You can provide a Surface by calling tSurfaceProvider(SurfaceProvider), the SurfaceProvider passes the preview Surface to be used by the camera. The Preview use case needs a Surface to display the incoming preview frames it receives from the camera. When not configured, these options will fallback to their default values which depend on the camera’s capabilities.
The rotation can also be configured, which should typically match the device’s orientation. Preview.Builder provides options to set either the target aspect ratio or resolution to be used (you can only set one of them at a time) depending on the camera’s capabilities, these options may or may not be respected, in the latter case the API will choose the closest available resolution possible. Set up the Preview use case by configuring Preview.Builder, then building it using (). Image capture: Provides a way to capture and save a photo.Īs mentioned above, using the CameraX API is -more or less- simple, you’ll see how to use each of its use cases below.Image analysis: Provides a way to process camera data (frames).Preview: Provides a way to get the camera preview stream.
Choosing which use case(s) to use depends on what you intend to use the camera for. CameraX structureĬameraX is a use case based API, it has abstracted 3 main handles which you can use to interact with the camera: Preview, Image analysis and Image capture. And since it works on devices running Android Lollipop -API 21- or newer (90% of phones in the market), camera based apps should work more consistently across a wider range of devices, from entry-level phones to flagships, especially that Google has invested in an automated test lab with hundreds of devices in order to test things such as photo capture latency, startup/shutdown latency, orientation changes and image capturing against different camera hardware levels, Android API levels, etc.
In contrast with the fine grained control camera2's API offered, CameraX (which uses the Camera2 API under the hood) aims to strike a balance between abstracting away the difficult bits of managing the camera while allowing flexibility and customization.īeside the API’s simplicity and ease of use, CameraX solves compatibility issues developers faced while accounting for device/manufacturer specific issues (Samsung and Motorola, I’m looking at you). Import. is an Android Jetpack library that was built with the intent to make camera development easier, which until now has been quite painful.
This is the code I made in other kotlin file. I am having this issue When previewing composable from file.
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