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[英]How to check the Internet connection in android when WIFI is On but No Data Connection?
[英]how to check that WiFi or data connection is on but internet accessible or not
我想檢查WiFi或移動數據連接是否(能夠檢查)但能否訪問互聯網
public static boolean isNetworkAvailable(Context context) {
ConnectivityManager connectivityManager
= (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
return activeNetworkInfo != null && activeNetworkInfo.isConnected();
}
public static boolean isInternetAccessible(Context context) {
if (isNetworkAvailable(context)) {
try {
HttpURLConnection urlc = (HttpURLConnection) (new URL("http://aapapps.com").openConnection());
urlc.setRequestProperty("User-Agent", "Test");
urlc.setRequestProperty("Connection", "close");
urlc.setConnectTimeout(1500);
urlc.connect();
return (urlc.getResponseCode() == 200);
} catch (IOException e) {
Log.e("LOG_TAG", "Couldn't check internet connection", e);
}
} else {
Log.d("LOG_TAG", "Internet not available!");
}
return false;
}
嘗試其工作代碼
public boolean isConnectingToInternet(){
ConnectivityManager connectivity = (ConnectivityManager) _context.getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivity != null)
{
NetworkInfo[] info = connectivity.getAllNetworkInfo();
if (info != null)
for (int i = 0; i < info.length; i++)
if (info[i].getState() == NetworkInfo.State.CONNECTED)
{
return true;
}
}
return false;
}
檢查以下代碼,您必須在清單文件中添加Internet訪問權限。 如果isInternetConnectionAvailable()返回true,那么您的設備可以訪問互聯網,否則它不會連接到互聯網。
<uses-permission android:name="android.permission.INTERNET" />
public boolean isInternetConnectionAvailable() {
ConnectivityManager connectivity = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivity != null) {
NetworkInfo networkInfo = connectivity.getActiveNetworkInfo();//active network information
if (networkInfo != null) {
return networkInfo.isConnected();
}
}
return false;
}
如果您需要所有網絡信息,請使用以下代碼。
NetworkInfo[] info = connectivity.getAllNetworkInfo();
在檢查設備是否通過WiFi或移動數據連接后,為什么不直接ping谷歌或任何其他最有可能始終可用的網絡應用程序?
如果您收到有效回復,則可以訪問互聯網。
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