92 lines
4.2 KiB
Markdown
92 lines
4.2 KiB
Markdown
|
|
Android Camera2Video Sample
|
|
===================================
|
|
|
|
This sample shows how to record video using the new Camera2 API in Android Lollipop.
|
|
|
|
Introduction
|
|
------------
|
|
|
|
Android Lollipop introduced a new camera API, called camera2. This sample uses [CameraDevice][1]
|
|
and [CameraCaptureSession][2] to record video. It also uses a custom [TextureView][3] to render the output.
|
|
|
|
The main steps are:
|
|
|
|
1. Create a custom TextureView class and add it to the layout. The purpose of the custom TextureView is
|
|
to be able to draw itself according to an aspect ratio, which is set via a public method. Additionally,
|
|
the `onMeasure(int widthMeasureSpec, int heightMeasureSpec)` method is overridden, using the aspect ratio.
|
|
2. Implement a `TextureView.SurfaceTextureListener` on your TextureView, and override its
|
|
`onSurfaceTextureSizeChanged(SurfaceTexture surfaceTexture, int width, int height)` method to calculate
|
|
the matrix to apply to the TextureView so the camera output fits. Use the method `setTransform(matrix)` on
|
|
the TextureView.
|
|
3. Implement a [`CameraDevice.StateCallback`][4] to receive events about changes of the state of the
|
|
camera device. Override its methods to set your CameraDevice instance, start the preview, and stop
|
|
and release the camera.
|
|
4. When starting the preview, set up the MediaRecorder to accept video format.
|
|
5. Then, set up a [`CaptureRequest.Builder`][5] using `createCaptureRequest(CameraDevice.TEMPLATE_RECORD)`
|
|
on your CameraDevice instance.
|
|
6. Then, implement a [`CameraCaptureSession.StateCallback`][6], using the method
|
|
`createCaptureSession(surfaces, new CameraCaptureSession.StateCallback(){})` on your CameraDevice instance,
|
|
where `surfaces` is a list consisting of the surface view of your TextureView and the surface of
|
|
your MediaRecorder instance.
|
|
7. Use `start()` and `stop()` methods on your MediaRecorder instance to actually start and stop the recording.
|
|
8. Lastly, set up and clean up your camera device in `onResume()` and `onPause()`.
|
|
|
|
|
|
[1]: https://developer.android.com/reference/android/hardware/camera2/CameraDevice.html
|
|
[2]: http://developer.android.com/reference/android/hardware/camera2/CameraCaptureSession.html
|
|
[3]: http://developer.android.com/reference/android/view/TextureView.html
|
|
[4]: https://developer.android.com/reference/android/hardware/camera2/CameraDevice.StateCallback.html
|
|
[5]: http://developer.android.com/reference/android/hardware/camera2/CaptureRequest.Builder.html
|
|
[6]: http://developer.android.com/reference/android/hardware/camera2/CameraCaptureSession.StateCallback.html
|
|
|
|
Pre-requisites
|
|
--------------
|
|
|
|
- Android SDK 27
|
|
- Android Build Tools v27.0.2
|
|
- Android Support Repository
|
|
|
|
Screenshots
|
|
-------------
|
|
|
|
<img src="screenshots/1-launch.png" height="400" alt="Screenshot"/> <img src="screenshots/2-record.png" height="400" alt="Screenshot"/> <img src="screenshots/3-save.png" height="400" alt="Screenshot"/>
|
|
|
|
Getting Started
|
|
---------------
|
|
|
|
This sample uses the Gradle build system. To build this project, use the
|
|
"gradlew build" command or use "Import Project" in Android Studio.
|
|
|
|
Support
|
|
-------
|
|
|
|
- Google+ Community: https://plus.google.com/communities/105153134372062985968
|
|
- Stack Overflow: http://stackoverflow.com/questions/tagged/android
|
|
|
|
If you've found an error in this sample, please file an issue:
|
|
https://github.com/googlesamples/android-Camera2Video
|
|
|
|
Patches are encouraged, and may be submitted by forking this project and
|
|
submitting a pull request through GitHub. Please see CONTRIBUTING.md for more details.
|
|
|
|
License
|
|
-------
|
|
|
|
Copyright 2017 The Android Open Source Project, Inc.
|
|
|
|
Licensed to the Apache Software Foundation (ASF) under one or more contributor
|
|
license agreements. See the NOTICE file distributed with this work for
|
|
additional information regarding copyright ownership. The ASF licenses this
|
|
file to you under the Apache License, Version 2.0 (the "License"); you may not
|
|
use this file except in compliance with the License. You may obtain a copy of
|
|
the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
License for the specific language governing permissions and limitations under
|
|
the License.
|