如何用指定的POST参数打开android浏览器？

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

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

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);

        // 设置WebView的WebViewClient
        webView.setWebViewClient(new WebViewClient());

        // 获取WebView的WebSettings对象
        WebSettings webSettings = webView.getSettings();

        // 启用JavaScript
        webSettings.setJavaScriptEnabled(true);

        // 创建HttpPost对象
        HttpPost httpPost = new HttpPost("http://example.com");

        // 设置POST参数
        List<NameValuePair> params = new ArrayList<>();
        params.add(new BasicNameValuePair("param1", "value1"));
        params.add(new BasicNameValuePair("param2", "value2"));

        try {
            // 将POST参数编码为URL编码格式
            httpPost.setEntity(new UrlEncodedFormEntity(params));
        } catch (IOException e) {
            e.printStackTrace();
        }

        // 创建HttpClient对象
        HttpClient httpClient = new DefaultHttpClient();

        try {
            // 执行HttpPost请求
            HttpResponse response = httpClient.execute(httpPost);

            // 获取服务器返回的响应结果
            HttpEntity entity = response.getEntity();
            String htmlResponse = EntityUtils.toString(entity);

            // 将响应结果加载到WebView中显示
            webView.loadData(htmlResponse, "text/html", "UTF-8");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}