SignerInfo unverifiedSignerInfo = unverifiedSignerInfos[i]; String digestAlgorithmOid = unverifiedSignerInfo.getDigestAlgorithmId().getOID().toString(); String signatureAlgorithmOid = unverifiedSignerInfo .getDigestEncryptionAlgorithmId().getOID().toString(); InclusiveIntRange desiredApiLevels = InclusiveIntRange.fromTo(minSdkVersion, maxSdkVersion);