How do you parse a JSON string in MIT App inventor?

MIT App Inventor Help
1

I have this FoodRequests in FBD:
image
When I read it back like this
image
I get a JSON string like {"user1":""NonVeg-HSL, Dal-LSL & DAL-HSL, 2, .....user2 .... user3...""}
Question is how do I parse this JSON string to get user1 and the corresponding properties, user2 and properties, user3 ... basically dump of ProjectBucket FoodRequestDB so that I can fill the appropriate Textboxes/Labels to display them to the user in a neat order.
Please advice thanks

2

The Web component has a block, DecodeJSONWithDictionaries
that should work for you.

1 Like
3

Thanks ABG I had seen the Web component in plenty examples but had not realized it was a component. Today I finally found it under Connectivity. Then there are lot of DB's under Storage too. So far all my work was centered around the Experimental - FirebaseDB.

4

Thanks for the response.

I shall have to expand my future recommendations of the Web component to include mention of which Drawer has it, like the Clock component in the Sensors drawer.

5

HOW TO PARSE THIS: semesterUrls using jsonParse extension
and show as a list

[
  {
    "branchCode": "IOT",
    "branchName": "Internet of Things",
    "semesters": {
      "semester1": "https://example.com/syllabus/iot/sem1.pdf",
      "semester2": "https://example.com/syllabus/iot/sem2.pdf",
      "semester3": "https://example.com/syllabus/iot/sem3.pdf",
      "semester4": "https://example.com/syllabus/iot/sem4.pdf",
      "semester5": "https://example.com/syllabus/iot/sem5.pdf",
      "semester6": "https://example.com/syllabus/iot/sem6.pdf",
      "semester7": "https://example.com/syllabus/iot/sem7.pdf",
      "semester8": "https://example.com/syllabus/iot/sem8.pdf"
    }
  },
  {
    "branchCode": "AIML",
    "branchName": "Artificial Intelligence & Machine Learning",
    "semesterUrls": [
      "https://example.com/syllabus/aiml/sem1.pdf",
      "https://example.com/syllabus/aiml/sem2.pdf",
      "https://example.com/syllabus/aiml/sem3.pdf",
      "https://example.com/syllabus/aiml/sem4.pdf",
      "https://example.com/syllabus/aiml/sem5.pdf",
      "https://example.com/syllabus/aiml/sem6.pdf",
      "https://example.com/syllabus/aiml/sem7.pdf",
      "https://example.com/syllabus/aiml/sem8.pdf"
    ]
  }
]

here my try blocks
image

6

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