Develop Reference

R.java error "; " expected

I have tried to compile my project and then this error suddenly occurred. What could be the cause of this? can anyone please help me? error occurred in R.java file

This error occurs due to change in layout. May be you have to add a string in it.
e.g. android:layout_below="abc xyz ghi"

I just encountered this error, and it is definitely odd. I fixed it be renaming the ID's of several elements in my main activity layout. I had used hyphens in the names which resulted in this error. Changed them to underscores and all is well.

You can try to clean and rebuild you project. The R.java file should be recreated. And if this does not work you can try to find the missing ;.
I hope that solves the problem.

Just encountered the same error. Turns out that I have managed to enter ID value which included space into id field of a Button (and the IDE didn't protest). (Apparently I had clicked into bad field when trying to change text label.)

wamy project's R.java file is causing and error and when ever i fix it eclipse removes the changes i made

this is causing the error
public static final class id {
public static final int timeToSend=0x7f080021;
public static final int timeToSend,=0x7f080023;
}
whenever I remove the second and save the file eclipse changes it back. I tried changing it while eclipse is not running and yet when I opened eclipse it changed the file back. I don't have any duplicates in layout to cause the problem. I tried cleaning the project and it didn't work.
turns out I wrote android:layout_alignBottom="#+id/timeToSend," instead of android:layout_alignBottom="#+id/timeToSend" that's why it nade a duplicate with the comma. sorry for the trouble

Maybe it's because you have an XML element with the android:id="#+id/timeToSend," ?

Android ID's cannot have any special characters in them. So android:id="#+id/timeToSend, would be wrong due to the fact that it has a comma. All you have to do is find that ID and rename it.
It's not recommended to edit the R.java file because it generates itself based on all the ID's you have created. The only way to edit it is to get rid of the ID's that you have declared in XML, otherwise, every time you clean the project, they regenerate.

Something that I always try when R.java is giving me problems is rebuilding the project.
You should be able to find the option under Project and then Clean.
That's only if rebuilding it hasn't worked.
Good luck and I hope this helps!

Activity name could not be resolved after creating an activity in eclipse

I have just added an activity to my project (from the options) in eclipse called Dlg as a result a Dlg.java file was created along with a activity_dlg.xml. Also added the activity in the AndroidManifest.xml however eclipse has placed a small cross next to the Dlg.java file and activity_dlg has been underlined in
setContentView(R.layout.activity_dlg);
and it states activity_dlg cannot be resolved or is not a field. Why is this happening all of a sudden. I Added activites a while ago and they were fine.
Any suggestions ?

The "cannot be resolved or is not a field" error on the R class indicates that the changes you made (addition of the layout xml) is not reflected in the generated file. You can clean the project using menu Project -> Clean... to force re-generation of the R class.

It probably means that for whatever reason the R.java file, which is automatically generated, isn't generated or incomplete.
This usually means you have an error in your xml file.
Assuming that activity_dlg.xml actually exists, you probably have an error in there.
Maybe its referencing to an image or string which doesn't exists?
Open it up and check it carefully, not always does the xml reader underline errors.
If you can't find anything you can always try to clean your projects or restart eclipse, but that probably won't help.

I think the newly added activity_dlg.xml is not associated with an id in R.java file.
Confirm this by going to R.java. Under this you have something like:
public static final class layout {
public static final int activity_dlg=0x7f030000;//This is some id to your layout
}
If this is not present then u can right click on the project directory from eclipse and refresh. or Project->Clean to regenerate the R.java file.

Android : Error in R.java class

I am having a strange error that I can not resolve in class R.java in my android application
the error is in the following line
public static final class string {
public static final int =0x7f05002f;
because it has no variable after the int
can anyone help me please with this error ?

R.java is auto-generated, and is not meant to be edited manually.
If you face issues, delete R.java and rebuild your project and it will be generated again, according to your layout.
If problem persists, look into your xml files ( strings.xml, layout.xml, etc) for any errors.

check your strings.xml file.It seems like you have saved some value without assigning any name to that.
Look for an entry not having any name attribute. something like <string>8</string>, either remove that or assign a name attribute to that like <string name="anyname">8</string>

A bad R.java would mean an error somewhere else. If deleting it and rebuilding the projetc doesn't solve it look at your manifest and other xml resources for errors.

Type R is already defined error

How do I fix this? I already tried removing the R.java and cleaning the project via eclipse, but it doesn't help.
FYI I am trying to get PhotoStream from here: http://code.google.com/p/apps-for-android/, but so far it has been very difficult to get things work.

Okay..... 5 mins later google tells me the correct answer...
http://www.fairtec.at/en/it-blog-mainmenu-16/168-the-type-r-is-already-defined
I just didnt search hard enough.
"The type R is already defined"
That's the message you get in Eclipse if you try to build the Funambol Android Sync Client.
Reason is that you have checked two Builders that try to generate the same class.
You just have to uncheck the Java-Builder from Project->Properties->Builders.
Then the application even works fine in the Emulator.

Delete the R.java from the src folder and rebuild the project. This file will be automatically rebuit during this process.

http://www.fairtec.at/en/it-blog-mainmenu-16/168-the-type-r-is-already-defined
click right to project click properties
Project->Properties->Builders.
unckeck java Builder
delete file R.java

You may want to change your package names. It looks like you are using a 'PhotoStream'.jar which has it's R.class defined at the same package structure as you.
Here is a link to the R.java from the project on Google Code. Notice you are using the same package:
http://code.google.com/p/apps-for-android/source/browse/trunk/Photostream/src/com/google/android/photostream/R.java?r=83

I had the same issue when I imported a project from work. Turning off the Java builder as suggested in the article you found fixed my problem, but when I made code updates they were not reflected in the running app. In my case there was an R.java in my source which I deleted and that fixed my problem.

In my case,
as i m not using any IDE for programming but using command line Android..
i had two xml files, one in layout and other in layout-land. i was using same id "XXX" for both but while declaring i made small mistake
android:id="#+id/XXX" (in layout xml)
android:id="#+id/XXX " (in layout-land xml)
please observe extra space in second id declaration, so while creating R.java they were different and in R.java i had
public static final int XXX=0x7f040046;
public static final int XXX =0x7f040045;
which are same, so please be aware of extra spaces. Thank you