java.lang.RuntimeException: An error occured while executing doInBackground()

Question

Exception stack trace:

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

This is my code:

protected User doInBackground(User... user) {
        HttpClient httpClient = new DefaultHttpClient();
        try {
            HashMap<String, String> parameters = new HashMap<String, String>();
            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;

        }

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..

@user942821: Thanks for the comment, I will make sure from next time onwards i will put the logs and code properly. — Nishit
– Nishit, Commented Aug 7, 2012 at 8:10

Community · Accepted Answer · 2017-05-23 11:45:22Z

1

Create a libs folder and put gson in there, then add the folder to the library path.

See this

edited May 23, 2017 at 11:45

CommunityBot

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answered Jul 7, 2012 at 7:48

nullpotent

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1 Comment

Nishit Over a year ago

Sorry for replying late. I did that, it was working fine. Then i found that I was using network through proxy. So I had to set proxy in my emulator. Not its working fine. Thanks

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