I'm creating a new app and I want to use some libraries like this: https://github.com/JakeWharton/Android-ViewPagerIndicator
I had downloaded this library, added it to my workspace using New Android Project -> Create from existig source. Went to properties > android, and checked Is Library. Then I went to properties > android in my app project, and clicked add on the Libraries section, and chose the library, and It show me the library with a green V near it. I've clicked ok, but couldn't use the library so I've opened the properties > android again, and there was a red cross near the library, and '?' under the "Project" column.
I can't understand why it's happening! It's really annoying, happened to me when I tried to add facebook API to my app, and I just gave up and copied the source to my project.
Thanks
You have to copy every Library manually inside Eclipse Workspace, before importing it, as Eclipse seems to be silly if the Library lays somewhere else. Also symlinking a Library will not work.
The solution for me was to Delete the library project from Eclipse (but not from disk of course), and Import it again (Import existing Android Code into Eclipse). The problem disappeared then.
Related
So every once in a while I will add an Android project to my eclipse workspace and link it to libraries in my workspace. For exmaple, I just imported a project via the git import that requires the appcompat_v7 library. The appcompat_v7 library is being used by a number of projects in my workspace successfully. However, when I attempt to link my imported project to the library it fails.
I attempt to add the library like so: Right click project -> Properties -> Android -> Add -> Select and add appcompat_v7. It will show a green check, I click apply, close the window, and clean my project.
Like so:
Then you can see, it appears to be successful
However, I will open the properties window again and the library now has a red x next to it's absolute file path (D:\Workspace\android\appcompat_v7) where it should have an relative path (../../appcompat_v7) like it does for the projects that it works with. The slashes also reverse (not sure if this is significant).
It is like what is going on here:
Eclipse will not recognize project as library (ActionBarSherlock/ViewPagerIndicator)
But I can't seem to do anything to get it to work, and it doesn't seem consistent. Some imported projects can be linked to the library fine, some can't. I can restart, refresh, relocate files, duplicate files in different folders, reimport libraries, manually changing the paths in project.properties to relative, etc. Nothing seems to work.
I also noticed that my project.properties file isn't called just "project.properties", but is called " > project.properties". Not sure what that means.
This is a pretty big issue as it literally keeps me from being able to work with some projects. What might be happening? Again, attaching the library is successful 90% of the time, but when it doesn't it is a huge headache.
Your Project and the Library you are importing, both should be in the same workspace. So when you are importing appcompat_v7 library project, just tick on the checkbox "Copy projects into workspace" . Now add this library into your project, and you wont get any red 'x' button.
I ended up just changing my git repository location to a folder called GitRepository that I put in my workspace. Instead of importing my project from it's git repository I simply cloned the project into the Git repository in my workspace and it seemed to work.
I feel as though there might have been some linking issues in the background or something. Though my workspace contained my imported project, and the link to that project wasn't symbolic (it pointed directly to my project in my workspace) it seemed to be linking to my repository even after the import. I don't know exactly what was going on, but this was my fix.
I can’t link Android projects in Eclipse.
I get a VerifyError, and some can’t find class warnings, which I assume means that it’s not getting the library.
I’m using project properties > Java Build Path > Projects.
I can get it to work by referencing the other projects jar. Then setting the source attach so that I can step through the code, but this is a much uglier way of setting the projects up because linking to source and linking to the jar doesn’t allow the use of path variables. So the next person to pick up this project is going to be really confused when the project doesn’t work for them.
Is it possible to directly link projects?
Is it possible to use path variables to reference jars and source
attachments?
It’s so easy to do in Flash Builder…
Also, when I change anything in properties > Android then hit okay, when I open properties > Android the changes have been reverted, what's that about?
If you are asking if an android project can reference a "library" project, the answer is yes; open the properties for the main android project and select Android menu and then at the bottom half of the screen, you can Add your library project to your main project. Note that the "library" project should be set as a library project (same UI allows you to set a project as library)
HTH,
Ali.
assuming you're talking about a library project that you have in your eclipse workspace.
go to properties -> Android
on the bottom half of the screen you should see a "Library" pane.
click add and point it to your library that's in your workspace that you want to add.
click apply afterwards.
i'd remove what you added in that library pane that you're talking about. that's for jar libraries that you've added to your project's libs folder.
