user interface - How to set android:src="@android:drawable/presence_busy" programatically for imagebuton -

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when use imagebutton able chose android:src="@android:drawable/presence_busy" image imagebutton choosing "presence_bussy" on system tab of resource dialog box not know how programatically. i.e. if imagebutton btn11 using 

btn11.setimageresource(r.xxxxxx.xxxxx);

what should use here setimageresuorce ?!

you as:

btn11.setimageresource(android.r.drawable.presence_busy);

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