Error testing app via Smartphone

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When I try to test my application via Smartphone appears this error.

12:34:20 Session 'app': Error Installing APK

This message appears in Debug

com.android.ddmlib.Adbcommandrejectedexception: device unauthorized. This adb server’s $ADB_VENDOR_KEYS is not set Try 'adb Kill-server' if that seems Wrong. Otherwise check for a confirmation dialog on your device. Error while Installing APK

Someone can help me?

  • 1

    You could detail your mistake better?

  • It seems to me to be some option on the smartphone, something appears there?

  • Nothing appears on the phone, but it may be some configuration... I’m looking here.

  • 1

    Checks if USB debugging there in the developer options is active, if you have attempts to revoke the usb debugging authorizations, and connect again, and allow debugging again

  • Try checking if USB debugging is active!

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