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在Android中发送请求可以使用HttpClient库。以下是一个使用HttpClient发送GET请求的示例代码：
import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.util.ArrayList; import java.util.List; 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.HttpGet; import org.apache.http.client.methods.HttpPost; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.message.BasicNameValuePair; import org.apache.http.params.BasicHttpParams; import org.apache.http.params.HttpConnectionParams; import org.apache.http.params.HttpParams; import org.apache.http.protocol.HTTP; public class HttpClientExample { private static final int CONNECTION_TIMEOUT = 5000; private static final int SOCKET_TIMEOUT = 5000; public static String sendGetRequest(String url) throws IOException { // 创建HttpClient对象 HttpClient httpClient = new DefaultHttpClient(); // 创建HttpGet对象，并设置URL HttpGet httpGet = new HttpGet(url); // 设置超时时间 HttpParams httpParams = new BasicHttpParams(); HttpConnectionParams.setConnectionTimeout(httpParams, CONNECTION_TIMEOUT); HttpConnectionParams.setSoTimeout(httpParams, SOCKET_TIMEOUT); httpClient.setParams(httpParams); // 发送GET请求并获取响应 HttpResponse httpResponse = httpClient.execute(httpGet); HttpEntity httpEntity = httpResponse.getEntity(); InputStream inputStream = httpEntity.getContent(); // 将响应转换为字符串 BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream)); StringBuilder stringBuilder = new StringBuilder(); String line; while ((line = bufferedReader.readLine()) != null) { stringBuilder.append(line); } bufferedReader.close(); inputStream.close(); return stringBuilder.toString(); } public static String sendPostRequest(String url, List<NameValuePair> params) throws IOException { // 创建HttpClient对象 HttpClient httpClient = new DefaultHttpClient(); // 创建HttpPost对象，并设置URL HttpPost httpPost = new HttpPost(url); // 设置超时时间 HttpParams httpParams = new BasicHttpParams(); HttpConnectionParams.setConnectionTimeout(httpParams, CONNECTION_TIMEOUT); HttpConnectionParams.setSoTimeout(httpParams, SOCKET_TIMEOUT); httpClient.setParams(httpParams); // 设置POST请求的参数 httpPost.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8)); // 发送POST请求并获取响应 HttpResponse httpResponse = httpClient.execute(httpPost); HttpEntity httpEntity = httpResponse.getEntity(); InputStream inputStream = httpEntity.getContent(); // 将响应转换为字符串 BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream)); StringBuilder stringBuilder = new StringBuilder(); String line; while ((line = bufferedReader.readLine()) != null) { stringBuilder.append(line); } bufferedReader.close(); inputStream.close(); return stringBuilder.toString(); } } 你可以使用sendGetRequest()方法发送GET请求，使用sendPostRequest()方法发送POST请求。传递的URL参数和POST请求的参数可以使用NameValuePair对象传递。
