如何从 jsonarray 解析图像并使用 Picasso 显示

Question

我必须解析具有 3 个图像链接的键 "im:image" 的 JSONArray，并使用 Picasso 库显示它。

有什么想法吗？提前致谢。

Answer 1

尝试以下方法

try {
    JSONObject jsonFeed = new JSONObject(your_original_json).getJSONObject("feed");
    JSONArray entries = jsonFeed.getJSONArray("entry");
    int count = entries.length();
    for (int i = 0; i < count; i++) {
        JSONObject imageJson = entries.getJSONObject(i).getJSONObject("im:image");
        // in case you want to get image with height 53
        String imageUrl = imageJson.getJSONObject("0").getString("label");

        // String imageUrl = imageJson.getJSONObject("1").getString("label"); height 75
        // String imageUrl = imageJson.getJSONObject("2").getString("label"); height 100
        Picasso.with(context)
                .load(imageUrl)
                .into(imageView);
    }
} catch (JSONException e) {
    e.printStackTrace();
}

Answer 2

您必须使用 HttpClient 从您的 URL 获取 Json。下面的代码。

 try{

            HttpClient httpclient = new DefaultHttpClient();
            HttpPost httppost = new HttpPost("https://itunes.apple.com/jo/rss/topfreeapplications/limit=50/json");
            HttpResponse response = httpclient.execute(httppost);
            HttpEntity entity = response.getEntity();
            InputStream weps = entity.getContent();
            try {

                BufferedReader reader = new BufferedReader(new InputStreamReader(weps, "iso-8859-1"), 8);
                StringBuilder sb = new StringBuilder();
                String line = null;
                while ((line = reader.readLine()) != null) {
                    sb.append(line + "\n");
                }
                weps.close();
                result = sb.toString();//result string defined above will store your json.

            } catch (Exception e) {
                Log.e("log_tag", "Error Coverting result" + e.toString());
            }
        } catch (Exception e) {
            Log.e("log_tag", "Error Http connection" + e.toString());
            }

        try {

            JSONArray entries = new JSONArray(result);
            int count = entries.length();
            for (int i = 0; i < count; i++) {

            JSONObject imageJson= entries.getJSONObject(i).getJSONObject("im:image");
            // in case you want to get image with height 53
            String imageUrl = imageJson.getJSONObject("0").getString("label");

            // String imageUrl = imageJson.getJSONObject("1").getString("label"); height 75
            // String imageUrl = imageJson.getJSONObject("2").getString("label"); height 100
            Picasso.with(context)//context variable of the class
            .load(imageUrl)// url from Json
            .into(imageView); //your image view object
            }
        } catch (Exception e) {
            Log.e("log_tag", "Error Parsing Dataaaa" + e.toString());

        }

如何从 jsonarray 解析图像并使用 Picasso 显示

How to parse image from jsonarray and display using Picasso

android

json

picasso