一个Android纯代码实现的折线图小例子源码，没有使用任何第三方的东西，使用了点之间直接绘制直线的方式绘制的整体的折线图，对分辨率也做了适配可以根据分辨率动态调整绘制出的折线图，适合新手朋友编码GBK编译版本2.3.3(A pure Android code to achieve the line chart of small example source code, without the use of any third party that used to draw a line chart overall drawing straight lines between points directly on the resolution of adaptation can also make dynamic adjustment according to the resolution to draw the line chart, suitable for novice friend encoding GBK compiler version 2.3.3)