Android无法以编程方式连接到WIFI

如何解决Android无法以编程方式连接到WIFI

我编写了一个应与接入点连接的应用。这是我的代码：

网络请求

 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q)
 {
                WifiNetworkSpecifier.Builder builder = new WifiNetworkSpecifier.Builder();
                builder.setSsid(String.format("\"%s\"",accessPoint));
                builder.setWpa2Passphrase(String.format("\"%s\"",NETWORKPASSWORD));
                WifiNetworkSpecifier wifiNetworkSpecifier = builder.build();

                NetworkRequest.Builder networkbuilder = new NetworkRequest.Builder();
                networkbuilder.addTransportType(NetworkCapabilities.TRANSPORT_WIFI);
                networkbuilder.removeCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET);
                networkbuilder.addCapability(NetworkCapabilities.NET_CAPABILITY_TRUSTED);
                networkbuilder.setNetworkSpecifier(wifiNetworkSpecifier);

                NetworkRequest nr = networkbuilder.build();
                cm.requestNetwork(nr,callback,5000);
}

网络回调

ConnectivityManager.NetworkCallback callback = new ConnectivityManager.NetworkCallback()
{
                @Override
                public void onUnavailable()
                {
                    Log.d("NETWORKCALLBACK","Unavailable");
                    try
                    {
                       cm.unregisterNetworkCallback(this);
                    } 
                    catch (Exception ex)
                    {
                        ex.printStackTrace();
                    }

                }

                @Override
                public void onLost(Network network)
                {
                    Log.d("NETWORKCALLBACK","Lost");
                    try
                    {
                        cm.unregisterNetworkCallback(this);

                    } 
                    catch (Exception ex)
                    {
                        ex.printStackTrace();
                    }

                }

                @Override
                public void onCapabilitiesChanged(Network network,NetworkCapabilities networkCapabilities)
                {
                    Log.d("NETWORKCALLBACK","onCapabilitiesChanges");
                }

                @Override
                public void onLinkPropertiesChanged(Network network,LinkProperties linkProperties)
                {
                    Log.d("NETWORKCALLBACK","onLinkPropertiesChanges");
                }

                @Override
                public void onBlockedStatusChanged(Network network,boolean blocked)
                {
                    Log.d("NETWORKCALLBACK","onBlockedStatusChanged");
                }

                @Override
                public void onAvailable(Network network)
                {
                    Log.d("NETWORKCALLBACK","Available");
                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
                    {
                        cm.bindProcessToNetwork(network);

                    } 
                    else
                    {
                        ConnectivityManager.setProcessDefaultNetwork(network);
                    }

                    try
                    {
                        cm.unregisterNetworkCallback(this);
                    } 
                    catch (Exception ex)
                    {
                        ex.printStackTrace();
                    }
                }
            };

我的问题是，由于我的 NetworkRequest 超时，NetworkCallback 总是进入 onUnavailable 方法。如果我删除超时，则永远不会调用 NetworkCallback。

我使用 Android Q。

有人可以帮我吗？