Java 尝试从excel获取数据时获取空指针异常？

我试图用java从excel中获取数据。如果我像普通java程序一样执行它，我会从excel中获取数据，并在控制台中打印出来。但当我把它放在Robotium测试项目中时，我会得到空指针异常（找不到文件或目录）

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您正在阅读文件

C://Documents//Robo//robo1.xls

，该文件存储在您的计算机硬盘上，您的手机当然无法访问。您需要将文件放在手机SD卡上，并改为使用该位置的uri：

File storage = Environment.getExternalStorageDirectory() //Returns sd-card
String filename = "robo1.xls"; //file name, may have path separators
File myfile = new File(storage, filename);
//myfile is now a File object that you can use, to get the path, use myfile.getAbsolutePath()

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张贴stacktrace并告诉我们哪一行抛出该异常。@Vaishnavi谢谢：）请单击左侧分数下的复选标记接受答案。

File storage = Environment.getExternalStorageDirectory() //Returns sd-card
String filename = "robo1.xls"; //file name, may have path separators
File myfile = new File(storage, filename);
//myfile is now a File object that you can use, to get the path, use myfile.getAbsolutePath()