Android :: Android Adding External Libraries To Project
Apr 3, 2010
I have a project that I would like to add external libraries to (and have them packaged with the application) but I am not sure it is happening. I read on this link:
http://developer.android.com/intl/fr/guide/appendix/faq/commontasks.html. how to, but they do not show up in any of the /data/data/project directories. Does anyone know how I can confirm that the libraries were in fact added to the project for use at runtime?
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Apr 10, 2010
I have created a folder in my project with the weka.jar file, created a new library (adding the weka.jar file to the library) and included this library in my build path. I have also added the library under the "Order and Export" tab in the project properties. I have also tried importing the jar file so that the actual contents of the jar are extracted into a directory in my project. The end result of all of this is that my project is able to build correctly and without error, but when it comes time to run my code on the emulator I get the following exception:
04-10 22:52:21.051: ERROR/dalvikvm(582): Could not find class 'weka.classifiers.trees.J48', referenced from method edu.usc.student.composure.classifier.GaitClassifierImpl. with J48 being the class I reference in my code. Does anyone have any additional suggestions that I may have overlooked?
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Mar 7, 2010
I'm new to Java/Eclipse/Android, so this is probably an easy (if not stupid) question:
After creating a new Android project, I want to import some (what I think are standard) Java libraries. However, some import statements throw an error:
HelloAndroid.java:
import java.awt.Color; (The import java.awt.Color cannot be resolved)
import javax.imageio.ImageIO; (The import javax.imageio cannot be resolved)
while others don't:
import java.io.File; (no error)
I've done some googling and tried to add these classes to my class path by going to project->properties->libraries but I haven't been able to figure out what to do exactly.
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Nov 22, 2010
The Three20 project is really nice for building iPhone apps quickly using common libraries:
https://github.com/facebook/three20
Is there anything like this for Android?
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Aug 10, 2010
I am building an app that scrapes information from web pages. To do that I have chosen to use an HTML scraper called J soup because it's so simple to use. Jsoup is also dependent on Apache Commons Lang library. (Together they make up a total of 385kB ). So Jsoup will be used to Download the page and parse it. My question is if the use of these simplifying libraries, instead of using Androids built-in libraries, will make my app slower? (in terms of downloading data and parsing). I was thinking that the internal libraries would be optimized for Android.
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Oct 9, 2010
As I am very pissed off of using the emulator to develop any Java class, I thought of setting up a project in Eclipse and instead of the usual JRE I linked to the Android.jar (version 2.1) that usually the Android projects link to. I don't mean to use this to develop Layouts or other specific platform things, I was just trying to create a class that uses HttpClient.
It miserably crashes like this.
CODE:.............
I mean I'd like to develop libraries (and test them) so that when I go to the emulator I don't have to deal with them. Is there a good way to do this? This seems not to work for some reason.
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Aug 6, 2010
I'm trying to build a project in Android 1.5 that references another Android (library) project compiled against Android 1.5 and I keep seeing this error in the Console in Eclipse:
Target 'Android 1.5' does not support building project with libraries.
I'm running Eclipse 3.5, and version 0.9.7 of the ADT.
I followed the instructions here:
http://developer.android.com/guide/developing/eclipse-adt.html
What gives?
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Jun 21, 2010
I have a few already written C libraries which i want to embed into the library layer of the android architecture at the same level as the already existing libraries such as libc etc.... i dont want to insert it as .jar packages at the application or framework layer. is that possible.
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Sep 1, 2010
I'm trying to use the JJIL libraries with my Android project:
http://code.google.com/p/jjil/
I followed all the instructions on importing libraries into eclipse on the android guides, and have had no successes. It just fails to import.
Can some one point me in the right direction with this?
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Aug 9, 2010
Will external library (for parsing JSON) work on 1.5 if it works on 2.1? So are libraries limited by android version? If yes, why?
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Jul 10, 2010
I'm trying to build an Android project that has some dependencies. The jar files are in the lib/ directory. I can build the project by adding those jar file to my class path, but of course it Force Closes in the emulator because those libraries aren't present. I'm doing this from the command line with ant (not in eclipse). How can I make it include those libraries in the apk from the command line?
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Jan 13, 2010
I need to create an Android library which I can include as a jar in any Android application. I use NetBeans 6.8, the nbandroid plugin, and the Android SDK.The steps I took so far are:
1) Create the library project, with android.jar included to have access to Android classes (the library uses android.util.Log and other Android classes).
2) Compile the library as a jar.
3) Add the library's jar to the Android application (right-click on Libraries under the project node and add the jar).
