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If url.pathname or url.searchParams is not a valid function in Android React Native, it means that you are not using the correct object or property to access the URL. Here are some possible solutions:

1. Make sure you have imported the correct module for parsing URLs. You can use the built-in URL module in Node.js or a third-party library such as query-string or url-parse. For example:

import { URL } from 'react-native-url-polyfill';
const url = new URL('https://example.com/path?query=string');
console.log(url.pathname); // "/path"
console.log(url.searchParams.get('query')); // "string"

1. If you are using a plain string as the URL, you need to manually extract the pathname and search parameters using string methods such as split or regex. For example:

const url = 'https://example.com/path?query=string';
const pathname = url.split('?')[0];
const searchParams = new URLSearchParams(url.split('?')[1]);
console.log(pathname); // "/path"
console.log(searchParams.get('query')); // "string"

1. If you are using an object that contains the URL properties, make sure that the object properties are correctly formatted. For example, the pathname should start with "/", and the search parameters should be in the format of "key=value". For example:

const url = { pathname: '/path', search: '?query=string' };
console.log(url.pathname); // "/path"
console.log(new URLSearchParams(url.search).get('query')); // "string"

By following these solutions, you should be able to access the URL properties correctly in Android React Native.