check for an url in json string

Question

I have below json stored in sharedPref as a single line string

[
   {
      "url":"http:\/\/google.com",
      "feedType":"Automotive"
   },
   {
      "url":"http:\/\/google.com",
      "feedType":"Automotive"
   }
]

I am checking that url is already present in json string using below code but its not working since json is escaped with \ backslash.

String url = "http://google.com";
String jsonString = '[{"url":"http:\/\/google.com","feedType":"Automotive"},{"url":"http:\/\/google.com","feedType":"Automotive"}]';

if(jsonString.contains(url)) {
      Toast.makeText(context, "URL already exists.", Toast.LENGTH_LONG).show();
      return false;
}

Please help how can i check that url is already exist in string to avoid dupes.

Jonas Czech · Accepted Answer · 2015-03-29 08:49:25Z

1

This will ignore the backslashes when comparing the Strings:

String url = "http://google.com";
String jsonString = //get it from SharedPreferences

if(jsonString.replace("\\", "").contains(url)) {
      Toast.makeText(context, "URL already exists.", Toast.LENGTH_LONG).show();
}

Note the use of replace("\\", "").

edited Mar 29, 2015 at 8:49

answered Mar 29, 2015 at 8:42

Jonas Czech

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Comments

ar4ers · Accepted Answer · 2015-03-29 08:56:34Z

0

I've got 2 solution in mind.

First, the hard one, is to remove escape characters by deserializing your json string into objects and then compare url.

Second one is to remove escape characters by yourself.

answered Mar 29, 2015 at 8:56

ar4ers

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2 Comments

Saqueib Over a year ago

ya as @JohnasCz said, I think first one is good for simplicity, it will be overkill to go an loop every object and check the it has the url :)

ar4ers Over a year ago

Choose that suits best to your app :)

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