Develop Reference

NoClassDefFoundError for libs added in Android Lib Project

I have a Android Lib Project which has a number of libraries (jars) added in /lib folder.
Now, I have written a Android Test Project to test the APIs of the Library project and I added the jar of the Lib project inside this test project.
Everything complies fine but when the code, in the Library project executes, which uses the jar file, I am getting a NoClassDefFoundError.
Could someone please help me with this issue?
Please do let me know what other details would be required from my end.
Thanks

Try to Clean Project and Run it again.

Try this way,
Right click on your project --> select Build Path --> go to Order and Export Tab
Check all the libs you added here and done.

How do i import this project?

Hi I have found this github project:
https://github.com/ManuelPeinado/FadingActionBar
I have tried to import "samples-stock" and "library" into eclipse. Then I assign "library" as a library and add it in "samples-stock".
How would you make it work? I dont understand the authors instructions:
The library is pushed to Maven Central as a AAR, so you just need to add the following dependency to your build.gradle.
Thanks

Does your project, in which you want to use this lib, uses Gradle as build system?
If so, add dependency to build.gradle, as author suggests:
dependencies {
compile 'com.github.manuelpeinado.fadingactionbar:fadingactionbar:3.1.2'
}
Else, I believe Android Studio is Intellij IDEA Community Edition, just with android plugin, thus you should be able to add dependency from "Maven" in Libraries. Just copy & paste the
"com.github.manuelpeinado.fadingactionbar:fadingactionbar:3.1.2"
line to the window which opens.

In eclipse:
File->Import->Existing android code into workspace and import library from disk drive.
If you want to run samples that are present in that library you can run them as "Android Application", like any other project.
If you want to use it in your project:
Right click on your project -> Properties -> Android -> Add(select that library) and you are good to go.

eclipse android can not import google play services library

hello i am quite new to Android development and i want to learn how to use the google Maps API v2. After trying numerous tutorials, i always seem to have a problem with the google play services library. Somehow, Eclipse can't import it properly. I tried this tutorial https://github.com/thecodepath/android_guides/wiki/Google-Maps-Fragment-Guide and when i try to include Google Play Services project as a library, first it all goes nice and smooth, i get a green tick in the Project Properties - Android - Library window, but when i close it i still get lots of "can't be resolved to a type" errors. I return to the window where i add the library and i see a red "X" and a question mark under "project" instead of the green tick. I tried several other tutorials and i always have a problem with this library. I like this tutorial and i would really like to make it work. I also tried to manually copy the library folder in the workspace but that didn't work either. I googled like crazy trying to find an answer but i always find something that i tried before (like manually copying the library in the workspace or something similar). I am quite desperate, i really have no idea why it can't just see the library please help. Also this is my first post to StackOverflow so be gentle :)
later Edit (solved):
when i imported the downloaded project, i kept it on the desktop and thats why it didn't work, after i copied it in the workspace everything worked. Thank you all very much for helping a beginner :)

The important thing in adding a library in eclipse is to remember that your project and the library project need to be in the same workspace.
To solve this follow below ways,
You can copy the google-play-services library project to the same workspace where your main project is there.
else
While importing the library to eclipse remember to check copy projects into workspace which will add a copy of the library to your workspace.

I see a red "X" and a question mark under "project" instead of the
green tick.
The problem is -
The path to your google play services library is not same as the path to your project. It is outside of your project. And so is not recognized by simple import.
Solution - Put the library in the project's libs folder.
NOTE: Just putting the library to the libs folder is not enough.
After you added your library follow these steps -
1) Go to Project -> Properties -> Java Build Path -> Libraries -> Add JARs..
2) Now add your recently added jar to the build path from JAR selection process.
3) Go to Project -> Properties -> Java Build Path -> Order and Export.
4) Put a tick mark in the check box against this library name and press OK.
5) Do Project -> Clean.

