1 2 Android Camera2Video Sample (Kotlin) 3 ==================================== 4 5 This sample shows how to record video using the new Camera2 API in Android Lollipop. 6 7 Introduction 8 ------------ 9 10 Android Lollipop introduced a new camera API, called camera2. This sample uses [CameraDevice][1] 11 and [CameraCaptureSession][2] to record video. It also uses a custom [TextureView][3] to render the output. 12 13 The main steps are: 14 15 1. Create a custom TextureView class and add it to the layout. The purpose of the custom TextureView is 16 to be able to draw itself according to an aspect ratio, which is set via a public method. Additionally, 17 the `onMeasure(int widthMeasureSpec, int heightMeasureSpec)` method is overridden, using the aspect ratio. 18 2. Implement a `TextureView.SurfaceTextureListener` on your TextureView, and override its 19 `onSurfaceTextureSizeChanged(SurfaceTexture surfaceTexture, int width, int height)` method to calculate 20 the matrix to apply to the TextureView so the camera output fits. Use the method `setTransform(matrix)` on 21 the TextureView. 22 3. Implement a [`CameraDevice.StateCallback`][4] to receive events about changes of the state of the 23 camera device. Override its methods to set your CameraDevice instance, start the preview, and stop 24 and release the camera. 25 4. When starting the preview, set up the MediaRecorder to accept video format. 26 5. Then, set up a [`CaptureRequest.Builder`][5] using `createCaptureRequest(CameraDevice.TEMPLATE_RECORD)` 27 on your CameraDevice instance. 28 6. Then, implement a [`CameraCaptureSession.StateCallback`][6], using the method 29 `createCaptureSession(surfaces, new CameraCaptureSession.StateCallback(){})` on your CameraDevice instance, 30 where `surfaces` is a list consisting of the surface view of your TextureView and the surface of 31 your MediaRecorder instance. 32 7. Use `start()` and `stop()` methods on your MediaRecorder instance to actually start and stop the recording. 33 8. Lastly, set up and clean up your camera device in `onResume()` and `onPause()`. 34 35 36 [1]: https://developer.android.com/reference/android/hardware/camera2/CameraDevice.html 37 [2]: http://developer.android.com/reference/android/hardware/camera2/CameraCaptureSession.html 38 [3]: http://developer.android.com/reference/android/view/TextureView.html 39 [4]: https://developer.android.com/reference/android/hardware/camera2/CameraDevice.StateCallback.html 40 [5]: http://developer.android.com/reference/android/hardware/camera2/CaptureRequest.Builder.html 41 [6]: http://developer.android.com/reference/android/hardware/camera2/CameraCaptureSession.StateCallback.html 42 43 Pre-requisites 44 -------------- 45 46 - Android SDK 27 47 - Android Support Repository 48 49 Screenshots 50 ------------- 51 52 <img src="screenshots/1-launch.png" height="400" alt="Screenshot"/> 53 <img src="screenshots/2-record.png" height="400" alt="Screenshot"/> 54 <img src="screenshots/3-save.png" height="400" alt="Screenshot"/> 55 56 Getting Started 57 --------------- 58 59 This sample uses the Gradle build system. To build this project, use the 60 "gradlew build" command or use "Import Project" in Android Studio. 61 62 Support 63 ------- 64 65 - Google+ Community: https://plus.google.com/communities/105153134372062985968 66 - Stack Overflow: http://stackoverflow.com/questions/tagged/android 67 68 If you've found an error in this sample, please file an issue: 69 https://github.com/googlesamples/android-Camera2Video 70 71 Patches are encouraged, and may be submitted by forking this project and 72 submitting a pull request through GitHub. Please see CONTRIBUTING.md for more details. 73 74 License 75 ------- 76 77 Copyright 2018 The Android Open Source Project, Inc. 78 79 Licensed to the Apache Software Foundation (ASF) under one or more contributor 80 license agreements. See the NOTICE file distributed with this work for 81 additional information regarding copyright ownership. The ASF licenses this 82 file to you under the Apache License, Version 2.0 (the "License"); you may not 83 use this file except in compliance with the License. You may obtain a copy of 84 the License at 85 86 http://www.apache.org/licenses/LICENSE-2.0 87 88 Unless required by applicable law or agreed to in writing, software 89 distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 90 WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 91 License for the specific language governing permissions and limitations under 92 the License. 93
