这是在android环境下，关于手机电池电量计算器的软件设计报告。-This is in the android environment, on the cell phone battery calculator software design report

基于安卓的简易计算器设计，实现简单的加减乘除及括号操作。(Based on Android's simple calculator design, realize simple addition, subtraction, multiplication and division and parenthesis operation.)

简易的计算器，页面设计，适合初学者使用。。。。(Simple calculator, page design, suitable for beginners to use...)