boolean getTorchState(Camera camera) {
    if (camera != null) {
      Camera.Parameters parameters = camera.getParameters();
      if (parameters != null) {
        String flashMode = parameters.getFlashMode();
        return flashMode != null &&
            (Camera.Parameters.FLASH_MODE_ON.equals(flashMode) ||
             Camera.Parameters.FLASH_MODE_TORCH.equals(flashMode));
      }
    }
    return false;
  }

  void setTorch(Camera camera, boolean newSetting) {
    Camera.Parameters parameters = camera.getParameters();
    doSetTorch(parameters, newSetting, false);
    camera.setParameters(parameters);
  }

  private void initializeTorch(Camera.Parameters parameters, SharedPreferences prefs, boolean safeMode) {
    boolean currentSetting = FrontLightMode.readPref(prefs) == FrontLightMode.ON;
    doSetTorch(parameters, currentSetting, safeMode);
  }

  private void doSetTorch(Camera.Parameters parameters, boolean newSetting, boolean safeMode) {
    CameraConfigurationUtils.setTorch(parameters, newSetting);
    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
    if (!safeMode && !prefs.getBoolean(PreferencesActivity.KEY_DISABLE_EXPOSURE, true)) {
      CameraConfigurationUtils.setBestExposure(parameters, newSetting);
    }
  }