java - What is the difference between setOnItemClickListener and only onItemClick -

i searched internet , read out documents on google android centre, still not clear difference between 2 , when use @ situation? go through stack-overflow not found detailed answer.

servicelistviewproviderpage.setonitemclicklistener(new adapterview.onitemclicklistener() {         @override         public void onitemclick(adapterview<?> parent, view view, int position, long id) {                       //something         }     }); 

and

servicelistviewproviderpage.setonitemclicklistener(this); public void onitemclick(adapterview<?> parent, view view, int position, long id) { //something } 

thanks in advance

both same different declarations , uses. first, lets see doing.

here:

view.setonitemclicklistener(listener); 

you setting listener in view.

after, must override method onitemclick of onitemclicklistener interface in order follow contract provided , make action on item click.

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now see code examples:

first case

// set listener wiew                  servicelistviewproviderpage.setonitemclicklistener(       // create new onitemclicklistener        new adapterview.onitemclicklistener() {      @override     //      public void onitemclick(adapterview<?> parent, view view, int position, long id) {                   //something     } }); 

here you're declaring listener anonymous inner class @ time set view.

pros:

• fast code

cons:

• if logic inside metod long or interface has many methods loose readability
• you cannot reuse logic inside listener
• can cause memory leaks (thanks @murat k)

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second case

to understand second 1 must see code must inside view implements adapterview.onitemclicklistener, that's why can use this

// here set class listener servicelistviewproviderpage.setonitemclicklistener(this); 

but, long must follow contract of interface, class must implement method:

public void onitemclick(adapterview<?> parent, view view, int position, long id) {     //something } 

pros:

• readability
• reusability

cons:

• make view listener not prefered way, more have class listener , view.