How do I parse inner JSON?

Answered by Jarrod Smith

To parse inner JSON, you can use the `getString(index)` method of the `JSONArray` class. This method allows you to retrieve a string value at the specified position in the JSON array.

When dealing with nested JSON objects, it is important to understand the structure of the JSON data and access the inner objects accordingly. JSON objects can contain arrays, which can further contain objects or values.

Here is an example to illustrate how to parse inner JSON:

Suppose we have the following JSON data:
“name”: “John”,
“age”: 30,
“address”: {
“street”: “123 Main St”,
“city”: “New York”,
“country”: “USA”

To parse the inner JSON object `address`, you would do the following:

1. Parse the root JSON object:
String jsonString = “{ \”name\”: \”John\”, \”age\”: 30, \”address\”: { \”street\”: \”123 Main St\”, \”city\”: \”New York\”, \”country\”: \”USA\” } }”;
JSONObject jsonObject = new JSONObject(jsonString);

2. Access the inner JSON object `address`:
JSONObject addressObject = jsonObject.getJSONObject(“address”);

3. Parse the values of the inner JSON object:
String street = addressObject.getString(“street”);
String city = addressObject.getString(“city”);
String country = addressObject.getString(“country”);

In this example, `addressObject` represents the inner JSON object `address`. We then use `getString()` to retrieve the values of the `street`, `city`, and `country` fields within the `address` object.

It is important to note that the `getString()` method assumes that the value at the specified index is a string. If the value is not a string, it will throw a `JSONException`. Therefore, make sure to handle potential exceptions when parsing JSON data.

Parsing inner JSON involves accessing the nested objects or arrays using appropriate methods provided by the JSON library you are using. By understanding the structure of the JSON data, you can navigate through the nested objects to extract the desired values.