我尝试在下面分析此 json 表，源代码探针将显示文本，但我尝试从 json 表中的 url 加载的图像但图像不显示仅空白屏幕显示此图像http://imgur.com/hsYqtyd
{
"worldpopulation":
[
{
"rank":1,
"name": "BREAKFAST",
"url": "http://www.androidbegin.com/tutorial/flag/china.png"
},
{
"rank":2,
"name": "LUNCH ",
"url": "http://www.androidbegin.com/tutorial/flag/china.png"
},
{
"rank":3,
"name": "SUPPER",
"url": "http://www.androidbegin.com/tutorial/flag/china.png"
}
]
}
public void parseJSONData(){
//CategoryAPI = Utils.CategoryAPI+"?accesskey="+Utils.AccessKey;
CategoryAPI = Utils.CategoryAPI;
clearData();
try {
HttpClient client = new DefaultHttpClient();
HttpConnectionParams.setConnectionTimeout(client.getParams(), 15000);
HttpConnectionParams.setSoTimeout(client.getParams(), 15000);
HttpUriRequest request = new HttpGet(CategoryAPI);
HttpResponse response = client.execute(request);
InputStream atomInputStream = response.getEntity().getContent();
BufferedReader in = new BufferedReader(new
InputStreamReader(atomInputStream));
String line;
String str = "";
while ((line = in.readLine()) != null) {
str += line;
}
JSONObject json = new JSONObject(str);
JSONArray data = json.getJSONArray("worldpopulation");
for (int i = 0; i < data.length(); i++) {
JSONObject object = data.getJSONObject(i);
//JSONObject category = object.getJSONObject("Category");
Category_ID.add(Long.parseLong(object.getString("rank")));
Category_name.add(object.getString("name"));
Category_image.add(object.getString("url"));
Log.d("Category name", Category_name.get(i));
}
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
IOConnect = 1;
e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
class CategoryListAdapter extends BaseAdapter {
private Activity activity;
private ImageLoader imageLoader;
public CategoryListAdapter(Activity act) {
this.activity = act;
imageLoader = new ImageLoader(act);
}
public int getCount() {
// TODO Auto-generated method stub
return CategoryList.Category_ID.size();
}
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
ViewHolder holder;
if(convertView == null) {
LayoutInflater inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.category_list_item, null);
holder = new ViewHolder();
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.txtText = (TextView) convertView.findViewById(R.id.txtText);
holder.imgThumb = (ImageView)
convertView.findViewById(R.id.imgThumb);
holder.txtText.setText(CategoryList.Category_name.get(position));
imageLoader.DisplayImage(Utils.AdminPageURL+CategoryList.Category_image.get(position), activity, holder.imgThumb);
return convertView;
}
static class ViewHolder {
TextView txtText;
ImageView imgThumb;
}
}