Crash when creating a transaction on a Samsung S4 & S5 about fiskaly-kassensichv-client-java

Same problem on a Samsung S5
It works like a charm on a Samsung tab A 2016

The issue only occurs when creating a transaction.
Creating a TSS or a CLIENT work well.

[prempador]

@Greelings Which Android Version (API Version) are you using on the S4 and S5. According to other issues I have seen String.join was added in Java 8 / Android API 26. What according to https://en.wikipedia.org/wiki/Android_version_history#Android_8.0_Oreo_(API_26) should be in Version 8.0 and higher.

@prempador That's the problem. Our app is targeting devices >= API 21 (lollipop) Which represents 89.3% of the Android devices.
According to https://developer.android.com/about/dashboards, targeting devices >= API 26 will make our app compatible with only 38.7% of the Android devices. That's a serious problem for us.
Do you think possible to support devices from API 21?

Here is how you can easily solve the problem:

You can use TextUtils.join instead:

String result = TextUtils.join(", ", list);

(String.join was added in Java 8, which is why you can't use it in Android.)

Source: https://stackoverflow.com/a/33803041/5607457

[prempador]

@Greelings Thanks for the information. First I thought this was a problem on okhttp3's side. But after reading through the error more carefully I saw that this is in fact in our code. I will come back to you later after fixing this.

Ok perfect, thank you.

[auxdevelopment]

Issue should be fixed by this PR.