CODEWITHSUNDEEP
androidjson
prabu
prabu

Reputation: 727

How to recognize if json key value is unavailable?

JSON for Example:

{
"example_key1": {
    "one": 1,
    "two": 2,
    "three": 3
},
"example_key2": [
    {
        "four": 4,
        "five": 5,
        "six": 6
    }
]
}

Right now i am consuming one method from web service.That method is returning some JSON data like the above JSON example.

Here my problem is if some KEY values is missing from the JSON data, after consuming that method.(Say "example_key2" json value from the above json example is missing)

in the sense,

how can i recognize wether that key value is available or not?

Upvotes: 0

Views: 151

Answers (3)

keshav
keshav

Reputation: 3255

Use has method of JSONObject class

http://developer.android.com/reference/org/json/JSONObject.html#has(java.lang.String)

Returns true if this object has a mapping for name. The mapping may be NULL.

Upvotes: 1

Paresh Mayani
Paresh Mayani

Reputation: 128428

You can check whether particular key is available or not by using has() method

For example:

if(myJSONObject.has("one")) {
    num = myJSONObject.optString("one");
}

Upvotes: 1

Fahriyal Afif
Fahriyal Afif

Reputation: 558

JSONObject j = new JSONObject("");
j.has("example_key2");

Upvotes: 0

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