如何使用Volley在REST请求中添加header和body？

public class CustomRequest extends Request<JSONObject> {
    // ...

    @Override
    public Map<String, String> getHeaders() throws AuthFailureError {
        Map<String, String> headers = new HashMap<>();
        headers.put("Authorization", "Bearer YourToken");
        headers.put("Content-Type", "application/json");
        return headers;
    }
}

RequestQueue requestQueue = Volley.newRequestQueue(context);
CustomRequest request = new CustomRequest(Request.Method.GET, url, null,
        new Response.Listener<JSONObject>() {
            @Override
            public void onResponse(JSONObject response) {
                // 处理响应数据
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                // 处理请求错误
            }
        });
requestQueue.add(request);

public class CustomRequest extends Request<JSONObject> {
    private byte[] body;

    public CustomRequest(int method, String url, byte[] body,
            Response.Listener<JSONObject> listener, Response.ErrorListener errorListener) {
        super(method, url, errorListener);
        this.body = body;
        // ...
    }

    // ...

    @Override
    public byte[] getBody() throws AuthFailureError {
        return body;
    }

    @Override
    public String getBodyContentType() {
        return "application/json";
    }
}

RequestQueue requestQueue = Volley.newRequestQueue(context);
byte[] body = ...;  // 构造请求的body内容
CustomRequest request = new CustomRequest(Request.Method.POST, url, body,
        new Response.Listener<JSONObject>() {
            @Override
            public void onResponse(JSONObject response) {
                // 处理响应数据
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                // 处理请求错误
            }
        });
requestQueue.add(request);