updated by bajian 增加string 类型返回 优化个别代码性能,如attributes.recycle();等 增加CodeInputCallback 监听onInputFinish和onInput 增加CodeInputEditText extends EditText 特性更多。比如可以很方便的时候et的特性，如maxLength，预输入.. 增加使用例子 Material Code input A material style input for put codes Based on Code input field concept by SAMUEL KANTA