1 2 Android Camera2Basic Sample 3 =================================== 4 5 This sample demonstrates how to use basic functionalities of Camera2 6 API. You can learn how to iterate through characteristics of all the 7 cameras attached to the device, display a camera preview, and take 8 pictures. 9 10 Introduction 11 ------------ 12 13 The [Camera2 API][1] provides an interface to individual camera 14 devices connected to an Android device. It replaces the deprecated 15 Camera class. 16 17 Use [getCameraIdList][2] to get a list of all the available 18 cameras. You can then use [getCameraCharacteristics][3] and find the 19 best camera that suits your need (front/rear facing, resolution etc). 20 21 Create an instance of [CameraDevice.StateCallback][4] and open a 22 camera. It is ready to start camera preview when the camera is opened. 23 24 This sample uses TextureView to show the camera preview. Create a 25 [CameraCaptureSession][5] and set a repeating [CaptureRequest][6] to it. 26 27 Still image capture takes several steps. First, you need to lock the 28 focus of the camera by updating the CaptureRequest for the camera 29 preview. Then, in a similar way, you need to run a precapture 30 sequence. After that, it is ready to capture a picture. Create a new 31 CaptureRequest and call [capture][7]. Don't forget to unlock the focus 32 when you are done. 33 34 [1]: https://developer.android.com/reference/android/hardware/camera2/package-summary.html 35 [2]: https://developer.android.com/reference/android/hardware/camera2/CameraManager.html#getCameraIdList() 36 [3]: https://developer.android.com/reference/android/hardware/camera2/CameraManager.html#getCameraCharacteristics(java.lang.String) 37 [4]: https://developer.android.com/reference/android/hardware/camera2/CameraDevice.StateCallback.html 38 [5]: https://developer.android.com/reference/android/hardware/camera2/CameraCaptureSession.html 39 [6]: https://developer.android.com/reference/android/hardware/camera2/CaptureRequest.html 40 [7]: https://developer.android.com/reference/android/hardware/camera2/CameraCaptureSession.html#capture(android.hardware.camera2.CaptureRequest, android.hardware.camera2.CameraCaptureSession.CaptureCallback, android.os.Handler) 41 42 Pre-requisites 43 -------------- 44 45 - Android SDK 24 46 - Android Build Tools v24.0.1 47 - Android Support Repository 48 49 Screenshots 50 ------------- 51 52 <img src="screenshots/main.png" height="400" alt="Screenshot"/> 53 54 Getting Started 55 --------------- 56 57 This sample uses the Gradle build system. To build this project, use the 58 "gradlew build" command or use "Import Project" in Android Studio. 59 60 Support 61 ------- 62 63 - Google+ Community: https://plus.google.com/communities/105153134372062985968 64 - Stack Overflow: http://stackoverflow.com/questions/tagged/android 65 66 If you've found an error in this sample, please file an issue: 67 https://github.com/googlesamples/android-Camera2Basic 68 69 Patches are encouraged, and may be submitted by forking this project and 70 submitting a pull request through GitHub. Please see CONTRIBUTING.md for more details. 71 72 License 73 ------- 74 75 Copyright 2016 The Android Open Source Project, Inc. 76 77 Licensed to the Apache Software Foundation (ASF) under one or more contributor 78 license agreements. See the NOTICE file distributed with this work for 79 additional information regarding copyright ownership. The ASF licenses this 80 file to you under the Apache License, Version 2.0 (the "License"); you may not 81 use this file except in compliance with the License. You may obtain a copy of 82 the License at 83 84 http://www.apache.org/licenses/LICENSE-2.0 85 86 Unless required by applicable law or agreed to in writing, software 87 distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 88 WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 89 License for the specific language governing permissions and limitations under 90 the License. 91
