RK3188的wifi无法切换4G上网问题

之所以4G无法上网的根本原因是4G的ppp拨号没有设置指定路由导致的，只需在rk3188_5.1_mid\frameworks\base\services\core\java\com\android\server\ConnectivityService.java加入指定路由即可从根本上解决问题，分析详情见博客https://blog.csdn.net/u012246195/article/details/53427111

添加4G路由：

 

for (RouteInfo route : routeDiff.added) {

if (route.hasGateway() == false) continue;

if (DBG) log("Adding Route [" + route + "] to network " + netId);

try {

/**add by shihao for 4G start*/

if (route.getInterface().equals("ppp0")) {

RouteInfo xroute = RouteInfo.makeHostRoute(route.getGateway(),

route.getInterface()); // make host route for nexthop

mNetd.addRoute(netId, xroute); //add nexthop(getGateway()) for table ppp0

if (DBG) log("Adding Route [" + xroute + "] to network " + netId);

}

/**add by shihao for 4G end*/

mNetd.addRoute(netId, route);

} catch (Exception e) {

if ((route.getGateway() instanceof Inet4Address) || VDBG) {

loge("Exception in addRoute for gateway: " + e);

}

}

}