找到一个特定的正则表达式单词并链接以在android中打开一个活动

I am getting the text from API, can be random, but It contains expressions like on FB @xyz hi, @abc how u?? 1. I need to create a regex expression starts with @, ends with space. 2. Linkify it to open the user activity like XYZ or ABC. Please help me, I have tried to create a class like,I am getting the text from API, can be random,