1 Android Camera2Basic Sample (Kotlin) 2 ==================================== 3 4 This sample demonstrates how to use basic functionalities of Camera2 5 API. You can learn how to iterate through characteristics of all the 6 cameras attached to the device, display a camera preview, and take 7 pictures. 8 9 Introduction 10 ------------ 11 12 The [Camera2 API][1] provides an interface to individual camera 13 devices connected to an Android device. It replaces the deprecated 14 Camera class. 15 16 Use [getCameraIdList][2] to get a list of all the available 17 cameras. You can then use [getCameraCharacteristics][3] and find the 18 best camera that suits your need (front/rear facing, resolution etc). 19 20 Create an instance of [CameraDevice.StateCallback][4] and open a 21 camera. It is ready to start camera preview when the camera is opened. 22 23 This sample uses TextureView to show the camera preview. Create a 24 [CameraCaptureSession][5] and set a repeating [CaptureRequest][6] to it. 25 26 Still image capture takes several steps. First, you need to lock the 27 focus of the camera by updating the CaptureRequest for the camera 28 preview. Then, in a similar way, you need to run a precapture 29 sequence. After that, it is ready to capture a picture. Create a new 30 CaptureRequest and call [capture][7]. Don't forget to unlock the focus 31 when you are done. 32 33 [1]: https://developer.android.com/reference/android/hardware/camera2/package-summary.html 34 [2]: https://developer.android.com/reference/android/hardware/camera2/CameraManager.html#getCameraIdList() 35 [3]: https://developer.android.com/reference/android/hardware/camera2/CameraManager.html#getCameraCharacteristics(java.lang.String) 36 [4]: https://developer.android.com/reference/android/hardware/camera2/CameraDevice.StateCallback.html 37 [5]: https://developer.android.com/reference/android/hardware/camera2/CameraCaptureSession.html 38 [6]: https://developer.android.com/reference/android/hardware/camera2/CaptureRequest.html 39 [7]: https://developer.android.com/reference/android/hardware/camera2/CameraCaptureSession.html#capture(android.hardware.camera2.CaptureRequest, android.hardware.camera2.CameraCaptureSession.CaptureCallback, android.os.Handler) 40 41 Pre-requisites 42 -------------- 43 44 - Android SDK 27 45 - Android Support Repository 46 47 Screenshots 48 ------------- 49 50 <img src="screenshots/main.png" height="400" alt="Screenshot"/> 51 52 Getting Started 53 --------------- 54 55 This sample uses the Gradle build system. To build this project, use the 56 "gradlew build" command or use "Import Project" in Android Studio. 57 58 Support 59 ------- 60 61 - Google+ Community: https://plus.google.com/communities/105153134372062985968 62 - Stack Overflow: http://stackoverflow.com/questions/tagged/android 63 64 If you've found an error in this sample, please file an issue: 65 https://github.com/googlesamples/android-Camera2Basic 66 67 Patches are encouraged, and may be submitted by forking this project and 68 submitting a pull request through GitHub. Please see CONTRIBUTING.md for more details. 69 70 License 71 ------- 72 73 Copyright 2017 The Android Open Source Project, Inc. 74 75 Licensed to the Apache Software Foundation (ASF) under one or more contributor 76 license agreements. See the NOTICE file distributed with this work for 77 additional information regarding copyright ownership. The ASF licenses this 78 file to you under the Apache License, Version 2.0 (the "License"); you may not 79 use this file except in compliance with the License. You may obtain a copy of 80 the License at 81 82 http://www.apache.org/licenses/LICENSE-2.0 83 84 Unless required by applicable law or agreed to in writing, software 85 distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 86 WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 87 License for the specific language governing permissions and limitations under 88 the License. 89
