ionic framework - Cordova Build Android failed exit code 1 -


i new ionic 2 , want build apk app android error belows shows up. using ubuntu 16.04 , had installed android studio , updated sdk requirements.

cordova build android - failed! [error] error occurred while running cordova build android (exit code 1):

    android_home=/home/jayzdevera/android/sdk     java_home=/usr/lib/jvm/java-8-oracle     error: not find installed version of gradle either in android      studio,     or on system install gradle wrapper. please include gradle      in path, or install android studio


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