android - Play developer console: 2 error reports on 13k active users -

-

i have small question starting developer. i've created app has been downloaded quite lot last 2 weeks , has 13k active users. i've tested on few (samsung) phones , of course in emulator. can't generate errors, since app simple wasn't expecting so.

but today i've looked play developer console , found 2 error reports. should concerned or can errors randomly generated? know example bad custom roms can create crash, i've experienced myself.

i post class created this, plays selected sound when button clicked. 1 of crashes in nullpointerexception when button clicked, other illegalstateexception generated when mp.stop() called. me seems not possible generates error, of course wrong. code:

public class soundactivity extends activity implements onclicklistener,     oncheckedchangelistener {  button btn; mediaplayer mp; radiogroup slct; radiobutton radio0, radio1, radio2, radio3, radio4; int t = 1;  /** called when activity first created. */ @override public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     requestwindowfeature(window.feature_no_title);     setcontentview(r.layout.btclayout);     initialize();     btn.setonclicklistener(this);     slct.setoncheckedchangelistener(this);     mp = mediaplayer.create(this, r.raw.sound1);  }  public void initialize() {     btn = (button) findviewbyid(r.id.button1);     slct = (radiogroup) findviewbyid(r.id.radiogroup1);     radio0 = (radiobutton) findviewbyid(r.id.radio0);     radio1 = (radiobutton) findviewbyid(r.id.radio1);     radio2 = (radiobutton) findviewbyid(r.id.radio2);     radio3 = (radiobutton) findviewbyid(r.id.radio3);     radio4 = (radiobutton) findviewbyid(r.id.radio4);  }  @override public void onclick(view v) {     // todo auto-generated method stub     mp.stop();     mp.reset();     switch (t) {     case 1:         mp = mediaplayer.create(this, r.raw.sound1);         break;     case 2:         mp = mediaplayer.create(this, r.raw.sound2);         break;     case 3:         mp = mediaplayer.create(this, r.raw.sound3);         break;     }     mp.start(); }  @override protected void onpause() {     // todo auto-generated method stub     super.onpause();     mp.release(); }  @override protected void onresume() {     // todo auto-generated method stub     super.onresume();     mp = mediaplayer.create(this, r.raw.sound1); }  @override public void oncheckedchanged(radiogroup arg0, int arg1) {     // todo auto-generated method stub     switch (arg1) {     case r.id.radio0:         t = 1;         break;     case r.id.radio1:         t = 2;         break;     case r.id.radio2:         t = 3;         break;     case r.id.radio3:         t = 4;         break;     case r.id.radio4:         t = 5;         break;     } } }

edit: stacktraces play console:

java.lang.illegalstateexception @ android.media.mediaplayer._stop(native method) @ android.media.mediaplayer.stop(mediaplayer.java:1033) @ com.ddroid.dismyapp.soundactivity.onclick(soundactivity.java:57) @ android.view.view.performclick(view.java:3549) @ android.view.view$performclick.run(view.java:14400) @ android.os.handler.handlecallback(handler.java:605) @ android.os.handler.dispatchmessage(handler.java:92) @ android.os.looper.loop(looper.java:154) @ android.app.activitythread.main(activitythread.java:4944) @ java.lang.reflect.method.invokenative(native method) @ java.lang.reflect.method.invoke(method.java:511) @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:784) @ com.android.internal.os.zygoteinit.main(zygoteinit.java:551) @ dalvik.system.nativestart.main(native method)

the second one:

java.lang.nullpointerexception @ com.ddroid.dismyapp.soundactivity.onclick(soundactivity.java:76) @ android.view.view.performclick(view.java:2538) @ android.view.view$performclick.run(view.java:9152) @ android.os.handler.handlecallback(handler.java:587) @ android.os.handler.dispatchmessage(handler.java:92) @ android.os.looper.loop(looper.java:130) @ android.app.activitythread.main(activitythread.java:3687) @ java.lang.reflect.method.invokenative(native method) @ java.lang.reflect.method.invoke(method.java:507) @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:867) @ com.android.internal.os.zygoteinit.main(zygoteinit.java:625) @ dalvik.system.nativestart.main(native method)

while these errors should not happen, it's been experience users find way crash application in unintended ways :) in each of these failures, happened in onclick(), wrap onclick() code inside try/catch , log error. fact seeing error in developer console means user experienced force close issue, trapping error better.

in many state related issues i've seen, it's the user performing operation while doing rotate on device @ same time. using android monkey can randomly simulate these kinds of errors well.


Comments

Post a Comment

Popular posts from this blog

django - How can I change user group without delete record -

-
on website user have 1 group. , user can change group. it's made user.groups.clear() and user.groups.add(new_group) but it's not efficient, because there 2 sql query: delete, insert. how can change group update query? user , group related each other using manytomanyfield . means intersection table exists relating both entities, , if don't specify model map (using through attribute) django creates 1 you. looking @ sources django.contrib.auth.models see that's case. fortunatly, can access intermediary model using through attribute of manager (in case, user.groups.through ). can use regular model. example: >>> alice = user.objects.create_user('alice', 'alice@example.com', 'alicepw') >>> employee = group.objects.create(name='employee') >>> manager = group.objects.create(name='manager') >>> alice.groups.add(employee) >>> alice.groups.all() [<group: employee...
Read more

java - Need to add SOAP security token -

-
i need set custom soap header attribute on jax-ws generated webservice client. case webservice calls must go through proxy server requiring specific token (recieved web request header) present in soap request header. e.g.: 1 carserviceservice service = null; 2 service = new carserviceservice(new url(url), new qname(qname); 3 carserviceendpoint port = service.getcarserviceport(); it seems in line 3 wsdl retrieved , call fails due missing security token. 1 point direction on how done? a detailed example has been mentioned here: creating , deploying jax-ws web service on tomcat 6 this article shows how create , use security token .
Read more

java - EclipseLink JPA Object is not a known entity type -

-
i have strange problem eclipselink , object want persist. have 1 object (keypointlistimpl) stores object keypointimpl in list. persisting keypointimpl objects works great if try persist keypointlistimpl object java.lang.illegalargumentexception says object keypointimpl isn't known entity type. here keypointimpl code: @entity @table(name="keypoints") public class keypointimpl implements keypoint { @id @generatedvalue(strategy = generationtype.identity) private int id; @enumerated(enumtype.string) private detectortype keypointtype; private float x; private float y; private float size; private float angle; private float response; private int octave; private int classid; ... } here keypointlistimpl code: @entity @table(name="keypointlists") public class keypointlistimpl implements keypointlist { @id @generatedvalue(strategy = generationtype.identity) private int id; @onetoone(cascade={ca...
Read more