java - Insert into database AsyncTask error -
i make android application on movies. have database movies. in application display movies in listview , add new movie. have problem when try insert in database new movie. indeed, have n error in asynctask in doinbackground don't know why. when use debugger, have reject on begin of doinbackground @ line : string title = etitle.gettext().tostring();
so give java code :
public class addmovie extends activity implements onclicklistener{ // edit , button user fill private edittext etitle, eactors, edirector, ekind, edate, eimage, esummary ; private button badd; // progress dialog private progressdialog pdialog; //json parser class //jsonparser jsonparser = new jsonparser(); private static final string tag_success = "success"; private static final string tag_message = "message"; @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_add_movie); etitle = (edittext)findviewbyid(r.id.title); eactors = (edittext)findviewbyid(r.id.actors); edirector = (edittext)findviewbyid(r.id.director); ekind = (edittext)findviewbyid(r.id.kind); edate = (edittext)findviewbyid(r.id.date); eimage = (edittext)findviewbyid(r.id.image); esummary = (edittext)findviewbyid(r.id.summary); badd = (button)findviewbyid(r.id.addmovies); badd.setonclicklistener(this); } public void onclick(view v) { // todo auto-generated method stub switch (v.getid()) { case r.id.addmovies: new attempmovie().execute(); // here have used, switch case, because on login activity may //also want show registration button, if user new ! can go //registration activity , other without switch //case. default: break; } } class attempmovie extends asynctask<string, string, string> { /** * before starting background thread show progress dialog * */ boolean failure = false; @override protected void onpreexecute() { super.onpreexecute(); pdialog = new progressdialog(addmovie.this); pdialog.setmessage("attempting add new movie..."); pdialog.setindeterminate(false); pdialog.setcancelable(true); pdialog.show(); } @override protected string doinbackground(string... args) { // todo auto-generated method stub // here check success tag int success; string title = etitle.gettext().tostring(); string actors = eactors.gettext().tostring(); string director = edirector.gettext().tostring(); string kind = ekind.gettext().tostring(); string date = edate.gettext().tostring(); string image = eimage.gettext().tostring(); string summary = esummary.gettext().tostring(); try { // building parameters list<namevaluepair> params = new arraylist<namevaluepair>(); params.add(new basicnamevaluepair("title", title)); params.add(new basicnamevaluepair("actors", actors)); params.add(new basicnamevaluepair("director", director)); params.add(new basicnamevaluepair("kind", kind)); params.add(new basicnamevaluepair("date", date)); params.add(new basicnamevaluepair("image", image)); params.add(new basicnamevaluepair("summary", summary)); log.d("request!", "starting"); jsonobject json = jsonfunctions.getjsonfromurl("http://10.0.0.35/bd_enterprise_mobility_movies/add_movie.php"); // checking log json response log.d("register attempt", json.tostring()); // success tag json success = json.getint(tag_success); if (success == 1) { log.d("successfully register!", json.tostring()); return json.getstring(tag_message); } else { log.d("login failure!", json.getstring(tag_message)); return json.getstring(tag_message); } } catch (jsonexception e) { e.printstacktrace(); } return null; } /** * once background process done need dismiss progress dialog asap * **/ protected void onpostexecute(string message) { pdialog.dismiss(); if (message != null){ intent = new intent(addmovie.this,mainactivity.class); finish(); // finish() method used tell android os done current //activity now! moving other activity startactivity(i); toast.maketext(addmovie.this, message, toast.length_long).show(); } } } } i give jsonfunctions.java
public class jsonfunctions { public static jsonobject getjsonfromurl(string url) { inputstream = null; string result = ""; jsonobject json = null; // download json data url try { httpclient httpclient = new defaulthttpclient(); httppost httppost = new httppost(url); httpresponse response = httpclient.execute(httppost); httpentity entity = response.getentity(); = entity.getcontent(); } catch (exception e) { log.e("log_tag", "error in http connection " + e.tostring()); } // convert response string try { bufferedreader reader = new bufferedreader(new inputstreamreader( is, "iso-8859-1"), 8); stringbuilder sb = new stringbuilder(); string line = null; while ((line = reader.readline()) != null) { sb.append(line + "\n"); } is.close(); result = sb.tostring(); } catch (exception e) { log.e("log_tag", "error converting result " + e.tostring()); } try { json = new jsonobject(result); } catch (jsonexception e) { log.e("log_tag", "error parsing data " + e.tostring()); } return json; } } and error in logcat:
