Android editText 隐藏密码框

1. 
   
2.                 // display password text, for example "123456"  
3.                 mEtPassword.setTransformationMethod(HideReturnsTransformationMethod.getInstance());  
4.            
5.                 // hide password, display "."  
6.                 mEtPassword.setTransformationMethod(PasswordTransformationMethod.getInstance());  
7.