问如何在Android Studio中使用URL调用web api函数？

EN

protected Boolean doInBackground(Void... params) {
        // TODO: attempt authentication against a network service.

        try {
            // Create URL
            url = baseUrl + "signin?username=" + mEmail + "&password=" + mPassword + "&remember_me=true&accept_terms=true";

            // Next, we create a new JsonArrayRequest. This will use Volley to make a HTTP request
            // that expects a JSON Array Response.
            // To fully understand this, I'd recommend readng the office docs: https://developer.android.com/training/volley/index.html
            JsonArrayRequest arrReq = new JsonArrayRequest(Request.Method.GET, url,
                    new Response.Listener<JSONArray>() {
                        @Override
                        public void onResponse(JSONArray response) {
                            // Check the length of our response 
                            if (response.length() > 0) {
                                for (int i = 0; i < response.length(); i++) {
                                    try {
                                        JSONObject jsonObj = response.getJSONObject(i);
                                        String repoName = jsonObj.get("name").toString();
                                        String lastUpdated = jsonObj.get("updated_at").toString();
                                    } catch (JSONException e) {
                                        // If there is an error then output this to the logs.
                                        Log.e("Volley", "Invalid JSON Object.");
                                    }

                                }
                            } else {
                            }

                        }
                    },

                    new Response.ErrorListener() {
                        @Override
                        public void onErrorResponse(VolleyError error) {
                            // If there a HTTP error then add a note to our repo list.
                            Log.e("Volley", error.toString());
                        }
                    }
            );
            // Add the request we just defined to our request queue.
            // The request queue will automatically handle the request as soon as it can.
            requestQueue.add(arrReq);
            // Simulate network access.
            Thread.sleep(2000);
        } catch (InterruptedException e) {
            return false;
        }

        for (String credential : DUMMY_CREDENTIALS) {
            String[] pieces = credential.split(":");
            if (pieces[0].equals(mEmail)) {
                // Account exists, return true if the password matches.
                return pieces[1].equals(mPassword);
            }
        }

        // TODO: register the new account here.
        return false;
    }