Questions about Andrews

My home page in the program defines a button to exit the program, I want to achieve when clicking on this button will pop up a
Box, shown above to determine the eject button and Cancel buttons, when you click OK to exit button completely exit the program, click on the Cancel button
When the box disappears, I ask how this implementation, the code written for me, thank you.<-! Main posts under Banner (D4) -><-! Posts under the main text (D5) ->
Reply:
Use Dialog can be achieved, the specific API to see it
Reply:
new AlertDialog.Builder (this) This class is the simplest.
Reply:
Head, with AlertDialog, then setMessage, setButton, processing corresponding onclick event on it.
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 btn.setOnClickListener (new View.OnClickListener () {

@ Override 
public void onClick (View v) {
/ / TODO Auto-generated method stub 
new AlertDialog.Builder (this) 
. SetTitle ("Tip!!") 
. SetMessage ("Are you sure to exit?") 
. SetIcon (android.R.drawable.ic_dialog_info) 
. SetNeutralButton ("OK", 
new DialogInterface.OnClickListener () {

@ Override 
public void onClick (DialogInterface dialog, 
int which) {
/ / TODO Auto-generated method stub 
MainActivity.this.finish (); 
} 
}) 
. SetPositiveButton ("Cancel", 
new DialogInterface.OnClickListener () {

@ Override 
public void onClick (DialogInterface dialog, 
int which) {
/ / TODO Auto-generated method stub 
return; 
} 
}); 
} 
}); 

Reply:
Sorry forgot to add. Show () the still that this activity into your name. This little mistake at the back
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references, 5th Floor tianwangjay reply:

sorry forgot to add back a bit wrong above show () the activity as well that this change you name this <.. / blockquote>

show () in which Canada?
Reply:

reference to the 6th floor u012733603 reply:

Quote: references, 5th Floor tianwangjay reply:

Sorry forgot to add the above bit error behind. Show () the still that this activity into your name. This

show () in which Canada?

Plus what I know, but there is a problem, you just quit the exit of the page rather than completely exit the program ah Andrews
Reply:
You can look at this http://my.eoe.cn/niunaixiaoshu/archive/1227.html