Develop Reference

Include cwac-loaderex library in Android Eclipse project

I'm trying to use the cwac-loaderex library in my Android application. I cloned the repository and have imported the included project into my Eclipse project.
At this point I don't have any compilation errors in Eclipse, but when I try to run the application in the emulator I get:
03-23 20:34:16.895: E/dalvikvm(652): Could not find class 'com.commonsware.cwac.loaderex.SQLiteCursorLoader', referenced from method com.alwaysorderdessert.AlwaysOrderDessertActivity.onCreateLoader
How do I make sure that these external dependencies are loaded along with my application in the emulator and are also (by extension?) included in my distributed .apk?
Thanks!
Update
I have added the .jar file to my project and included in the build path, so now my project explorer window looks like the following:
However, I'm still getting the same error in the emulator. Any ideas?
Thanks again.
Update 2
After a bit of Googling and thanks to this SO answer I found that I just needed to check off the .jar file in the Java Build Path > Order and Exports tab.
Update 3
As was pointed out by the comment in the answer below, I should have copied the .jar file to the libs/ directory rather than lib/. This makes the other changes unnecessary (i.e., adding the .jar to the build path, selecting it for export). What a difference a letter makes!

Put the JAR in your libs/ directory, and that should be sufficient.
I noticed that my README was out of date, telling you to add it to your Eclipse build path. That was correct a year-and-change ago but is no longer needed and may contribute to your problems. Hence, if you manually adjusted your build path, undo that. I apologize for the stale instructions.

Paypal Mobile Express Checkout Library sample app gives me NoClassDefFoundError Exception

I'm testing the sample app for Mobile Express Checkout Library with Android.
I'm getting java.lang.NoClassDefFoundError: com.paypal.android.pizza.ResultDelegate
The error is on this Pizza.java line: PayPal.fetchDeviceReferenceTokenWithAppID(this, appID, server, new ResultDelegate());
I'm confused, i didnt find any info about that error on google, and also on the faq on paypal and x.com, so i don't know how to solve it.
I simply opened the sample code project and executed it.
This is the link to the project and the library: https://www.x.com/sites/default/files/PayPal_MECL_1.0_Android-Developer-Package_0.zip

There are only three reasons you will ever get this error:
The class genuinely doesn't exist. If you are using code from an official example and getting this, make sure you have the latest build of the library
You have not added the jar to your build path. To fix this, right click on the jar in Eclipse, and do Build Path ► Add to Build Path.
Your jar is not in the /libs folder. This happens when you have added the jar to the build path, but newer versions of ADT need it to be in /libs. Put it there and it will automatically be added to the build path. If it isn't, try doing a Clean build via ant clean or Project ► Clean in eclipse.
Mostly, such errors occur because newer versions of the ADT require all external jars to be in the libs folder.
By looking at the project you linked to, I can see the paypal jar in the project root. Instead, try moving it into a /libs folder. This should solve your problem.

I think you have not exported library jar from the configure build path section of eclipse.

create libs directory in project's directory and add move PayPal_MECL.jar to /libs. goto project properties and remove existing PayPal_MECL entry from libraries

Android - Adding JAR File to eclipse (hotpotato API)

I'm having this problem, and tried googling and doing tutorials in eclipse. But, it wasnt really helpful for me to use this .jar file in my project.
Source: https://github.com/brunodecarvalho/hotpotato
To be specific, I downloaded this jar file , added it to my project successfully by copying the jar file into my source folder , then added it by doing(Properties->Add Jars->And added it). Also i did a Project -> Clean.
Then once I start coding as they have shown in the examples, it gives me errors, which proves that the Adding of Jar file was not successful.
I tried in different eclipse workspaces but still no luck.
If I explain what I'm trying to do here, I'm working on a Android Download Manager Project. What I need to do is to create a pipeling connection to the request URL so that I can download the packets parallel.
Please help me find my mistake. Thanks for your time!

You can try the following:
Remove the jar from the buildpath - and make a folder called libs underneath the root of the project, at the same level as src / bin / etc.
Then put your lib in there, build path issues may then arise if you are in Eclipse but i believe everything should auto resolve from there.
In the past I have put the jar in the libs folder and additionally added it to the build path from there.
Does it error in the IDE, or at runtime?

Not all Java libraries are compatible with Android. Do what RenegadeAndy wrote here, and if that doesn't work, the lib might really be incompatible with Android.
Remember, Android is not a real Java implementation.

