setText("") android error group=0x4001b188 -


i got problem when make edit text empty when button clicked. ddms said error uncaught exception group=0x4001b188. here y code

public class main extends activity {     float fm_value_pdty;     button calc_fm_pdty, dt_pdty_calc, loader_pdty_calc;     textview fm_value_pdty_txt;     edittext dt_count, loader_count;     public edittext dt_pdty;     public edittext loader_pdty;     public static float vdtpdty;     public static float vloaderpdty;      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);         fm_value_pdty=(float) 0;         calc_fm_pdty = (button) findviewbyid(r.id.calcpdty);         dt_pdty_calc = (button) findviewbyid(r.id.calcpdty_dt);         loader_pdty_calc = (button) findviewbyid(r.id.calcpdty_loader);         fm_value_pdty_txt = (textview) findviewbyid(r.id.fm_pdty_value);         dt_pdty = (edittext) findviewbyid(r.id.dtpdty_et);         loader_pdty = (edittext) findviewbyid(r.id.loader_ct_et);         vdtpdty=(float) 0.0;         vloaderpdty=(float) 0.0;           calc_fm_pdty.setonclicklistener(new view.onclicklistener() {              @override             public void onclick(view v) {                 // todo auto-generated method stub                 //if (dt_ct.gettext().tostring() <>""){                     if ((dt_pdty.gettext().tostring()!=null) &&  (loader_pdty.gettext().tostring()!=null))  {                         fm_value_pdty = ((float) integer.parseint(dt_pdty.gettext().tostring()))/((float) integer.parseint(loader_pdty.gettext().tostring()));                         fm_value_pdty_txt.settext("fleet matching value " + fm_value_pdty);                     }                     else if ((dt_pdty.gettext().tostring()==null) ||  (loader_pdty.gettext().tostring()==null)) {                         alertdialog.builder dlgalert = new alertdialog.builder(getapplicationcontext());                         dlgalert.setmessage("please input dt productivty , loader productivty");                         dlgalert.settitle("data empty");                         dlgalert.setpositivebutton("ok",null);                         dlgalert.setcancelable(true);                         dlgalert.create().show();                     }             }         });         dt_pdty_calc.setonclicklistener(new view.onclicklistener() {              @override             public void onclick(view v) {                 dt_pdty.vloaderpdty=vloaderpdty;                 dt_pdty.settext("");                 loader_pdty.settext("");                 intent pdty = new intent(main.this, dt_pdty.class);                 startactivity(pdty);                 dt_pdty.settext(float.tostring(vdtpdty));                 loader_pdty.settext(float.tostring(vloaderpdty));             }         });         loader_pdty_calc.setonclicklistener(new view.onclicklistener() {              @override             public void onclick(view v2) {                 ld_pdty.vdtpdty=vdtpdty;                 dt_pdty.settext("");                 loader_pdty.settext("");                 intent pdty = new intent(main.this, ld_pdty.class);                 startactivity(pdty);                 dt_pdty.settext(float.tostring(vdtpdty));                 loader_pdty.settext(float.tostring(vloaderpdty));             }         });     }       @override     public boolean oncreateoptionsmenu(menu menu) {         // inflate menu; adds items action bar if present.         getmenuinflater().inflate(r.menu.main, menu);         return true;     }  }

the code simple when try activate activity button first edit text emptied , activity start , after activity finish edit text has emptied fill calculated value activity. want make program has 2 edit text , 2 button. first edit text filled result first button , same other edit text , button. problem result first button when run second activity second button error. logcat because view of first edit text. updated post logcat. 

08-20 19:52:47.924: d/androidruntime(237): shutting down vm 08-20 19:52:47.958: w/dalvikvm(237): threadid=3: thread exiting uncaught exception (group=0x4001b188) 08-20 19:52:47.958: e/androidruntime(237): uncaught handler: thread main exiting due uncaught exception 08-20 19:52:48.028: e/androidruntime(237): java.lang.nullpointerexception 08-20 19:52:48.028: e/androidruntime(237):  @ com.example.fleetmatcher.main$2.onclick(main.java:66) 08-20 19:52:48.028: e/androidruntime(237):  @ android.view.view.performclick(view.java:2364) 08-20 19:52:48.028: e/androidruntime(237):  @ android.view.view.ontouchevent(view.java:4179) 08-20 19:52:48.028: e/androidruntime(237):  @ android.widget.textview.ontouchevent(textview.java:6541) 08-20 19:52:48.028: e/androidruntime(237):  @ android.view.view.dispatchtouchevent(view.java:3709) 08-20 19:52:48.028: e/androidruntime(237):  @ android.view.viewgroup.dispatchtouchevent(viewgroup.java:884) 08-20 19:52:48.028: e/androidruntime(237):  @ android.view.viewgroup.dispatchtouchevent(viewgroup.java:884) 08-20 19:52:48.028: e/androidruntime(237):  @ android.view.viewgroup.dispatchtouchevent(viewgroup.java:884) 08-20 19:52:48.028: e/androidruntime(237):  @ android.view.viewgroup.dispatchtouchevent(viewgroup.java:884) 08-20 19:52:48.028: e/androidruntime(237):  @ com.android.internal.policy.impl.phonewindow$decorview.superdispatchtouchevent(phonewindow.java:1659) 08-20 19:52:48.028: e/androidruntime(237):  @ com.android.internal.policy.impl.phonewindow.superdispatchtouchevent(phonewindow.java:1107) 08-20 19:52:48.028: e/androidruntime(237):  @ android.app.activity.dispatchtouchevent(activity.java:2061) 08-20 19:52:48.028: e/androidruntime(237):  @ com.android.internal.policy.impl.phonewindow$decorview.dispatchtouchevent(phonewindow.java:1643) 08-20 19:52:48.028: e/androidruntime(237):  @ android.view.viewroot.handlemessage(viewroot.java:1691) 08-20 19:52:48.028: e/androidruntime(237):  @ android.os.handler.dispatchmessage(handler.java:99) 08-20 19:52:48.028: e/androidruntime(237):  @ android.os.looper.loop(looper.java:123) 08-20 19:52:48.028: e/androidruntime(237):  @ android.app.activitythread.main(activitythread.java:4363) 08-20 19:52:48.028: e/androidruntime(237):  @ java.lang.reflect.method.invokenative(native method) 08-20 19:52:48.028: e/androidruntime(237):  @ java.lang.reflect.method.invoke(method.java:521) 08-20 19:52:48.028: e/androidruntime(237):  @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:860) 08-20 19:52:48.028: e/androidruntime(237):  @ com.android.internal.os.zygoteinit.main(zygoteinit.java:618) 08-20 19:52:48.028: e/androidruntime(237):  @ dalvik.system.nativestart.main(native method) 08-20 19:52:48.201: i/dalvikvm(237): threadid=7: reacting signal 3 08-20 19:52:48.422: i/dalvikvm(237): wrote stack trace '/data/anr/traces.txt' 08-20 19:52:50.620: i/process(237): sending signal. pid: 237 sig: 9

will need logcat know exact problem. few observations:

  1. dont try update edittext after startactivity(pdty).
  2. you dont need clear edittext replace text, i.e dont need edittext.settext("");
  3. if want clear edittext, there way: edittext.gettext.clear();

hope useful.


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