android 判断 wifi 是否是 5G

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/**     * 判断 wifi 是否是 5G 频段.     * 需要权限:     * <uses-permission android:name="android.permission.INTERNET" />     * <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />     * <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>     * <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />     */    public static boolean isWifi5G(Context context) {        int freq = 0;        WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);        WifiInfo wifiInfo = wifiManager.getConnectionInfo();        if (android.os.Build.VERSION.SDK_INT > android.os.Build.VERSION_CODES.LOLLIPOP) {            freq = wifiInfo.getFrequency();        } else {            String ssid = wifiInfo.getSSID();            if (ssid != null && ssid.length() > 2) {                String ssidTemp = ssid.substring(1, ssid.length() - 1);                List<ScanResult> scanResults = wifiManager.getScanResults();                for (ScanResult scanResult : scanResults) {                    if (scanResult.SSID.equals(ssidTemp)) {                        freq = scanResult.frequency;                        break;                    }                }            }        }        return freq > 4900 && freq < 5900;    }

注意不要忘记添加权限

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