03-20 18:28:19.753: e/androidruntime(14656): fatal exception: asynctask #3 03-20 18:28:19.753: e/androidruntime(14656): process: com.mickkoza.jsonkoza, pid: 14656 03-20 18:28:19.753: e/androidruntime(14656): java.lang.runtimeexception: error occured while executing doinbackground() 03-20 18:28:19.753: e/androidruntime(14656): @ android.os.asynctask$3.done(asynctask.java:300) 03-20 18:28:19.753: e/androidruntime(14656): @ java.util.concurrent.futuretask.finishcompletion(futuretask.java:355) 03-20 18:28:19.753: e/androidruntime(14656): @ java.util.concurrent.futuretask.setexception(futuretask.java:222) 03-20 18:28:19.753: e/androidruntime(14656): @ java.util.concurrent.futuretask.run(futuretask.java:242) 03-20 18:28:19.753: e/androidruntime(14656): @ android.os.asynctask$serialexecutor$1.run(asynctask.java:231) 03-20 18:28:19.753: e/androidruntime(14656): @ java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1112) 03-20 18:28:19.753: e/androidruntime(14656): @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:587) 03-20 18:28:19.753: e/androidruntime(14656): @ java.lang.thread.run(thread.java:818) 03-20 18:28:19.753: e/androidruntime(14656): caused by: java.lang.nullpointerexception: attempt invoke virtual method 'android.text.editable android.widget.edittext.gettext()' on null object reference 03-20 18:28:19.753: e/androidruntime(14656): @ com.mickkoza.jsonkoza.addmovie$attempmovie.doinbackground(addmovie.java:81) 03-20 18:28:19.753: e/androidruntime(14656): @ com.mickkoza.jsonkoza.addmovie$attempmovie.doinbackground(addmovie.java:1) 03-20 18:28:19.753: e/androidruntime(14656): @ android.os.asynctask$2.call(asynctask.java:288) 03-20 18:28:19.753: e/androidruntime(14656): @ java.util.concurrent.futuretask.run(futuretask.java:237) 03-20 18:28:19.753: e/androidruntime(14656): ... 4 more 03-20 18:28:20.184: e/windowmanager(14656): android.view.windowleaked: activity com.mickkoza.jsonkoza.addmovie has leaked window com.android.internal.policy.impl.phonewindow$decorview{3e1b7378 v.e..... r......d 0,0-1026,288} added here 03-20 18:28:20.184: e/windowmanager(14656): @ android.view.viewrootimpl.<init>(viewrootimpl.java:363) 03-20 18:28:20.184: e/windowmanager(14656): @ android.view.windowmanagerglobal.addview(windowmanagerglobal.java:261) 03-20 18:28:20.184: e/windowmanager(14656): @ android.view.windowmanagerimpl.addview(windowmanagerimpl.java:69) 03-20 18:28:20.184: e/windowmanager(14656): @ android.app.dialog.show(dialog.java:298) 03-20 18:28:20.184: e/windowmanager(14656): @ com.mickkoza.jsonkoza.addmovie$attempmovie.onpreexecute(addmovie.java:74) 03-20 18:28:20.184: e/windowmanager(14656): @ android.os.asynctask.executeonexecutor(asynctask.java:587) 03-20 18:28:20.184: e/windowmanager(14656): @ android.os.asynctask.execute(asynctask.java:535) 03-20 18:28:20.184: e/windowmanager(14656): @ com.mickkoza.jsonkoza.addmovie.onclick(addmovie.java:54) 03-20 18:28:20.184: e/windowmanager(14656): @ android.view.view.performclick(view.java:4756) 03-20 18:28:20.184: e/windowmanager(14656): @ android.view.view$performclick.run(view.java:19749) 03-20 18:28:20.184: e/windowmanager(14656): @ android.os.handler.handlecallback(handler.java:739) 03-20 18:28:20.184: e/windowmanager(14656): @ android.os.handler.dispatchmessage(handler.java:95) 03-20 18:28:20.184: e/windowmanager(14656): @ android.os.looper.loop(looper.java:135) 03-20 18:28:20.184: e/windowmanager(14656): @ android.app.activitythread.main(activitythread.java:5221) 03-20 18:28:20.184: e/windowmanager(14656): @ java.lang.reflect.method.invoke(native method) 03-20 18:28:20.184: e/windowmanager(14656): @ java.lang.reflect.method.invoke(method.java:372) 03-20 18:28:20.184: e/windowmanager(14656): @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:899) 03-20 18:28:20.184: e/windowmanager(14656): @ com.android.internal.os.zygoteinit.main(zygoteinit.java:694) thank help
michaël
one (or possibly all) of these views null:
string title = etitle.gettext().tostring(); string actors = eactors.gettext().tostring(); string director = edirector.gettext().tostring(); string kind = ekind.gettext().tostring(); string date = edate.gettext().tostring(); string image = eimage.gettext().tostring(); string summary = esummary.gettext().tostring(); possibly view ids you're referencing during oncreate find these views not correct?
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