Unity Android Flashlight

using UnityEngine;
using System.Collections;
#if UNITY_ANDROID
public class FL : MonoBehaviour {

    private bool Active;
    private AndroidJavaObject camera;

    void FL_Start () {
        AndroidJavaClass cameraClass = new AndroidJavaClass("android.hardware.Camera");
        // This is an ugly hack to make Unity
        // generate Camera permisions
        WebCamDevice[] devices = WebCamTexture.devices;

        int camID = 0;
        camera = cameraClass.CallStatic<AndroidJavaObject>("open", camID);

        // I'm pretty sure camera will never be null at this point
        // It will either be a valid object or Camera.open would throw an exception
        if (camera != null)
        {
            AndroidJavaObject cameraParameters = camera.Call<AndroidJavaObject>("getParameters");
            cameraParameters.Call("setFlashMode","torch");
            camera.Call("setParameters",cameraParameters);
            Active = true;
        }
        else
        {
            Debug.LogError("[CameraParametersAndroid] Camera not available");
        }

    }

    void OnDestroy()
    {
        FL_Stop();
    }

    void FL_Stop () {

        if (camera != null)
        {
            camera.Call("stopPreview");
            camera.Call("release");
            Active = false;
        }
        else
        {
            Debug.LogError("[CameraParametersAndroid] Camera not available");
        }

    }

    // Update is called once per frame
    void Update () {

    }

    void OnGUI()
    {
        GUILayout.BeginArea(new Rect(Screen.width*0.1f,Screen.height*0.1f,Screen.width*0.3f,Screen.height*0.1f) );
        if (!Active)
        {
            if (GUILayout.Button("ENABLE FLASHLIGHT") )
                FL_Start();
        }else{
            if (GUILayout.Button("DISABLE FLASHLIGHT") )
                FL_Stop();
        }
        GUILayout.EndArea();
    }
}
#endif