Shake Detecion for Mobile Devices in Unity (Android, iOS)

How do you detect shakes in Unity? Simple! In this tutorial you will learn how to do it by creating a simple shaking game.

ShakeDetector.cs

using UnityEngine;

[RequireComponent(typeof(PhysicsController))]
public class ShakeDetector : MonoBehaviour {

    public float ShakeDetectionThreshold;
    public float MinShakeInterval;

    private float sqrShakeDetectionThreshold;
    private float timeSinceLastShake;

    private PhysicsController physicsController;

	void Start () 
	{
        sqrShakeDetectionThreshold = Mathf.Pow(ShakeDetectionThreshold, 2);
        physicsController = GetComponent<PhysicsController>();
	}
	
	void Update () 
	{
		if (Input.acceleration.sqrMagnitude >= sqrShakeDetectionThreshold
            && Time.unscaledTime >= timeSinceLastShake + MinShakeInterval)
        {
            physicsController.ShakeRigidbodies(Input.acceleration);
            timeSinceLastShake = Time.unscaledTime;
        }
	}
}

PhysicsController.cs

using UnityEngine;

public class PhysicsController : MonoBehaviour {

    public float ShakeForceMultiplier;
    public Rigidbody2D[] ShakingRigidbodies;

    public void ShakeRigidbodies(Vector3 deviceAcceleration)
    {
        foreach (var rigidbody in ShakingRigidbodies)
        {
            rigidbody.AddForce(deviceAcceleration * ShakeForceMultiplier, ForceMode2D.Impulse);
        }
    }
}