This is the detailed version of what happened. Please have a little patience and read this. I think my problem is unique.
Initially I had installed Eclipse and followed all procedures and was happily coding my first app. One fine day I fired up the SDK manager and saw the Android Tools had a new update. I tried to install the package. Then may be due to my slow net, something went wrong and Eclipse didn't work at all. It said there was something wrong in some file as an error message.
So I installed Eclipse again and followed all procedures. The address of the workspace and the Android SDK was kept same so that my projects will be automatically imported. But now Eclipse is underlining the R or Resource references in my src files. I do not know what to do.
Did you try opening the sample project that is shipped with andoid SDK? If even that one has the problrm, I think you must update ADT plug-in. Updating SDK and not ADT plug-in caused the problem for me. Once I updated ADT plug-in, everything worked fine.
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I have downloaded ADT Plugin for Eclipse. I don't see Android anywhere either when creating a new project, Preferences or "Customize perspective"
I have searched for the answer but I couldn't find it. The only thing that I didn't try is opening "command group availability" tab mentioned in forum not showing Android And AVD manager in eclipse because I can't see it at my setup.
I'm using Eclipse Neon.2 with JDK jdk1.8.0_121. I didn't add a PATH variable in my system. Not sure if I have to or not.
Android ADT doesn't seem to work for me in Neon too (same errors and long time search on startup without results)
There is a new Eclipse Android dedicated IDE now at https://eclipse.org/downloads/packages/eclipse-android-developers-includes-incubating-components/neon2 Must be installed in a separate folder with separate workspace (and renamed if needed) and all existing Android projects can be moved there. Afterwards i uninstalled ADT from the original Eclipse folder.
There is Installation Instructions for Google Plugin for Eclipse 4.6 (Neon)
https://developers.google.com/eclipse/docs/install-eclipse-4.6
It appears that either Eclipse Neon.2 stopped supporting ADT or that it has issues with it. I went back to Eclipse Neon.1 and I can find Android references all over, so I think the issue is something to do with Eclipse Neon.2.
Thanks to all of you who tried to help.
UPDATE:
It appears that for Neon.2 there is a separate package for Android that you can find here:
http://www.eclipse.org/downloads/packages/eclipse-android-developers-includes-incubating-components/neon2
I have a problem with creating Android Application project in Eclipse on my Mac. When I start Android Application Project Wizard after clicking "finish" in the last step, this window appears:
I've been trying to solve this for hours, but none of the solutions I've found on the internet worked for me (including this). I didn't try to reinstall eclipse itself, but to I don't want to do this. What's the solution to my problem.
UPDATE:
I removed Eclipse and sdk from my computer and downloaded the whole ADT Bundle from here and switched workspace but actually I am still getting the same Errors.
What I found up on the internet was that you could have upgraded your java. So this occurred. The solution to this problem for Mac is to edit the Eclipse.ini file to use java 1.6 .The code Below will work :
-vm/System/Library/Frameworks/JavaVM.framework/Versions/1.6.0/Commands/java
Start with a clean slate. Unistall Eclipse and redownload - Eclipse is a very big program and can be very buggy at times for no reason. While it is not the quickest solution, ensuring that Eclipse was properly downloaded and installed will provide a good foundation for the future development of you Android applications. Did you install Eclipse just for Android, or did you have a pre-existing copy and want to install the Android SDK?
I am a new Android developer (4 weeks into porting my iPhone app to Android). I have 8 projects (the app, and 6 small UI experiments, and a vanilla Hello World project that I just created with Eclipse). All fail to compile, and the issue is that every reference to the generated file R is flagged as "R cannot be resolved to a variable".
Up until yesterday afternoon -- every project compiled and ran (albeit very slowly) in the Android emulator. I've changed something, and since yesterday, all projects fail to compile, all in the exact same manner "R cannot be resolved to a variable". I every case, the generated files are missing. I believe they disappeared as I tried to clean and rebuild each project in the course of debugging this problem.
Two things that I know changed when this problem started, but that I can't say caused the problem, were: 1) shifting to debugging on a real Android device (a Samsung Galaxy Tab 2, which worked like a champ after struggling with the slow emulators), and 2) allowing Android (and perhaps Eclipse) to update themselves from the web.
