How is the usage of JSONObject in Android?

9 months ago

William Carter

2 minutes

In Android, the JSONObject class is a type of data structure used to represent JSON objects, allowing for the creation, parsing, and manipulation of JSON data. Here are some common methods of the JSONObject class:

Instantiate a JSONObject object:

JSONObject jsonObject = new JSONObject();

Add key-value pairs to a JSONObject object.

jsonObject.put("key1", "value1");
jsonObject.put("key2", 123);

Retrieve values from a JSONObject object:

String value1 = jsonObject.getString("key1");
int value2 = jsonObject.getInt("key2");

Check if a specific key exists in the JSONObject.

boolean containsKey = jsonObject.has("key1");

Convert the JSONObject object to a string.

String jsonString = jsonObject.toString();

Parse a JSONObject object from a string.

JSONObject newJsonObject = new JSONObject(jsonString);

Apart from the methods mentioned above, the JSONObject class also offers some other methods for manipulating JSON data, such as removing key-value pairs and obtaining a collection of keys. In Android development, the JSONObject class is often used for interacting with servers, parsing JSON data returned by servers.