if your giving google-Play-Service-lib as a references to your project , try to keep your project and the Google-play services lib should be in same drive.
if your project is on C: drive means place Google-play-services-lib in C:

While making the copy of the entire folder libproject containing google-play-services_lib from eclipse import project by selecting the copied libproject folder in your working place.
For the rest follow the steps in Setting Up Google Play Services

Eclipse
Copy the library project at
<android-sdk>/extras/google/google_play_services/libproject/google-play-services_lib/
to the location where you maintain your Android app projects.
Import the library project into your Eclipse workspace. Click
File > Import, select Android > Existing Android Code into Workspace
and browse to the copy of the library project to import it.
After you've added the Google Play services library as a dependency for your app project, open your app's manifest file and add the following tag as a child of the <application> element:
< meta-data android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
Android Studio
Open the build.gradle file inside your application module directory.
Add a new build rule under dependencies for the latest version of play-services
eg
...
dependencies {
compile 'com.google.android.gms:play-services:9.2.0'
}
apply plugin: 'com.android.application'
Source developers.google.com

Adding library project to PagerSlidingTabStrip

I'm trying to use
Android PagerSlidingTabStrip v1.0.1library
in my project but, after I import the project as existing code in work space I get to project
the Mainactivity and library and and the library is a dependency to the Mainactivity
but it seems that library project doesn't recognized as local library
so what i did is
1- I tried to make a jar file called library.jar from the library project
and I imported as a external jar so that fixed my import but when I try to use PagerSlidingTabStrip object it says missing reference
and beside that there is res folder couldn't be loaded .
2- I follow this How to add a Library Project to a android project
and I did like what the accepted answer said but it still didn't work for me .
This is how I added the library project
That what I got in project libraries
I tried to use this dependency in build.gradle
dependencies {
compile 'com.astuetz:pagerslidingtabstrip:1.0.1'
}
but it didn't work
i added before sherlock to eclipse so when i added it inside the root folder
a bin folder created and inside it there are a jar file and that's
doesn't happen with library so i think here is the problem
any help?

From properties window select option android scroll down, below library heading click the add button and select library project.

I was facing the same issue but soon i came to know that there was support library missing from Library project.
Add support library and clean build the library project and then add it in your project

Do the following:
File->New->Other
Select Android Project
Select "Create Project from existing source"
Click "Browse..." button and navigate to "PagerSlidingTabStrip-master" folder which you have downloaded from https://github.com/astuetz/PagerSlidingTabStrip
Check "library"! (Uncheck "sample"). Make sure "Copy to Workspace" is checked as well.
Click Finish. Now "library" is project in your workspace.
Right-click on your project -> Properties
In Android -> Library section, click "Add"
Select recently added "library" project, click Ok and you're all set.

Project library not getting added to android project

Iam trying to reference a Android project library to my application. I do this:-
1)File->Import->General->Existing project into workspace->Select project library->check copy to workspace.
2)Right click on project->Properties->Android-> Add-> Select project library-> Apply-> ok.
But when I again check if the library is added I get the following:-
How do I resolve this?

Make sure that your library has the same location with your project source files.
It means that if your source is on your workspace , then your library should add into workspace. If not, you should copy your lib into same folder with source then mount it again.

Make sure the library project is checked as a library.
Go to the library projects BuildConfig -> Android -> Check "is library"
Make sure your project and the library project have the same target/min SDK versions.
It's also a good idea to clean your workspace and Build the library project - Right click on library project -> "Build Project"

Try this answer:
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.
Reference:
In eclipse, unable to reference an android library project in another android project
Thanks to archie-bpgc for comment

i am also facing this problem i have solve this problem like
when import lib in to workspace tick mark as show in picture (basically library project and your project both are in same workspace)
now add lib to your project and clean project

you need to import the project to workspace and the library file into the same workspace.
Then you will not face this error. Kindly the root cause is not known. But this method works.
After all this .. one more way is you can alter the project properties last line where the library file path is specified.
Thank you.