Class<?> c = null;Object obj = null;Field field = null;int x = 0, sbar = 0;try {    c = Class.forName("com.android.internal.R$dimen");    obj = c.newInstance();    field = c.getField("status_bar_height");    x = Integer.parseInt(field.get(obj).toString());    sbar = getResources().getDimensionPixelSize(x);} catch (Exception e1) {    loge("get status bar height fail");    e1.printStackTrace();}