如何在android http POST中添加参数？

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 java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    private static final String URL = "http://example.com/api"; // 替换为实际的URL

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

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

        // 创建HttpPost对象
        HttpPost httpPost = new HttpPost(URL);

        try {
            // 创建参数列表
            List<NameValuePair> params = new ArrayList<>();
            params.add(new BasicNameValuePair("param1", "value1"));
            params.add(new BasicNameValuePair("param2", "value2"));

            // 将参数转换为UrlEncodedFormEntity对象
            UrlEncodedFormEntity entity = new UrlEncodedFormEntity(params);

            // 设置编码方式
            entity.setContentEncoding("UTF-8");

            // 设置HttpPost对象的实体
            httpPost.setEntity(entity);

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

            // 获取服务器的响应
            InputStream inputStream = response.getEntity().getContent();
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
            StringBuilder stringBuilder = new StringBuilder();
            String line;
            while ((line = bufferedReader.readLine()) != null) {
                stringBuilder.append(line);
            }
            String responseString = stringBuilder.toString();

            // 处理服务器的响应
            // ...

        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}