R.java file not generated automatically Eclipse [duplicate]

Question

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Developing for Android in Eclipse: R.java not generating

I cleaned my project and changed my project files name.I am getting "R cannot be resolved to a variable".When i clean the project nothing happens and my /gen/ folder is still empty.I was trying to show u guys an image of the situation but unfortunately i cant due to my low reputation. I hope this can be helpful.

Answer 1

Typically if the R .* can not be generate means that you have some issue into the res/ folder. Check for errors in res/ folder.

Invalid file name: must contain only [a-z0-9_.]

all the res/* filename should be named with lowercase character, underscore and number between 0 and 9

Answer 2

The problem is that your layout files contain uppercase letters, which is prohibited. You can use only lowercase letters and the "_" symbol (not sure about numbers). Change the filenames and clean your project. Hope this helps.

Answer 3

Did you rename your Application Package? To do that, right-click your prject in the "Package Explorer" and expand "Android Tools" then click "Rename Application Package".