java.lang.NoClassDefFoundError: org.achartengine.renderer.XYMultipleSeriesRenderer解決辦法

AChartEngine在做android繪圖，achartengine.jar導進項目仍報java.lang.NoClassDefFoundError: org.achartengine.renderer.XYMultipleSeriesRenderer，上網找了些資料，找到如下解決方法：

在Eclipse中：

1. Right click your project - go to build path - select Configure buildpath
2. go to the "Order and Export" tab
3. Check the "achartengine-1.0.0.jar box and then single click its name
4. move it up so its right below the Android dependancies (sometimes this can make a difference if you have multiple Jars)

完成上述操作如果還報異常，android編譯後，SDK17中有些組件用的jar文件名爲lib，可以把放achartengine.jar文件名改爲libs。