Reading Data From Json And Saving It In Android App Using Ormlite

I am new in doing work with android database. My question is, I have a json data which i want to parse it in my android application. Specifically i want to take that data and save

Solution 1:

I would utilize the GSON library which is super helpful for handling JSON

https://code.google.com/p/google-gson/

Then you need to create a java class with all of the data that the JSON has that you want to parse.

If your JSON looked like this:

{
"id":4854
"name":"Charlie"
"age":35
"eye_color":"blue"
}

Then you would want to create a class matching that data. THIS IS CASE SENSITIVE.

public class Data implements Serializable {
        private int id;
        private String name;
        private int age;
        private String eye_color;
    }

    public class Item implements Serializable{
}

Now you can create a java object from the JSON:

Gson gson = new Gson();
Data data = gson.fromJson(yourJsonHere, Data.class)

and boom! your data object is now what your JSON was.

Solution 2:

Ok, I don't use ORMLITE, I'm using GreenDao as ORM but I guess it's the same thing. For parsing a JSON there is some libraries that help, I always try to use GSON that is a library that handle serialization between objects and JSON data. There is a lot of documentation about GSON on the web and plenty of examples. Search for it. I recommend use that approach, for me is the better. Also you can parse a JSON with the org.json.JSON library. This one is more "by hand" parser but could be pretty useful. For example:

for the following JSON:

{
    "name": "MyName",
    "age": 24
}

that you want to map into a object Person that is a class from your data model generated by ORMLITE:

public class Person {
    private String name;
    private int age;

    public void setName(String name) {
        this.name = name;
    }

    public void setAge(int age) {
        this.age = age;
    }
}

You could do something like:

Person myPerson = new Person();
//This is the use of the org.json.JSON library
JSONObject jObject = new JSONObject(myJSONString);
myPerson.setName(jObject.getString("name"));
myPerson.setAge(jObject.getInt("age"));

And that's a way. Of course JSON library has many function and types to help you with JSON data. Check it out.

But all that code with GSON will be reduced to:

Gson gson = new GsonBuilder().create();
Person myPerson = gson.fromJson(myJSONString, Person.class);

So again try using GSON, it's the best way. Hope it helps