1 2 Android AlwaysOn Sample 3 =================================== 4 5 A basic sample showing how to support ambient mode for native Android Wear apps. 6 7 Introduction 8 ------------ 9 10 [WearableActivity][1] offers methods for supporting your native app staying on the screen when the Wear device enters ambient mode. 11 12 This example extends [WearableActivity][1] and overrides onEnterAmbient, onUpdateAmbient, and onExitAmbient to allow the simple native Wear app to support ambient mode. 13 14 In ambient mode, this app follows best practices by keeping most pixels black, avoiding large blocks of white pixels, using only black and white, and disabling anti-aliasing (following the [design guidelines for Watch Faces][2]). 15 16 In addition and most importantly, the app sleeps while in ambient mode for 20 seconds between any updates to conserving battery life (processor allowed to sleep). If you can hold off on updates for a full minute, you can throw away the Handler and just use onUpdateAmbient to save even more battery life. 17 18 As always, you will still want to apply the [performance guidelines][3] outlined in the Watch Faces documention to your app. 19 20 [1]: http://developer.android.com/reference/android/support/wearable/activity/WearableActivity.html 21 [2]: https://developer.android.com/training/wearables/watch-faces/designing.html#DesignGuidelines 22 [3]: https://developer.android.com/training/wearables/watch-faces/performance.html 23 24 Pre-requisites 25 -------------- 26 27 - Android SDK 25 28 - Android Build Tools v25.0.3 29 - Android Support Repository 30 31 Screenshots 32 ------------- 33 34 <img src="screenshots/1-main-active.png" height="400" alt="Screenshot"/> <img src="screenshots/2-main-ambient.png" height="400" alt="Screenshot"/> <img src="screenshots/3-main-active-round.png" height="400" alt="Screenshot"/> <img src="screenshots/4-main-ambient-round.png" height="400" alt="Screenshot"/> 35 36 Getting Started 37 --------------- 38 39 This sample uses the Gradle build system. To build this project, use the 40 "gradlew build" command or use "Import Project" in Android Studio. 41 42 Support 43 ------- 44 45 - Google+ Community: https://plus.google.com/communities/105153134372062985968 46 - Stack Overflow: http://stackoverflow.com/questions/tagged/android 47 48 If you've found an error in this sample, please file an issue: 49 https://github.com/googlesamples/android-AlwaysOn 50 51 Patches are encouraged, and may be submitted by forking this project and 52 submitting a pull request through GitHub. Please see CONTRIBUTING.md for more details. 53 54 License 55 ------- 56 57 Copyright 2017 The Android Open Source Project, Inc. 58 59 Licensed to the Apache Software Foundation (ASF) under one or more contributor 60 license agreements. See the NOTICE file distributed with this work for 61 additional information regarding copyright ownership. The ASF licenses this 62 file to you under the Apache License, Version 2.0 (the "License"); you may not 63 use this file except in compliance with the License. You may obtain a copy of 64 the License at 65 66 http://www.apache.org/licenses/LICENSE-2.0 67 68 Unless required by applicable law or agreed to in writing, software 69 distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 70 WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 71 License for the specific language governing permissions and limitations under 72 the License. 73
