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Json Parsing and Nullable int value in android

I have a json object as I showed in two cases: -

Case 1:

     {

                 OWNER_ID : 145
     }

Case 2:

     {

                  OWNER_ID : null
     }

Now, to parse the data, I use the following statement:

int note_owner_id = jsonObject.getInt("OWNER_ID");

I am aware of that in java we need to use a wrapper class to extract a NULL integer and the code should be written like this: -

Integer note_owner_id = jsonObject.getInt("OWNER_ID");

But still I cannot successfully parse the data. Can anyone help me? How to parse an int value at all so that it doesn't show an Exception?

Thanks in advance.

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5 answers


Try this way, hope it helps you solve your problem.

Instead of getInt (string name) try using optInt (String name) or optInt (string name, int fallBack) , which will handle a null value:

jsonObject.optInt("OWNER_ID");


Or

jsonObject.optInt("OWNER_ID", 0);
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You can install Integer

with ternary andisNull(String) 



Integer note_owner_id = (jsonObject.isNull("OWNER_ID")) ? null :
     jsonObject.getInt("OWNER_ID");
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you can use optInt

public int optInt (row name)

Returns the value displayed by name if it exists and is an int, or can be coerced into an int, or 0 otherwise.

to handle null values ​​like

jsonObject.optInt("OWNER_ID");

or

jsonObject.optInt("OWNER_ID", defaultValue);
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just add below line to check if your variable is null or not: -

if(jsonObject.isNULL("OWNER_ID"))
{
    // code here when data is null
}
else
{
    int note_owner_id = jsonObject.getInt("OWNER_ID");
}
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You can use "Opt" for Json when it is Nullable and it's easy. Instead of getInt or getString, use:

int anything= json.optInt( "any", 0 );
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