level>
+        <icon>screenshots/icon-web.png</icon>
+        <screenshots>
+            <img>screenshots/1-main.png</img>
+            <img>screenshots/2-collection.png</img>
+        </screenshots>
+        <api_refs>
+            <android>android.support.v4.view.ViewPager</android>
+            <android>android.support.design.widget.TabLayout</android>
+            <android>android.support.v4.app.NavUtils</android>
+        </api_refs>
+        <description>
+            <![CDATA[
+This sample demonstrates how to create swipe views with tabs. Users can swipe
+between tabs, or click on a tab title to jump to the section. Some tabs are
+scrollable, meaning that users can scroll horizontally through the tab strip and
+select a tab.
+]]>
+        </description>
+        <intro>
+            <![CDATA[
+This sample use combination of [ViewPager][1] and [TabLayout][2] to create swipe
+views with tabs.
+
+In order to use ViewPager, you first need to implement a PagerAdapter to feed
+its content. In this sample, we use [FragmentPagerAdapter][3] and
+[FragmentStatePagerAdapter][4]. FragmentPagerAdapter is useful when you have a
+limited number of fixed pages. FragmentStatePagerAdapter can be used for
+ViewPager with a lot of pages as it can save and restore state of Fragments
+inside of it in a memory-efficient way.
+
+Using TabLayout with ViewPager is simple. Just call the method
+[setupWithViewPager(ViewPager)][5], and the TabLayout generates corresponding
+tabs for the ViewPager. The titles are populated from [getPageTitle(int)][6]
+method of your ViewPager adapter.
+
+[1]: https://developer.android.com/reference/android/support/v4/view/ViewPager.html
+[2]: https://developer.android.com/reference/android/support/design/widget/TabLayout.html
+[3]: https://developer.android.com/reference/android/support/v4/app/FragmentPagerAdapter.html
+[4]: https://developer.android.com/reference/android/support/v4/app/FragmentStatePagerAdapter.html
+[5]: https://developer.android.com/reference/android/support/design/widget/TabLayout.html#setupWithViewPager(android.support.v4.view.ViewPager)
+[6]: https://developer.android.com/reference/android/support/v4/view/PagerAdapter.html#getPageTitle(int)
+]]>
+        </intro>
+    </metadata>
+</sample>