去掉标题栏和系统栏代码实现以及动态设置密码

//Remove title bar 
this.requestWindowFeature(Window.FEATURE_NO_TITLE); 
 
//Remove notification bar 
this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); 
 
当然还有xml实现那就比较简单了 直接用主题就好了
 
mEdit.setTransformationMethod(PasswordTransformationMethod.getInstance());