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I need to obtain the velocity of an android device, based on the accelerometer values. I made a code that allows me to get the accelerometer values, and then I calculate the velocity, using the formula:
v = v0 + at. (vector calculation)
My problem is that my velocity only increases and never decreases. I think the problem is that the device never gets an negative acceleration.
Can you help me with this?
Obtaining velocity from the accelerometers might not be possible (forget reliable) because at constant speed there will be no acceleration (other than gravity). You might be better off obtaining GPS location data and their associated time samples and computing velocity by distance over time.