Textutils.isempty () and the Equals method.

Carefully read the official Api:returns True if the string is null or 0-length. Because you are returning a variable from EditText. If the variable itself is a null value, then the Equals method you drop it is going to give an error. But if you call Textutils.isempty (), pass the variable as a parameter. As long as this parameter is empty or "", it will return true. So, with the official give more rigorous. And. is also very convenient. Because you are alone to judge you are not going to write an if statement to judge. Returns a Boolean value, why does someone else pave the way?

Textutils.isempty () and the Equals method.