try {
            PackageInfo v1 = getPackageManager().getPackageInfo(
                    getPackageName(), PackageManager.GET_SIGNATURES);
            for (Signature v0 : v1.signatures) {
                String v12 = v0.toString();
                int v13 = v0.hashCode(); // this is what i need via reflection of Signature API
            }
    } catch (PackageManager.NameNotFoundException e) {
    }