在Android Studio中发送POST请求的代码如下:
import android.os.AsyncTask;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
public class PostRequestTask extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... params) {
String urlString = params[0];
String postData = params[1];
String response = "";
try {
URL url = new URL(urlString);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("POST");
connection.setRequestProperty("Content-Type", "application/json");
connection.setDoOutput(true);
OutputStream outputStream = connection.getOutputStream();
outputStream.write(postData.getBytes());
outputStream.flush();
outputStream.close();
int statusCode = connection.getResponseCode();
if (statusCode == HttpURLConnection.HTTP_OK) {
BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String line;
while ((line = reader.readLine()) != null) {
response += line;
}
reader.close();
} else {
response = "Error: " + statusCode;
}
connection.disconnect();
} catch (IOException e) {
e.printStackTrace();
response = "Error: " + e.getMessage();
}
return response;
}
@Override
protected void onPostExecute(String result) {
// 处理POST请求的响应结果
}
}
使用方法:
String url = "https://example.com/api";
String postData = "{\"key\": \"value\"}";
PostRequestTask task = new PostRequestTask();
task.execute(url, postData);
这段代码使用了AsyncTask
来在后台发送POST请求。其中,urlString
是目标URL,postData
是要发送的数据。在doInBackground
方法中,首先建立HttpURLConnection
连接,并设置请求方法为POST,设置请求头的Content-Type为application/json,然后将数据写入输出流。接着,获取响应的状态码,如果状态码为HTTP_OK(200),则读取响应内容并返回;否则,返回错误信息。最后,在onPostExecute
方法中处理POST请求的响应结果。
请注意,这只是一个简单的示例代码,实际使用中可能需要根据具体情况进行修改和完善。
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