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I am making an application in Androidstudio/Java that needs to send messages constantly, consists of a trade quality evaluation program, which when evaluated as bad will be sent an sms to a specific number, but texting normally I could spend a lot with text packet ... I could link my application with some messaging app to send these "Warnings" via wifi? Example: Whatsapp or Hangouts ..
Whatsapp does not have an official published API. You can only send messages via Intent to contacts present on the same phone as your application is running.
– Max Fratane
Take a look at Slack, it looks like he can send messages to the team even when someone commits to the team project on Github, so maybe there’s a way to connect to it for your app to send automatic messages through it. Perhaps this is also the case send this as Cloud Logs, or even if you create an app that receives the messages. Also should be able to send the messages by email, and make the app pick them from the email to display in cell.
– Douglas