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POjava.lang.RuntimeException: An error occured while executing doInBackground()
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  1. POjava.lang.RuntimeException: An error occured while executing doInBackground()
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    copied!<p>Exception stack trace:</p> <blockquote> <p>java.lang.RuntimeException: An error occured while executing doInBackground() E/AndroidRuntime( 695): at android.os.AsyncTask$3.done(AsyncTask.java:200) E/AndroidRuntime( 695): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273) E/AndroidRuntime( 695): at java.util.concurrent.FutureTask.setException(FutureTask.java:124) E/AndroidRuntime( 695): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307) E/AndroidRuntime( 695): at java.util.concurrent.FutureTask.run(FutureTask.java:137) E/AndroidRuntime( 695): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068) E/AndroidRuntime( 695): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561) E/AndroidRuntime( 695): at java.lang.Thread.run(Thread.java:1096) E/AndroidRuntime( 695): Caused by: java.lang.NoClassDefFoundError: com.google.gson.Gson E/AndroidRuntime( 695): at com.amphisoft.mebox.LoginActivity$LoginTask.doInBackground(LoginActivity.java:167) E/AndroidRuntime( 695): at com.amphisoft.mebox.LoginActivity$LoginTask.doInBackground(LoginActivity.java:1) E/AndroidRuntime( 695): at android.os.AsyncTask$2.call(AsyncTask.java:185) E/AndroidRuntime( 695): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305) E/AndroidRuntime( 695): ... 4 more</p> </blockquote> <p>This is my code:</p> <pre><code>protected User doInBackground(User... user) { HttpClient httpClient = new DefaultHttpClient(); try { HashMap&lt;String, String&gt; parameters = new HashMap&lt;String, String&gt;(); parameters.put("username", user[0].username); parameters.put("password", user[0].password); String response = HTTPUtil.post("/user/login.json", parameters, null); System.out.println("Response:" + response); Gson gson = new Gson(); User userObj = gson.fromJson(response, User.class); Store.getInstance().user = userObj; } </code></pre> <p>I tried adding gson-2.1jar many times in the library.. But getting the same error as class definition not found.. Please help me. Thanks in advance..</p>
 

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