4) Add <uses-library> to the Android manifest. (erroneous and unnecessary)
Step 3 at least allows me to reference the library's classes in the application's source code, but the classes don't seem to actually be included at compile time.Do I have to add the library to the build path somewhere else? Am I missing something?
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May 2, 2010
I'm trying to develop an external library (not sure if that's the right term) to provide prepackaged functionality in Android projects. Working in Eclipse, I've added the appropriate android.jar file to the build path, and everything is happy both while editing and upon compilation.However, when I use Android's Handler and Message classes (android.os.Handler, android.os.Message) for inter-thread communication, I get exceptions unless I'm running within an Android app, on the emulator or a device. I can no longer test my library in a "standalone" way without having to go through a running Android target.Is there any way for me to include these two Android classes and still be able to test my library standalone? Do I need to have the Android source available? Or would it require some sort of conditional compilation hand-waving?
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Feb 17, 2010
I am working on mapactivity.map.jar file in sdkadd-ons path.how to add it in my project?
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Sep 24, 2009
I have a few pre-compiled static libraries,*.a files.How to add them in Android.mk file?Finally i have to get a .so file.What changes should i make in Android.mk? Please respond.
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Mar 17, 2010
I have an existing project that builds fine using my IDE.I'd like to use the "android update" command to generate an ant buildfile for this project.The buildfile is generated fine, but the build fails because it's not building with some jarfiles I have in my libs directory.I'd like to figure out the proper way to tell ant to build with some external jar files in my libs directory. How should I do this? Is it a property in build.properties? Do I need to modify build.xml somehow? Or is there a different solution entirely?
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Sep 13, 2010
I have a workspace with a few projects in it. App1 and App2 are Android applications. Common is an Android library project. App1 and App2 depend upon Common (linked via the Android tab). Common has some external dependencies, namely httpmime & apache-mime4j, which exist as jar files. For some reason, it appears that I need to add my mime jars to the build path of App1 and App2 for compilation to succeed. This seems really dumb. In normal Java, I would add Common to the build path of App1 and App2 and things would work. Is this expected that I have to add my jars to every Android application?
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Sep 10, 2010
We are making an application that needs to convert one file format to another. I am not sure whether we can add a JAR file in which we develop the code to convert the file format to our required file format, to our android project.
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Jul 4, 2010
I'm developing an application that is supposed to run on both Android as well as regular Java SE. I have an eclipse project called foobar-core which contains code that is used both by the Android and the SE version. I have another project called foobar-android, which contains all android-specific code. I need to reference some of the foobar-core code in the foobar-android project, so I added foobar-core to foobar-android in Settings -> Java Build path -> Projects -> Required projects on the build path. This works fine, as I can use code from foobare-core in foobar-android now.
Here's the problem: Both foobar-core and foobar-android are independent git repositories, which means they both have a .git subdirectory. Now I get a lot of warnings on the "Console" tab whenever I compile foobar-android. They look like this:
/foobar-core/src/.git/HEAD conflicts with another file already put at .git/HEAD
/foobar-core/src/.git/config conflicts with another file already put at .git/config
/foobar-core/src/.git/description conflicts with another file already put at > .git/description
/foobar-core/src/.git/hooks/applypatch-msg.sample conflicts with another file already > put at .git/hooks/applypatch-msg.sample
How can I tell Eclipse to ignore the .git files when importing sources from the foobar-core project?
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Sep 4, 2010
This is a two-part question about adding a third-party library (JAR) to an Android project in Eclipse. The first part of the question is, when I try to add a third-party JAR (library) to my Android project I first get the problem of Error parsing XML: unbound prefix
because I'm trying to use a class from that JAR (and need the prefix somehow defined). What's going on?Second, (after fixing that--the answer is given below), my application doesn't work on Android and I discover via the debugger (LogCat) that the class I'm attempting to consume doesn't exist.
Caused by:
java.lang.ClassNotFoundException:
com.github.droidfu.widgets.WebImageView...
Why, when I get no compilation or linker error in Eclipse, does it have this problem on the emulator? These two questions are rhetorical for I'm going to answer them myself below. Other posts in this forum creep up to the problem and elsewhere there is discussion, but I feel that I can be more explicitly helpful for the next guy to come along.
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Jul 18, 2010
I'm clearly missing something simple, but after nearly an hour of trying to figure it out, I'm still stuck.
I have an external jar file containing classes I want to use in my project. No problem, right? I just followed the instructions at
That is, I used the Properties->Java Build Path->Libraries panel to add the jar to my project as a library. But it doesn't work. The external library is being included in the compilation classpath, so everything compiles correctly, but the external classes aren't actually getting included in the apk. When I try to run my app, it immediately crashes with a java.lang.NoClassDefFoundError. And looking at the apk, I see it's only 20K, whereas the external library jar is over 200K.
