下面是一个使用Java代码的示例，演示如何在Android 10上启用WiFi并连接到特定的WiFi网络。

首先，在AndroidManifest.xml文件中添加以下权限：

接下来，在您的活动类中，您可以使用以下代码来启用WiFi并连接到特定的WiFi网络：

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.util.Log;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "MainActivity";
    private static final String SSID = "YourWiFiSSID";
    private static final String PASSWORD = "YourWiFiPassword";

    private ConnectivityManager.NetworkCallback networkCallback;
    private WifiManager wifiManager;

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

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

        // 检查WiFi状态并启用WiFi
        if (!wifiManager.isWifiEnabled()) {
            wifiManager.setWifiEnabled(true);
        }

        // 连接到指定的WiFi网络
        connectToWifiNetwork();
    }

    private void connectToWifiNetwork() {
        // 在Android 10及以上版本中，需要使用NetworkCallback来监听网络连接状态
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
            ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);

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

            networkCallback = new ConnectivityManager.NetworkCallback() {
                @Override
                public void onAvailable(Network network) {
                    super.onAvailable(network);

                    // 创建WiFi网络配置
                    WifiConfiguration wifiConfiguration = new WifiConfiguration();
                    wifiConfiguration.SSID = "\"" + SSID + "\"";
                    wifiConfiguration.preSharedKey = "\"" + PASSWORD + "\"";

                    // 添加并连接到WiFi网络
                    int networkId = wifiManager.addNetwork(wifiConfiguration);
                    wifiManager.disconnect();
                    wifiManager.enableNetwork(networkId, true);
                    wifiManager.reconnect();

                    Log.d(TAG, "Connected to WiFi network: " + SSID);
                    Toast.makeText(MainActivity.this, "Connected to WiFi network: " + SSID, Toast.LENGTH_SHORT).show();

                    // 取消网络回调注册
                    connectivityManager.unregisterNetworkCallback(networkCallback);
                }

                @Override
                public void onUnavailable() {
                    super.onUnavailable();

                    Log.e(TAG, "Failed to connect to WiFi network: " + SSID);
                    Toast.makeText(MainActivity.this, "Failed to connect to WiFi network: " + SSID, Toast.LENGTH_SHORT).show();

                    // 取消网络回调注册
                    connectivityManager.unregisterNetworkCallback(networkCallback);
                }
            };

            connectivityManager.requestNetwork(builder.build(), networkCallback);
        } else {
            // 在Android 10以下版本中，可以直接连接到WiFi网络
            WifiConfiguration wifiConfiguration = new WifiConfiguration();
            wifiConfiguration.SSID = "\"" + SSID + "\"";
            wifiConfiguration.preSharedKey = "\"" + PASSWORD + "\"";

            int networkId = wifiManager.addNetwork(wifiConfiguration);
            wifiManager.disconnect();
            wifiManager.enableNetwork(networkId, true);
            wifiManager.reconnect();

            Log.d(TAG, "Connected to WiFi network: " + SSID);
            Toast.makeText(MainActivity.this, "Connected to WiFi network: " + SSID, Toast.LENGTH_SHORT).show();
        }
    }
}

请注意，您需要将YourWiFiSSID和YourWiFiPassword替换为实际的WiFi网络名称和密码。

此代码首先检查WiFi状态并启用WiFi，然后使用ConnectivityManager和NetworkCallback在Android 10及以上版本中监听网络连接状态。在连接到WiFi网络后，它将使用WifiConfiguration来创建WiFi网络配置，并使用WifiManager将设备连接到指定的WiFi网络。

希望这可以帮助到您！