要在Android Volley中动态绕过证书验证，可以通过创建一个自定义的HurlStack来实现。以下是一个示例代码：

1. 创建一个自定义的HurlStack类，继承自Volley的HurlStack类：

import com.android.volley.toolbox.HurlStack;

import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

public class CustomHurlStack extends HurlStack {

    private final SSLSocketFactory sslSocketFactory;
    private final X509TrustManager trustManager;

    public CustomHurlStack() {
        this.sslSocketFactory = createSSLSocketFactory();
        this.trustManager = createTrustManager();
    }

    @Override
    protected HttpURLConnection createConnection(URL url) throws IOException {
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        if (connection instanceof HttpsURLConnection) {
            HttpsURLConnection httpsURLConnection = (HttpsURLConnection) connection;
            httpsURLConnection.setSSLSocketFactory(sslSocketFactory);
            httpsURLConnection.setHostnameVerifier(new HostnameVerifier() {
                @Override
                public boolean verify(String hostname, SSLSession session) {
                    return true; // 绕过主机名验证
                }
            });
        }
        return connection;
    }

    private SSLSocketFactory createSSLSocketFactory() {
        try {
            SSLContext sslContext = SSLContext.getInstance("TLS");
            sslContext.init(null, new TrustManager[]{trustManager}, new SecureRandom());
            return sslContext.getSocketFactory();
        } catch (NoSuchAlgorithmException | KeyManagementException e) {
            e.printStackTrace();
        }
        return null;
    }

    private X509TrustManager createTrustManager() {
        return new X509TrustManager() {
            @Override
            public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
            }

            @Override
            public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
            }

            @Override
            public X509Certificate[] getAcceptedIssuers() {
                return new X509Certificate[0];
            }
        };
    }
}

2. 使用CustomHurlStack替换Volley的默认HurlStack：

RequestQueue requestQueue = Volley.newRequestQueue(context, new CustomHurlStack());

通过以上代码，你可以实现在Android Volley中动态绕过证书验证。请注意，绕过证书验证可能会导致安全风险，请谨慎使用。