a] view plain copy editText.setInputType(InputType.TYPE_CLASS_NUMBER); //输入类型 editText.setFilters(new InputFilter[]{new InputFilter.LengthFilter(6)}); //最大输入长度 editText.setTransformationMethod(PasswordTransformationMethod.getInstance()); //设置为密码输入框 转自:http://blog.youkuaiyun.com/centralperk/article/details/44750801