android 9.0 获取wifiInfo的信息

1.获取wifi权限

 if (checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION)
                    != PackageManager.PERMISSION_GRANTED) {
                String[] permissions = {Manifest.permission.ACCESS_FINE_LOCATION};
                requestPermissions(permissions, REQUEST_PERMISSION);
            }

2. 打开 位置 开关

 private BroadcastReceiver mReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();
            if (action == null) {
                return;
            }

            WifiManager wifiManager = (WifiManager) context.getApplicationContext()
                    .getSystemService(WIFI_SERVICE);
            assert wifiManager != null;

            switch (action) {
                case WifiManager.NETWORK_STATE_CHANGED_ACTION:
                case LocationManager.PROVIDERS_CHANGED_ACTION:
                    onWifiChanged(wifiManager.getConnectionInfo());
                    break;
            }
        }

然后 就通过 wifimanager 获取到 wifiInfo