Interact with app when running in foreground?

[iazel]

Hello,

as per title, is there any way to exchange data between the worker isolate and the app main thread when the latter is running in the foreground?

[bakua]

Hi, you could have a look at cross isolate communication https://dart.dev/guides/language/concurrency#sending-multiple-messages-between-isolates

[iazel]

Hi, you could have a look at cross isolate communication https://dart.dev/guides/language/concurrency#sending-multiple-messages-between-isolates

Hi, thanks for the recommendation but I've already looked into it.

The issue here is that we spawn the isolate on the native side and the flutter app is completely ignorant of it. As far as I can see, there is no way to send a Port to it, hence the problem.

[Hamza5]

Hi, you could have a look at cross isolate communication https://dart.dev/guides/language/concurrency#sending-multiple-messages-between-isolates

Hi, thanks for the recommendation but I've already looked into it.

The issue here is that we spawn the isolate on the native side and the flutter app is completely ignorant of it. As far as I can see, there is no way to send a Port to it, hence the problem.

There is actually a way, using IsolateNameServer from dart:ui.
From the main isolate you should use IsolateNameServer.registerPortWithName(SendPort port, String name) to register the port, then from the work isolate you should use IsolateNameServer.lookupPortByName(String name) to get that port and send messages through it.
I am using this on Android and it is working.

[iazel]

There is actually a way, using IsolateNameServer from dart:ui. From the main isolate you should use IsolateNameServer.registerPortWithName(SendPort port, String name) to register the port, then from the work isolate you should use IsolateNameServer.lookupPortByName(String name) to get that port and send messages through it. I am using this on Android and it is working.

Oh, didn't know that, thanks for sharing! I wonder why this is in dart:ui instead of dart:isolate, quite puzzling.

[luis901101]

Duplicate of #151