CameraView supports different types of previews, configurable either through the cameraPreview XML attribute or programmatically with the Preview control class.

This defaults to the new GL_SURFACE and it is highly recommended that you do not change this to use all the features available. However, experienced user might prefer a different solution.

Options

Preview Backed by Info
Preview.SURFACE A SurfaceView This might be better for battery, but will not work well (AFAIR) with dynamic layout changes and similar things. No support for video snapshots.
Preview.TEXTURE A TextureView Better. Requires hardware acceleration. No support for video snapshots.
Preview.GL_SURFACE A GLSurfaceView Supports video snapshots. Might support GL real time filters in the future.

The GL surface, as an extra benefit, has a much more efficient way of capturing picture snapshots, that avoids OOM errors, rotating the image on the fly, reading EXIF, and other horrible things belonging to v1. These picture snapshots will also work while taking videos.

XML Attributes

<com.otaliastudios.cameraview.CameraView
    app:cameraPreview="surface|texture|glSurface"/>

The preview method should only be called once and if the CameraView was never added to a window, for example if you just created it programmatically. Otherwise, it has no effect.

Method Description
setPreview(Preview) Sets the preview implementation.