Compare tools for Android Application testing between Appium and MonkeyTalk

I'm brand new to Mobile application automation. So, I did a research for selecting a good automation tool for test Android applications.

I need a tool with following requirements

• Functional testing
• UI testing for different devices, different Android versions
• Can write scripts using Java

According to my reading Appium is the best option for functional testing. Can someone give a comment about the best testing tool to cover both functional and UI testing.

Thanks in advance. :)