android：如何知道設備中是否有互聯網連接？

Question

我想檢查設備中的互聯網連接是否可用，所以我該如何獲取..請為此提供代碼。

非常感謝

Answer 1

嘿，伙計...應用此代碼..可能對提前感謝您很有幫助....

布爾連接；

    private boolean checkInternetConnection()
    {

        ConnectivityManager conMgr = (ConnectivityManager) getSystemService (Context.CONNECTIVITY_SERVICE);

        // ARE WE CONNECTED TO THE NET

        if (conMgr.getActiveNetworkInfo() != null

                && conMgr.getActiveNetworkInfo().isAvailable()

                && conMgr.getActiveNetworkInfo().isConnected()) 
        {

        return true;

        }
        else 
        {
        return false;

        }
    }

Answer 2

        ConnectivityManager connectionService =
            (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);
        if (connectionService.getActiveNetworkInfo().isConnectedOrConnecting()) {
            // Device is online
        }

Answer 3

// Network is connected or not 
public boolean isConnected()
{
    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)
                  {
                      Log.d("LOG","Network is Available");
                      return true;
                  }

      }
      return false;
}

Answer 4

請使用以下功能為了檢查互聯網連接：

public boolean isOnline()
    {

         ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
         NetworkInfo ni = cm.getActiveNetworkInfo();
         boolean result = false;
         if(ni != null )
         {
             if(  ni.getState() == NetworkInfo.State.CONNECTED )
             {
                 result = true;
             }
         }

         return result;

        } 

檢查isOnline（）返回的結果。如果為true，則說明已連接Internet，否則未連接Inernet 。 希望這個能對您有所幫助..：）

Answer 5

使用此Answer It的幫助。

public boolean isOnline() {
  ConnectivityManager cm =(ConnectivityManager)      
  getSystemService(Context.CONNECTIVITY_SERVICE);
  NetworkInfo netInfo = cm.getActiveNetworkInfo();
  if (netInfo != null && netInfo.isConnectedOrConnecting()) {
     return true;
  }
  return false;
}

if(temp==true){
    genHelper.showToast("Net Connection");              
}else{              
    genHelper.showToast(" Not  Connected");
}