如果移动数据已打开，wifi也已打开但没有数据。那么如何通过WIFI发送请求

Posted 2023-04-15

【中文标题】如果移动数据已打开，wifi也已打开但没有数据。那么如何通过WIFI发送请求

【英文标题】：if mobile data is on and wifi is also on but does not have data.then how to send request by WIFI

【发布时间】：2018-04-20 16:33:00

【问题描述】：

如果您只想使用 Wifi，请使用此代码。 请确保 android 版本应大于 21。

@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
public static void stayOnWifi(Context context) 
    final ConnectivityManager connection_manager =
            (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);

    NetworkRequest.Builder request = new NetworkRequest.Builder();
    request.addTransportType(NetworkCapabilities.TRANSPORT_WIFI);

    connection_manager.registerNetworkCallback(request.build(), new ConnectivityManager.NetworkCallback() 

        @Override
        public void onAvailable(Network network) 
            ConnectivityManager.setProcessDefaultNetwork(network);
        
    );

【参考方案1】：

在wifi没有数据的情况下要从WIFI发送请求时使用。

@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
public static void stayOnWifi(Context context) 
    final ConnectivityManager connection_manager =
            (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);

    NetworkRequest.Builder request = new NetworkRequest.Builder();
    request.addTransportType(NetworkCapabilities.TRANSPORT_WIFI);

    connection_manager.registerNetworkCallback(request.build(), new ConnectivityManager.NetworkCallback() 

        @Override
        public void onAvailable(Network network) 
            ConnectivityManager.setProcessDefaultNetwork(network);
        
    );

如果 wifi 没有任何数据，当你想从 wifi 发送请求时使用此方法。 上面代码的问题是当你强制设置数据使用优先级时。如果我们设置 wifi 优先应用程序将无法使用移动数据，如果为移动数据数据设置优先级，那么无论 wifi 是否有数据，应用程序都无法使用 wifi .

---

问题解决方案我们应该使用广播，意思是当我们想从没有数据的wifi发送请求时使用上述方法，完成使用广播后，它设置可以是移动或wifi的可用数据。意味着限制将被取消。

@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)

public static void stayOnMobileData(Context context) 
    final ConnectivityManager connection_manager =
            (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkRequest.Builder request = new NetworkRequest.Builder();
    request.addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET);
    request.addTransportType(NetworkCapabilities.TRANSPORT_CELLULAR);
    connection_manager.registerNetworkCallback(request.build(), new ConnectivityManager.NetworkCallback() 
        @Override
        public void onAvailable(Network network) 
            ConnectivityManager.setProcessDefaultNetwork(network);
        
    );

---

广播

public class NetworkStateChangeBroadcast extends BroadcastReceiver 
    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)

    @Override
    public void onReceive(Context context, Intent intent) 
        if (in.bets.bettywifi.ui.common.BaseActivity.checkNetworkStatus(context)) 
            final ConnectivityManager connMgr = (ConnectivityManager) context
                    .getSystemService(Context.CONNECTIVITY_SERVICE);

            final android.net.NetworkInfo wifi = connMgr
                    .getNetworkInfo(ConnectivityManager.TYPE_WIFI);

            final android.net.NetworkInfo mobile = connMgr
                    .getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
            if (wifi.isConnected()) 

                BaseActivity.stayOnWifi(context);
             else if (mobile.isConnected()) 

                BaseActivity.stayOnMobileData(context);

            
        
    

【参考方案2】：

@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
public static void stayOnWifi(Context context) 
    final ConnectivityManager connection_manager =
            (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);

    NetworkRequest.Builder request = new NetworkRequest.Builder();
    request.addTransportType(NetworkCapabilities.TRANSPORT_WIFI);

    connection_manager.registerNetworkCallback(request.build(), new ConnectivityManager.NetworkCallback() 

        @Override
        public void onAvailable(Network network) 
            ConnectivityManager.setProcessDefaultNetwork(network);
        
    );