android - Get Posts with substring of key "send_to_members" with has comma separated values using FirebaseRecyclerAdapter in adnroid -


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this structure in firebase db.how query in firebaserecycleradapter.i have tried not work.

 private firebaserecycleradapter<newpost, newpostviewholder> getfirebaserecycleradapter(query query) {     return new firebaserecycleradapter<newpost, newpostviewholder>(             newpost.class, r.layout.post_item, newpostviewholder.class, query.orderbychild("send_to_members").equalto(student_id)) {         @override         public void populateviewholder(final newpostviewholder postviewholder,                                        final newpost post, final int position)         {  }          @override         public void onviewrecycled(newpostviewholder holder) {             super.onviewrecycled(holder);          }      };


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