如何在android浏览器中获取字符串形式的html文档

import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.webkit.WebView;
import android.webkit.WebViewClient;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class MainActivity extends AppCompatActivity {

    private WebView webView;

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

        webView = findViewById(R.id.webView);
        webView.setWebViewClient(new MyWebViewClient());
        webView.loadUrl("https://www.example.com");
    }

    private class MyWebViewClient extends WebViewClient {
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            new GetHtmlTask().execute(url);
            return true;
        }
    }

    private class GetHtmlTask extends AsyncTask<String, Void, String> {
        @Override
        protected String doInBackground(String... urls) {
            String html = "";
            try {
                URL url = new URL(urls[0]);
                HttpURLConnection connection = (HttpURLConnection) url.openConnection();
                connection.setRequestMethod("GET");

                InputStream inputStream = connection.getInputStream();
                BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
                StringBuilder stringBuilder = new StringBuilder();
                String line;
                while ((line = reader.readLine()) != null) {
                    stringBuilder.append(line);
                }
                html = stringBuilder.toString();

                reader.close();
                inputStream.close();
                connection.disconnect();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return html;
        }

        @Override
        protected void onPostExecute(String html) {
            // 在这里可以使用获取到的html字符串进行后续处理
        }
    }
}