如何在Android Java中发布json数据？

JSONObject json = new JSONObject();
json.put("name", "John");
json.put("age", 25);

String jsonString = json.toString();

OkHttpClient client = new OkHttpClient();
RequestBody body = RequestBody.create(MediaType.parse("application/json"), jsonString);
Request request = new Request.Builder()
        .url("http://example.com/api")
        .post(body)
        .build();

try {
    Response response = client.newCall(request).execute();
    // 处理服务器响应
} catch (IOException e) {
    e.printStackTrace();
}