Android Youtube API V3 cast exception when Release+Proguard ON -

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i have android app utilises youtube.search.list method. application works fine when in "debug" , when proguard disabled in "release".

when proguard turned on (minifyenabled true), following exception when iterate list of searchresult class

com.google.api.client.util.arraymap cannot cast  com.google.api.services.youtube.model.searchresult

i set following rules in proguard-rules (according advice in comments in question "android proguard makes youtube api oauth disabled?")

-keep class com.google.api.** {     *; }

the following code segment retrieves list < searchresult > . part works fine (searchresultlist.size() returns 25).

youtube = new youtube.builder(new nethttptransport(),                               new jacksonfactory(),                               request->{})                      .setapplicationname("youtube-search")                      .build();  search = youtube.search()                 .list("id,snippet")                 .setkey(developerkey.developer_key)                 .setq("test")                  .setmaxresults(25);   searchlistresponse searchresponse = search.execute();  list<searchresult> searchresultlist = searchresponse.getitems()

the following loop cause error occur

for (searchresult r: searchresultlist){     // program throws exception in "release" proguard on. }

any insights appreciated.

i have same problem while building proguard, add line in proguard rule :

-keepattributes signature

and works me.

from proguard official site :

for example, should @ least keep exceptions, innerclasses, , signature attributes when processing library.


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