android - Using IMEI as a parameter for JSON Service -

after grasping asynctask, have run yet road bump. using json (which connects local sqlserver, retrieve object using imei string parameter. have set breakpoint asynctask call , crashes, without walking through. imei of each mobile stored in database.

i implementing following asynctask hope of running on device, , not on emulator.

i suspect may have device, both web services running on pc. have changed proxy , port in apn settings coincide uri of service still doesn't respond.

telephonymanager telephonymanager = (telephonymanager) this.getsystemservice(context.telephony_service);         imei = telephonymanager.getdeviceid();         new loaddevice().execute(imei); 

this code snippet oncreate method.

here asynctask class:

//asynctask load manifestid device     public class loaddevice extends asynctask<string, string, manifests>     {         private progressdialog progressdialog = new progressdialog(mainactivity.this);         inputstream inputstream = null;         string thestring = "";         stringbuilder builder;          protected void onpreexecute()         {             progressdialog.setmessage("getting assigned manifest...");             progressdialog.show();             progressdialog.setoncancellistener(new oncancellistener()             {                 public void oncancel(dialoginterface arg0)                 {                     loaddevice.this.cancel(true);                 }             });         }          @override         protected manifests doinbackground(string... arg0)         {             try             {                 //http request                 httpget request = new httpget(centraluri + "/loaddevice/" + imei);                 //set hedear data in json format                 request.setheader("accept", "application/json");                 request.setheader("content-type", "application/json");                  defaulthttpclient client = new defaulthttpclient();                  //get response                 httpresponse response = client.execute(request);                 httpentity entity = response.getentity();                  //read content                 inputstream = entity.getcontent();                 bufferedreader reader = new bufferedreader(new inputstreamreader(is));                  builder = new stringbuilder();                 string line;                 while ((line = reader.readline()) != null)                 {                     builder.append(line);                 }                 is.close();                  thestring = builder.tostring();                  jsonobject manifestjson = new jsonobject(thestring);                 jsonarray manifest = manifestjson.getjsonarray("loaddeviceresult");                  for(int = 1; < manifest.length(); i++)                 {                     jsonobject manobj = manifest.getjsonobject(i);                     man.manifestid = manobj.getint("originalsogmanifestid");                     man.devicemanifestid = manobj.getint("devicemanifestid");                     man.imei = manobj.getstring("imei");                     man.jobtype = manobj.getstring("prefix");                     man.regno = manobj.getstring("regno");                     man.complete = manobj.getboolean("complete");                     man.datecomplete = manobj.getstring("datecomplete");                 }             }             catch (exception e)             {                 e.printstacktrace();             }             return man;         }          protected void onpostexecute(manifests manifest)         {             //manifests manifesttoget = new manifests();             //string manifestcode = manifesttoget.getjobtype() + integer.tostring(manifesttoget.getmanifestid());             //new getmanifestitems().execute(manifestcode);         }      } 

my other asynctasks working fine. however, after put beast in first asynctask run, others not getting hit.

here asynctask relies on property in object retrieved first asynctask:-

//asynctask manifestitem each manifest     public class getmanifestitems extends asynctask<string, string, arraylist<manifestitemobj>>     {         private progressdialog progressdialog = new progressdialog(mainactivity.this);         inputstream inputstream = null;         string thestring = "";         stringbuilder builder;          protected void onpreexecute()         {             progressdialog.setmessage("loading manifests...");             progressdialog.show();             progressdialog.setoncancellistener(new oncancellistener()             {                 public void oncancel(dialoginterface arg0)                 {                     getmanifestitems.this.cancel(true);                 }             });         }          @override         protected arraylist<manifestitemobj> doinbackground(string... params)         {             manifests assign = man;             string manifestcode = assign.getjobtype() + integer.tostring(assign.getmanifestid());              try             {                 //http request                 httpget request = new httpget(pod_uri + "/getjobs/" +  manifestcode);                 //set hedear data in json format                 request.setheader("accept", "application/json");                 request.setheader("content-type", "application/json");                  defaulthttpclient client = new defaulthttpclient();                  //get response                 httpresponse response = client.execute(request);                 httpentity entity = response.getentity();                  //read content                 inputstream = entity.getcontent();                 bufferedreader reader = new bufferedreader(new inputstreamreader(is));                  builder = new stringbuilder();                 string line;                 while ((line = reader.readline()) != null) {                                 builder.append(line);                         }                 is.close();                  thestring = builder.tostring();                  jsonobject jobsjson = new jsonobject(thestring);                  jsonarray jobs = jobsjson.getjsonarray("getjobsresult");                 manifestitemobj midumb = new manifestitemobj();                 midumb.manifestitemid = -1;                 midumb.fkid = -1;                 midumb.jobtype = "--please select--";                  for(int = 1; < jobs.length(); i++)                 {                     jsonobject mit = jobs.getjsonobject(i);                     manifestitemobj mi = new manifestitemobj();                     mi.manifestitemid = mit.getint("manifestitemid");                     mi.jobtype = mit.getstring("jobtype");                     mi.fkid = mit.getint("fkid");                      //shipto object                     jsonobject stobj = mit.getjsonobject("shipto");                      shipto sto = new shipto();                     sto.shiptoid = stobj.getint("shiptoid");                     sto.shiptoname = stobj.getstring("shiptoname");                     sto.shiptoaddress1 = stobj.getstring("shiptoaddress1");                     sto.shiptoaddress2 = stobj.getstring("shiptoaddress2");                     sto.shiptocity = stobj.getstring("shiptocity");                     sto.shiptopostcode = stobj.getstring("shiptopcode");                     sto.shiptostate = stobj.getstring("shiptostate");                     mi.shipto = sto;                      joblist.add(mi);                 }                 joblist.add(0, midumb);             }             catch (exception e)             {                 e.printstacktrace();             }             return joblist;         }          protected void onpostexecute(arraylist<manifestitemobj> mio)         {             manifestitemadapter mia = new manifestitemadapter(mainactivity.this, android.r.layout.simple_spinner_item, joblist);             this.progressdialog.dismiss();             list_job.setadapter(mia);          }     } 