Android: Unable to include facebook sdk library project

I am working with Android API 17 on eclipse Indigo. I have cloned the faccebook sdk from github and done the facebook library project set up using the source project provided in the fb sdk.
Now I'm trying to include this library project in my android demo project. I have added it under Project properties->Android->Library section. Im seeing green color tick mark infront of the added library.
Also, i have added the same in the Project properties->Java build path->Projects.
build is successful. but when i try to install on my AVD, im getting the error, E/AndroidRuntime(748): java.lang.NoClassDefFoundError: com.facebook.android.Facebook
Can anybody plz help me how to fix this issue.
---- EDIT ------
One more thing I have observed is, when i opened Project properties->Android window, the green tick mark is not displaying under Library section, instead I'm seeing red cross mark.
Any ideas?
Thanks,
Venkat Papana

Same thing happen for me also.. try below .. it will work..
A Best way to add External Jars to your Android Project or any Java project is:
Create a folder called libs into you project root folder
Copy your Jar files to the libs folder
Now right click on the Jar file and then select Build Path > Add to Build Path, this will create a folder called Refrenced Library into you project, and your are done
By do doing like this, whenever you transfer you project to other Computer, you will not miss your libraries which are being referenced to some space on your Hard drive.
(The facebooksdk.jar can be found at the facebook-sdk directory: <facebook-sdk>\facebook\bin)

i know this question is old But I thought that may be it can help someone.
Move the library project and the application on the same drive. Usually this is a bug in Eclipse.
I solved my problem by moving them in same drive on my computer.
You can Give it a try.

You need to make both project in same dictionary then include it using Project Properties -> Android-> Library.
This works fine.

You do not have to add this to the library project as this is not the library.
https://github.com/facebook/facebook-android-sdk is the help of the project ad the sample code for the including the project in our code. Just you need to create the app ID for the facebook by registering your api with it.
Hope this will help you in your project.

Resolved by copying the com.facebook.android source code to my project source.

Android Eclipse NoClassDefFoundError for external .jar files

I have come across a strange error. I have an Android project that uses external libraries, in particular:
android-support-v4.jar (for Fragment support in Android 1.6)
GoogleAdMobAdsSdk-4.3.1.jar (for ads)
The project ran fine until I updated some aspects of the plugin (can't recall the specifics as I did not pay too much attention to it) and after that, whenever I try to use any class from the above .jar files (or any of its subclasses, even ones defined by me), I would get a java.lang.NoClassDefFoundError. I could not find the answer after much searching, so I am really stumped.
I believe this problem is related to how my IDE is set up and it has little to do with actual code, so I will not post any unless if it's absolutely necessary.

You need to read this - Dealing with dependencies in Android projects.
This link is also useful - ClassDefNotFoundError with ADT 17
Basically, create a folder called libs and place all of your jar files inside. The recent update will automatically take care of the rest for you. You don't need to edit your path anymore.

Android does not support Java1.7 up to now. Jars built with compliance level 1.7 cannot be used in Android Applications. Rebuild your Java project with compliance level 5.0 or 6.0 before exporting the jar file.
I found this post via google and answers above didn't solve my problem. Hope what I say will be helpful to others.

If you see NoClassDefFoundError after upgrading to ADT 22, try this in Eclipse:
Go to Project Properties → Java Build Path → Order and Export tab.
Check the Android Private Libraries option.

Also a warning to others who have updated to r17 with many dependencies. I had a another referenced project on my build path and it still did not work after following ALL the directions on this r17 issue on the internet.
Found out after an hour that my referenced project used an older version of an external Jar than my main project did. When trying to compile the main project, Eclipse would give up due to this jar version difference and I never noticed the warning message in Console.
Solution was to copy the newer version external jar file to the referenced project's libs directory.
Wow - such a productivity killer.....

I ran into this error today too, because of updating to the Android SDK, r17. What the links that #aneal pointed out do not discuss is how to handle external runtime libraries (such as those imported under their own heading - not an imported user library).
The easiest way to solve this problem is to change the build order in the build path. Simply right click on your project and select Properties. From here, select Java Build Path. At the top of the display, choose the tab order and export and move GoogleAdMobAdsSdk-4.3.1.jar above Android X (replacing x with the version you are using). Next, clean your project and run it. You should be good to go!

The way I solved it was by : Right clicking on the project and selecting build path. Select configure build path in the selections that appear. After that see if your libraries are there in the libraries folder and then select the order and export tab and over there select all your jar files. Then select ok and run your project.

If you're using Eclipse with Maven IDE (m2e) go to "Java Build Path" then "Order and Export" and finally check the item "Maven Dependencies" and pull it down to the BOTTOM of the list. You should do the same with project references in the same workspace.
Every time I setup the project in a new computer that happens.