How to Parse a Local JSON File from Assets into a ListView?

How can I parse a local JSON file from assets folder into a ListView?

When working with local JSON files stored in the assets folder, you can parse them into a ListView for display using the following steps:

1. Read the JSON File: Retrieve the JSON file from the assets folder using the AssetJSONFile() method to obtain its content as a string.
2. Create a JSON Object: Parse the JSON string into a JSONObject using JSONObject(jsonString) to represent its hierarchical structure.

3. Extract Data: Access the desired data within the JSON hierarchy by traversing through objects and arrays. For instance, you can retrieve the formulas as follows:

   JSONObject formArray = json.getJSONObject("formules");
   String formule = formArray.getString("formule");
   String url = formArray.getString("url");

4. Populate the ListView: Once you have the data, you can create a HashMap to store the formula and URL information and add it to an ArrayList>. The ListView can then be populated with this data using an adapter.

   ArrayList<HashMap<String, String>> formList = new ArrayList<>();
   HashMap<String, String> formulaMap = new HashMap<>();
   formulaMap.put("formule", formule);
   formulaMap.put("url", url);
   formList.add(formulaMap);
   
   // Set ListView adapter
   ListView categoriesL = (ListView) findViewById(R.id.listFormulas);
   ArrayAdapter adapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, formList);
   categoriesL.setAdapter(adapter);

By following these steps, you can effectively parse a local JSON file from the assets folder into a ListView for display in your app.

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