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POAndroid: Parsing large JSON file
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  1. POAndroid: Parsing large JSON file
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    copied!<p>I'm creating an android application which should parse a Json from a file or url to a jsonarray and jsonobjects. The problem is that my json is 3.3 mb and when i use a simple code, something like this: (can't acces my real code now because im at work, copied some code from tutorial; so there might be some errors in it)</p> <p>(assuming i already have my inputstream content)</p> <pre><code>InputStream content = entity.getContent(); BufferedReader reader = new BufferedReader(new InputStreamReader(content)); String line; while ((line = reader.readLine()) != null) { builder.append(line); String twitterfeed = builder.toString(); } JSONArray jsonArray = new JSONArray(twittefeed); Log.i(ParseJSON.class.getName(), "Number of entries " + jsonArray.length()); for (int i = 0; i &lt; jsonArray.length(); i++) { JSONObject jsonObject = jsonArray.getJSONObject(i); Log.i(ParseJSON.class.getName(), jsonObject.getString("text")); </code></pre> <p>When i run this code on my android device, i get an OutOfMemory error when parsing the string to the jsonArray. I logged some things i found that my total string is 17 mb (of a 3.3 mb json file?!) When i use a small json file, like a twitterfeed or so, the code works fine. When i got this 17 mb string in my memory i can't parse the json, because then i run out of memory.</p> <p>After a lot of research i found that jackson might be my solution, because i understood that it is possible to parse an inputstream. This should help, because than i don't need the 17 mb string in my memory; and this is not the most efficient way i gues.... But i can't get it clear of this really will work, and didn't get it running myself. Does anyone know of this is really will work, and where i can find a tutorial?</p> <p>I found the <a href="http://fasterxml.github.com/jackson-core/javadoc/2.0.0/index.html?com/fasterxml/jackson/core/JsonFactory.html" rel="nofollow">"createJsonParser -- public JsonParser createJsonParser(InputStream in)"</a> and think this is my way to go... but i don't know how to implement this in my code, and can't find an example. Does anyone know how this works?</p>
 

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