的Android 4.0 - 檢查連接到WiFi

我用下面的函數來檢查連接到WiFi熱點點：的Android 4.0 - 檢查連接到WiFi

public boolean IsWiFiConnected(){ 
List<WifiConfiguration> wifiConfigList = wifiManager.getConfiguredNetworks(); 
boolean retVal=false; 
    for(WifiConfiguration wifiConf : wifiConfigList){    
     if(wifiConf.status==WifiConfiguration.Status.CURRENT){ 
      retVal=true; 
      break; 
     } 
    } 
return retVal; 
}

在Android 4.0的它總是返回false。它在以前的版本上運行良好。謝謝

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2012-03-26 Nolesh

...因爲它返回啓用。我用4.2.2試過，發現它再次返回CURRENT。不知道爲什麼...看[這裏]（http://stackoverflow.com/questions/22795829/differences-between-wificonfiguration-status）。 – 2014-04-01 20:13:35

有一個比你更快和更可靠的方法。

public boolean IsWiFiConnected() { 
    ConnectivityManager manager = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE); 
    NetworkInfo netInfo = manager.getNetworkInfo(ConnectivityManager.TYPE_WIFI); 

    return netInfo.isConnected(); 
}

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2012-03-26 14:11:27

只是對加布裏埃爾的答案擴大，因爲它可能是值得檢查用戶的任何數據連接，即; WiFi或數據。這也會顯示一個對話框詢問用戶他們是否想用Intent打開WiFi。希望這可以幫助你！

private boolean haveNetworkConnection() { 
    boolean haveConnectedWifi = false; 
    boolean haveConnectedMobile = false; 

    ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE); 
    NetworkInfo[] netInfo = cm.getAllNetworkInfo(); 
    for (NetworkInfo ni : netInfo) { 
     if (ni.getTypeName().equalsIgnoreCase("WIFI")) 
      if (ni.isConnected()) 
       haveConnectedWifi = true; 
     if (ni.getTypeName().equalsIgnoreCase("MOBILE")) 
      if (ni.isConnected()) 
       haveConnectedMobile = true; 

    } 
    if (haveConnectedWifi == false && haveConnectedMobile == false) { 
     Log.d("Network State", "false"); 
     AlertDialog.Builder alert = new AlertDialog.Builder(YourActivity.this);     
     alert.setTitle("No Data Connection!"); 
     alert.setMessage("You have no data connection."); 
      alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() { 

       public void onClick(DialogInterface dialog, int whichButton) { 
        // TODO Auto-generated method stub 
        final Intent intent = new Intent(Intent.ACTION_MAIN, null); 
        intent.addCategory(Intent.CATEGORY_LAUNCHER); 
        final ComponentName cn = new ComponentName("com.android.settings", "com.android.settings.wifi.WifiSettings"); 
        intent.setComponent(cn); 
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
        startActivity(intent); 
       } 

      }); 
      alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() { 

       public void onClick(DialogInterface dialog, int which) { 
        // TODO Auto-generated method stub 
        return; 
       } 
      }); 
      alert.show(); 

    }else{ 
     //do something else 
    } 
    return haveConnectedWifi || haveConnectedMobile; 
}

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2012-03-26 16:54:10

檢查無線網絡連接狀態：

ConnectivityManager conMgr; 
NetworkInfo netInfo; 
WifiManager wifiMgr; 

conMgr=(ConnectivityManager)getSystemService(context.WIFI_Service); 
netInfo=conMgr.getActiveNetworkInfo(); 
if(!(netInfo==null)) 
{ 
if(WifiMgr.isWifiEnabled()) 
{ 
//wifi enabled 
} 
else 
{ 
//wifi disabled i.e not available 
} 
}

來源

2012-11-12 05:22:43

的Android 4.0 - 檢查連接到WiFi

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