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


exception stack trace:

java.lang.runtimeexception: error occured while executing doinbackground() e/androidruntime( 695): @ android.os.asynctask$3.done(asynctask.java:200) e/androidruntime( 695): @ java.util.concurrent.futuretask$sync.innersetexception(futuretask.java:273) e/androidruntime( 695): @ java.util.concurrent.futuretask.setexception(futuretask.java:124) e/androidruntime( 695): @ java.util.concurrent.futuretask$sync.innerrun(futuretask.java:307) e/androidruntime( 695): @ java.util.concurrent.futuretask.run(futuretask.java:137) e/androidruntime( 695): @ java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1068) e/androidruntime( 695): @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:561) e/androidruntime( 695): @ java.lang.thread.run(thread.java:1096) e/androidruntime( 695): caused by: java.lang.noclassdeffounderror: com.google.gson.gson e/androidruntime( 695): @ com.amphisoft.mebox.loginactivity$logintask.doinbackground(loginactivity.java:167) e/androidruntime( 695): @ com.amphisoft.mebox.loginactivity$logintask.doinbackground(loginactivity.java:1) e/androidruntime( 695): @ android.os.asynctask$2.call(asynctask.java:185) e/androidruntime( 695): @ java.util.concurrent.futuretask$sync.innerrun(futuretask.java:305) e/androidruntime( 695): ... 4 more

this 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 library.. getting same error class definition not found.. please me. in advance..

create libs folder , put gson in there, add folder library path.

see this


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