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Android How to Deserialize the Json String Using Pojo Class

I Am getting this Json Response from server how to deseriallize the json string
{
"results": {
"status": "true",
"message": "Successfully Get Data",
"PdfData": {
"Pdf_Result": [{
"Pdf_File_Name": "aft.pdf",
"Subject_Name": "Maths",
"Subject_Id": "1",
"Chapter_ID": "M1111",
"Chapter_Name": "Relations and Functions",
"Downloaded": "YES"
}, {
"Pdf_File_Name": "date.pdf",
"Subject_Name": "Maths",
"Subject_Id": "1",
"Chapter_ID": "M1112",
"Chapter_Name": "Algebra",
"Downloaded": "YES"
}]
}
}
}

see jsonschema2pojo.org site and Gson library tutorial

https://www.javacodegeeks.com/2011/01/android-json-parsing-gson-tutorial.html
This tutorials will teach you how to parse with Json using Gson

Deserializing different objects in JSON array (GSON)

The JSON result for getUsers I get from the server looks like this:
{
"result": [
{
"meta": {
"rows": "3"
}
},
{
"items": [
{
"id": "1",
"name": "Steve",
"age": "30"
},
{
"id": "2",
"name": "Mary",
"age": "29"
},
{
"id": "3",
"name": "Bill",
"age": "58"
}
]
}
]
}
How can I deserialize it by GSON in my android app (I'm using retrofit)?
I can't imagine any wrapper classes because of the different object types in result.
Any help would be appreciated!

For good example
Converting JSON to Java
Other way, you can convert your json to a java object
Please use org.json library http://www.json.org/java/index.html
Then, for example
json = new JSONObject(YOUR_JSON).getJSONObject("result");
JSONArray items = data.getJSONArray("items");
String name = items.getJSONObject(0).getString("name");

You can write a TypeAdapter for a type that will be (de)serialized to(from) array. You can even make it generic, so it will work with type like Pair<A, B>. Here is an example for non-generic type: https://github.com/cakoose/json-tuple-databinding-examples/blob/master/java/src/GsonEntryCustomizer.java — it (de)serializes Entry to(from array).
Disclaimer — I have not written nor tested that code, but it seems legit.
If you only encounter such problem once (like in your example), you may not bother making it generic, just write TypeAdapter for your specific pair of 2 different classes. The reading code is quite straightforward:
in.beginArray();
SomeClass1 info1 = gson.getAdapter(SomeClass1.class).read(in);
SomeClass2 info2 = gson.getAdapter(SomeClass2.class).read(in);
in.endArray();
return new SomeContainerClass(info1, info2);
(see https://github.com/cakoose/json-tuple-databinding-examples/blob/master/java/src/GsonEntryCustomizer.java#L52)

How to parse multiple nested JSON objects/arrays with GSON?

I have been trying to wrap my head around how to parse nested objects and arrays with GSON, still stuck. How can I parse the nested items listed in the "results" array?
{
"item": {
"results": [
{
"__metadata": {
"url": "google.com",
"type": "website"
},
"listed": true,
"market": 225,
"town": "Toronto"
},
{
"__metadata": {
"url": "twitter.com",
"type": "website"
},
"listed": true,
"market": 225,
"town": "Calgary"
}
]
}
}
How can I easily do this with GSON within Android?
Thank you!

Android Studio
Download Plugin "GsonFormat"
Create your model class
Open Code->Generate->Gson
Paste your json click ok - if json is valid then it will convert the following json to java class (pojo)
Now create Gson object
Gson gson=new Gson();
Convert Json to java object
T obj = gson.fromJson(contents, tClass);
Now use this object "obj" to get values

JSON parsing of array that contain object and string both

I am getting gson error when I parse following json. If anybody have some idea how can i parse this json then please tell me.
{
"video": [
"",
"",
"",
{
"date": "25-sep-2014",
"day": "monday",
"city": "chandigarh"
}
] }

You can using gson library, it's easiest way Using Gson to parse json object

Gson ignore json field and deserialize

I'm working with android and gson and i was wondering if i can ignore a field from the webservice.
this its my gson object
Gson gson = new GsonBuilder().serializeNulls().create();
So what i need is to ignore validator field and deserialize to my custom bean in the following code.
Its any way to do that with gson ?
{ "posts":
[
{
"username": "John",
"message": "I'm back",
"time": "2010-5-6 7:00:34"
"validator":[{
"prog": "Name1",
"name": "Name2",
"computername": "Name3",
"date": "2010-11-20 19:39:55"
}]
}
,
{
"username": "Smith",
"message": "I've been waiting",
"time": "2010-4-6 10:30:26"
"validator":[{
"prog": "Name1",
"name": "Name2",
"computername": "Name3",
"date": "2010-11-20 19:39:55"
}]
}
]}
Thanks in advance
Cheers

You can call gson.fromJson(inputString, localObject) and if localObject doesn't declare a validator variable, it will just skip it.