How to Efficiently Extract and Concatenate Names from a JSONArray in Android?

Parsing JSONArrays in Android

When working with complex JSON data, arrays of objects known as JSONArrays often arise. Parsing these arrays can be a common challenge, as exemplified by the following JSON snippet:

"abridged_cast": [
    {
        "name": "Jeff Bridges",
        "id": "162655890",
        "characters": [
            "Jack Prescott"
        ]
    },
    // ...
]

Problem Statement:

The goal is to extract the "name" property from each object in the "abridged_cast" JSONArray and concatenate them into a single string.

Solution:

The provided code attempts to access the "characters" array within the JSON, which is incorrect for this purpose. To retrieve the names, the following steps should be taken:

// Assuming `jsonResponse` is the JSONObject containing the JSON snippet

JSONArray abridgedCast = jsonResponse.getJSONArray("abridged_cast");

List<String> allNames = new ArrayList<>();
for (int i = 0; i < abridgedCast.length(); i++) {
    JSONObject actor = abridgedCast.getJSONObject(i);
    String name = actor.getString("name");
    allNames.add(name);
}

String allNamesString = String.join(", ", allNames);

In this code:

1. We obtain the "abridged_cast" JSONArray.
2. We iterate through each object in the JSONArray.
3. Inside the loop, we retrieve the "name" property from the current object.
4. We add the name to an ArrayList of strings.
5. Finally, we join the ArrayList elements into a comma-separated string.

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