Question

当我从我的api从POST方法转到GET方法时尝试获取我的文章时我被卡住了...我尝试更改“Request.Method.GET”但仍然无法工作..我也尝试使用GET方法来自其他帖子的凌空但我不知道如何得到我所有的“category_id”....下面是我的代码：

public void getPosts(){

        if(refreshed || articleList.size() == 0) {
            swipeContainer.setVisibility(View.GONE);
            loadingPanel.setVisibility(View.VISIBLE);
        }
        String apiLink;

//        if(nextUrl != null)
//            apiLink = nextUrl;
//        else
            apiLink = api.getArticlesByCategoryAPI();

        pulling = true;

        final HashMap<String, String> postParams = new HashMap<String, String>();
        postParams.put("secret_key", api.getSecretKey());
        postParams.put("id", String.valueOf(categoryId));

        RequestQueue queue = Volley.newRequestQueue(getContext());

        JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.GET, apiLink, new JSONObject(postParams),
                new Response.Listener<JSONObject>() {
                    @Override
                    public void onResponse(JSONObject response) {

                        Log.d("object", "test here");

                        try {
                            JSONObject resultObj = response.getJSONObject("articles");
                            JSONObject categoryObj = response.getJSONObject("article_category");
                            JSONArray articlesObj = resultObj.getJSONArray("data");

                            if (articlesObj.length() > 0) {

                                totalArticle = resultObj.getInt("total");
                                Log.d("totalarticle", String.valueOf(totalArticle));

                                articleList.clear();

                                for (int x = 0; x < articlesObj.length(); x++) {

                                    if(x == 19){
                                        break;
                                    }

                                    JSONObject articleObj = articlesObj.getJSONObject(x);

                                    Article article = new Article();

                                    Category category = new Category();

                                    article.setId(articleObj.getInt("id"));
                                    article.setTitle(articleObj.getString("title"));
                                    article.setStandFirst(articleObj.getString("standfirst"));
                                    article.setContent(articleObj.getString("content_html"));
                                    article.setThumbnail(articleObj.getString("banner_url_thumb"));
//                                    article.setViewCount(articleObj.getInt("view_count"));
                                    article.setDatePublished(articleObj.getString("date_publish_web"));
                                    article.setUrl(articleObj.getString("url"));
                                    articleList.add(article);

                                    Log.d("listsize", String.valueOf(articleList.size()));

                                    adapter.notifyDataSetChanged();

                                    category.setId(categoryObj.getInt("id"));
                                    category.setName(categoryObj.getString("name"));
                                    category.setStatus(categoryObj.getString("status"));
                                    article.setCategory(category);


                                }

                                swipeContainer.setVisibility(View.VISIBLE);
                                loadingPanel.setVisibility(View.GONE);

                                if (refreshed) {
                                    swipeContainer.setRefreshing(false);
                                    refreshed = false;
                                }

                                totalItemCount = 0;
                                adapter.notifyDataSetChanged();

                                pulling = false;

//                                if(resultObj.has("next_page_url") && !resultObj.getString("next_page_url").equals("null")) {
//                                    nextUrl = resultObj.getString("next_page_url");
//                                } else {
//                                    nextUrl = null;
//                                }

                                addScroll();

                            } else {
                                // something to do if zero result
                                System.out.println("ZERO RESULT");
                            }

                        } catch (JSONException e) {
                            System.out.println("FAILED PARSE RESULT: " + e.getMessage());
                            Log.d("cantparse" , e.getMessage());
                        }

                        adapter.notifyDataSetChanged();
                    }
                },
                new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {
                        Toast.makeText(getContext(), "Slow network connection", Toast.LENGTH_SHORT).show();
                        System.out.println(error.toString());
                        loader.hide();
                    }
                }) {

            @Override
            public String getBodyContentType() {
                return "application/json; charset=utf-8";
            }

            @Override
            public Map<String, String> getHeaders() throws AuthFailureError {
                Map<String, String> params = new HashMap<String, String>();
                params.put("Accept", "application/json");
//                params.put("Authorization", "Bearer "+token);

                return params;
            }

        };

        queue.add(jsonObjectRequest);

以下是PAW的api

Answer 1

它不起作用的原因是当您发送GET请求时，您需要在实际URL中包含参数：

“http://www.yayayayyay.com/params.php?param1=blah&param2=derp3”

对于POST请求，参数以不同的方式发送，这就是您在代码中使用此参数的原因：

final HashMap postParams = new HashMap（）;

如果您正在使用GET，则不需要该代码。

Here是一些很好的信息。

此外，在我看来，如果您控制服务器，并且POST正在运行，那么除非您有理由不使用它，否则没有任何问题。

Answer 2

我将代码更改为

public void getPosts(){

        if(refreshed || articleList.size() == 0) {
            swipeContainer.setVisibility(View.GONE);
            loadingPanel.setVisibility(View.VISIBLE);
        }
        String apiLink;

        if(nextUrl != null)
            apiLink = nextUrl;
        else
            apiLink = api.getArticlesByCategoryAPI()+categoryId;

            Log.d("apilink", apiLink);

        pulling = true;

//        final HashMap<String, String> postParams = new HashMap<String, String>();
//        postParams.put("secret_key", api.getSecretKey());
//        postParams.put("id", String.valueOf(categoryId));

        RequestQueue queue = Volley.newRequestQueue(getContext());

        JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.GET, apiLink, null,
                new Response.Listener<JSONObject>() {
                    @Override

Answer 3

这是最好的Volley示例（我更喜欢），使用齐射可以更好地控制GET和POST方法。

Volley With Get/Post Method

控制器类可帮助您管理 GET / POST 请求。您可以使用两行代码调用Web服务（API）。< / p>

如果你发现一些令你困惑的事情，那么你可以在这个例子中问我任何事情。

希望它会对你有所帮助。

使用GET方法“Volley”解析JSON对象

3 个答案: