要在Android Q中实现无需批准即可连接WiFi的功能，可以使用以下代码示例：

首先，在AndroidManifest.xml文件中添加以下权限：

然后，在需要连接WiFi的Activity或Fragment中使用以下代码：

import android.Manifest;
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.Network;
import android.net.NetworkCapabilities;
import android.net.NetworkRequest;
import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiManager;
import android.os.Build;
import android.os.Bundle;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.annotation.RequiresApi;
import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

    private WifiManager wifiManager;
    private ConnectivityManager.NetworkCallback networkCallback;

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

        wifiManager = (WifiManager) getApplicationContext().getSystemService(Context.WIFI_SERVICE);

        // 检查权限
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            requestPermissions(new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 1);
        }

        // 如果WiFi未启用，则启用WiFi
        if (!wifiManager.isWifiEnabled()) {
            wifiManager.setWifiEnabled(true);
        }

        // 创建一个NetworkCallback来监听网络连接状态
        networkCallback = new ConnectivityManager.NetworkCallback() {
            @Override
            public void onAvailable(@NonNull Network network) {
                super.onAvailable(network);
                // 连接到指定的WiFi网络
                connectToWifi("YourWiFiSSID", "YourWiFiPassword");
            }
        };

        // 注册网络连接回调
        ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkRequest networkRequest = new NetworkRequest.Builder()
                .addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
                .build();
        connectivityManager.registerNetworkCallback(networkRequest, networkCallback);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        // 注销网络连接回调
        ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        connectivityManager.unregisterNetworkCallback(networkCallback);
    }

    // 连接到指定的WiFi网络
    @RequiresApi(api = Build.VERSION_CODES.Q)
    private void connectToWifi(String ssid, String password) {
        WifiConfiguration wifiConfig = new WifiConfiguration();
        wifiConfig.SSID = "\"" + ssid + "\"";
        wifiConfig.preSharedKey = "\"" + password + "\"";
        wifiConfig.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);

        int networkId = wifiManager.addNetwork(wifiConfig);
        if (networkId != -1) {
            // 连接到指定的WiFi
            wifiManager.enableNetwork(networkId, true);
            wifiManager.reconnect();

            Toast.makeText(this, "WiFi连接成功", Toast.LENGTH_SHORT).show();
        } else {
            Toast.makeText(this, "WiFi连接失败", Toast.LENGTH_SHORT).show();
        }
    }
}

请注意，这段代码中的 "YourWiFiSSID" 和 "YourWiFiPassword" 部分需要根据实际情况替换为要连接的WiFi SSID和密码。

此代码确保在Android Q上连接到指定的WiFi网络时无需用户批准。