Essential Android JSON handling with org.json edit forum

Parsing JSON to Generic Class Object with Gson

Suppose we have a JSON stringļ¼š

["first","second","third"]

We can parse this JSON string into a String array :

Gson gson = new Gson();
String jsonArray = "[\"first\",\"second\",\"third\"]";
String[] strings = gson.fromJson(jsonArray, String[].class);

But if we want parse it into a List object, we must use TypeToken.

Here is the sample :

Gson gson = new Gson();
String jsonArray = "[\"first\",\"second\",\"third\"]";
List<String> stringList = gson.fromJson(jsonArray, new TypeToken<List<String>>() {}.getType());

Suppose we have two classes below:

public class Outer<T> {
    public int index;
    public T data;
}

public class Person {
    public String firstName;
    public String lastName;
}

and we have a JSON string that should be parsed to a Outer object.

This example shows how to parse this JSON string to the related generic class object:

String json = "......";
Type userType = new TypeToken<Outer<Person>>(){}.getType();
Result<User> userResult = gson.fromJson(json,userType);

If the JSON string should be parsed to a Outer> object :

Type userListType = new TypeToken<Outer<List<Person>>>(){}.getType();
Result<List<User>> userListResult = gson.fromJson(json,userListType);

Table Of Contents
7 JSON handling with org.json
39 ACRA
64 Menu
112 Loader
119 Xposed
132 Colors
135 Fresco
140 AdMob
147 Button
156 Vk SDK
170 XMPP
176 OpenCV
200 FileIO
203 Moshi
217 Paint
231 AIDL
241 JCodec
243 Okio
255 Looper
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