Code snippet to determine the total force applied while shaking/moving an Android phone- for Motion based Games

gistfile1.txt

// This is accomplished by implementing android.hardware.SensorListener in an Activity
// You will also need to register for SENSOR_SERVICE using android.hardware.SensorManager

// The rules of Physics in 3-Dimensional space apply! 

public void onSensorChanged(int sensor, float[] values) {

	if (sensor == SensorManager.SENSOR_ACCELEROMETER) {
		
			double sensitivity = 1.0f; //tweak this to ignore slight hand movements.

			double forceMagnitude = 0.0f;
			forceMagnitude += Math.pow(values[SensorManager.DATA_X], 2.0);
			forceMagnitude += Math.pow(values[SensorManager.DATA_Y], 2.0);
			forceMagnitude += Math.pow(values[SensorManager.DATA_Z], 2.0);
			forceMagnitude = Math.sqrt(forceMagnitude);
			forceMagnitude = forceMagnitude / SensorManager.GRAVITY_EARTH;

			/* use the sensitivity setting in conjunction with the calculated 
        forceMagnitude to perform on-screen actions like say, moving a ball
        a certain distance etc */
      
	}
}