How to use PackageInfo.GET_SIGNING_CERTIFICATES in API 28?

Question

The documentation of PackageManager.GET_SIGNATURES says \"This constant was deprecated in API level 28. Use GET_SIGNING_CERTIFICATES instead\".

Unfortunately it was

Answer 1

My solution is:

In the gradle build set "compileSdkVersion 28" and "targetSdkVersion 28", now you can use this sample code:

try {
    if(Build.VERSION.SDK_INT >= 28) {
        @SuppressLint("WrongConstant") final PackageInfo packageInfo = getPackageManager().getPackageInfo(getPackageName(), PackageManager.GET_SIGNING_CERTIFICATES);
        final Signature[] signatures = packageInfo.signingInfo.getApkContentsSigners();
        final MessageDigest md = MessageDigest.getInstance("SHA");
        for (Signature signature : signatures) {
            md.update(signature.toByteArray());
            final String signatureBase64 = new String(Base64.encode(md.digest(), Base64.DEFAULT));
            Log.d("Signature Base64", signatureBase64);
        }
    }
} catch (PackageManager.NameNotFoundException | NoSuchAlgorithmException e) {
    e.printStackTrace();
}

If strangely Android Studio does not recognize the constant GET_SIGNING_CERTIFICATES you can use the @SuppressLint ("WrongConstant") annotation.