有效获取状态栏(StatusBar)高度

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();
}