这是achartengine-1.0.0.jar下载，android图表开发组件，内容丰富，适合入门-android chart the development of components， rich in content， suitable for entry。
今天准备为大家讲讲aChatEngine方面的知识，在之后的一段时间里会陆续讲aChartEngine如何使用的Demo。
为什么选择aChartEngine给大家讲呢？因为在android平台上难免会遇到一些图表的处理，aChartEngine是个易学易用的图表库并且功能强大。
总的来说，aChartEngine是一个android应用的图表库，他支持一些常见的一些图表（文档中说明的那些类型）。下面是官方文档：
AChartEngine is a charting library for Android applications. It currently supports the following chart types:
· line chart
· area chart
· scatter chart
· time chart
· bar chart
· pie chart
· bubble chart
· doughnut chart
· range (high-low) bar chart
· dial chart / gauge
· combined (any combination of line， cubic line， scatter， bar， range bar， bubble) chart
· cubic line chart
All the above supported chart types can contain multiple series， can be displayed with the X axis horizontally (default) or vertically and support many other custom features. The charts can be built as a view that can be added to a view group or as an intent， such as it can be used to start an activity.
The model and the graphing code is well optimized such as it can handle and display huge number of values.
