How do you get value from Firebase?

[Jay1]

I want to create a medical app where the user will first sign up and followed by login. After login, it will bring the user to the following page to fill in medical history. However, if this is their second time login, they'll be navigate to different page instead. How do i make it so that "if there is information stored in global systolic, then redirect to VerticalArrangement4 else VerticalArrangement2.. I think my global systolic is wrong, but i have no idea how.

[Jay1]

Can someone please help? bump

[SteveJG]

Sorry but your images are illegible Jay.

You have to read the Tag of the person first.

Perhaps after you read the List of the person then chenck if systolic rate i in your List is a number VerticalArrangement2 else VerticalArrangement4.visible = true.

See Programming Your App to Make Decisions

[TIMAI2]

@Jay1

After login, it will bring the user to the following page to fill in medical history.

You do not appear to be applying any secure rules to your data in the realtime database, for personal medical history this is a must! You can use Firebase Authentication and Secure Rules to help you with this.

Firebase Security Awareness!

If like many developers, you use firebase for an online database, or for storage, and you are running your own instance of firebase, not the MIT provided instance, then you should be aware of the need to secure your data when in production. If you are working with other peoples personal data, you have a duty to protect it. For development you can set read and write as true which makes life a little easier, but when you come to production you MUST tighten up your rules, and have some form of se…

[Jay1]

Sorry, how do i actually read the tag of that particular person? If global user is my tag, and I want to read the value inside global systolic for person A.

[Jay1]

OK.. I will do it after completing this.. Thanks.