Android如何获取wifi信号强度和连接子类型

Question

我正在通过调用此函数检查网络类型

        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，但是当我做一些网络工作时，我需要检查我无法获得的连接的 wifi 强度。 其次，当我将 netType() 设为 MOBILE 时，如何确定其 3G/GPRS 形式的 netSubType，我的意思是 3g/Gprs 等的整数值是多少。

请任何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
        } 
    }