build problems for android_binary_package - Eclipse Indigo, Ubuntu 12.04

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I was able to install the jdk from oracle.com .
http://www.oracle.com/technetwork/java/javase/install-linux-64-self-extracting-142068.html Select your flavour of distro. Mine: jdk-6u33-linux-x64.bin

It's possible that my problems installing before were from choosing an "RPM" type package. Instructions on another page indicate that Ubuntu prefers the auto-installer to rpms.

I followed the steps you gave. However, I have some concerns over using update-alternatives as it caused numerous problems in the past. (Changed phython to 3.2 for a project, but it broke nearly everything else in my distro).

It wasn't obvious in Eclipse where to locate the JRE. Selecting File->Build Path->Configure Build Path -> Select libraries tab -> Add Library -> System JRE Library -> Add [ I tried searching all through the /opt/java/64 hierarchy but Eclipse never recognized what it wanted. Finally, clicking on "Search" button instead of "Add" and Eclipse found it automatically.
http://www.pasteall.org/pic/show.php?id=34395

This didn't clear up my issues in Eclipse however. I tried File->Refresh and Project->Clean. Nope. I tried re-starting Eclipse... but it no longer starts:

[Popup dialog] An error has occurred. See the log file /home/kesten/.eclipse/org.eclipse.platform3.7.0155965261/configuration/1341530909313.log.

[log file] !ENTRY org.eclipse.osgi 4 0 2012-07-05 18:28:30.390 !MESSAGE Application error !STACK 1 java.lang.UnsatisfiedLinkError: Could not load SWT library. Reasons: no swt-gtk-3740 in java.library.path no swt-gtk in java.library.path Can't load library: /home/kesten/.swt/lib/linux/x8664/libswt-gtk-3740.so Can't load library: /home/kesten/.swt/lib/linux/x8664/libswt-gtk.so

at org.eclipse.swt.internal.Library.loadLibrary(Library.java:285)

libswt-gtk is installed, but it's in my java.library.path for openJDK, not the sun version.

I think I'd prefer a less "invasive" method that switches just the jdk/jre used for the project, rather than switching the whole system which may have unintended consequences. Will play with this idea.

BTW... I did get the commandline "$ ant debug" build working. Reading build.xml is very helpful. Was also able to fix the samples/android/fix_properties.sh script to work on my system. Will describe this in another post.

Fixes: 1. Eclipse seems to have an easy tool for selecting JRE within a workspace without changing system settings (via update-alternatives). Right-click project -> Build Path -> Configure Build Path -> click Libraries Tab -> Add Library -> JRE -> Search. You can then browse to the top level install location of your Sun JDK distro and Eclipse will find the files it needs. 2. The OpenCV-2.4.0 package shows no errors or warnings in Eclipse

Problems: 1. All sample projects except OpenCV-2.4.0 (library) have errors due to import org.opencv.<package>
This is despite explicitly including the library in the project.properties, AndroidManifest.xml and listing it as a referenced package. http://www.pasteall.org/pic/show.php?id=34473

The following shows some of the paths I've tried in my 15-puzzle/project.properties file

# Project target.
target=android-11

sdk.dir=/home/kesten/android-sdk-linux
# This project.properties file lives in OpenCV-2.4.0/samples/android/15-puzzle
# relative path to folder with OpenCV-2.4.0.jar file
# android.library.reference.1=../../../modules/java/android
# relative path to folder with OpenCV-2.4.0 project.properties file
# android.library.reference.1=../../../
#android.library.reference.1=/home/kesten/Android-OpenCV-2.4.1/OpenCV-2.4.0/modules/java/android/

I'm not sure if android can handle absolute paths to resources, but neither relative nor abs worked for me.