protected void onActivityResult (int requestCode, int resultCode, Intent data)
Since: API Level 1 Called when an activity you launched exits, giving you the requestCode you started it with, the resultCode it returned, and any additional data from it. The resultCode will be RESULT_CANCELED if the activity explicitly returned that, didn't return any result, or crashed during its operation. You will receive this call immediately before onResume() when your activity is re-starting.
由此可見onActivityResult()發生在onResume()之前。
