CODEWITHSUNDEEP
androidjson
Steve Kamau
Steve Kamau

Reputation: 2785

How to search in JSON and return search results in activity

I am parsing a JSON in my activity to display both text and images in a gridView.However i would like to try to add search functionality on this JSON and display the results on the activity.

For example consider a JSON script on an online server like this:

[
    {
        "title": "Ongata Rongai",
        "image": "http://snapt.t15.org/melanie/real_estates/images/house1.jpg",
        "rating": 5 500 000,
        "releaseYear": 2014,
        "genre": ["Spacious open lounge and kitchen"]
    },
	{
        "title": "Kisumu",
        "image": "http://snapt.t15.org/melanie/real_estates/images/house2.jpg",
        "rating": 1 700 000,
        "releaseYear": 2014,
        "genre": ["high end townhouse."]
    },
	{
        "title": "Mombasa",
        "image": "http://snapt.t15.org/melanie/real_estates/images/house3.jpg",
        "rating": 68 000,
        "releaseYear": 2014,
        "genre": ["Its fully fitted kitchedn pantry with a beautyful backyard."]
    }
  ]

I would like to implement search of title like Kisumu and the result to be displayed will be from this part only so that i parse this alone:

[
	{
        "title": "Kisumu",
        "image": "http://snapt.t15.org/melanie/real_estates/images/house2.jpg",
        "rating": 1 700 000,
        "releaseYear": 2014,
        "genre": ["high end townhouse."]
    }
  ]

Is there a way of achieving the above?

I am open to ideas and suggestions and any help will be appreciated.

Upvotes: 2

Views: 891

Answers (2)

Ali Gh
Ali Gh

Reputation: 700

this method give resualt of server and title as you want and returns search result as JSONObject 

private JSONObject SearchMethod(String result,String Key)
{

//result is your server response 
//Key is Kisumu 
JSONArray json = new JSONArray(result);

    for(int i=0;i<json.length();i++){                        
        JSONObject e = json.getJSONObject(i);
        if(e.c.getString("title").contains(Key))
            return e ;     
        }
    return null;
}

Upvotes: 0

Viswanath Lekshmanan
Viswanath Lekshmanan

Reputation: 10083

You can't search json directly. Convert the json to List Java classes. Then use Java API like Predicate to find necessary java class that satisfy your condition. For eg: Title as Kusumu as you asked.

Which will limit the list of classes to one that satisfy the condition. Then convert the java class back to json if you need Json.

Note: You can use GSON for easy class <-> json conversion

UPDATE

For converting Json to Java classes

List<ModelClass> models = new Gson().fromJson(yourJsonString, ModelClass.java);

Then using predicate 

public static Predicate<ModelClass> isHavingTitle() {
    return p -> p.getTitle().contains("Kusumu");
}

In Java 8 predicate filtering can be done like below in other case you can just google it. This is a sample 

public static List<ModelClass> filterEmployees (List< ModelClass > models, Predicate< ModelClass > predicate) {
    return models.stream().filter( predicate ).collect(Collectors.<ModelClass>toList());
}

I didn't compile any of this :)

String filteredJson = new Gson().toJson(models);

Upvotes: 2

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