简易计算器，支持加减乘除，并且运算数据可支持正负、小数，且可多位。 -Simple calculator, support to add, subtract, multiply and divide, and operational data can support positive and negative, decimal, and can be a number

刚开始学Android的时候，大家都写过计算器吧，这个计算器适用于新手，能够进行连加和小数的运算-Just beginning to learn Android, we have written the calculator, the calculator is designed for the novice, you can even add and decimal arithmetic! !