startActivityForResult(Intent intent, int requestCode)//跳转到子activity,写在父Activity里,requestode返回时要用到setResult(Activity.RESULT_OK, intent);//子activity通过intent返回值,写在子activityonActivityResult(int requestCode, int resultCode, Intent data)//写在父activity里,判断requestCode值,从而知道是那个子返回的值,通过data获取值
startActivityForResult(Intent intent, int requestCode) 通过这个跳转到的那个activity
通过这个跳转到的那个activity
http://www.cnblogs.com/mubai/archive/2011/09/21/2183816.html