Local Push notifications on Android using Unity3D

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http://stackoverflow.com – I managed to run local notifications with Prime31 Etcetera Android plugin and it works fine as long as app is alive in background. If you close the app completely (remove all app from task manager), it does trigger notification but it says "unfortunately your app has stopped". I want it to be working on background like IOS local push notification works. Lets say if I haven't played the game for 3days, it should pop up and ask me to play! Any idea! folks. (HowTos)