我在以太网连接方面遇到一些问题,尤其是NetworkInfo类始终返回null。
我实际上正在使用此代码:
ConnectivityManager connManager = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE); //not null
NetworkInfo networkInfo = connManager.getNetworkInfo(ConnectivityManager.TYPE_ETHERNET); //null
return networkInfo != null && networkInfo.isConnected();
我正在尝试建立以太网连接,有人可以帮助我吗?
提前致谢!
最佳答案
对于以太网,请尝试如下
public Boolean isEthernetConnected(){
if(isNetworkAvailable()){
ConnectivityManager cm
= (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
return (cm.getActiveNetworkInfo().getType() == ConnectivityManager.TYPE_ETHERNET);
}
return false;
}
private Boolean isNetworkAvailable() {
ConnectivityManager connectivityManager
= (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
return activeNetworkInfo != null && activeNetworkInfo.isConnectedOrConnecting();
}
关于java - NetworkInfo返回始终为null,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/58236826/