3 common issues.

1. Eclipse in
Android.
3 common issues.

2. Android manifest file is missing
1.Delete the project.
2.Start to create the same project and be very
careful to not make the same mistake.

3. No grammar constraints(DTD or XML
schema) detected for the document.
1. Click Window> Preference>XML>XML files>
Validation.
2. Change the setting’validating files’>’No
grammar specified’ from warning to ignore.
3. Re-validate your project. No more warnings
now.

4. R.layout.main can not be found...
1.If you check in your source code you will
realize that you did not import Android.R.
2.Do it!