Error: Android Library Project Cannot Be Launched

Hi Friends,
Today I got one error when try to run my android application in eclipse,
Error : Android library project cannot be launched.

So here is the solution to solve that error.

Solution:

• In Package Explorer, Right Click on Project > Properties
• Select Android from Properties pop up window
• See "Is Library" check box, if it is checked than Unchecked "Is Library" check box
• Click Apply and Ok.

The above solution worked for me. If you still encounter the problem write in comment for other solution.