I'm want to send local notification on Android with Unity3D but I don't know how to do it. Any suggestions?
If you're looking for an easy way to implement it, there's this free asset: https://assetstore.unity.com/packages/tools/integration/simple-android-notifications-free-68626
If you want to make it yourself (if you for some reason need a more complex system), you can read this discussion: https://forum.unity.com/threads/push-notifications-on-unity-android.126528/
In case the forum or the linked post shuts down, here's a general overview of the information contained within:
- There is no native Unity support for it.
- It's really difficult to build it yourself, so it is recommended you don't because there are plugins that people have already made for it.
- If you want to do it yourself, you'll have to go into the Android documentations and figure out how to communicate to it from within Unity.
Then there are a few people trying to sell their own solutions on the asset store.
So tl;dr: Use the free assets, it saves you time, money and frustration.
It can be done using FCM (Firebase Cloud Messaging)