Switch ON / OFF Flash in Android

CameraFlash-TurnOFF

public void turnOFF()
{
  param = cam.getParameters();
  param.setFlashMode(Camera.Parameters.FLASH_MODE_OFF);
  cam.setParameters(param);
  cam.stopPreview();
  cam.release();
  cam=null;
}

CameraFlash-TurnON

Camera cam;
public void turnON()
{
  Camera cam = Camera.open();
  Camera.Parameters param = cam.getParameters();
  try {
      cam.setPreviewTexture(new SurfaceTexture(0));
  } catch (IOException e) {
       e.printStackTrace();
    }
  param.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH);
  cam.setParameters(param);
  cam.startPreview();
}