Camera Keep photo in GAleryPhoto

I have made an app following his tutorial "Build a Mobile App with Camera in 5 Minutes". It works well, but now I want the photo I have taken to be stored in the photo galery of the phone. But when I leave the application the photo has disappeared and has not been saved in the photo gallery of my phone. I want to know how to do it, do I have to do it through the "maping"? Please, indicate how. Thank you. attached files.
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