anyclass.java

try {
   sKeyPairGenerator.initialize(new KeyGenParameterSpec.Builder(KEY_ALIAS,
           KeyProperties.PURPOSE_ENCRYPT | KeyProperties.PURPOSE_DECRYPT)
           .setDigests(KeyProperties.DIGEST_SHA256, KeyProperties.DIGEST_SHA512)
           .setEncryptionPaddings(KeyProperties.ENCRYPTION_PADDING_RSA_OAEP)
           .setUserAuthenticationRequired(true)
           .build());
   sKeyPairGenerator.generateKeyPair();
   return true;
} catch (InvalidAlgorithmParameterException e) {
   e.printStackTrace();
}