在Android上使用SSID和密码连接Wi-Fi需要进行以下步骤：

1. 添加必要的权限到AndroidManifest.xml文件中：

2. 在Activity或Fragment中实现以下代码：

import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiManager;
import android.content.Context;

public class WifiConnector {
    private WifiManager wifiManager;
    
    public WifiConnector(Context context) {
        wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
    }
    
    public boolean connectToWifi(String ssid, String password) {
        if (!wifiManager.isWifiEnabled()) {
            wifiManager.setWifiEnabled(true);
        }
        
        WifiConfiguration wifiConfig = new WifiConfiguration();
        wifiConfig.SSID = String.format("\"%s\"", ssid);
        wifiConfig.preSharedKey = String.format("\"%s\"", password);

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

        return true;
    }
}

3. 在需要连接Wi-Fi的地方调用connectToWifi方法：

WifiConnector wifiConnector = new WifiConnector(context);
wifiConnector.connectToWifi("YourSSID", "YourPassword");

请确保替换"YourSSID"和"YourPassword"为实际的Wi-Fi网络的SSID和密码。