Do you mean to say you want to connect to some messaging platform via API so that you can share your image ?
yes, please help me. I don't know to do it.
Intents will let you run apps that are installed on the user's phone. (For Android only.) iOS has a different mechanism (application URLs) - you need to get the URL scheme(s) for the app(s) you want to link to.
But neither of these solve the general problem. And that's the first thing you need to do: define the problem. "sharing an image" is too broad a requirement for anybody to be able to give you a solution.
There is no general solution, though. Each service has it's own API, may require you to sign-up for their developer program, and has their own rules.
I'd suggest you research each service you want to share with.
Some OSs (iOS, at least) has built-in means in the OS for some of this, but Rhodes has no specific support for this. You could write an extension.
Most/all platforms support messaging by using a special URL. However, there can be restrictions: for example, on iOS, it will bring up a system dialog with the message, and the user must hit a button to send. (No possibility of sending a message without user action.)
iOS has no public API to send images using MMS messaging.