[Aerogear-users] An app crash scenario after clicking on push notification

Thu Apr 20 06:08:04 EDT 2017

Hi Summers,
first of all, i'd like to thank you for your precious suggestion.
I managed to launch my app using Android Emulator and together with the
logcat tool.
Thanks to this new approach, i was able to take some lines from the logcat
stacktrace and now i can share them in the following.

*04-20 11:35:44.861 31658 31658 E AndroidRuntime:
java.lang.RuntimeException: Unable to start activity
ComponentInfo{org.jboss.aerogear.android.cookbook.aerodoc/org.jboss.aerogear.cordova.push.PushHandlerActivity}:
java.lang.NullPointerException: Attempt to invoke interface method
'java.util.Collection org.jboss.aerogear.android.store.Store.readAll()' on
a null object reference... ... ... 04-20 11:35:44.861 31658 31658 E
AndroidRuntime: Caused by: java.lang.NullPointerException: Attempt to
invoke interface method 'java.util.Collection
org.jboss.aerogear.android.store.Store.readAll()' on a null object
reference04-20 11:35:44.861 31658 31658 E AndroidRuntime:     at
org.jboss.aerogear.cordova.push.PushHandlerActivity.processPushBundle(PushHandlerActivity.java:60)04-20
11:35:44.861 31658 31658 E AndroidRuntime:     at
org.jboss.aerogear.cordova.push.PushHandlerActivity.onCreate(PushHandlerActivity.java:45)04-20
11:35:44.861 31658 31658 E AndroidRuntime:     at
android.app.Activity.performCreate(Activity.java:6876)04-20 11:35:44.861
31658 31658 E AndroidRuntime:     at
android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1135)04-20
11:35:44.861 31658 31658 E AndroidRuntime:     at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3207)04-20
11:35:44.861 31658 31658 E AndroidRuntime:     ... 9 more*
As i wrote in the first mail, this is the app crash scenario. If I have my
app closed or already open, clicking on push notification seems to behave
correctly, bringing user to application first page. Instead, if I try to
close all my applications after receiving one or more push notification
(image notification frequency is quite low) and then I try to click on my
waiting push, application crashes showing a message that sound quite like
this “The program <app_name> has been interrupted”

Reading the log stacktrace, it seems like there's a NPE in
*PushHandlerActivity.java:60*, and more precisely when it tries to read the
store content.
Now, I don't know if it's the right place to face the problem, of if I
should open a ticket somewhere else, or if it's an already known and solved
bug, or if eventually it's some kind of problem related to a wrong
configuration in my app. Before losing me in all this wondering, can you
suggest me what to do? Could i try directly to change the java code in the
class PushHandlerActivity? Should it have effect, also eventually to make a
test locally?

Here some information about my test conditions which could be useful.

OS: Android 6.0.1
Device: Samsung S6
Aerogear Plugin Version: 3.1.0

We're talking about a cross platform application developed with Ionic 1 and
Angular 1.
I did not try to verify if the problem is happening also on a iOS device,
but i'm gonna do it immediately after writing this reply.
Do you think some other info could be useful?

Thanks anyway, Federico.

2017-04-19 13:37 GMT+02:00 Summers Pittman <supittma at redhat.com>:

