Eclipse bug - Error in my Android project's without real error

All of my Android proje开发者_开发问答cts have error sign now, but there is no error in the project. I didn't edit anything but there is an error sign by each project now. The sign appeared first by 3-4 projects only, I didn't edit absolutely any of my projects and the sign appears now by all my projects. What can this be and how could I resolve this - I don't want to rebuild my projects from the beginning, of course :) I already tried project->clean but I have again the error sign.

---

If you go to Window -> Show View -> Problems you can see exactly why the errors are there and take action accordingly. Usually, if there is no obvious error, cleaning your project can resolve the issue. However, there is clearly something else going on for you!

---

Try this

1) Right click on the project (in Project Explorer)

2) You should see Android tools towards the end. Click on it to get a list of options

3) Choose "Fix project properties"

Shash

---

Have you tried signing your application? Go through these steps and see what happens http://developer.android.com/guide/publishing/app-signing.html

---

go to Project>>Clean ..try this..