Crash during init of UnityAds (Android)

Hey,

We are seeing random crashes during the initialization of UnityAds on devices.
* The version we use is 1.5.6-r2 (we are using UnityAds using mediation, through Fyber).

Here is the crash:

I have traced the code that is crashing, it seems that File.listFiles() may return null in some cases. The code then tries to iterate that null array:

Code (CSharp):

1. File[] fileList;
2. FilenameFilter filter;
3. File[] fileList;
4. if (_cacheDirectory.getAbsolutePath().endsWith("UnityAdsVideoCache"))
5. {
6.   UnityAdsDeviceLog.debug("Unity Ads cache: checking cache directory " + _cacheDirectory.getAbsolutePath());
7. fileList = _cacheDirectory.listFiles();
8. }
9. else
10. {
11.   UnityAdsDeviceLog.debug("Unity Ads cache: checking app directory for Unity Ads cached files");
12.   filter = new FilenameFilter()
13.   {
14.     public boolean accept(File dir, String filename)
15.     {
16.       boolean filter = filename.startsWith("UnityAds-");
17.       UnityAdsDeviceLog.debug("Unity Ads cache: filtering result for file: " + filename + ", " + filter);
18.       return filter;
19.     }
20.   };
21. fileList = _cacheDirectory.listFiles(filter);
22. }
23. for (File cacheFile : fileList)
24. {
25.     ....
26.     }
27. }

Here's the docs for listFiles() - https://docs.oracle.com/javase/7/docs/api/java/io/File.html#listFiles()

Is this a known issue? has anyone else run into this?
Is this going to be fixed? or already fixed in a newer-released version?

Thx
-liortal

 

Yes, here are examples of devices i saw it occurred on:

• OnePlus A0001
• Samsung GT-I9195
• Sony D6603
• HTC HTC One_M8
• HTC HTC_M8x
• HTC HTC Butterfly 2
• HUAWEI HUAWEI GRA-L09

I have submitted a PR to the UnityAds repo yesterday, hopefully this does resolve the issue and can be merged into the code: https://github.com/Applifier/unity-ads/pull/89