Android：如何以编程方式查找WiFi频道的带宽？

Question

在我的应用程序中，我使用ScanResult来获取网络列表。我如何找到网络的带宽（比如22MHz或40MHz等）？

Answer 1

你可以通过使用下面的函数来获得带宽的范围，但不是确切的带宽。

public static void printBandwidthOfConnection(Context context){ 
     NetworkInfo info = Connectivity.getNetworkInfo(context); 
     Log.i("Range",rangeOfConnection(info.getType(),info.getSubtype()))); 
    } 

    /** 
    * Check if the connection is fast 
    * @param type 
    * @param subType 
    * @return string 
    */ 
    public static String rangeOfConnection(int type, int subType){ 
     if(type==ConnectivityManager.TYPE_WIFI){ 
      return "wifi"; 
     }else if(type==ConnectivityManager.TYPE_MOBILE){ 
      switch(subType){ 
      case TelephonyManager.NETWORK_TYPE_1xRTT: 
       return "50-100 kbps"; 
      case TelephonyManager.NETWORK_TYPE_CDMA: 
       return " 14-64 kbps"; 
      case TelephonyManager.NETWORK_TYPE_EDGE: 
       return "50-100 kbps"; 
      case TelephonyManager.NETWORK_TYPE_EVDO_0: 
       return "400-1000 kbps"; 
      case TelephonyManager.NETWORK_TYPE_EVDO_A: 
       return "600-1400 kbps"; 
      case TelephonyManager.NETWORK_TYPE_GPRS: 
       return "100 kbps"; 
      case TelephonyManager.NETWORK_TYPE_HSDPA: 
       return "2-14 Mbps"; 
      case TelephonyManager.NETWORK_TYPE_HSPA: 
       return "700-1700 kbps"; 
      case TelephonyManager.NETWORK_TYPE_HSUPA: 
       return "1-23 Mbps" 
      case TelephonyManager.NETWORK_TYPE_UMTS: 
       return "400-7000 kbps"; 
      /* 
      * Above API level 7, make sure to set android:targetSdkVersion 
      * to appropriate level to use these 
      */ 
      case TelephonyManager.NETWORK_TYPE_EHRPD: // API level 11 
       return " 1-2 Mbps"; 
      case TelephonyManager.NETWORK_TYPE_EVDO_B: // API level 9 
       return "5 Mbps"; 
      case TelephonyManager.NETWORK_TYPE_HSPAP: // API level 13 
       return "10-20 Mbps"; 
      case TelephonyManager.NETWORK_TYPE_IDEN: // API level 8 
       return "25 kbps"; 
      case TelephonyManager.NETWORK_TYPE_LTE: // API level 11 
       return "10+ Mbps"; 
      default: 
       return null; 
      } 
     }else{ 
      return null; 
     } 
    }