CODEWITHSUNDEEP
javaandroidsocketstcpproject
Gvg
Gvg

Reputation: 318

Android continuous tcp polling

I am working on a project in which I can see webcam images from the people who is in front of the door on my Android app.

But I am getting a bit confused. I've managed to setup a connection with a service on my phone to a server which handles the image sending.

But i only want to get images from the server when someone presses the doorbell, so I need to send a notification or something to my app so I know there is one in front of the door, and I want to decide if I want to answer his call or not.

Now this is why I am confused: if I open the tcp socket in the android service, how can I know that my server sends a 'call' message, because the tcp socket is openend when the service is created. Do I need to keep polling every second? Then there is still a little chance that I will miss the call message?

Or do I have to run the application as server and the doorbell as client, so the client request a connection?

Upvotes: 0

Views: 604

Answers (2)

Martin James
Martin James

Reputation: 24847

If the tcp socket is opened when the service is created, just send some appropriate message from the server to connected clients. If your client is connected, it will get it. You only need to poll if the client continually connects and disconnects, eg. like many HTTP 1 web services.

Upvotes: 0

Mattias Isegran Bergander
Mattias Isegran Bergander

Reputation: 11909

Have a look at cloud to device messaging, c2dm , a lot more power efficient too. Built into android. https://developers.google.com/android/c2dm/

Upvotes: 1

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