I'm trying to get ActionBarSherlock and the ViewPagerIndicator libraries set up for my projects, but I seem to be running into a few issues. I sent Jake Wharton (The developer) a few messages earlier about it, and got a few replies but couldn't get anywhere - and I think he got busy with a few other things.
What my issue is, For both VPI and ABS
Both libraries open up without any errors, and I'm using compiler version 1.6 for all as is required.
The funny thing is, if I load in the samples that are provided - they work fine and link to his library; but when I go to add the library to my project - the above happens.
Where to store the actual library project does not matter, as long as you use a relative link to reference it. Check out the Library Projects - Development considerations:
Library project storage location
There are no specific requirements on where you should store a library project, relative to a dependent application project, as long as the application project can reference the library project by a relative link. What is important is that the main project can reference the library project through a relative link.
You should always use the Eclipse ADT plugin to select and set up Library Project Reference, i.e. right-click project -> Properties -> Android -> Add, then in the opened Project Selection window, select the Library Project list here (of cause you should import them in the same Eclipse workspace as your Main Project). This will add a android.library.reference using relative path into project.properties as well as show relative path in the Android preference window:
android.library.reference.2=../../../../../Documents and Settings/yorkw/Desktop/JakeWharton-Android-ViewPagerIndicator-f09acb0/library
If you directly alter it using absolute path from project.properties as below:
android.library.reference.1=C:\\Documents and Settings\\yorkw\\Desktop\\JakeWharton-Android-ViewPagerIndicator-f09acb0\\library
Then after Eclipse refresh your project, you get the exact error described in your question, see my screenshot below:
Hope this helps.
While importing the libraries, make sure that you tick the "Copy projects int workspace" check box. The library projects need to be in the same workspace for them to work.
delete and import the project and lib again. build the lib project , add lib to project, still error shows.. rename the lib project. this worked for me ....
I'm creating a new app and I want to use some libraries like this:
https://github.com/JakeWharton/Android-ViewPagerIndicator
I had downloaded this library, added it to my workspace using New Android Project -> Create from existig source.
Went to properties > android, and checked Is Library.
Then I went to properties > android in my app project, and clicked add on the Libraries section, and chose the library, and It show me the library with a green V near it.
I've clicked ok, but couldn't use the library so I've opened the properties > android again, and there was a red cross near the library, and '?' under the "Project" column.
I can't understand why it's happening! It's really annoying, happened to me when I tried to add facebook API to my app, and I just gave up and copied the source to my project.
Thanks, Elad!
Copy every Library manually inside Eclipse Workspace, before importing it, as Eclipse seems to be silly if the Library lays somewhere else. Also symlinking a Library will not work.
For me, I just restart the eclipse and the added library works fine.
I mean first time it showing red marks after adding the library project.
Though eclipse main project and library project are in same workspace folder and no resources files are in outside of the project folder.
So, you can try with to restart your eclipse. Happy coding....
As I was writing up this question I managed to solve it so repeat it here for the benefit of others. Here is the initial problem:
I have created a very simple library project which I want to reference in another project. I have done this previously with no problems so not really sure why it is not working this time. I have:
Flagged the library project via project properties. The default.properties file has this set : android.library=true
In my other project added reference to my library project via project properties. The default.properties file has the reference added as expected ie android.library.reference.1=K:/android_test_ws/applicationRegistrar
The green tick against the referenced library project starts off green and then changes to a red cross.
This implies that there must be something wrong / missing from the library project but I don't know what. My library project on this occasion is MUCH simpler than the previous one I created.
OK Here is the solution which I found when I was looking for the default.properies file of the referencing project (not the library) in my file system. Although the referencing project was in the same eclipse workspace as the library project, the actual files were somewhere else in the file system ie they were'nt in the same parent folder of the library project. As soon as I placed the referencing project in the same physical folder as the library project it all went fine.
I guess that this must be something to do with android using ant underneath the covers.
Edit: The project name needs match the folder name on the file system. What you are seeing in the Project Properties->Android->Library Reference is a relative file system path.
Make Sure both the projects are present in same work space.
To Do it, while importing the projects make sure "copy project into work space" check box is checked.
the same problem will occur if your library project is in different partition from your current workspace. I have the same problem just now. My git source is in C: and I just move my workspace to D: and everything start to collapse.
