android-heart-rate-monitor
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Lock auto-exposure of camera
When my finger touches the camera, the camera always automatically adjust exposure, so the images change regularly on a frequency of about 200Hz. I added some codes to lock AutoExposure, AutoExposureCompensation and AutoWhiteBalance.
Thanks @liqimai but it seems like you are using methods which were deprecated at API=21 http://developer.android.com/reference/android/hardware/Camera.Parameters.html
If you can update the code to use the latest API (23) then I'll merge in the pull request.