Android如何获得wifi信号强度和连接子类型

Question

我正在检查网络类型通过调用此函数

  ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE); 
     NetworkInfo Info = cm.getActiveNetworkInfo(); 
     if (Info == null || !Info.isConnectedOrConnecting()) { 
      Log.i(TAG, "No connection"); 
     } else { 
      int netType = Info.getType(); 
      int netSubtype = Info.getSubtype(); 

      if (netType == ConnectivityManager.TYPE_WIFI) { 
       Log.i(TAG, "Wifi connection"); 
       //Need to get wifi strength 
      } else if (netType == ConnectivityManager.TYPE_MOBILE) { 
       Log.i(TAG, "GPRS/3G connection"); 
       //Need to get differentiate between 3G/GPRS 
      } 
     } 

我不想定期轮询wifi强度，但当我做一些网络的东西，我需要检查连接的wifi强度，我无法得到。 其次，当我得到netType（）为MOBILE时，我如何确定其3G/GPRS格式netSubType，我的意思是3g/Gprs等的整数值是多少.

请有人知道如何做到这一点。

谢谢

Answer 1

ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE); 
     NetworkInfo Info = cm.getActiveNetworkInfo(); 
     if (Info == null || !Info.isConnectedOrConnecting()) { 
      Log.i(TAG, "No connection"); 
     } else { 
      int netType = Info.getType(); 
      int netSubtype = Info.getSubtype(); 

      if (netType == ConnectivityManager.TYPE_WIFI) { 
       Log.i(TAG, "Wifi connection"); 
      wifiManager = (WifiManager)context.getSystemService(Context.WIFI_SERVICE); 
       int linkSpeed = wifiManager.getConnectionInfo().getLinkSpeed(); 
      //Need to get wifi strength 
     } else if (netType == ConnectivityManager.TYPE_MOBILE) { 
      Log.i(TAG, "GPRS/3G connection"); 
      //Need to get differentiate between 3G/GPRS 
     } 
    }