title: How to set "width" parameter back to "wrap_content" after set it to a specific value in code?
body: <p>For example, a TextView, whose original "width" in xml is "wrap_content". Then in java code, I set it to a specific value such as 50px.</p>
  
  <p>Now I want to change it back to "wrap_content", by means of changing the "LayoutParameter", but it didn't work.</p>
  
  <p>So what can I do with it? Thank you!</p>
  
  <p>RESOLVED</p>