If you are using svn with android project then can get error “running builder ‘Android Pre Compiler’ on project”. The main cause of this error .svn file .
There are two possible ways to resolve this issue.
First :
Remove all .svn file before build.
Second:
Follow below steps to to fix “Errors running builder ‘Android Pre Compiler’ on project”"
Step 1: Open your project in eclipse IDE
Step 2: Open Android SDK Manager from window->Android SDK Manager
Step 3: In Android SDK Manager, Select Tools->options then open a window as screenshot, Check here Enable Preview Tools
Step 4: Click on close and select Tools(Preview Channel),Now install packages
Step 5: Now install ADT preview in eclipse,
Start Eclipse, then select Help > Install New Software.
Click the “Add” button, in the top-right corner.
In the Add Repository dialog that appears, enter “ADT Previews” for the Name and the following URL for the Location then click Ok.
Now try to build your project, I hope that issue will be resolved.