Eclipse - “main cannot be resolved or is not a field” (Android App programming)

Question

I've got a problem with Eclipse. I use the ADT to develop Android apps directly in Eclipse. But right after creating a new project, I got an error in my "MainActivity.java"-file.

I googled and everywhere its said that I have to import an ".R" class from my project folder, which didnt work for me. I also completetely redownloaded Eclipse+ADT in one package this morning.

The line which gives the error is the following:

setContentView(R.layout.main);

Without the "import com.example.myapp.R" statement I've got the same error. Cleaning and rebuilding also didnt have any effect.

Do you have any ideas? Thanks!

Answer 1

Try to type R r; in your code. Hover your mouse over the 'R' and Eclipse will say " R cannot be resolved to a type ". Click import R (com.example.myapp) . If this doesn't work then check for the folder gen to say Generated Java Files. Also check to see if they have the classes inside.

Answer 2

R.layout.main refers to a layout XML file in your "res/layout" directory. This seems like the layout file you are trying to reference is named something else. . You just need to make sure that your referencing the correct layout in your onCreate method.

setContentView(R.layout.activity_main);

Answer 3

Post the main.xml. Make sure you import your application's R file and not android.R. Restart eclipse, do a clean up by going to your menu Project-> Clean , refresh and tell us if it is fixed.