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Aug 24, 2010
I'm starting with android, and the app I'm developing is gonna need custom widgets look (glossy buttons, animated backgrounds etc.),I've googled for any external libraries to achieve this and did not find anything. let me guess, the only way to this is by painly extending base view classes and overriding onDraw etc?
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May 3, 2010
I am building an app on android and running into an error and while searching on net, came across your posting on this and changed the eclipse.ini to increase Xms and Xmx params but still this error does not go away. I am using Eclipse IDE for Java with Andrioid SDK 2.1 on Mac OS. Please help or please point me to someone who might know. Btw, this error only happens when i add external jar files (which i need for my project). here are the list of external jar files that i have in my classpath.)
// httpclient-4.0.1.jar from apache
// httpcore -4.0.1.jarfrom apache
// commons-codec-1.3.jar from apache
//commons-logging-1.1.1.jar from apache
// json_simple-1.1.jar from google ........
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Aug 27, 2010
I've moved some of my common code into a library project so that multiple projects can access it. I created an empty project, set it to be a library in the properties screen, then imported some classes. Next, I created a new (non library) project and added my new library project to it. Immediately upon rebuild, I get the following error: ERROR: Unknown option '--auto-add-overlay' Android Asset Packaging Tool
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Apr 22, 2010
I've read various answers to similar questions on StackOverflow, so I apologise if I'm repeating another question, but I can't seem to get this to work.
I have a standard java project in which I've written code to parse some BBC Radio XML data from the internet. The project is called BBCSchedules and the class I'm interested in is called BBCChannel.
I'm now trying to use the BBCChannel class in an android application. How should I go about doing this?
I've tried various things, following various bits of advice on the internet, and the place I've got to at the moment is compiling my BBCSchedules project to a .jar file, and importing that to the Android project using the Build Path/Library/Add External Jar option. However, Eclispe still doesn't recognise the BBCChannel class, and won't let me run the application because of this.
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Mar 21, 2010
Somethings I'll have an? .xml file selected when I compile a project, only to have a? .out.xml generated. Deleting the file doesn't clear the error, and Eclipse won't compile the project. It just reports that your project contains errors. The solution is to go to Project/Clean. This will clear the error in the project and allow it to compile.
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Aug 11, 2010
I can now get our Android project to talk to our non-Android project. But there's still an issue: I are trying to have an Android class call a non Android Hello World class. I tried compiling our non-Android Hello World class in a separate Eclipse workspace. I then packaged it into a jar. I imported that jar into our Android Hello World class.
I then called one of the methods in the non-Android Hello World class. When I ran the Android Hello World class as an Android application, the following runtime error occurred. Here are the Android debug logs:
08-11 09:07:56.764: ERROR/AndroidRuntime(333): FATAL EXCEPTION: main
08-11 09:07:56.764: ERROR/AndroidRuntime(333): java.lang.ExceptionInInitializerError
08-11 09:07:56.764: ERROR/AndroidRuntime(333): at com.hello2.hello2.onCreate(hello2.java:27)
08-11 09:07:56.764: ERROR/AndroidRuntime(333): at android.app.Instrumentation.callActivityOnCreate(I nstrumentation.java:1047).....................
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Aug 8, 2010
I followed the instructions here on how to create an Android library project, and use it in an Android application:
http://developer.android.com/guide/developing/eclipse-adt.html
But it is not working. I can see the library project is added to my application but I cannot reference anything in it because it won't build. The R.java file from the lib is NOT being added to my application project, so the lib project contains tons of errors, everywhere it tries to reference it's own R.java file.
I don't know if this has anything to do with it, but in the console there are messages stating that the there is "No resource identifier found for attribute 'X' in package 'Lib Package'. My library package has a a few styleable attributes defined for a custom view I made, all of which are being complained about in this console message. The library builds just fine, and I don't get those messages in the console until I hook the library to my application, so I don't know what's up with this.
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Jun 6, 2010
I have 2 android projects out of which I modified one to work as a library. I want the main project to refer to this library to perform few functions. While this scenario works just as expected, I want to introduce one more functionality. I want to link this library project with another just a java project which has code common to both Android and Blackberry applications. This second part however doesn't seem to work and throws "The application <appname> (<package name>) has stopped unexpectedly. Please try again" with a ForceClose button. I would greatly appreciate if someone can give a brief information on how to make this work.
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Jan 25, 2010
I am a C# developer and getting started with Android. I am attempting to duplicate a couple applications I already have in VS. The project is made of 2 executables and 1 common assembly. The 2 executables contain the application specific logic while the common contains centralized forms and logic (such as login form). I am using Eclipse. So how can I accomplish this layout?
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