Question

i have a menu that contains just one item.

Button exit;
@Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // TODO Auto-generated method stub
        super.onCreateOptionsMenu(menu);
        MenuInflater blowUp = getMenuInflater();
        blowUp.inflate(R.menu.exitmenu, menu);
        return true;
    }
exit=(Button)findViewById(R.id.bexitMenuExit);

if i add listener to exit button , i got excpetion (null pointer), i am sure that there is no syntax error, the button exit is comming from this menu

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
    <item android:id="@+id/bexitMenuExit"
        android:title="Exit"


        android:icon="@android:drawable/ic_menu_close_clear_cancel"
        ></item>
</menu>

what am i doing wrong?

Answer 1

There is no need to initialize Button and this doesn’t make sence for me.
Just inflate your Menu and just override onOptionsItemSelected method:

@Override
public boolean onCreateOptionsMenu(Menu menu) {
   new MenuInflater(getApplicationContext()).inflate(R.menu.exitmenu, menu);
   return super.onCreateOptionsMenu(menu);
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
   switch(item.getId()) {
      case R.id.bexitMenuExit:
         // work that will start when you click on this
      ...
   }
}

Also, there is no need to use OnClickListener, for this there is onOptionsItemSelected method and you should use it.