针对android的React Native fetch()网络请求失败？

<uses-permission android:name="android.permission.INTERNET" />

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

try {
    TrustManager[] trustAllCerts = new TrustManager[] {
        new X509TrustManager() {
            public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {}
            public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {}
            public X509Certificate[] getAcceptedIssuers() {
                return new X509Certificate[0];
            }
        }
    };

    SSLContext sslContext = SSLContext.getInstance("TLS");
    sslContext.init(null, trustAllCerts, new java.security.SecureRandom());
    HttpsURLConnection.setDefaultSSLSocketFactory(sslContext.getSocketFactory());
    HttpsURLConnection.setDefaultHostnameVerifier((hostname, session) -> true);
} catch (Exception e) {
    e.printStackTrace();
}

response.setHeader("Access-Control-Allow-Origin", "*");
response.setHeader("Access-Control-Allow-Methods", "GET, POST, OPTIONS");
response.setHeader("Access-Control-Allow-Headers", "Content-Type");

fetch(url, {
    timeout: 10000 // 设置超时时间为10秒
})
.then(response => response.json())
.then(data => {
    // 处理响应数据
})
.catch(error => {
    // 处理错误
});