edit: here logcat. i'm suspecting button being cast spinner. not intention that's it's saying:-

05-03 14:20:20.603: e/trace(797): error opening trace file: no such file or directory (2) 05-03 14:20:21.204: d/androidruntime(797): shutting down vm 05-03 14:20:21.204: w/dalvikvm(797): threadid=1: thread exiting uncaught exception (group=0x40a13300) 05-03 14:20:21.224: e/androidruntime(797): fatal exception: main 05-03 14:20:21.224: e/androidruntime(797): java.lang.runtimeexception: unable start activity componentinfo{com.signonglass/com.signonglass.mainactivity}: java.lang.classcastexception: android.widget.button cannot cast android.widget.spinner 05-03 14:20:21.224: e/androidruntime(797):  @ android.app.activitythread.performlaunchactivity(activitythread.java:2059) 05-03 14:20:21.224: e/androidruntime(797):  @ android.app.activitythread.handlelaunchactivity(activitythread.java:2084) 05-03 14:20:21.224: e/androidruntime(797):  @ android.app.activitythread.access$600(activitythread.java:130) 05-03 14:20:21.224: e/androidruntime(797):  @ android.app.activitythread$h.handlemessage(activitythread.java:1195) 05-03 14:20:21.224: e/androidruntime(797):  @ android.os.handler.dispatchmessage(handler.java:99) 05-03 14:20:21.224: e/androidruntime(797):  @ android.os.looper.loop(looper.java:137) 05-03 14:20:21.224: e/androidruntime(797):  @ android.app.activitythread.main(activitythread.java:4745) 05-03 14:20:21.224: e/androidruntime(797):  @ java.lang.reflect.method.invokenative(native method) 05-03 14:20:21.224: e/androidruntime(797):  @ java.lang.reflect.method.invoke(method.java:511) 05-03 14:20:21.224: e/androidruntime(797):  @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:786) 05-03 14:20:21.224: e/androidruntime(797):  @ com.android.internal.os.zygoteinit.main(zygoteinit.java:553) 05-03 14:20:21.224: e/androidruntime(797):  @ dalvik.system.nativestart.main(native method) 05-03 14:20:21.224: e/androidruntime(797): caused by: java.lang.classcastexception: android.widget.button cannot cast android.widget.spinner 05-03 14:20:21.224: e/androidruntime(797):  @ com.signonglass.mainactivity.oncreate(mainactivity.java:55) 05-03 14:20:21.224: e/androidruntime(797):  @ android.app.activity.performcreate(activity.java:5008) 05-03 14:20:21.224: e/androidruntime(797):  @ android.app.instrumentation.callactivityoncreate(instrumentation.java:1079) 05-03 14:20:21.224: e/androidruntime(797):  @ android.app.activitythread.performlaunchactivity(activitythread.java:2023) 05-03 14:20:21.224: e/androidruntime(797):  ... 11 more 

could 1 of these 2 things:

1. add permission manifest < uses-permission android:name="android.permission.read_phone_state"> (remove space after '<')
2. you declaring button in layout file of mainactivity cast spinner while initiating button or vice-versa.