Question

我指的是这个tuto link。我想在这个网格视图中从服务器获取json数据。请告诉我如何解析数据。加上我需要缓存那些图像..使用凌空库等。你可以提供解析的任何链接我们的tuto ???请快速建议我

Answer 1

使用Volley解析您的数据可以这样实现：

创建类VolleyService 公共课VolleyService {

private static VolleyService instance;
private RequestQueue requestQueue;
private ImageLoader imageLoader;

private VolleyService(Context context) {
    requestQueue = Volley.newRequestQueue(context);

    imageLoader = new ImageLoader(requestQueue, new ImageLoader.ImageCache() {
        private final LruCache<String, Bitmap> cache = new LruCache<String, Bitmap>(20);

        @Override
        public Bitmap getBitmap(String url) {
            return cache.get(url);
        }

        @Override
        public void putBitmap(String url, Bitmap bitmap) {
            cache.put(url,bitmap);
        }
    });
}

public static VolleyService getInstance(Context context) {
    if (instance == null) {
        instance = new VolleyService(context);
    }
    return instance;
}

public RequestQueue getRequestQueue() {
    return requestQueue;
}

public ImageLoader getImageLoader() {
    return imageLoader;
}

}

像这样使用它来创建请求并获取URL的JSON响应：

RequestQueue queue =

    VolleyService.getInstance(this.getContext()).getRequestQueue();    
    StringRequest request = new StringRequest(url, new 
    Response.Listener<String>() {
        @Override
        public void onResponse(String response) {
            // we got the response, now our job is to handle it
            try {
                updateArticleData(response, syncResult,categoryID);
            } catch (RemoteException | OperationApplicationException e) {
                e.printStackTrace();
            }
        }
    }, new Response.ErrorListener() {

        @Override
        public void onErrorResponse(VolleyError error) {
            //something happened, treat the error.
            Log.e("Error", error.toString());
        }
    });

    queue.add(request);

Mehod getJsonFromResponse（回复）：

 private SomeClass getDataFromJson(String json) {     
    //Do sth with json    
    return someData;
}

将Json数据解析为具有RecyclerView的网格视图

1 个答案: