I have asked the writer of the article in mention - and he as generously answered it on stack overflow. So I will direct any one who needs an answer for the issue there: http://stackoverflow.com/questions/8911776/androids-checkjni-how-to-turn-it-off-on-on-an-emulator-documentation-seems
On Jan 19, 12:05 pm, Jon Bonbon Jovi <[email protected]> wrote: > I have spent some time examining the checkjni mode using an Android > emulator with my app. > Altough it is written > (inhttp://android-developers.blogspot.com/2011/11/jni-local-reference-ch...) > that CheckJNI is on by default if debuggable="true" & targetSdkVersion > is at least Ice Cream Sandwich (in the AndroidManifest.xml file) - The > debug output dump of the CheckJNI (warning and errors) is still > printed in the DDMS, even if i use a Gingerbread values and install it > on a Gingerbread emulator. > > The only difference that i have found is that CheckJNI warnings on an > Ice Cream Sandwich emulator (no matter what were the values in my > AndroidManifest.xml file) will cause the app to crash with the > respected warning - while they would only be printed in a Gingerbread > emulator (I have tested a DeleteGlobalRef used on local reference to > induce this warning). > > There are two non-informational logs that are printed in accordance to > the AndroidManifest.xml - But the logs of the of the CheckJNI mode are > not affected. > > Here are the logs - > > #On ICS emulator > After Installing the app: > 01-19 08:43:01.491: D/AndroidRuntime(32): CheckJNI is ON > > Loading the app: > 01-19 08:32:26.617: D/dalvikvm(590): Not late-enabling CheckJNI > (already on) > (The last line is printed only when debuggable="true") > 01-19 08:32:27.066: I/dalvikvm(590): Turning on JNI app bug > workarounds for target SDK version 10... > (The last line is printed only when targetSdkVersion=10) > > On error code (crash): > 01-19 08:37:56.176: W/dalvikvm(651): JNI WARNING: DeleteGlobalRef on > non-global 0x41339550 (type=1) > ... > 01-19 08:37:56.187: E/dalvikvm(651): VM aborting > 01-19 08:37:56.187: A/libc(651): Fatal signal 11 (SIGSEGV) at > 0xdeadd00d (code=1) > > #On Gingerbread: > > After Installing the app: > 01-19 08:43:01.491: D/AndroidRuntime(32): CheckJNI is ON > > Loading the app: > No important logs > > On error code (no crash): > 01-19 08:45:20.079: W/dalvikvm(304): JNI: DeleteGlobalRef(0x40608718) > failed to find entry (valid=1) > > So my question is how should i turn it on/off - and how should it > affect the application (or the logs) differently when on? > > Thanks. > > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
