Communication between two apps

[carlesgutierrez]

Hi all!

I've seen just an old post about this without so much feedback. So bumping it and adding some questions about.

I'm figuring how to communicate 2 mobile Apps located in the same terminal. One is UE4 App and the other not ( last one launches a Unreal Engine App on Android for instance). Both requires share some info, text files right now.

Could work sending some TCP/UDP/WebSockets packages between 2 Apps.. Has anyone experience about it?

Also could work to share a folder for both Apps. So they can read/write there:

• Is it possible to get a generic folder path ( external ) for both Apps using any internal Android function?
• "Command line" arguments won't work. Is there something I can do pass arguments before to launch the 2nd App ( Intents ? )

Cheers!

 

[Deleted User]

You could use network sockets for direct communication between the apps.
In terms of file sharing between apps, it's possible. There's a procedure for doing it. Have a look at this:

https://developer.android.com/training/secure-file-sharing/

 

[carlesgutierrez]

Networks Sockets:

Do you know any (cross platform) market Apps doing that? Not sure how mobile SO deal with long periods of network messaging. Could provoke this some "auto closing connections" issues?​

Sharing files:

Nice reference that !

I could use this solution in 2 different ways: Way A: just share a string ( an external path folder ) or B: send the whole file from one App to the other and vice-versa. Would be easier use way A.. What about read/write data ( folder and files) access permissions for both Apps.