/**
 * Checks if API is supported and all cameras have better than legacy support.
 */
public static boolean isSupported(Context context) {
  if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
    return false;
  }

  CameraManager cameraManager = (CameraManager) context.getSystemService(Context.CAMERA_SERVICE);
  try {
    String[] cameraIds = cameraManager.getCameraIdList();
    for (String id : cameraIds) {
      CameraCharacteristics characteristics = cameraManager.getCameraCharacteristics(id);
      if (characteristics.get(CameraCharacteristics.INFO_SUPPORTED_HARDWARE_LEVEL)
          == CameraCharacteristics.INFO_SUPPORTED_HARDWARE_LEVEL_LEGACY) {
        return false;
      }
    }
  } catch (AndroidException e) {
    Logging.e(TAG, "Camera access exception: " + e);
    return false;
  }
  return true;
}
 

/**
 * Checks if API is supported and all cameras have better than legacy support.
 */
public static boolean isSupported(Context context) {
  if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
    return false;
  }

  CameraManager cameraManager = (CameraManager) context.getSystemService(Context.CAMERA_SERVICE);
  try {
    String[] cameraIds = cameraManager.getCameraIdList();
    for (String id : cameraIds) {
      CameraCharacteristics characteristics = cameraManager.getCameraCharacteristics(id);
      if (characteristics.get(CameraCharacteristics.INFO_SUPPORTED_HARDWARE_LEVEL)
          == CameraCharacteristics.INFO_SUPPORTED_HARDWARE_LEVEL_LEGACY) {
        return false;
      }
    }
    // On Android OS pre 4.4.2, a class will not load because of VerifyError if it contains a
    // catch statement with an Exception from a newer API, even if the code is never executed.
    // https://code.google.com/p/android/issues/detail?id=209129
  } catch (/* CameraAccessException */ AndroidException e) {
    Logging.e(TAG, "Camera access exception: " + e);
    return false;
  }
  return true;
}
 

@Override
public String[] getDeviceNames() {
  try {
    return cameraManager.getCameraIdList();
    // On Android OS pre 4.4.2, a class will not load because of VerifyError if it contains a
    // catch statement with an Exception from a newer API, even if the code is never executed.
    // https://code.google.com/p/android/issues/detail?id=209129
  } catch (/* CameraAccessException */ AndroidException e) {
    Logging.e(TAG, "Camera access exception: " + e);
    return new String[] {};
  }
}
 

private   CameraCharacteristics getCameraCharacteristics(String deviceName) {
  try {
    return cameraManager.getCameraCharacteristics(deviceName);
    // On Android OS pre 4.4.2, a class will not load because of VerifyError if it contains a
    // catch statement with an Exception from a newer API, even if the code is never executed.
    // https://code.google.com/p/android/issues/detail?id=209129
  } catch (/* CameraAccessException */ AndroidException e) {
    Logging.e(TAG, "Camera access exception: " + e);
    return null;
  }
}
 

@Override
public String[] getDeviceNames() {
  try {
    return cameraManager.getCameraIdList();
    // On Android OS pre 4.4.2, a class will not load because of VerifyError if it contains a
    // catch statement with an Exception from a newer API, even if the code is never executed.
    // https://code.google.com/p/android/issues/detail?id=209129
  } catch (/* CameraAccessException */ AndroidException e) {
    Logging.e(TAG, "Camera access exception: " + e);
    return new String[] {};
  }
}
 

private CameraCharacteristics getCameraCharacteristics(String deviceName) {
  try {
    return cameraManager.getCameraCharacteristics(deviceName);
    // On Android OS pre 4.4.2, a class will not load because of VerifyError if it contains a
    // catch statement with an Exception from a newer API, even if the code is never executed.
    // https://code.google.com/p/android/issues/detail?id=209129
  } catch (/* CameraAccessException */ AndroidException e) {
    Logging.e(TAG, "Camera access exception: " + e);
    return null;
  }
}