detach

I am new at NFC technology. I am trying to read and write Mifare Classic 4K tags. I succeeded reading and writing. I can detect the tag on onNewIntent action. My problem is that I could't detect when an NFC tag was removed (similar to onNewIntent when detecting a tag). How can I solve this problem? There is no event that notifies your app if a tag is removed from the reader. A typical approach to detect removal is to actively poll the tag (e.g. by reading an NDEF message or a data block) until you receive IOException indicating that communication with the tag was lost. UPDATE As of Android API

I have the current scenario: I'm using EF6 Code first, and have created a data-model something like this: public class MainObject{ ..some properties IList<SubObject> SubObjects{get;set;} } public class SubObject{ ..some properties IList<SubSubObject> SubSubObjects{get;set;} } public class SubObject{ ..some properties IList<SubObject> SubObjects{get;set;} } So basically I have a main object, that has 0 to many subobjects, and there is a many to many relationship between the subobject and the subsubobjects. I am creating a MVC application, so my normal program flow is that the user request a

I'm trying to get the code here to work. It compiles fine. It will run. And it will load tab 1 (of 3). However, when I click on the 2nd or 3rd tab, I get this: java.lang.NoSuchMethodError: android.app.FragmentTransaction.detach this happens in the code here public void onTabUnselected(Tab tab, FragmentTransaction ft) { if (mFragment != null) { //ft.detach(mFragment); //requires API Level 13 ft.remove(mFragment); //this does not do the same thing as detach } } I found that detach is only available to API Level 13. I tried remove , but it doesn't do the same thing, obviously. Does anyone have

What is different between join() and detach() in multi threading in C++? Does join() kill the thread? Michael Burr A C++ thread object generally (but not always) represents a thread of execution, which is an OS or platform concept. When thread::join() is called, the calling thread will block until the thread of execution has completed. Basically, this is one mechanism that can be used to know when a thread has finished. When thread::join() returns, the OS thread of execution has completed and the C++ thread object can be destroyed. The thread::detach() is called, the thread of execution is

I've been using the pthread library for creating & joining threads in C. When should I create a thread as detached, right from the outset? Does it offer any performance advantage vs. a joinable thread? Is it legal to not do a pthread_join() on a joinable (by default) thread? Or should such a thread always use the detach() function before pthread_exit() ing? Create a detached thread when you know you won't want to wait for it with pthread_join() . The only performance benefit is that when a detached thread terminates, its resources can be released immediately instead of having to wait for the

I have a situation in which I need to re-attach detached objects to a hibernate session, although an object of the same identity MAY already exist in the session, which will cause errors. Right now, I can do one of two things. getHibernateTemplate().update( obj ) This works if and only if an object doesn't already exist in the hibernate session. Exceptions are thrown stating an object with the given identifier already exists in the session when I need it later. getHibernateTemplate().merge( obj ) This works if and only if an object exists in the hibernate session. Exceptions are thrown when I