Android Application for estimation of hearth rate via photopletysmogram, recorded by mobilephone camera. The app was developed as a simple demonstration of the capabilities of mobile phones and their sensors. Application can print measured data via Brother: QL-820NWB printer.
"A photoplethysmogram (PPG) is an optically obtained plethysmogram that can be used to detect blood volume changes in the microvascular bed of tissue. A PPG is often obtained by using a pulse oximeter which illuminates the skin and measures changes in light absorption. A conventional pulse oximeter monitors the perfusion of blood to the dermis and subcutaneous tissue of the skin." - Wikipedia
Latest version of APK is there and previous releases you can find at this link.
You need your own key.properties and hw-key.jks and you must put these files to the root folder.
key.properties
storePassword=YOUR_PASSWORD
keyPassword=YOUR_PASSWORD
keyAlias=YOUR_ALIAS
to build run:
./gradlew assembleRelease