android 8.0 notification 写法

Android NotificationChannels Sample (Kotlin) =================================== Demonstration of using channels to categorize notifications by topic. This feature was added in Android O, and allows users to have fine-grained control over their notification preferences. Introduction ------------ Android O introduces notification channels to provide a unified system to help users manage notifications. When you target Android O, you must implement one or more notification channels to display notifications to your users. You can create a notification channel for each distinct type of notification you need to send. You can also create notification channels to reflect choices made by users of your app. For example, you might setup separate notification channels for each conversation group created by a user in a messaging app. To create a channel, call `[NotificationManager.createNotificationChannels()][1]`. You can then use `[Notification.Builder.setChannel()][2]` to assign your notification to that channel. Users can now manage most of the settings associated with notifications using a consistent system UI. All notifications posted to a notification channel behave the same. To access the settings screen, use the `ACTION_CHANNEL_NOTIFICATION_SETTINGS` intent: ``` Intent intent = new Intent(Settings.ACTION_CHANNEL_NOTIFICATION_SETTINGS); intent.putExtra(Settings.EXTRA_CHANNEL_ID, mChannel.getId()); intent.putExtra(Settings.EXTRA_APP_PACKAGE, getPackageName()); startActivity(intent); ``` [1]: https://developer.android.com/reference/android/app/NotificationManager.html#createNotificationChannels(java.util.List<android.app.NotificationChannel>) [2]: https://android-dot-devsite.googleplex.com/reference/android/app/Notification.Builder.html#setChannel(java.lang.String) Pre-requisites -------------- - Android SDK Preview O - Android Build Tools v25.0.3 - Android Support Repository Screenshots ------------- <img src="screenshots/1-main.png" height="400" alt="Screenshot"/> Getting Started --------------- This sample uses the Gradle build system. To build this project, use the "gradlew build" command or use "Import Project" in Android Studio. Support ------- - Google+ Community: https://plus.google.com/communities/105153134372062985968 - Stack Overflow: http://stackoverflow.com/questions/tagged/android If you've found an error in this sample, please file an issue: https://github.com/googlesamples/android-NotificationChannels Patches are encouraged, and may be submitted by forking this project and submitting a pull request through GitHub. Please see CONTRIBUTING.md for more details. License ------- Copyright 2017 The Android Open Source Project, Inc. Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you 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.