最近在做项目的时候,遇到一个需求,在某一个页面内需要连接指定Wifi,当退出这个页面时需要恢复原来的网络状态。于是就想到了退出页面时忘记此时连接的指定wifi。于是,代码开始了
WifiManager mWifiManager = (WifiManager)getSystemService(Context.WIFI_SERVICE);
mWifiManager.forget()...
等等,为什么forget是红色的,没提示呢???惊叹三秒钟只有赶紧回源码查看,原来是这样的
/**
* Delete the network in the supplicant config.
*
* This function is used instead of a sequence of removeNetwork()
* and saveConfiguration().
*
* @param config the set of variables that describe the configuration,
* contained in a {@link WifiConfiguration} object.
* @param listener for callbacks on success or failure. Can be null.
* @throws IllegalStateException if the WifiManager instance needs to be
* initialized again
* @hide
*/
public void forget(int netId, ActionListener listener) {
if (netId < 0) throw new IllegalArgumentException("Network id cannot be negative");
getChannel().sendMessage(FORGET_NETWORK, netId, putListener(listener));
}
看到这个@hide了没,原来这方法被隐藏掉了,看来要用只能用反射了啊,可是还是不甘心,不想用反射,于是就继续找啊找啊,于是在这个方法的注释里找到了这个:
* This function is used instead of a sequence of removeNetwork()
* and saveConfiguration().
好吧,我们就看看removeNetwork(),
/**
* Remove the specified network from the list of configured networks.
* This may result in the asynchronous delivery of state change
* events.
* @param netId the integer that identifies the network configuration
* to the supplicant
* @return {@code true} if the operation succeeded
*/
public boolean removeNetwork(int netId) {
try {
return mService.removeNetwork(netId);
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
看了上面的注释,大伙都应该明白了。于是问题完美解决,同样的save也用saveConfiguration()替代
/**
* Tell the supplicant to persist the current list of configured networks.
* <p>
* Note: It is possible for this method to change the network IDs of
* existing networks. You should assume the network IDs can be different
* after calling this method.
*
* @return {@code true} if the operation succeeded
*/
public boolean saveConfiguration() {
try {
return mService.saveConfiguration();
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
好了,就这样,再查资料的时候找到了有些博客,命名上面方法写的@hide,下面代码还是用forget,不知道最后成功了没。。。
欢迎不同意见的朋友一起留言讨论,共同学习进步。