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UnsatisfiedLinkError on Samsung Galaxy Tab 3 with native application

April 16, 2015 - 7:29am #1

We have an application that works fine on all the test devices we've tried except the Samsung Galaxy Tab 3.  It turns out this uses an Atom processor, though I understand this should have an ARM-compatible layer on top of it.  Anyway, the error we get is this one:

java.lang.UnsatisfiedLinkError: Native method not found: com.qualcomm.QCAR.QCAR.requiresAlpha:()Z
at com.qualcomm.QCAR.QCAR.requiresAlpha(Native Method)
at our.main.ArActivity.initApplicationAR(VideoPlaybackActivity.java:1096)
at our.main.InitialArActivity.onCreate(InitialArActivity.java:183)
at android.app.Activity.performCreate(Activity.java:5231) ....

This looks like it's essentially one of the first native calls we have within the app.  What are the possible causes for the library not being loaded?

UnsatisfiedLinkError on Samsung Galaxy Tab 3 with native applica

April 17, 2015 - 10:51am #4

I tried the Native Vuforia Sample App 4.0.103 and was able to launch Image Targets and it worked fine on the Samsung Tab 3 10.1 having Intel Atom Z2560 processor. So looks like Vuforia works fine on this Samsung Tab.

As Ale mentioned, you can try building the VuforiaSamples and see if you are able to run it.

Thanks!

UnsatisfiedLinkError on Samsung Galaxy Tab 3 with native applica

April 17, 2015 - 3:17am #3

Vuforia supports armv7 architecture on Android, however if the device in question (with Atom x86 CPU) can do "arm emulation", it should be possible to run the app;

it is probably a matter of verifying whether the that Samsung device and the Atom CPU are supporting arm emulation.

Also, have you verified that the Vuforia Samples exhibit the same behaviour ? If the samples run fine, this would confirm that the ARM-emulation layer is working properly, and the issue would only be limited to your specific app; otherwise, it would be a possible indication of an issue with that layer.

 

 

 

UnsatisfiedLinkError on Samsung Galaxy Tab 3 with native applica

April 17, 2015 - 12:01am #2
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