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Editorial Team
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Asked: 2026-06-11T13:52:57+00:00

I would like to validate one string fetched as a response from a server.

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I would like to validate one string fetched as a response from a server. The response must be a valid JSON string. Sometimes, when the user is over a network that requires authentication or a PHP error happens, the response isn’t a valid JSON.

Android parser JSONTokener don’t validates strings before parsing them, so under that cases the application throws a JSONException and force closes.

I catched the exception, but application is still closing.

My question is: Is there any JSON validator for objects and strings to validate them first and avoid parsing them if they have an invalid format?

Another solution is checking if string[0] has “{” or “[” but this solution isn’t elegant and will miss a lot of errors. So I would like to use a full JSON validator.

Thanks in advance.

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1 Answer

  1. Editorial Team

    Are you using GSON?

    If so the library raises a JsonSyntaxException when parsing a malformed JSON string

    If you are using android.util.JsonReader a MalformedJsonException is thrown by the JsonReader

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