java - Access string from key value json response -

i'm getting simple json response , can't access value easily. response this

{"email":"ted@ted.com"} 

that's after doing json.tostring(). i'm trying access value of email , keep getting errors. thought

json.getstring("email") 

also in java.

edit: here errors i'm getting

07-22 06:45:11.524: e/androidruntime(9977): fatal exception: asynctask #2 07-22 06:45:11.524: e/androidruntime(9977): java.lang.runtimeexception: error occured while executing doinbackground() 07-22 06:45:11.524: e/androidruntime(9977):     @ android.os.asynctask$3.done(asynctask.java:299) 07-22 06:45:11.524: e/androidruntime(9977):     @ java.util.concurrent.futuretask$sync.innersetexception(futuretask.java:273) 07-22 06:45:11.524: e/androidruntime(9977):     @ java.util.concurrent.futuretask.setexception(futuretask.java:124) 07-22 06:45:11.524: e/androidruntime(9977):     @ java.util.concurrent.futuretask$sync.innerrun(futuretask.java:307) 07-22 06:45:11.524: e/androidruntime(9977):     @ java.util.concurrent.futuretask.run(futuretask.java:137) 07-22 06:45:11.524: e/androidruntime(9977):     @ android.os.asynctask$serialexecutor$1.run(asynctask.java:230) 07-22 06:45:11.524: e/androidruntime(9977):     @ java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1076) 07-22 06:45:11.524: e/androidruntime(9977):     @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:569) 07-22 06:45:11.524: e/androidruntime(9977):     @ java.lang.thread.run(thread.java:856) 07-22 06:45:11.524: e/androidruntime(9977): caused by: android.view.viewrootimpl$calledfromwrongthreadexception: original thread created view hierarchy can touch views. 07-22 06:45:11.524: e/androidruntime(9977):     @ android.view.viewrootimpl.checkthread(viewrootimpl.java:4609) 07-22 06:45:11.524: e/androidruntime(9977):     @ android.view.viewrootimpl.invalidatechildinparent(viewrootimpl.java:867) 07-22 06:45:11.524: e/androidruntime(9977):     @ android.view.viewgroup.invalidatechild(viewgroup.java:4066) 07-22 06:45:11.524: e/androidruntime(9977):     @ android.view.view.invalidate(view.java:10193) 07-22 06:45:11.524: e/androidruntime(9977):     @ android.widget.textview.invalidateregion(textview.java:4375) 07-22 06:45:11.524: e/androidruntime(9977):     @ android.widget.textview.invalidatecursor(textview.java:4318) 07-22 06:45:11.524: e/androidruntime(9977):     @ android.widget.textview.spanchange(textview.java:7172) 07-22 06:45:11.524: e/androidruntime(9977):     @ android.widget.textview$changewatcher.onspanadded(textview.java:8759) 07-22 06:45:11.524: e/androidruntime(9977):     @ android.text.spannablestringbuilder.sendspanadded(spannablestringbuilder.java:979) 07-22 06:45:11.524: e/androidruntime(9977):     @ android.text.spannablestringbuilder.setspan(spannablestringbuilder.java:688) 07-22 06:45:11.524: e/androidruntime(9977):     @ android.text.spannablestringbuilder.setspan(spannablestringbuilder.java:588) 07-22 06:45:11.524: e/androidruntime(9977):     @ android.text.selection.setselection(selection.java:76) 07-22 06:45:11.524: e/androidruntime(9977):     @ android.text.selection.setselection(selection.java:87) 07-22 06:45:11.524: e/androidruntime(9977):     @ android.text.method.arrowkeymovementmethod.initialize(arrowkeymovementmethod.java:302) 07-22 06:45:11.524: e/androidruntime(9977):     @ android.widget.textview.settext(textview.java:3535) 07-22 06:45:11.524: e/androidruntime(9977):     @ android.widget.textview.settext(textview.java:3405) 07-22 06:45:11.524: e/androidruntime(9977):     @ android.widget.edittext.settext(edittext.java:80) 07-22 06:45:11.524: e/androidruntime(9977):     @ android.widget.textview.settext(textview.java:3380) 07-22 06:45:11.524: e/androidruntime(9977):     @ com.reflap.reflap.editprofile$fillfields.doinbackground(editprofile.java:61) 07-22 06:45:11.524: e/androidruntime(9977):     @ com.reflap.reflap.editprofile$fillfields.doinbackground(editprofile.java:1) 07-22 06:45:11.524: e/androidruntime(9977):     @ android.os.asynctask$2.call(asynctask.java:287) 07-22 06:45:11.524: e/androidruntime(9977):     @ java.util.concurrent.futuretask$sync.innerrun(futuretask.java:305) 07-22 06:45:11.524: e/androidruntime(9977):     ... 5 more 

i'm doing in background process.

i believe stack trace not caused parsing of json data, fact asynctask referencing ui (some textview) in doinbackground method.

you reference views onpostexecute, possibly through weakreference s.