当wifi连接到无线调制解调器时,是否有互联网覆盖总是显示已连接,它只检查wifi的连接性而不是互联网的连接性,那么如何处理这种情况?
当WiFi连接到无线调制解调器时,只能检测到WiFi的连接状况,无法直接检测互联网连接。因此,即使互联网连接有问题,WiFi连接状态也会显示为“已连接”。要解决这种情况,可以尝试以下方法:当wifi连接到无线调制解调器时,是否有互联网覆盖总是显示已连接,它只检查wifi的连接性而不是互联网的连接性,那么如何处理这种情况?
当WiFi连接到无线调制解调器时,只能检测到WiFi的连接状况,无法直接检测互联网连接。因此,即使互联网连接有问题,WiFi连接状态也会显示为“已连接”。要解决这种情况,可以尝试以下方法:1.) 你可以通过以下方式来检查它:
URL url = new URL("YOUR urlString");
HttpURLConnection conn= (HttpURLConnection) url.openConnection();
.
.
int responseCode = conn.getResponseCode();
//if responseCode = 200 - THEn CONN is connected
或者
2.) 你可以这样做:
public static boolean isNetworkAvailable(Activity activity) {
ConnectivityManager connectivity = (ConnectivityManager) activity
.getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivity == null) {
return false;
} else {
NetworkInfo[] info = connectivity.getAllNetworkInfo();
if (info != null) {
for (int i = 0; i < info.length; i++) {
if (info[i].getState() == NetworkInfo.State.CONNECTED) {
return true; //<-- -- -- Connected
}
}
}
}
return false; //<-- -- -- NOT Connected
}
final ConnectivityManager connectivityManager = (ConnectivityManager)context.
getSystemService(Context.CONNECTIVITY_SERVICE);
final Network network = connectivityManager.getActiveNetwork();
final NetworkCapabilities capabilities = connectivityManager
.getNetworkCapabilities(network);
return capabilities != null
&& capabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED);
试一下。
private boolean haveNetworkConnection(Context context)
{
boolean haveConnectedWifi = false;
boolean haveConnectedMobile = false;
ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo[] netInfo = cm.getAllNetworkInfo();
for (NetworkInfo ni : netInfo)
{
if (ni.getTypeName().equalsIgnoreCase("WIFI"))
{
if (ni.isConnected())
{
haveConnectedWifi = true;
Log.v("WIFI CONNECTION ", "AVAILABLE");
} else
{
Log.v("WIFI CONNECTION ", "NOT AVAILABLE");
}
}
if (ni.getTypeName().equalsIgnoreCase("MOBILE"))
{
if (ni.isConnected())
{
haveConnectedMobile = true;
Log.v("MOBILE INTERNET CONNECTION ", "AVAILABLE");
} else
{
Log.v("MOBILE INTERNET CONNECTION ", "NOT AVAILABLE");
}
}
}
return haveConnectedWifi || haveConnectedMobile;
}
希望能对您有所帮助。
您可以使用此功能在Android上检查wifi或移动数据连接的互联网连接。
public boolean isConnected() {
ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
boolean NisConnected = activeNetwork != null && activeNetwork.isConnected();
if (NisConnected) {
// if (activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE || activeNetwork.getType() == ConnectivityManager.TYPE_WIFI)
if (activeNetwork.getType() == ConnectivityManager.TYPE_WIFI) {
return true;
} else if (activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE)
return true;
else
return false;
}
return false;
}
你试过这个吗?
http://developer.android.com/reference/android/net/NetworkInfo.html#isConnected()
描述如下:
指示网络连接是否存在,以及是否可以建立连接并传输数据。
如果您只使用ConnectivityManager,则仅提供连接信息(WiFi、移动网络、WiMax等)以及是否已连接。
为确保数据连接,您可以进行ping测试:
public static boolean ping() {
try {
SocketAddress addr = new InetSocketAddress("www.example.com", 80); // Set IP/Host and Port
Socket socket = new Socket();
//Connect socket to address, and set a time-out to 5 sec
socket.connect(addr, 5000);
//If network isn't conecctet then throw a IOException else socket is connected successfully
socket.close();
return true;
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return true;
}
就像这样
public static boolean isNetworkAvailable(Context context)
{
ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
return networkInfo != null && networkInfo.isConnectedOrConnecting();
}