@raynbow- If the cracked brick paver is securely set in your patio, it may be possible to apply mortar to the crack to see if it will set. This may be all you need to fix your problem.
Another crack repair option for fixing a brick paver is to simply remove the broken brick and replace it with a new one. This is usually very easy to do, especially if your pavers aren't attached with mortar. Just make sure you have a replacement brick handy, and put it in place as soon as you remove the broken one so the other pavers don't have time to shift out of place.