1 2Android Camera2Basic Sample 3=================================== 4 5This sample demonstrates how to use basic functionalities of Camera2 6API. You can learn how to iterate through characteristics of all the 7cameras attached to the device, display a camera preview, and take 8pictures. 9 10Introduction 11------------ 12 13The [Camera2 API][1] provides an interface to individual camera 14devices connected to an Android device. It replaces the deprecated 15Camera class. 16 17Use [getCameraIdList][2] to get a list of all the available 18cameras. You can then use [getCameraCharacteristics][3] and find the 19best camera that suits your need (front/rear facing, resolution etc). 20 21Create an instance of [CameraDevice.StateCallback][4] and open a 22camera. It is ready to start camera preview when the camera is opened. 23 24This sample uses TextureView to show the camera preview. Create a 25[CameraCaptureSession][5] and set a repeating [CaptureRequest][6] to it. 26 27Still image capture takes several steps. First, you need to lock the 28focus of the camera by updating the CaptureRequest for the camera 29preview. Then, in a similar way, you need to run a precapture 30sequence. After that, it is ready to capture a picture. Create a new 31CaptureRequest and call [capture][7]. Don't forget to unlock the focus 32when 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 42Pre-requisites 43-------------- 44 45- Android SDK 28 46- Android Build Tools v28.0.3 47- Android Support Repository 48 49Screenshots 50------------- 51 52<img src="screenshots/main.png" height="400" alt="Screenshot"/> 53 54Getting Started 55--------------- 56 57This sample uses the Gradle build system. To build this project, use the 58"gradlew build" command or use "Import Project" in Android Studio. 59 60Support 61------- 62 63- Google+ Community: https://plus.google.com/communities/105153134372062985968 64- Stack Overflow: http://stackoverflow.com/questions/tagged/android 65 66If you've found an error in this sample, please file an issue: 67https://github.com/googlesamples/android-Camera2Basic 68 69Patches are encouraged, and may be submitted by forking this project and 70submitting a pull request through GitHub. Please see CONTRIBUTING.md for more details. 71 72License 73------- 74 75Copyright 2019 The Android Open Source Project, Inc. 76 77Licensed to the Apache Software Foundation (ASF) under one or more contributor 78license agreements. See the NOTICE file distributed with this work for 79additional information regarding copyright ownership. The ASF licenses this 80file to you under the Apache License, Version 2.0 (the "License"); you may not 81use this file except in compliance with the License. You may obtain a copy of 82the License at 83 84http://www.apache.org/licenses/LICENSE-2.0 85 86Unless required by applicable law or agreed to in writing, software 87distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 88WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 89License for the specific language governing permissions and limitations under 90the License. 91
