Android JSON POST方法

import android.os.AsyncTask;
import android.util.Log;

import org.json.JSONException;
import org.json.JSONObject;

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 JsonPostTask extends AsyncTask<String, Void, String> {

    private static final String TAG = "JsonPostTask";

    @Override
    protected String doInBackground(String... params) {
        String urlString = params[0];
        String jsonData = params[1];

        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(jsonData.getBytes());
            outputStream.flush();
            outputStream.close();

            int responseCode = connection.getResponseCode();
            if (responseCode == HttpURLConnection.HTTP_OK) {
                BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
                StringBuilder response = new StringBuilder();
                String line;
                while ((line = reader.readLine()) != null) {
                    response.append(line);
                }
                reader.close();
                return response.toString();
            } else {
                Log.e(TAG, "POST request failed. Response Code: " + responseCode);
            }
        } catch (IOException e) {
            Log.e(TAG, "Error during POST request: " + e.getMessage());
        }

        return null;
    }

    @Override
    protected void onPostExecute(String result) {
        if (result != null) {
            try {
                JSONObject responseJson = new JSONObject(result);
                // 处理返回的JSON数据
            } catch (JSONException e) {
                Log.e(TAG, "Error parsing JSON response: " + e.getMessage());
            }
        }
    }
}

String url = "https://example.com/api";
JSONObject postData = new JSONObject();
try {
    postData.put("key1", "value1");
    postData.put("key2", "value2");
} catch (JSONException e) {
    e.printStackTrace();
}

JsonPostTask task = new JsonPostTask();
task.execute(url, postData.toString());