Simplest way to get the library paths paths correct is to use the GUI from Eclipse to add the library as shown in the following screenshot and let Eclipse take care of putting the correct relative paths in project.properties. Its a common setup to have your library projects hosted at directories vastly different than your main projects that uses the library. This method will work if the "libary project" and the project using it are in the same eclipse "workspace" (they "need not" be in same parent folder):
Please ensure that the library project is marked as "Is Library" - right click on the library project - properties - Android - mark the "Is Library" checkbox - in project.properties of the library project you should have a new entry:"android.library=true. Now add it into the project you want as described in the post below.(the post with image integrated - from Nilesh Pawar).
This bug is referenced several times here 27199, 35786, 36460 & 38052
Maybe by voting for them, it will be fixed one day...
Yet another observation on the same issue.
For me the two projects where on the same parent folder, and were both local inside the workspace. Even then the issue was still happening.
The I edited the "project.properties" file and put the absolute path(with forward slashes '/' for seperator) of the library project. Saved and closed it. Then went to the project properties dialog, removed the library(which was still showing the cross icon but with abs path) and added it back as usual.
Surprisingly the issue is resolved, and the project compiles and runs.
This is really strange and must be a bug with the ADT.
I am using ADT version 20.0.2
when developer referencing the facebook or any other library project then first of all clean the project from eclipse->project->clean project.
that want allow the error of red cross in referencing screen.
For me, I just restart the eclipse and the added library works fine.
I mean first time it showing red marks after adding the library project.
Though eclipse main project and library project are in same workspace folder and no resources files are in outside of the project folder.
So, you can try with to restart your eclipse. Happy coding....
Workaround for me was to
Create a new workspace
Import Library Project in that workspace
Import The desired project in that workspace
Having both project and library project the same target Android OS version
Reference library project in my project
solved my problem
i had the same problem there when i try to change my workspace so this my solution:
import and copy all project data including library project into workspace
delete the old project reference by Right-click on the project-->Properties-->Android-->Library, and select corrupted library(so that waht i call it) and choose Remove
clean project first (to refresh ur project properties)
go to library project Properties-->Android-->Library and check the is library if it does'nt click Apply then OK
if the library project is library is already checked, first Unchecked it then Clean the library project after that do the Step 4 again
go to project that u want the library are in then Right-click on the project-->Properties-->Android-->Library, Add then choose the library project (it should be there) and click Apply then OK
if still doesn't appear clean the project once more time and that should do
Just restart your eclipse. It's solve my problem
When you have a look at the reference-path before and after, it comes from i.e. "C:/workspace/mylib" and goes to "../../mylib" when copied to the correct location, quite interesting.
FYI,
What worked for me was to delete the 'library' projects (the actual projects) from my workspace (without deleting the files), and then re-importing them using the wizard (import existing android project from source code).
Thanks for posting the question.
I had exactly the same problem while integrating Facebook with my Android application. I fixed the issue by moving my development project to the same Windows drive in which library project was located. Somehow Eclipse is unable to read the library project's location properly from default.properties file if it is in a different drive.
Similar to Sufi Khan's post I also solved this issue with a reboot. My case differed in that when I first accessed Properties->Android and added the library I got a lovely green checkmark. When I closed the dialog Eclipse was still showing class-not-found type errors. When I checked the properties again I saw the red X. But Mr. Kahn's solution (delete the bad lib, restart Eclipse, add the lib again) worked fine.
I'm using the 0702 version of the ADT bundle (starts with "cluster", rhymes with "duck").
I followed the accepted answer but also had to make sure my "project.properties" file was readable.
If the file is readonly (checked into source control) eclipse will not edit it. Adding the library reference will succeed, but the change won't be persisted after hitting OK.
If closing the preferences window and reopening in again removes the library you just added, this may be your solution.
In case your library project still doesn't show up try adding library flag in your library project properties
Add android.library=true
project.properties
# This file is automatically generated by Android Tools.
# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
#
# This file must be checked in Version Control Systems.
#
# To customize properties used by the Ant build system edit
# "ant.properties", and override values to adapt the script to your
# project structure.
#
# To enable ProGuard to shrink and obfuscate your code, uncomment this (available properties: sdk.dir, user.home):
#proguard.config=${sdk.dir}/tools/proguard/proguard-android.txt:proguard-project.txt
# Project target.
target=android-17
android.library=true