I've spent many hours trying other user's suggestions and none have helped. Most suggestions refer to file naming issues, xml syntax errors, but I haven't changed these files and filenames since compilation was working. I have tried:
cleaning and rebuilding the projects
checking for subsequent updates to the Android SDK (and there were 2 subsequent ones)
Eclipse->File->Android Tools->Fix Project Properties
making small source changes to force rebuilding
rebooting Eclipse, as well as the Mac host, adb, the emulator, the Android SDK Manager
deleting a project, restarting Eclipse, and adding the project back in (bad idea - this fails with an error "Failed to load properties file for project 'ListViewFragmentTest'"
creating a brand new Android App project, which has worked many times before, but now fails
There's something going systematically wrong, and while I won't claim all these projects are bug-free, they did run up until 6pm yesterday, and then all stopped compiling thereafter.
I wonder if anyone has other suggestions, before I embarking with a complete reinstall of the development environment?
My environment is:
Macbook Pro (OS X 10.7.5, 8GB RAM, 2.53GHx Core i5)
Eclipse (Indigo Service Release 2, Build: 20120216-1857) (too old?)
Android SDK Manager Rev 22
Android SDK Tools (22), Platform Tools (17), Build Tools (17)
API's 11-17, all up-to-date
Seems like lots of people experience trouble with missing generated files (R), and I have had trouble when I've had layout XML errors as well, but that doesn't seem to be causing this problem. Thanks in advance for your help!
I am not sure but you are facing issue of R.java file is not getting generated after updated with ADT rev 22.
If this is the case then here is the solution:
Hope you know Android studio has gradle building tool. Same as in eclipse they have given new component in the Tools folder called Android SDK Build-tools that needs to be installed. Open the Android SDK Manager, select the newly added build tools, install it, restart the SDK Manager after the update.
Check in the Java build path library, whether "src" check box is checked or not.
If you are using any additional Libraries then make sure libs/android-support-v4.jar is same for project as well as the Libraries.
Thanks everyone. None of these suggestions resolved my problem. And while I'm curious as to why it happened, I was more impatient with not making any progress. I've reloaded Eclipse and the Android tools (this time with the bundled version from developer.android.com), and everything is working smoothly again.
I just updated eclipse and the Android Developer Tools plugin and now when I make a new project and try to run as android application, I get an error: "Your project contains error(s), please fix them before running your application". There is no visual errors (red x on the file name ). I have made several simple projects in the past with success. So I uninstalled eclipse and followed a couple tutorials step by step on setting up an Android developer environment with Eclipse Helios, Ganymede, Indigo with no success.
Does anyone have any idea what the problem could be?
thanks in advance.
EDIT
Thanks for the quick response. I did figure out the problem. Before the problem occurred, I had re-downloaded the android SDK changed the path. But then forgot to install a platform in the new environment.
A common error is that there is a space in the Android toolkit filepath. Make sure it is in a location like "C:/android/android-sdk" rather than something with spaces in it.
Give this a try, and if it doesn't work, please post the actual errors you are receiving.
EDIT:
This has apparently been fixed since r13 of the SDK tools, though it may still be an issue for older versions.
After several years with Eclipse and Android development this combination is driving me nuts.
On every start of Eclipse the lib settings I've configured on the page 'Project/Properties/Android' section 'Lib' need to be re-applied.
After a Eclipse restart all existing projects are marked in red. For every project I have to select that project, change to the page described above, remove all Libs, hit Apply, re-enter the same Libs and hit apply again. .classpath and .project look ok. It's the latest Android SDK and the latest Helios Eclipse release. MotoDEV is installed as plugin.
This is a stupid and time-consuming process. Please, has anybody an idea what's wrong with Eclipse (or the Android SDK) or my configuration?
Many thanks in advance.
Which OS are you using and is it 32- or 64-bit? Are you logged in as root/administrator or as a regular user? This sounds suspiciously like the ~/.eclipse folder isn't getting written correctly. We can look at this in MOTODEV Studio and see if it's something unique to us, but it definitely is strange behavior.
Update: one of the MOTODEV Studio team says this is a known bug in ADT when using linked folders. http://code.google.com/p/android/issues/detail?id=14217