在活动之间传递日期时间戳

//在Activity之间传递日期：
//传值：
Intent data = new Intent();
data.putExtra("beginDate", String.valueOf(mBeginDate));
data.putExtra("endDate", String.valueOf(mEndDate));
setResult(RESULT_OK, data);

//获取：
Timestamp beginDate = Timestamp.valueOf(data.getStringExtra("beginDate"));
Timestamp endDate = Timestamp.valueOf(data.getStringExtra("endDate"));