Android向Excel写入数据导出U盘并发送邮件

public WriteExcel(Context mContext){ this.mContext = mContext;}// 创建excel表public void createExcel(File file) { deleteExcel(file); WritableSheet ws = null; try { if (!file.exists()) {  wwb = Workbook.createWorkbook(file);//创建表  ws = wwb.createSheet("sheet1", 0);//表名 页数  // 在指定单元格插入数据  Label lbl1 = new Label(0, 0, "标签1");  Label lbl2 = new Label(1, 0, "标签2");  Label lbl3 = new Label(2, 0, "标签3");  Label lbl4 = new Label(3, 0, "标签4");  ws.addCell(lbl1);  ws.addCell(lbl2);  ws.addCell(lbl3);  ws.addCell(lbl4);  // 从内存中写入文件中  wwb.write();  wwb.close(); } } catch (Exception e) { e.printStackTrace(); }}/**向Execl写入数据* @Param ls List<map>数据* @Param emeailPath* @Param file*/public void writeToExcel(List<Map<String,Object>> ls,String emeailPath,File file) { try { Workbook oldWwb = Workbook.getWorkbook(file); wwb = Workbook.createWorkbook(file, oldWwb); WritableSheet ws = wwb.getSheet(0); // 当前行数 for (int i = 0; i < ls.size(); i++) {  int row = ws.getRows();  Label lab1 = new Label(0, row, ls.get(i).get("数据1") + "");  Label lab2 = new Label(1, row, ls.get(i).get("数据2") + "");  Label lab3 = new Label(2, row, ls.get(i).get("数据3") + "");  Label lab4 = new Label(3, row, ls.get(i).get("数据4") + "");  ws.addCell(lab1);  ws.addCell(lab2);  ws.addCell(lab3);  ws.addCell(lab4); } // 从内存中写入文件中,只能刷一次  wwb.write();  wwb.close();  if (emeailPath != null) {  postEmail(emeailPath);  }else{  final ProgressDialog precentDialog=new ProgressDialog(mContext);  precentDialog.setMessage("导出U盘中...");  precentDialog.setMax(100);  precentDialog.setCanceledOnTouchOutside(false);  precentDialog.show();  new Thread(){   public void run() {   //等待进度条   for (int i = 0; i < 100; i++) {    try {    long l= (long) (Math.random()*200);    Thread.sleep(l);    } catch (InterruptedException e) {    e.printStackTrace();    }    precentDialog.setProgress(i);   }   precentDialog.dismiss();   handler.sendEmptyMessage(1);   };  }.start();  } }catch(Exception e){  e.printStackTrace(); }}@SuppressLint("HandlerLeak")private Handler handler = new android.os.Handler() { @Override public void handleMessage(Message msg) { // TODO Auto-generated method stub super.handleMessage(msg); Toast.makeText(mContext,"导入U盘完成！",Toast.LENGTH_SHORT).show(); }};//删除文件夹private void deleteExcel(File file){ if(file.exists()){  file.delete(); }}

private void postEmail(String emailPath){　　SimpleDateFormat fmat=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");　　String time=fmat.format(new Date(System.currentTimeMillis()));　　String path=getExcelDir()+ File.separator+"IdCardInfo.xls";　　File file = new File(path);　　if(file.exists()){ 　　Intent email = new Intent(android.content.Intent.ACTION_SEND); 　　email.setType("application/octet-stream"); 　　 //邮件接收者（数组，可以是多位接收者） 　　 String[] emailReciver = new String[]{emailPath}; 　　 String emailTitle = "信息_"+time; 　　 String emailContent = "核验信息"; 　　 //设置邮件地址 　　 email.putExtra(android.content.Intent.EXTRA_EMAIL, emailReciver); 　　 //设置邮件标题 　　 email.putExtra(android.content.Intent.EXTRA_SUBJECT, emailTitle); 　　 //设置发送的内容 　　 email.putExtra(android.content.Intent.EXTRA_TEXT, emailContent); 　　 //附件 　　 email.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(file)); 　　//调用系统的邮件系统 　　 mContext.startActivity(Intent.createChooser(email, "请选择邮件发送软件"));　　}}