Add notification fragment to reference app.

The notification fragment has two pairs of buttons, with one pair at
the top where it will be covered by the heads-up notification (HUN)
and one further down where it won’t be covered by the HUN. Each pair
includes a button to post a notification that will appear as a
heads-up notification and a button to clear the previously posted
notification.

Test: manual
Bug: 155681517
Change-Id: If2ac76cece527d7e45756dbf5659fa86cc98ac2a

6 files changed, 179 insertions, 2 deletions

diff --git a/RotaryPlayground/res/layout/rotary_menu.xml b/RotaryPlayground/res/layout/rotary_menu.xml
index 176d58c..659f119 100644
--- a/RotaryPlayground/res/layout/rotary_menu.xml
+++ b/RotaryPlayground/res/layout/rotary_menu.xml
@@ -39,11 +39,11 @@
         android:layout_weight="1"
         android:text="Grid" />
     <Button
-        android:id="@+id/menu_item_4"
+        android:id="@+id/notification"
         android:layout_width="match_parent"
         android:layout_height="0dp"
         android:layout_weight="1"
-        android:text="Menu Item 4" />
+        android:text="Notification" />
     <Button
         android:id="@+id/scroll"
         android:layout_width="match_parent"
diff --git a/RotaryPlayground/res/layout/rotary_notification.xml b/RotaryPlayground/res/layout/rotary_notification.xml
new file mode 100644
index 0000000..998febe
--- /dev/null
+++ b/RotaryPlayground/res/layout/rotary_notification.xml
@@ -0,0 +1,79 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2020 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="match_parent">
+
+    <com.android.car.ui.FocusArea
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_alignParentTop="true">
+        <TextView
+            android:layout_width="0dp"
+            android:layout_height="@dimen/button_height"
+            android:layout_weight="1"
+            android:gravity="center"
+            android:text="Under HUN"/>
+        <Button
+            android:id="@+id/add_notification_button1"
+            android:layout_width="0dp"
+            android:layout_height="@dimen/button_height"
+            android:layout_weight="1"
+            android:layout_margin="5dp"
+            android:background="@color/button_background_color"
+            android:text="Add Notification"/>
+        <Button
+            android:id="@+id/clear_notification_button1"
+            android:layout_width="0dp"
+            android:layout_height="@dimen/button_height"
+            android:layout_weight="1"
+            android:layout_margin="5dp"
+            android:background="@color/button_background_color"
+            android:text="Clear Notification"/>
+    </com.android.car.ui.FocusArea>
+
+    <com.android.car.ui.FocusArea
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_alignParentBottom="true">
+        <TextView
+            android:layout_width="0dp"
+            android:layout_height="@dimen/button_height"
+            android:layout_weight="1"
+            android:gravity="center"
+            android:text="Not Under HUN"/>
+        <Button
+            android:id="@+id/add_notification_button2"
+            android:layout_width="0dp"
+            android:layout_height="@dimen/button_height"
+            android:layout_weight="1"
+            android:layout_margin="5dp"
+            android:background="@color/button_background_color"
+            android:text="Add Notification"/>
+        <Button
+            android:id="@+id/clear_notification_button2"
+            android:layout_width="0dp"
+            android:layout_height="@dimen/button_height"
+            android:layout_weight="1"
+            android:layout_margin="5dp"
+            android:background="@color/button_background_color"
+            android:text="Clear Notification"/>
+    </com.android.car.ui.FocusArea>
+
+</RelativeLayout>
diff --git a/RotaryPlayground/res/values/colors.xml b/RotaryPlayground/res/values/colors.xml
index b49ea51..87480a0 100644
--- a/RotaryPlayground/res/values/colors.xml
+++ b/RotaryPlayground/res/values/colors.xml
@@ -18,6 +18,7 @@
     <color name="card_background_color">#37393d</color>
     <color name="card_disabled_background_color">#61646b</color>
     <color name="grid_item_background_color">#006666</color>
+    <color name="button_background_color">#660000</color>
     <color name="button_disabled_background_color">#61646b</color>
     <color name="scroll_text_background_color">#61646b</color>
 </resources>
\ No newline at end of file
diff --git a/RotaryPlayground/res/values/dimens.xml b/RotaryPlayground/res/values/dimens.xml
index 77e907f..02a5406 100644
--- a/RotaryPlayground/res/values/dimens.xml
+++ b/RotaryPlayground/res/values/dimens.xml
@@ -24,4 +24,6 @@
     <dimen name="card_width">400dp</dimen>
     <dimen name="card_padding">20dp</dimen>
     <dimen name="description_height">200dp</dimen>
+    <!-- Notification values -->
+    <dimen name="button_height">70dp</dimen>
 </resources>
\ No newline at end of file
diff --git a/RotaryPlayground/src/com/android/car/rotaryplayground/HeadsUpNotificationFragment.java b/RotaryPlayground/src/com/android/car/rotaryplayground/HeadsUpNotificationFragment.java
new file mode 100644
index 0000000..0744ac0
--- /dev/null
+++ b/RotaryPlayground/src/com/android/car/rotaryplayground/HeadsUpNotificationFragment.java
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.car.rotaryplayground;
+
+import android.app.Notification;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.app.PendingIntent;
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+
+public class HeadsUpNotificationFragment extends Fragment {
+    private static final String NOTIFICATION_CHANNEL_ID = "rotary_notification";
+    private static final int NOTIFICATION_ID = 1;
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
+            @Nullable Bundle savedInstanceState) {
+        View view = inflater.inflate(R.layout.rotary_notification, container, false);
+        NotificationManager notificationManager =
+                getContext().getSystemService(NotificationManager.class);
+        notificationManager.createNotificationChannel(
+                new NotificationChannel(NOTIFICATION_CHANNEL_ID, "Rotary Playground",
+                        NotificationManager.IMPORTANCE_HIGH));
+        view.findViewById(R.id.add_notification_button1).setOnClickListener(
+                v -> notificationManager.notify(NOTIFICATION_ID, createNotification()));
+        view.findViewById(R.id.clear_notification_button1).setOnClickListener(
+                v -> notificationManager.cancel(NOTIFICATION_ID));
+        view.findViewById(R.id.add_notification_button2).setOnClickListener(
+                v -> notificationManager.notify(NOTIFICATION_ID, createNotification()));
+        view.findViewById(R.id.clear_notification_button2).setOnClickListener(
+                v -> notificationManager.cancel(NOTIFICATION_ID));
+
+        return view;
+    }
+
+    /**
+     * Creates a notification with CATEGORY_CALL in a channel with IMPORTANCE_HIGH. This will
+     * produce a heads-up notification even for non-system apps that aren't privileged and aren't
+     * signed with the platform key. The notification includes three actions which appear as buttons
+     * in the HUN.
+     */
+    private Notification createNotification() {
+        Intent intent = new Intent(getContext(), RotaryActivity.class);
+        PendingIntent pendingIntent = PendingIntent.getActivity(getContext(), 0, intent, 0);
+        return new Notification.Builder(getContext(), NOTIFICATION_CHANNEL_ID)
+                .setContentTitle("Example heads-up notification")
+                .setContentText("Try nudging up to HUN")
+                .setSmallIcon(R.drawable.ic_launcher)
+                .addAction(new Notification.Action.Builder(null, "Action1", pendingIntent).build())
+                .addAction(new Notification.Action.Builder(null, "Action2", pendingIntent).build())
+                .addAction(new Notification.Action.Builder(null, "Action3", pendingIntent).build())
+                .setColor(getContext().getColor(android.R.color.holo_red_light))
+                .setCategory(Notification.CATEGORY_CALL)
+                .build();
+    }
+}
diff --git a/RotaryPlayground/src/com/android/car/rotaryplayground/RotaryMenu.java b/RotaryPlayground/src/com/android/car/rotaryplayground/RotaryMenu.java
index d28d007..a1ede40 100644
--- a/RotaryPlayground/src/com/android/car/rotaryplayground/RotaryMenu.java
+++ b/RotaryPlayground/src/com/android/car/rotaryplayground/RotaryMenu.java
@@ -20,6 +20,7 @@ import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.Button;
+
 import androidx.annotation.Nullable;
 import androidx.fragment.app.Fragment;
 
