android - ProgressDialog crash in onPreExecute() method -

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the progressdialog crashing in onpreexecute() method.

below code snippet:

        public class testcasesactivity extends activity {                 super.oncreate(savedinstancestate);                 setcontentview(r.layout.activity_testcases);                  xmlhelp = new xmlhelper();                  configparser confparser = new configparser();                 confparser.execute();             }              private class configparser extends asynctask<void, void, void> {                 private progressdialog dialog;              @override             protected void onpreexecute() {                 dialog = new progressdialog(testcasesactivity.this);                 dialog.setmessage("loading testcases configuration...");                 dialog.show();             }          @override         protected void doinbackground(void... params) {             xmlhelp.getnumberofnodes();             return null;         }          @override         protected void onpostexecute(void v) {             dialog.dismiss();             // show test cases list here via listview         } }

please suggest can wrong here. logcat prints given below:

07-30 08:13:50.511 20200-20200/? e/windowmanager﹕ android.view.windowleaked: activity com.testcasesactivity has leaked window com.android.internal.policy.impl.phonewindow$decorview{31a83555 v.e..... r......d 0,0-1026,348} added here @ android.view.viewrootimpl.(viewrootimpl.java:363) @ android.view.windowmanagerglobal.addview(windowmanagerglobal.java:262) @ android.view.windowmanagerimpl.addview(windowmanagerimpl.java:69) @ android.app.dialog.show(dialog.java:298) @ com.testcasesactivity$configparser.onpreexecute(testcasesactivity.java:41) @ android.os.asynctask.executeonexecutor(asynctask.java:587) @ android.os.asynctask.execute(asynctask.java:535) @ com.testcasesactivity.oncreate(testcasesactivity.java:30) @ android.app.activity.performcreate(activity.java:5984) @ android.app.instrumentation.callactivityoncreate(instrumentation.java:1105) @ android.app.activitythread.performlaunchactivity(activitythread.java:2254) @ android.app.activitythread.handlelaunchactivity(activitythread.java:2361) @ android.app.activitythread.access$800(activitythread.java:147) @ android.app.activitythread$h.handlemessage(activitythread.java:1281) @ android.os.handler.dispatchmessage(handler.java:102) @ android.os.looper.loop(looper.java:135) @ android.app.activitythread.main(activitythread.java:5232) @ java.lang.reflect.method.invoke(native method) @ java.lang.reflect.method.invoke(method.java:372) @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:904) @ com.android.internal.os.zygoteinit.main(zygoteinit.java:699)

there crash caused parser before:

07-30 08:40:32.651  22982-23154/? e/androidruntime﹕ fatal exception: asynctask #1     process: com.performance_tool, pid: 22982     java.lang.runtimeexception: error occured while executing doinbackground()             @ android.os.asynctask$3.done(asynctask.java:300)             @ java.util.concurrent.futuretask.finishcompletion(futuretask.java:355)             @ java.util.concurrent.futuretask.setexception(futuretask.java:222)             @ java.util.concurrent.futuretask.run(futuretask.java:242)             @ android.os.asynctask$serialexecutor$1.run(asynctask.java:231)             @ java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1112)             @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:587)             @ java.lang.thread.run(thread.java:818)      caused by: org.w3c.dom.domexception: 1 root element allowed             @ org.apache.harmony.xml.dom.documentimpl.insertchildat(documentimpl.java:421)             @ org.apache.harmony.xml.dom.innernodeimpl.appendchild(innernodeimpl.java:52)             @ org.apache.harmony.xml.parsers.documentbuilderimpl.parse(documentbuilderimpl.java:306)             @ org.apache.harmony.xml.parsers.documentbuilderimpl.parse(documentbuilderimpl.java:128)             @ javax.xml.parsers.documentbuilder.parse(documentbuilder.java:107)             @ com.xmlhelper.getnumberofnodes(xmlhelper.java:29)             @ com.testcasesactivity$configparser.doinbackground(testcasesactivity.java:46)             @ com.testcasesactivity$configparser.doinbackground(testcasesactivity.java:33)             @ android.os.asynctask$2.call(asynctask.java:288)             @ java.util.concurrent.futuretask.run(futuretask.java:237)             at android.os.asynctask$serialexecutor$1.run(asynctask.java:231)             at java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1112)             at java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:587)             at java.lang.thread.run(thread.java:818)

solution 1: should dismiss progress dialog @ onpostexecute. this.

protected void onpostexecute(...){     // dismiss dialog here     dialog.dismiss(); }

have done step?

solution 2: if done step on onpostexecute , still getting error means please check out next solution below,

pass context oncreate method asynctask this,

confparser.execute(testcasesactivity.this);

and async task this,

    private class configparser extends asynctask<void, void, void> {         private progressdialog dialog;         context context;          public configparser(context context){         this.context=context;         }          @override         protected void onpreexecute() {             dialog = new progressdialog(context);             dialog.setmessage("loading testcases configuration...");             dialog.show();         }         @override        protected void onpostexecute(...){        // dismiss dialog here        dialog.dismiss();        } }

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