如何在android volley库中发送嵌套JSON作为post参数

dependencies {
    implementation 'com.android.volley:volley:1.2.0'
}

JSONObject nestedJson = new JSONObject();
try {
    nestedJson.put("key1", "value1");
    nestedJson.put("key2", "value2");
} catch (JSONException e) {
    e.printStackTrace();
}

JSONObject mainJson = new JSONObject();
try {
    mainJson.put("nestedJson", nestedJson);
} catch (JSONException e) {
    e.printStackTrace();
}

String url = "http://example.com/api";
JsonObjectRequest request = new JsonObjectRequest(Request.Method.POST, url, mainJson,
        new Response.Listener<JSONObject>() {
            @Override
            public void onResponse(JSONObject response) {
                // 处理响应
            }
        },
        new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                // 处理错误
            }
        });

RequestQueue requestQueue = Volley.newRequestQueue(context);
requestQueue.add(request);