Android :: Missing Gen Folder When Clean The Eclipse Temporarily Destroys Project
Sep 29, 2010
I am experiencing an annoying problem with an Android project in Eclipse. All my other Android projects are okey (at the moment). Whenever I perform a clean (Menu:Project->Clean...) the project gives an error and I can't compile/run the app. The error is: Project 'Project Name' is missing required source folder: 'gen'
As soon as I edit some code the problem disappears until I perform a clean again. I can also right-click on the gen-folder and delete it. Eclipse will recreate the gen-folder and the problem disappears until I perform a clean. This is not a showstopper but it is really annoying since I sometimes have to do a clean before I run the app.
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Mar 31, 2010
Whenever I do a Clean on my project, I get 2 errors:
1.) The project is missing gen folder.
2.) There is a build path error.
I go to "Configure build path" and uncheck "Android 1.6". It works. If I do this again, I go and this time check "Android 1.6". It again works.
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Jun 9, 2010
I'm just getting started developing for Android and I'm running into a weird problem.
First off, I'm running Eclipse for Java devs v3.5.2 with the Android 2.1 SDK installed.
Basically, whenever I do just about anything the "gen" (R.java, etc.) folder will just disappear from the project. I'm seen some people online say that it was still on the drive, just gone from the project listing in Eclipse, but in my case it is literally and completely gone.
The only fix I've found is that if I refresh, then try to build, it gives an error and "gen" shows up in the project view (though it's not on the disk), then delete it from within the project, then Rebuild All and it will say that it cannot find it and is recreating it.
Problem is, I have to do this every single time I want to build.
There's got to be a fix for this.
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Sep 21, 2010
I configured a new machine and am trying to move my Android project over. When I look at the project properties under Java Build Path- >Libraries, on the old machine I see a reference to "Android 1.5" but project is missing Android jar.
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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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Oct 9, 2010
After I added some .png files into my Project Workspace drawable folder I refreshed my drawable folders in Eclipse and the newly added files showed up. But when I tried to access those resources using R.drawable.xyzimage, xyzimage although in the folder could not be resolved. So I did a Project Clean and guess what after this clean R.java is totally gone and all my classes accessing resources using R.java is showing all sorts of error and Eclipse won't let me run the code anymore. I have backup of my source code but I want to explore if R.java can be regenerated and how?
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Nov 24, 2010
I've noticed a somewhat bothersome issue with the root folder of my phone's internal SD card. Perhaps it's lazy coding, perhaps I've missed a setting somewhere, but the root seems swamped with various folders by different applications. Is there no Application Data folder for these, using Windows terms?
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May 1, 2010
Quick App Clean Cache. Any one else notice this is now missing from the Market? I'm assuming its due to the fact its copy protected but now its unpurchasable. Any one know another location it can be found? I wanted to buy this but should have done it before updating to 2.1 v3.
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May 16, 2010
I'm looking for a settings file that is customized for Android development, can you point to any?
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Jan 3, 2010
I am new to Android Development. Actually i am iphone developer and i am learning android developer. I installed android and eclipse and i run one project successfully.Now problem is that after creating project, it doesn't appear in eclipse. So can anyone plz tell me that how can i open project into eclipse.
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Jan 23, 2010
I'm completely new to Eclipse/Java/Android programming, so this might sound like a dumb question, but I can't open the project I was working on last week. it's the "HelloWorld" project.I'm very familiar with Visual Studio so I've been looking for something like a project file/solution or a way to open a directory in Exlipse, but I'm having no luck and am completely lost.
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Aug 1, 2010
I tried to build test library and test app with latest ADT and Eclispe however Eclipse complains on each reference I made to library classes from my test app. This is what I did:
1. created Test Library Android project, marked it as "Library" (package name "test.library.lib") 2. created Test App project (package "test.library.app") and set it to use Test Library 3. Test Library got LibActivity class which simply referes to lib_main.xml layout 4. I defined that activity in Test App manifest file:.............
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Oct 7, 2010
I have an android project that uses ant to build, is it possible to import this ant project in eclipse IDE?
update : There is an option to create project using ant build.xml in eclipse File->New->Project->Java->Java project from existing ant Buildfile. and if the build.xml file is selected it show error "Specified buildfile does not contain a javac task"
I guess javac is declared in this task
<taskdef name="setup"
classname="com.android.ant.SetupTask"
classpathref="android.antlibs"/>
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Sep 5, 2011
I wanted to start a new android project in Eclipse but it is not showing up when i choose file > new. I can't see any option to create android project there. And I also have android SDK too
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May 2, 2014
I want to start a new android project in Eclipse but it is not showing up when i choose file > new. I also checked file > new > other. I can't see any option to create android project.
