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");