AdMob.java:243: error: cannot find symbol [cordova] D:\sync\websvr\ionic\test\reader\envirotech_book_reader_mobile\platforms\android\app\src\main\java\name\ratson\cordova\admob\AdMob.java:243: error: cannot find symbol [cordova] @NonNull [cordova] ^ [cordova] symbol: class NonNull [cordova] location: class name.ratson.cordova.admob.AdMob [cordova] Note: Some input files use or override a deprecated API. [cordova] Note: Recompile with -Xlint:deprecation for […]