对于我的应用程序,我需要确保用户在与服务器联系之前已连接到 wifi。我找到了两种方法来做到这一点,但我不确定一种是否足够。
首先我添加这个:
WifiManager wifiManager = (WifiManager) getActivity().getApplicationContext()
.getSystemService(WIFI_SERVICE);
if (!wifiManager.isWifiEnabled()) {
buildAlertNoWifi();
showProgressDialog(false, "");
return;
}
然后我这样做:
ConnectivityManager cm = (ConnectivityManager) getActivity()
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
if (activeNetwork != null) { // connected to the internet
if (activeNetwork.getType() == ConnectivityManager.TYPE_WIFI) {
// connected to wifi
} else if (activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE) {
// connected to the mobile provider's data plan
Toast.makeText(getContext(), "Make sure you connect to wifi.", Toast.LENGTH_LONG).show();
return;
}
} else {
Toast.makeText(getContext(), "Make sure you connect to wifi.", Toast.LENGTH_LONG).show();
return;
}
所以我想知道是否wifiManager.isWifiEnabled()
返回设备是连接到 wifi 还是只是打开了 wifi。如果是这样,单独使用它就足够了吗?