Android - App crashing because of TextWatcher -
when write number in edittext works fine when delete number app crashes.
this code:
final edittext et2 = (edittext) findviewbyid(r.id.edittext2); final edittext et3 = (edittext) findviewbyid(r.id.edittext3); et2.addtextchangedlistener(new textwatcher() { @override public void ontextchanged(charsequence s, int start, int before, int count) { // todo auto-generated method stub } @override public void beforetextchanged(charsequence s, int start, int count, int after) { // todo auto-generated method stub } @override public void aftertextchanged(editable s) { decimalformat df = new decimalformat("#.00"); string et2string = et2.gettext().tostring(); int et2int = integer.parseint(et2string); double finpriceadulto = (priceadulto * et2int); textview tvpriceadulto = (textview) findviewbyid(r.id.textview7); tvpriceadulto.settext("" + df.format(finpriceadulto)); } }); et3.addtextchangedlistener(new textwatcher() { @override public void ontextchanged(charsequence s, int start, int before, int count) { // todo auto-generated method stub } @override public void beforetextchanged(charsequence s, int start, int count, int after) { // todo auto-generated method stub } @override public void aftertextchanged(editable s) { decimalformat df = new decimalformat("#.00"); string et3string = et3.gettext().tostring(); int et3int = integer.parseint(et3string); double finpricenino = (pricenino * et3int); textview tvpricenino = (textview) findviewbyid(r.id.textview8); tvpricenino.settext("" + df.format(finpricenino)); } }); and logcat error:
06-26 13:32:07.835 6321-6321/com.app.boyd44.myfirstapp e/androidruntime﹕ fatal exception: main process: com.app.boyd44.myfirstapp, pid: 6321 java.lang.numberformatexception: invalid int: "" @ java.lang.integer.invalidint(integer.java:137) @ java.lang.integer.parseint(integer.java:358) @ java.lang.integer.parseint(integer.java:331) @ com.app.boyd44.myfirstapp.myactivity$1.aftertextchanged(myactivity.java:68) @ android.widget.textview.sendaftertextchanged(textview.java:7445) @ android.widget.textview$changewatcher.aftertextchanged(textview.java:9232) @ android.text.spannablestringbuilder.sendaftertextchanged(spannablestringbuilder.java:970) @ android.text.spannablestringbuilder.replace(spannablestringbuilder.java:497) @ android.text.spannablestringbuilder.delete(spannablestringbuilder.java:212) @ android.text.spannablestringbuilder.delete(spannablestringbuilder.java:30) @ android.text.method.basekeylistener.backspaceorforwarddelete(basekeylistener.java:94) @ android.text.method.basekeylistener.backspace(basekeylistener.java:49) @ android.text.method.basekeylistener.onkeydown(basekeylistener.java:155) @ android.text.method.numberkeylistener.onkeydown(numberkeylistener.java:138) @ android.widget.textview.dokeydown(textview.java:5553) @ android.widget.textview.onkeydown(textview.java:5360) @ android.view.keyevent.dispatch(keyevent.java:2663) @ android.view.view.dispatchkeyevent(view.java:7796) @ android.view.viewgroup.dispatchkeyevent(viewgroup.java:1408) @ android.view.viewgroup.dispatchkeyevent(viewgroup.java:1408) @ android.view.viewgroup.dispatchkeyevent(viewgroup.java:1408) @ android.view.viewgroup.dispatchkeyevent(viewgroup.java:1408) @ com.android.internal.policy.impl.phonewindow$decorview.superdispatchkeyevent(phonewindow.java:2039) @ com.android.internal.policy.impl.phonewindow.superdispatchkeyevent(phonewindow.java:1509) @ android.app.activity.dispatchkeyevent(activity.java:2421) @ com.android.internal.policy.impl.phonewindow$decorview.dispatchkeyevent(phonewindow.java:1966) @ android.view.viewrootimpl$viewpostimeinputstage.processkeyevent(viewrootimpl.java:3875) @ android.view.viewrootimpl$viewpostimeinputstage.onprocess(viewrootimpl.java:3849) @ android.view.viewrootimpl$inputstage.deliver(viewrootimpl.java:3416) @ android.view.viewrootimpl$inputstage.ondelivertonext(viewrootimpl.java:3466) @ android.view.viewrootimpl$inputstage.forward(viewrootimpl.java:3435) @ android.view.viewrootimpl$asyncinputstage.forward(viewrootimpl.java:3542) @ android.view.viewrootimpl$inputstage.apply(viewrootimpl.java:3443) @ android.view.viewrootimpl$asyncinputstage.apply(viewrootimpl.java:3599) @ android.view.viewrootimpl$inputstage.deliver(viewrootimpl.java:3416) @ android.view.viewrootimpl$inputstage.ondelivertonext(viewrootimpl.java:3466) @ android.view.viewrootimpl$inputstage.forward(viewrootimpl.java:3435) @ android.view.viewrootimpl$inputstage.apply(viewrootimpl.java:3443) @ android.view.viewrootimpl$inputstage.deliver(viewrootimpl.java:3416) @ android.view.viewrootimpl.deliverinputevent(viewrootimpl.java:5565) @ android.view.viewrootimpl.doprocessinputevents(viewrootimpl.java:5545) @ android.view.viewrootimpl.enqueueinputevent(viewrootimpl.java:5516) @ android.view.viewrootimpl$viewroothandler.handlemessage(viewrootimpl.java:3187) @ android.os.handler.dispatchmessage(handler.java:106) @ android.os.looper.loop(looper.java:136) @ android.app.activitythread.main(activitythread.java:5212) @ java.lang.reflect.method.invokenative(native method) @ java.lang.reflect.method.invoke(method.java:515) @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:786) @ com.android.internal.os.zygoteinit.main(zygoteinit.java:602) @ dalvik.system.nativestart.main(native method) the crash has textwatcher because crashes when deleting in edittext.
i don't know how fix please help.
the textchanged gets called when delete content. when content empty. check condition , return.
decimalformat df = new decimalformat("#.00"); if(s.tostring().trim().length()==0){return} string et2string = et2.gettext().tostring(); int et2int = integer.parseint(et2string); double finpriceadulto = (priceadulto * et2int); textview tvpriceadulto = (textview) findviewbyid(r.id.textview7); tvpriceadulto.settext("" + df.format(finpriceadulto)); 
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