*A fork of [Dylan McIntyre's CameraKit-Android library](https://github.com/gogopop/CameraKit-Android), originally a fork of [Google's CameraView library](https://github.com/google/cameraview). The CameraKit-Android at this point has been fairly rewritten and refactored:*
- lots *of serious bugs fixed, I have lost the count*
- *decent orientation support*
- *EXIF support*
- *simpler APIs*
- *docs and comments in code*
- *introduced sessionType (picture or video), replacing Method and Permissions stuff*
- *new `setLocation` and `setWhiteBalance` APIs*
- *option to pass a `File` when recording a video*
- *introduced a smart measuring and sizing behavior, replacing bugged `adjustViewBounds`*
- *measure `CameraView` as center crop or center inside*
CameraKit is an easy to use utility to work with the Android Camera APIs. Everything at the moment is work in progress, but it works well for pictures at least.
To capture video just call `CameraView.startRecordingVideo(file)` to start, and `CameraView.stopRecordingVideo()` to finish. Make sure you setup a `CameraListener` to handle the video callback.
`CameraView` has a smart measuring behavior that will let you do what you want with a few flags.
Measuring is controlled simply by `layout_width` and `layout_height` attributes, with this meaning:
-`WRAP_CONTENT` : try to stretch this dimension to respect the preview aspect ratio.
-`MATCH_PARENT` : fill this dimension, even if this means ignoring the aspect ratio.
- Fixed values (e.g. `500dp`) : respect this dimension.
You can have previews of all sizes, not just the supported presets. Whaterever you do, the preview will never be distorted.
### Center inside
You can emulate a **center inside** behavior (like the `ImageView` scaletype) by setting both dimensions to `wrap_content`. The camera will get the biggest possible size that fits into your bounds, just like what happens with image views.
```xml
<com.flurgle.camerakit.CameraView
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
```
This means that the whole preview is visible, and the image output matches what was visible during the capture.
### Center crop
You can emulate a **center crop** behavior by setting both dimensions to fixed values or to `MATCH_PARENT`. The camera view will fill the rect. If your dimensions don't match the aspect ratio of the internal preview surface, the surface will be cropped to fill the view, just like `android:scaleType="centerCrop"` on an `ImageView`.
```xml
<com.flurgle.camerakit.CameraView
android:layout_width="match_parent"
android:layout_height="match_parent" />
```
This means that part of the preview is hidden, and the image output will contain parts of the scene that were not visible during the capture. If this is a problem, see [cameraCropOutput](#cameracropoutput).
What to capture - either picture or video. This has a couple of consequences:
- Sizing: capture and preview size are chosen among the available picture or video sizes, depending on the flag
- Picture capturing: **you can capture pictures during a `video` session**, though they will be captured as 'screenshots' of preview frames. This is fast and thus works well with slower camera sensors, but the captured image can be blurry or noisy.
- Permission behavior: when requesting a `video` session, the record audio permission will be requested. If this is needed, the audio permission should be added to your manifest or the app will crash.
Focus behavior. Can be off, continuous (camera continuously tries to adapt its focus), tap (focus is driven by the user tap) and tapWithMarker (a marker is drawn on screen to indicate focusing).
How to capture pictures, either standard or frame. The frame option lets you capture and save a preview frame, which can be better with slower camera sensors, though the captured image can be blurry or noisy.
Either picture or video. This tells the library which permissions should be asked before starting the camera session. In the case of 'picture', we require the camera permissions. In the case of 'video', the record audio permission is asked as well.
Please note that, if needed, the latter should be added to your manifest file or the app will crash.
You can handle permissions yourself and then call `CameraView.start()` once they are acquired. If they are not, `CameraView` will request permissions to the user based on the `sessionType` that was set. In that case, you can restart the camera if you have a successful response from `onRequestPermissionResults()`.
