Question

I was able to build the mupdf library for android (libmupdf.so) and I got it working on the emulator. I have used the ndk: android-ndk-r5b & android-ndk-r4b, both work fine.

I have an app. that calls the mupdf library to read a PDF & save it as jpg files to the sdcard.

This works fine on the emulator (both 2.1 and 2.2) as well as on an Android 2.2 device API level 8 (LG Optimus).

However, on the Samsung Galaxy S (Android 2.1-update1 API level 7), the app installs fine, but on running, I’m getting the error :

ERROR/AndroidRuntime: Caused by:
java.lang.UnsatisfiedLinkError:
Library mupdf not found

I have tried building the library with ndk-r5b as well as prev. versions – ndk-r4, ndk-3 and ndk-r4b. There seems to be no change 🙁

Any ideas on what might be causing the error?!?! Any suggestions / help is appreciated.

Answer 1

The mupdf build file – Android.mk
included a library ‘jnigraphics’ which
is not required.

Linking this library and running on
Android 2.2 device or the emulator
(2.2 or 2.1) does not cause any
problems. However, if this library is
included and then run on an Android
2.1 device, (I used a Galaxy SI9000 Android 2.1-update1) causes an Android
runtime error, ‘Library mupdf not
found’.

In the Android.mk file, there was a library being linked, named – ‘libjnigraphics’. After the reference to this was removed, I was able to build for the Galaxy SI9000 Android 2.1-update1.