ionic framework - Error: Could not find an installed version of Gradle while running on android -


i'm using ionic2 on mac: i've install android studio, sdk , jdk when run command: ionic cordova run android got error: error: not find installed version of gradle either in android studio, or on system install gradle , when run command: ionic cordova run ios got command: code signing required product type 'application' in sdk 'ios 10.0' should run in android , ios devices?


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