@@ -33,11 +34,13 @@ public class RotaryMenu extends Fragment {
     private Fragment mRotaryCards = null;
     private Fragment mRotaryGrid = null;
     private Fragment mDirectManipulation = null;
+    private Fragment mNotificationFragment = null;
     private Fragment mScrollFragment = null;
 
     private Button mCardButton;
     private Button mGridButton;
     private Button mDirectManipulationButton;
+    private Button mNotificationButton;
     private Button mScrollButton;
 
     @Override
@@ -59,6 +62,11 @@ public class RotaryMenu extends Fragment {
         mDirectManipulationButton.setOnClickListener(
                 (v -> showDirectManipulationExamples(/* hasFocus= */ true)));
 
+        mNotificationButton = view.findViewById(R.id.notification);
+        mNotificationButton.setOnFocusChangeListener(
+                (v, hasFocus) -> showNotificationExample(hasFocus));
+        mNotificationButton.setOnClickListener(v -> showNotificationExample(/* hasFocus= */ true));
+
         mScrollButton = view.findViewById(R.id.scroll);
         mScrollButton.setOnFocusChangeListener((v, hasFocus) -> showScrollFragment(hasFocus));
         mScrollButton.setOnClickListener(v -> showScrollFragment(/* hasFocus= */ true));
@@ -98,6 +106,16 @@ public class RotaryMenu extends Fragment {
         showFragment(mDirectManipulation);
     }
 
+    private void showNotificationExample(boolean hasFocus) {
+        if (!hasFocus) {
+            return; // do nothing if no focus.
+        }
+        if (mNotificationFragment == null) {
+            mNotificationFragment = new HeadsUpNotificationFragment();
+        }
+        showFragment(mNotificationFragment);
+    }
+
     private void showScrollFragment(boolean hasFocus) {
         if (!hasFocus) {
             return; // Do nothing if no focus.