Error: /home/nmun/ionic2Folder/NotifyProject/platforms/android/gradlew: Command failed with exit code 1 Error output: FAILURE: Build failed with an exception. * What went wrong: A problem occurred configuring root project 'android'. > Cannot add task ':p

Hi, anyone here encounter this error in doing push notification with ionic 2, firebase and angular2 …
everytime i build ionic build android or ionic run android…
It give me this error…
Need helps…
Thanks…

Error: /home/nmun/ionic2Folder/NotifyProject/platforms/android/gradlew: Command failed with exit code 1 Error output:
FAILURE: Build failed with an exception.

  • What went wrong:
    A problem occurred configuring root project ‘android’.

Cannot add task ‘:processArmv7DebugGoogleServices’ as a task with that name already exists.

  • Try:
    Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.