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POJsonReader Exception in Android while parsing large JSON data
 

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    <p>I am getting an exception when using the <code>JsonReader</code> class in android while parsing a large json data.</p> <p>Exception:</p> <pre><code>java.lang.IllegalStateException: Expected a name but was STRING </code></pre> <p>The json data is valid but I can't find out the reason for this exception!</p> <p>Thanks a lot!</p> <p>My Code :</p> <pre><code> public void readJsonStream(InputStream in) throws IOException { JsonReader reader = new JsonReader(new InputStreamReader(in)); reader.setLenient(true); try { readJsonObject(reader); } catch (Exception e) { System.out.println(e); } finally { reader.close(); } } // Read Json From JsonReader Class public void readJsonObject(JsonReader reader) throws IOException { reader.beginObject(); while (reader.hasNext()) { String name = reader.nextName(); System.out.println(name.equals("result")); if (name.equals("result")) { reader.beginObject(); while (reader.hasNext()) { String josnParser = reader.nextName(); if (josnParser.equals(optionmaster)) { // Optionmaster reader.beginArray(); while (reader.hasNext()) { readJsonArray(reader); } reader.endArray(); } else { reader.skipValue(); } } reader.endObject(); } else { reader.skipValue(); } } reader.endObject(); } public void readJsonArray(JsonReader reader) throws IOException { reader.beginObject(); while (reader.hasNext()) { String name = reader.nextName(); System.out.println(name); // Here is My Exception .... if (name.equals("om_id")&amp;&amp; reader.peek() != JsonToken.NULL) { String om_id = reader.nextString(); } else if (name.equals("om_multiselect")&amp;&amp; reader.peek() != JsonToken.NULL) { String om_multiselect = reader.nextString(); } else if (name.equals("omlang_name")&amp;&amp; reader.peek() != JsonToken.NULL) { String omlang_name = reader.nextString(); } else if (name.equals("om_createdDate")&amp;&amp; reader.peek() != JsonToken.NULL) { String om_createdDate = reader.nextString(); } else { reader.skipValue(); } } reader.endObject(); } </code></pre> <p>And here's the JSON data:</p> <pre><code> { "result": { "options": [ { "opt_id": "8", "opt_om_id": "3", "optlang_name": "test1" }, { "opt_id": "9", "opt_om_id": "3", "optlang_name": "test" } ], "optionmaster": [ { "om_id": "2", "om_multiselect": "N", "omlang_name": "Style", "om_createdDate": "2012-08-25 01:37:57" }, { "om_id": "3", "om_multiselect": "Y", "omlang_name": "TEst", "om_createdDate": "2012-08-25 01:37:57" } ] } } </code></pre> <p>Here is my sample code please review , i parsed options array successfully, the i couldn't parse optionmaster the error which appears when trying to parse "om_id"</p> <p>Logcat:</p> <pre><code> 05-21 17:39:54.833: W/System.err(1116): java.lang.IllegalStateException: Expected a name but was STRING 05-21 17:39:54.833: W/System.err(1116): at android.util.JsonReader.nextName(JsonReader.java:390) 05-21 17:39:54.843: W/System.err(1116): at com.test.JsonParser.readJsonArray(JsonParser.java:174) 05-21 17:39:54.843: W/System.err(1116): at com.test.JsonParser.readJsonObject(JsonParser.java:135) 05-21 17:39:54.843: W/System.err(1116): at com.test.JsonParser.readJsonStream(JsonParser.java:49) 05-21 17:39:54.843: W/System.err(1116): at com.test.ItemListActivity$ApiSyncController.doInBackground(ItemListActivity.java:149) 05-21 17:39:54.853: W/System.err(1116): at com.test.ItemListActivity$ApiSyncController.doInBackground(ItemListActivity.java:1) 05-21 17:39:54.853: W/System.err(1116): at android.os.AsyncTask$2.call(AsyncTask.java:287) 05-21 17:39:54.853: W/System.err(1116): at java.util.concurrent.FutureTask.run(FutureTask.java:234) 05-21 17:39:54.863: W/System.err(1116): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230) 05-21 17:39:54.863: W/System.err(1116): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080) 05-21 17:39:54.863: W/System.err(1116): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573) 05-21 17:39:54.863: W/System.err(1116): at java.lang.Thread.run(Thread.java:856)........ </code></pre>
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    1. COPlease post the stack trace and the relevant code snippet.
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    2. COjava.lang.IllegalStateException: Expected a name but was STRING 05-21 18:48:57.502: W/System.err(3631): at android.util.JsonReader.nextName(JsonReader.java:390) 05-21 18:48:57.502: W/System.err(3631): at com.tapendium.JsonParser.readJsonArray(JsonParser.java:299) 05-21 18:48:57.502: W/System.err(3631): at com.tapendium.JsonParser.readJsonObject(JsonParser.java:144) 05-21 18:48:57.512: W/System.err(3631): at
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    3. COThese are the stack trace log, i validated the josn using josnlint.com its a valid one and the exception i understand that the key is null but when i debug i can see the correct json in reader object ,
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