你调用另一个JSON字符串只是一个json对象。从字符串更改Map值类型为 Object ：TypeToken>

  String jsonString ={\key1 \：\val1 \，\key2 \：\val2 \，\key3 \：{\subkey1 \ ：\ subvalue1\ \ subkey2\：\ subvalue2\}，\ key4\：\ val3\}; 

地图< String，Object> map = new Gson（）。fromJson（jsonString，new TypeToken< Map< String，Object>>（）{
} .getType（））; 
 

上面的例子适用于GSON 2.2.2。并且sysout（map）产生

$ p $ lt; code> {key1 = val1，key2 = val2，key3 = {subkey1 = subvalue1，subkey2 = subvalue2} ，key4 = val3}

作为一个小改进，我建议您明确指定地图类型参数，并使用Map而不是HashMap作为TypeToken。

I have JSON string with dynamic elements, till now I parse it into Map:

Map map = new Gson().fromJson(jsonString, 
        new TypeToken<HashMap<String, String>>() {}.getType());

Now I need to solve thsi situation - one of these dynamic variables could be another JSON string.

Do you have some advice ho to solve it? Thanks in advance.

EDIT: JSON string example added (formatted):

{
    "key1": "val1",
    "key2": "val2",
    "key3": {
        "subkey1": [
            "subvalue1",
            "subvalue1"
        ],
        "subkey‌​2": [
            "subvalue2"
        ]
    },
    "key4": "val3"
}

What you call another JSON string is just a json object. Change the Map value type to Object from String: TypeToken>

String jsonString = "{\"key1\":\"val1\",\"key2\":\"val2\",\"key3\": {\"subkey1\":\"subvalue1\",\"subkey2\":\"subvalue2\"},\"key4\":\"val3\"}";

Map<String, Object> map = new Gson().fromJson(jsonString, new TypeToken<Map<String, Object>>() {
}.getType());

The above example works with GSON 2.2.2. And sysout(map) produces

{key1=val1, key2=val2, key3={subkey1=subvalue1, subkey2=subvalue2}, key4=val3}

As a small improvement I'd suggest that you explicitly specify map type parameters, and use Map instead of HashMap for the TypeToken.