Android将SQLite数据表导出到csv格式文件

通过FileWriter和BufferedWriter将SQLite数据表导出到csv格式文件的简单方法如下：

 public void ExportToCSV(Cursor c, String fileName) {

         int rowCount = 0;
         int colCount = 0;
         FileWriter fw;
         BufferedWriter bfw;
         File sdCardDir = Environment.getExternalStorageDirectory();
         File saveFile = new File(sdCardDir, fileName);
         try {

             rowCount = c.getCount();
             colCount = c.getColumnCount();
             fw = new FileWriter(saveFile);
             bfw = new BufferedWriter(fw);
             if (rowCount > 0) {
                 c.moveToFirst();
                 // 写入表头
                 for (int i = 0; i < colCount; i++) {
                     if (i != colCount - 1)
                        bfw.write(c.getColumnName(i) + ',');
                     else
                        bfw.write(c.getColumnName(i));
                 }
                 // 写好表头后换行
                 bfw.newLine();
                 // 写入数据
                 for (int i = 0; i < rowCount; i++) {
                     c.moveToPosition(i);
                     // Toast.makeText(mContext, "正在导出第"+(i+1)+"条",
                     // Toast.LENGTH_SHORT).show();
                     Log.v("导出数据", "正在导出第" + (i + 1) + "条");
                     for (int j = 0; j < colCount; j++) {
                         if (j != colCount - 1)
                             bfw.write(c.getString(j) + ',');
                         else
                            bfw.write(c.getString(j));
                     }
                     // 写好每条记录后换行
                     bfw.newLine();
                 }
             }
             // 将缓存数据写入文件
             bfw.flush();
             // 释放缓存
             bfw.close();
             // Toast.makeText(mContext, "导出完毕！", Toast.LENGTH_SHORT).show();
             Log.v("导出数据", "导出完毕！");
         } catch (IOException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         } finally {
             c.close();
         }
     }

调用方法：

 Cursor c = helper.rawQuery("select * from test", null);
 ExportToCSV(c, "test.csv");