摘要：
Activity提供了startActivityForResult(Intent intent, int requestCode)方法打开新的Activity，新的Activity关闭后会向前面的Activity传回数据，为了能得到传回的数据，必须在旧的Activity中覆写onActivityResult(int requestCode, int resultCode, Intent data)方法，onActivityResult方法的回调时机是：You will receive this call immediately before onResume() when your act.. 阅读全文
