反射获得SystemProperties

try {
    Class systemPropertiesClass = Class.forName("android.os.SystemProperties");
    Method m = systemPropertiesClass.getMethod("get", String.class);
    String dream = (String) m.invoke(systemPropertiesClass, "com.xxx.xxx.xxx");
    LogUtil.i("===getDreamValue  dream " + dream);
    return dream;
} catch (Exception e) {
}