code: public final void setHint (CharSequence hint){
  		mInputView.setHint(hint);
  		if(mLabelView != null)
  			mLabelView.setText(hint);
  	}
docs: Sets the text to be displayed when the text of the TextView is empty.
  Null means to use the normal empty text. The hint does not currently
  participate in determining the size of the view.
  
  @attr ref android.R.styleable#TextView_hint