EditText设置明文暗文显示

//控制密码明文暗文监听事件
        cbSee.setOnCheckedChangeListener { compoundButton, b ->
            if (b){
                etPassWord.transformationMethod = HideReturnsTransformationMethod.getInstance();
            }else{
                etPassWord.transformationMethod = PasswordTransformationMethod.getInstance();
            }
            etPassWord.setSelection(etPassWord.text.toString().trim().length);
        }