TypedArray ta = context.obtainStyledAttributes(attrs, new int[] {

????????????????android.R.attr.layout_width, android.R.attr.layout_height?});

String w = ta.getString(0);

????????String h = ta.getString(1);

????????if (w.indexOf("-2") > -1) {

????????????throw new IllegalArgumentException(

????????????????????"the UISwitch only?can run?exactly screen");

????????}

????????if (h.indexOf("-2") > -1) {

????????????throw new IllegalArgumentException(

????????????????????"the UISwitch only?can run?exactly screen");

????????}

ta.recirle()