BackgroundSensors
· The backgroundsensors library is an Android library that allows to collect data from the IMU sensors (i.e., accelerometer and gyroscope) and the magnetometer (if they are present in the device). It aims to ensure the data collection while the app is in background by using foregrund services and wake locks.
Download JD-GUI to open JAR file and explore Java source code file (.class .java)
Click menu "File → Open File..." or just drag-and-drop the JAR file in the JD-GUI window background-sensors-1.2.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.