Start to use notification channel

- Since we rarely use notifications, we have only 1 channel
  named "Notifications".

Bug: 34129110

Test: manual
1. build eng-o and install it on O
2. export contacts and observe channel is seen

Change-Id: I38f2c57b0b9139441223c7cc94c7118d6a9fd323

1 files changed, 44 insertions, 0 deletions

diff --git a/src/com/android/contacts/util/ContactsNotificationChannelsUtil.java b/src/com/android/contacts/util/ContactsNotificationChannelsUtil.java
new file mode 100644
index 000000000..3aa75c9db
--- /dev/null
+++ b/src/com/android/contacts/util/ContactsNotificationChannelsUtil.java
@@ -0,0 +1,44 @@
+/*
+ * 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.android.contacts.util;
+
+import android.annotation.TargetApi;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.content.Context;
+import android.os.Build;
+import android.support.v4.os.BuildCompat;
+
+import com.android.contacts.R;
+
+@TargetApi(Build.VERSION_CODES.O)
+public class ContactsNotificationChannelsUtil {
+    public static String DEFAULT_CHANNEL = "DEFAULT_CHANNEL";
+
+    private ContactsNotificationChannelsUtil() {}
+
+    public static void createDefaultChannel(Context context) {
+        if (!BuildCompat.isAtLeastO()) {
+            return;
+        }
+        final NotificationManager nm = context.getSystemService(NotificationManager.class);
+        final NotificationChannel channel = new NotificationChannel(DEFAULT_CHANNEL,
+                context.getString(R.string.contacts_default_notification_channel),
+                NotificationManager.IMPORTANCE_DEFAULT);
+        nm.createNotificationChannel(channel);
+    }
+}