> The easiest tool to use is logcat with the Android emulator.  Logcat is
> part of the Android SDK which you installed while you were setting up your
> development environment (it may have been installed by another tool but it
> is there).
>
> All you need to do is, from the command line, run logcat.  Then run your
> application and wait for it to crash, and you will find the stack trace
> (and a bunch of other stuff), in the log.  It is possible to filter the
> logcat output based on the package name of the application generating logs,
> but one thing at a time.
>
> Summers
>
> On Wed, Apr 19, 2017 at 4:11 AM, Federico Cerminara <
> fedecentrico at gmail.com> wrote:
>
>> Still not able to introduce a tool to produce a stacktrace. I know it
>> would be helpful (if you have suggestions about which tool/plugin/approach
>> to use...) but now i am still not able to do it. I’m a beginner in cross
>> platform app development, as i said before :(
>>
>> 2017-04-18 17:23 GMT+02:00 Summers Pittman <supittma at redhat.com>:
>>
>>>
>>>
>>> On Tue, Apr 18, 2017 at 10:55 AM, Federico Cerminara <
>>> fedecentrico at gmail.com> wrote:
>>>
>>>> Hi Summers,
>>>> thanks for your immediate reply. The OS on the device i am testing now
>>>> is Android 6.0.1, but I don't know if it's an useful information cause I'm
>>>> using Ionic 1 and Angular 1 to develop a Cross Platform App.
>>>>
>>>> The code is not publicly available but I can share some code pieces if
>>>> you suggest me which pieces of code could help us for this analysis.
>>>>
>>>> It's not ax example app, I just took inspiration from the snippet of
>>>> code included in Android aerogear variant and used them to complete my
>>>> app.js code.
>>>>
>>>> How could you help me?
>>>>
>>>
>>> Would you be able to include your stack trace from logcat when the
>>> application crashes?
>>>
>>> I'm not as familiar with Cordova as I should be, but I should be able to
>>> make heads or tails of it.
>>>
>>>
>>>> Thanks anyway, Federico.
>>>>
>>>>
>>>> 2017-04-18 16:33 GMT+02:00 Summers Pittman <supittma at redhat.com>:
>>>>
>>>>> Frederico,
>>>>>
>>>>> Hi, sorry you are having trouble with UPS.  If you could help us out
>>>>> by answering a couple of questions that would be great.
>>>>>
>>>>> 1) Which OS is your applicatoin having trouble on and are you using
>>>>> Cordova or native libraries?
>>>>>
>>>>> 2) Is your code publicly available somewhere for us to look at?
>>>>>
>>>>> 3) Are you using the example app or is this your own implementation?
>>>>>
>>>>> I know from experience that with Android one of the common problems is
>>>>> that if the application has been killed by the OS then the Push libraries
>>>>> have to be reinitialized before you can send metrics to the server.  If you
>>>>> are initializing your push libraries in an Activity class instead of the
>>>>> Application class this may be something to double check.  Of course if this
>>>>> is iOS or Cordova then everything I just said is nonsense :)
>>>>>
>>>>> Summers
>>>>>
>>>>> On Tue, Apr 18, 2017 at 10:18 AM, Federico Cerminara <
>>>>> fedecentrico at gmail.com> wrote:
>>>>>
>>>>>> Hi,
>>>>>> my name is Federico Cerminara, 35 years old, engineer and web
>>>>>> developer in Rome.
>>>>>> I’m a beginner in cross platform app development and I’ve started
>>>>>> using aerogear cordova push plugin to enable reception of push
>>>>>> notification.
>>>>>>
>>>>>> I’ve developed my first app. I’m able to receive correctly push
>>>>>> notification, both sending them directly by aerogear admin panel after
>>>>>> choosing a variant and and sending them from the application backend
>>>>>> following a custom logic. If I have my app closed or already open, clicking
>>>>>> on push notification seems to behave correctly, bringing user to
>>>>>> application first page. Instead, if I try to close all my applications
>>>>>> after receiving one or more push notification (image notification frequency
>>>>>> is quite low) and then I try to click on my waiting push, application
>>>>>> crashes showing a message that sound quite like this “The program
>>>>>> <app_name> has been interrupted”
>>>>>>
>>>>>> Can you tell me a way to solve this problem?
>>>>>> Thanks anyway, Federico.
>>>>>>
>>>>>> _______________________________________________
>>>>>> Aerogear-users mailing list
>>>>>> Aerogear-users at lists.jboss.org
>>>>>> https://lists.jboss.org/mailman/listinfo/aerogear-users
>>>>>>
>>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> Aerogear-users mailing list
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>>>>>
>>>>>
>>>>
>>>>
>>>> --
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>>>> <http://twitter.com/fedecentrico>, anobii
>>>> <http://www.anobii.com/fedecentrico/books>
>>>> Link consigliati: Piccoli Maestri <http://www.piccolimaestri.org>, Il
>>>> clima di Cipro <http://www.facebook.com/#%21/IlClimaDiCipro>
>>>>
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>>>>
>>>
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>>
>>
>> --
>> Puoi trovarmi qui, se vuoi:
>> facebook <http://www.facebook.com/fedecentrico>, flickr
>> <http://www.flickr.com/photos/fedecentrico>, linkedin
>> <http://it.linkedin.com/in/fedecentrico>, twitter
>> <http://twitter.com/fedecentrico>, anobii
>> <http://www.anobii.com/fedecentrico/books>
>> Link consigliati: Piccoli Maestri <http://www.piccolimaestri.org>, Il
>> clima di Cipro <http://www.facebook.com/#%21/IlClimaDiCipro>
>>
>> _______________________________________________
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>>
>
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>

-- 
Puoi trovarmi qui, se vuoi:
facebook <http://www.facebook.com/fedecentrico>, flickr
<http://www.flickr.com/photos/fedecentrico>, linkedin
<http://it.linkedin.com/in/fedecentrico>, twitter
<http://twitter.com/fedecentrico>, anobii
<http://www.anobii.com/fedecentrico/books>
Link consigliati: Piccoli Maestri <http://www.piccolimaestri.org>, Il clima
di Cipro <http://www.facebook.com/#%21/IlClimaDiCipro>
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