I'm completely new to Android development (but not to programming as such). I'm following the tutorial at Android Developers and got stumped immediately.
I've installed Eclipse and the Android SDK
adt-bundle-windows-x86_64-20131030
eclipse-standard-kepler-SR1-win32-x86_64
jdk-7u51-windows-x64.exe
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Oct 29, 2012
I cant find "Android Project" when i go to eclipse>file>new>other>android>android project
"Android Project" is not there
While every person on youtube seems to have this
GT-I9100
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Apr 17, 2009
How do you open an existing Eclipse Project?I don't see an open button or a way to load an existing project.
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Aug 8, 2010
I forget to select the .java file before running an android app from Eclipse. I have a .xml selected, press Run and the projectfile breaks.
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Oct 7, 2010
I would like to run a custom shell script upon clicking Build Project in Eclipse. I tried modifying the "compile" section in build.xml, but my script is not getting run. Invoking ant debug on the commandline works, however.
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Mar 30, 2010
When I create a subfolder in the layout folder, and drag an xml file to it, the generated R file doesn't seem to show the subfolder. a) is there a way to change that b) is the file and file structure still picked up by SVN and c) so, if I do it that way, can I still just refer to the object using layout?
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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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Sep 6, 2010
I am trying to create a library project, I've got things working up to the point of building the application that depends on the library, but installing the APK on the emulator always fails, because the shared library is not there. (The documentation indicates that the ADT would include the library in the APK of the dependant application, but this is clearly not happening.) BTW, I'm using the package name of my library project in the application's "uses library" tag. Is this correct? The documentation is completely silent on this subject. I've been banging my head against this for two days nowanyone has gotten a library project to actually work.
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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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Feb 19, 2009
I've noticed that then I use "clean" from Eclipse project menu on my project I receive following error
[2009-02-19 09:55:02 - MyListView] no classfiles specified [2009-02-19 09:55:02 - MyListView] Conversion to Dalvik format failed with error 1
Project doesn't use any external jars and rather simple. If I uncheck build automatically and build it - it builds and runs just fine. I'm on MacOSX 10.5.6 and JDK 1.6.0_07. And latest android SDK ( android-sdk-mac_x86-1.1_r1.zip 79046151 bytes becf0f1763d61eedce15d2a903d6c1dd )
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Sep 3, 2010
While compiling android project in eclipse 3.4.2, am getting The project cannot be built until the build path errors are resolved. I got a temporary solution from the blog http://www.scottdstrader.com/blog/ether_archives/000921.html
The resolution was to force a resave of the selected projects (and their .classpath files):
Open the project properties
Select Java Build Path > Libraries
Add a new, arbitrary library (to be deleted later) > OK
Wait for the workspace to refresh (or force a refresh of the project)
The error(s) will go away
Remove the dummy library
The only other references I could find were to make minor alterations of contents of the .classpath file.
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Mar 20, 2010
Is there an example Hello Sound project for Android that will show how to create beep sounds of a variable tone and duration?
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Sep 21, 2010
I had a project working in Eclipse completely, but after compiling it with ant in order to use Proguard to obfuscate the code the entire project fell apart. The project consists of a single package containing two main activities and 4 helper classes to handle databases and such. After using ant the activities work fine but Eclipse cannot find the helper classes and won't build. Even if I explicitly import the classes the error I get is
The import com.ts.routeTracking.DataHelper cannot be resolved while further mentions of the class get the error DataHelper cannot be resolved to a type. How can I get Eclipse and ant to work together?
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Nov 10, 2010
I got the following error on error log,"conversion to dalvik format failed with error 1" How to resolve this issue?
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Jul 2, 2009
I've tried checking out some projects to get them to run in eclipse -- for example twitta from:
http://twitta.googlecode.com/svn/trunk/
using subclipse plugin for eclipse.
It happens on other projects as well. When I checkout the project, it's not recognized as an android project (the src folder is not identified as a java source folder, etc.)
Anyway, when I try to run "convert to android project" from the context menu, I see
Problem Occurred
'Convert Project' has encountered a problem. twitta does not exist
The details text area is blank.
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Aug 25, 2012
when i enter to eclipse new>other>android i have many options but not android project,i have insalled sdk and the plugins,what sould i do?
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