JSON-RPC and Volley

JsonRpcRequest.java

import com.android.volley.Response;
import com.android.volley.toolbox.JsonRequest;

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

import java.util.UUID;

public abstract class JsonRpcRequest<T> extends JsonRequest<T> {
    private static final String JSONRPC_PARAM_ID = "id";
    private static final String JSONRPC_PARAM_METHOD = "method";
    private static final String JSONRPC_PARAM_PARAMETERS = "params";

    public JsonRpcRequest (final String url, final String method, final JSONObject jsonRequest,
                           final Response.Listener<T> listener,
                           final Response.ErrorListener errorListener) throws JSONException {
        super(Method.POST, url, new JSONObject() {
            {
                putOpt(JSONRPC_PARAM_ID, UUID.randomUUID().toString());
                putOpt(JSONRPC_PARAM_METHOD, method);
                putOpt(JSONRPC_PARAM_PARAMETERS, jsonRequest);
            }
        }.toString(), listener, errorListener);
    }
}

JsonRpcResponse.java

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

public class JsonRpcResponse {
    private static final String JSONRPC_PARAM_ID = "id";
    private static final String JSONRPC_PARAM_ERROR = "error";
    private static final String JSONRPC_PARAM_RESULT = "result";

    private String mId;
    private JSONObject mError;
    private JSONObject mResult;

    public JsonRpcResponse (final String jsonString) throws JSONException {
        final JSONObject jsonObject = new JSONObject(jsonString);

        mId = jsonObject.getString(JSONRPC_PARAM_ID);

        mError = jsonObject.optJSONObject(JSONRPC_PARAM_ERROR);

        if (mError != null) {
            return;
        }

        mResult = jsonObject.getJSONObject(JSONRPC_PARAM_RESULT);
    }

    public String getId () {
        return mId;
    }

    public JSONObject getError () {
        return mError;
    }

    public JSONObject getResult () {
        return mResult;
    }
}

How can i implement this in an activity? thank you :)