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Android开发生成保存Excel文件，首先下载两个jar包。下载地址：Android读写Excel文件的两个jar包资源-CSDN文库

poi-3.12-android-a.jar

poi-ooxml-schemas-3.12-20150511-a.jar

把jar包放在app的libs文件夹下，引用jar我一般都在build.gradle的dependencies中添加

implementation fileTree(dir: "libs", include: ["*.?ar"])

把.jar和.aar都引用上。

如果项目需要混淆，则加上混淆

#生成Excel
-keep class com.bea.xml.stream.** { *;}
-keep class com.wutka.dtd.** { *;}
-keep class org.** { *;}
-keep class aavax.xml.** { *;}
-keep class com.microsoft.schemas.office.x2006.** { *; }
-keep class schemaorg_apache_xmlbeans.** { *; }
-keep class schemasMicrosoftComOfficeExcel.** { *; }
-keep class schemasMicrosoftComOfficeOffice.** { *; }
-keep class schemasMicrosoftComVml.** { *; }
-keep class repackage.** { *; }
-keep class schemaorg_apache_xmlbeans.** { *; }

然后就是生成Excel文件了

/*** 创建excel分析结果文件*/private void createExcel(){new Thread(){@Overridepublic void run() {try {Log.i("lllllll", "createExcel  ======");XSSFWorkbook workbook = new XSSFWorkbook();XSSFSheet sheet = workbook.createSheet(WorkbookUtil.createSafeSheetName("sheet"));//第一行Row row0 = sheet.createRow(0);String[] title = new String[]{"市公司", "道路名称", "路段长度（米）", "计算值", "起始经纬度", "结束经纬度"};for (int i= 0;i<title.length;i++){Cell cell = row0.createCell(i);cell.setCellValue(title[i]);}//添加数据for (int i= 0;i<excelBeans.size();i++){ExcelBean eb = excelBeans.get(i);Row row = sheet.createRow(i+1);for (int j= 0;j<title.length;j++){Cell cell = row.createCell(j);if (j == 0){cell.setCellValue(eb.getCity());}else if (j == 1){cell.setCellValue(eb.getAddress());}else if (j == 2){double distance = DistanceUtil.getDistance(eb.getStartLatLng(), eb.getStopLatLng());cell.setCellValue(NumberUtils.makeNumDecimalPlaces(distance, 2));}else if (j == 3){cell.setCellValue(eb.getCoverage());}else if (j == 4){cell.setCellValue("["+eb.getStartLatLng().longitude + ","+eb.getStartLatLng().latitude+"]");}else if (j == 5){cell.setCellValue("["+eb.getStopLatLng().longitude + ","+eb.getStopLatLng().latitude+"]");}}}String path = parseFile.getAbsolutePath();SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMdd-HHmmss");String time = dateFormat.format(new Date());analysisFilePath = path.replace(".csv", "_analysis_"+earfcn+"_"+time+".xlsx");Log.i("lllllll", "fileName  ======" +analysisFilePath);FileOutputStream fos = new FileOutputStream(analysisFilePath);workbook.write(fos);fos.flush();fos.close();Log.i("lllllll", "保存成功  ======");}catch (Exception e){e.printStackTrace();}}}.start();}

我这生成Excel之后，在手机里能打开，但是在电脑上只能用WPS打开，用offic打开就会报错。我查了半天，最终没有找到问题在哪。有可能是我电脑上的offic版本太低了，不过WPS能打开已经能满足需求了。