问题描述

如何在应用程序中获取网络强度？

我想在手机设备中显示网络的网络强度。
现在我可以检查到 wifi 的连接。但是我需要知道网络信号强度，我要在下面的代码基础上再添加什么代码？

ConnectivityManager connectivityManager = (ConnectivityManager) context                .getSystemService(Context.CONNECTIVITY_SERVICE);        NetworkInfo activeNetInfo = connectivityManager                .getActiveNetworkInfo();        NetworkInfo mobNetInfo = connectivityManager                .getNetworkInfo(ConnectivityManager.TYPE_MOBILE);           TextView netStatus = (TextView) findViewById(R.id.netStatus);        if (activeNetInfo != null) {            netStatus.setText("" Connection Status - Connected ""+activeNetInfo.getTypeName());        } else if (mobNetInfo != null) {            netStatus.setText("" Connection Status - Connected ""+mobNetInfo.getTypeName());        } else {            netStatus.setText("" Connection Status - Not Connected "");        }

解决方案

使用下面的代码：

ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);    NetworkInfo Info = cm.getActiveNetworkInfo();    if (Info == null || !Info.isConnectedOrConnecting()) {        Log.i(TAGNo connection"");    } else {        int netType = Info.getType();        int netSubtype = Info.getSubtype();        if (netType == ConnectivityManager.TYPE_WIFI) {            Log.i(TAGWifi connection"");            WifiManager wifiManager = (WifiManager) getApplication().getSystemService(Context.WIFI_SERVICE);            List<ScanResult> scanResult = wifiManager.getScanResults();            for (int i = 0; i < scanResult.size(); i++) {                Log.d(""scanResult""Speed of wifi""+scanResult.get(i).level);//The db level of signal             }            // Need to get wifi strength        } else if (netType == ConnectivityManager.TYPE_MOBILE) {            Log.i(TAGGPRS/3G connection"");            // Need to get differentiate between 3G/GPRS        }    }

解决方案二：

wifi的信号强度可以这样获取mWifiManager =(WifiManager)mContext.getSystemService(Context.WIFI_SERVICE);mWifiManager.getConnectionInfo().getRssi()对应的就是下面两个方法 public WifiInfo getConnectionInfo() {        try {            return mService.getConnectionInfo();        } catch (RemoteException e) {            return null;        }  }    public int getRssi() {        return mRssi;    }