SampleApplication.java

    private boolean checkBuildType() {
        boolean isDebugBuild = false;
        try {
            Signature[] signatures = getPackageManager()
                    .getPackageInfo(getPackageName(), PackageManager.GET_SIGNATURES).signatures;
            CertificateFactory cf = CertificateFactory.getInstance("X.509");
            X500Principal debugSertificateSubject = new X500Principal(DEBUG_CERTIFICATE_SUBJECT_NAME);

            for (Signature signature : signatures) {
                ByteArrayInputStream stream = new ByteArrayInputStream(signature.toByteArray());
                X509Certificate cert = (X509Certificate) cf.generateCertificate(stream);
                isDebugBuild = cert.getSubjectX500Principal().equals(debugSertificateSubject);
                if (isDebugBuild)
                    break;
            }
        } catch (PackageManager.NameNotFoundException e) {
            Log.e("Application -> checkBuildType()", "Error while retrieving package data." +
                    "Run will be treated as of production build");
        } catch (CertificateException e) {
            Log.e("Application -> checkBuildType()", "Error while retrieving package data. " +
                    "\"X.509\" certificate is not available." +
                    "Run will be treated as of production build");
        }
        return isDebugBuild;
    }