在Android Q中，可以使用WifiNetworkSpecifier类来通过编程方式连接不同的WiFi接入点进行上网。以下是一个示例代码，用于创建一个WiFi网络连接请求：

// 在AndroidManifest.xml中添加以下权限
// 

// 在Activity或Fragment中的代码
import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;
import android.net.ConnectivityManager;
import android.net.Network;
import android.net.NetworkCapabilities;
import android.net.NetworkRequest;
import android.net.wifi.WifiNetworkSpecifier;
import android.net.wifi.WifiManager;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.annotation.RequiresApi;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;

public class MainActivity extends AppCompatActivity {

    private static final int PERMISSIONS_REQUEST_CODE = 1;
    private static final String SSID = "YourWiFiSSID"; // 替换为你要连接的WiFi的SSID
    private static final String PASSWORD = "YourWiFiPassword"; // 替换为你要连接的WiFi的密码

    private ConnectivityManager.NetworkCallback networkCallback;

    private Button connectButton;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        connectButton = findViewById(R.id.connect_button);
        connectButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                connectToWifi();
            }
        });

        // 检查并请求位置和WiFi权限
        checkAndRequestPermissions();
    }

    private void connectToWifi() {
        WifiNetworkSpecifier specifier = new WifiNetworkSpecifier.Builder()
                .setSsid(SSID)
                .setWpa2Passphrase(PASSWORD)
                .build();

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

        networkCallback = new ConnectivityManager.NetworkCallback() {
            @Override
            public void onAvailable(@NonNull Network network) {
                super.onAvailable(network);
                // 网络连接成功
                Toast.makeText(MainActivity.this, "Connected to WiFi", Toast.LENGTH_SHORT).show();
                Log.d("WiFi", "Connected to WiFi");
                // 可以在这里执行网络相关的操作
            }

            @Override
            public void onUnavailable() {
                super.onUnavailable();
                // 无法连接到网络
                Toast.makeText(MainActivity.this, "Failed to connect to WiFi", Toast.LENGTH_SHORT).show();
                Log.d("WiFi", "Failed to connect to WiFi");
            }
        };

        ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        if (connectivityManager != null) {
            connectivityManager.requestNetwork(request, networkCallback);
        }
    }

    private void checkAndRequestPermissions() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
            if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
                    != PackageManager.PERMISSION_GRANTED) {
                ActivityCompat.requestPermissions(this,
                        new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
                        PERMISSIONS_REQUEST_CODE);
            }
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (requestCode == PERMISSIONS_REQUEST_CODE) {
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                Toast.makeText(this, "Location permission granted", Toast.LENGTH_SHORT).show();
            } else {
                Toast.makeText(this, "Location permission denied", Toast.LENGTH_SHORT).show();
            }
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        // 断开网络连接
        ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        if (connectivityManager != null && networkCallback != null) {
            connectivityManager.unregisterNetworkCallback(networkCallback);
        }
    }
}

以上代码中，我们首先在AndroidManifest.xml中添加了位置权限的声明，并在运行时动态请求该权限。在connectToWifi()方法中，我们创建了一个WifiNetworkSpecifier对象，并指定了要连接的WiFi的SSID和密码。然后，我们使用NetworkRequest来设置连接要求，并使用ConnectivityManager.requestNetwork()方法发起网络连接请求。最后，我们实现了一个NetworkCallback来处理网络连接的结果。

请注意，为了在Android Q中进行WiFi连接，你需要在AndroidManifest.xml文件中