我正在使用 JSON 响应来解析标题、日期内容和缩略图图像并将其放置在列表视图中。我解析了在列表视图中获取的标题、日期、内容和名称，但是当我在循环中包含缩略图 json 解析以在列表视图中显示时，输出中没有显示任何内容。谁能帮助我如何解析 json 响应。JSON 响应在这里
//json response to parse
{
"status": "ok",
"posts": [
{
"id": 2498,
"title": "jigsaw lamp imported from thailand",
"content": "<p>Hi. It’s a invitation to have a look at a unique lamp shade called jigsaw lamp from thailand. Available in multi attractive colours.</p>\n",
"date": "2012-12-26 09:48:15",
"author": {
"name": "Tapas123456",
},
"attachments": [
{
"description": "",
"caption": "",
"mime_type": "image/jpeg",
"images": {
"thumbnail": {
"url": "http://site/wp-content/uploads/2012/12/646675-50x47.jpg",
}
}
},...............
以下代码用于将图像和数据添加到列表视图
public class CustomizedListView extends Activity {
JSONArray posts = null;
// All static variables
static final String URL = "website/ads/?json=get_recent_posts";
static final String KEY_POSTS = "posts";
static final String KEY_ID = "id";
static final String KEY_TITLE = "title";
static final String KEY_DATE = "date";
static final String KEY_CONTENT = "content";
static final String KEY_AUTHOR = "author";
static final String KEY_NAME = "name";
static final String KEY_ATTACHMENTS = "attachments";
static final String KEY_SLUG = "slug";
static final String KEY_THUMB_URL = "thumbnail";
static final String KEY_IMAGES = "images";
static final String KEY_URL = "url";
ListView list;
LazyAdapter adapter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ArrayList<HashMap<String, String>> songsList = new ArrayList<HashMap<String, String>>();
// Creating JSON Parser instance
JSONParser jParser = new JSONParser();
// getting JSON string from URL
JSONObject json = jParser.getJSONFromUrl(URL);
try {
JSONArray posts = json.getJSONArray(KEY_POSTS);
JSONArray attachments = json.getJSONArray(KEY_ATTACHMENTS);
// looping through all song nodes <song>
for(int i = 0; i < posts.length(); i++){
JSONObject c = posts.getJSONObject(i);
// Storing each json item in variable
String id = c.getString(KEY_ID);
String title = c.getString(KEY_TITLE);
String date = c.getString(KEY_DATE);
String content = c.getString(KEY_CONTENT);
//authornumber is agin JSON Object
JSONObject author = c.getJSONObject(KEY_AUTHOR);
String name = author.getString(KEY_NAME);
//loop
for(int j = 0; j < attachments.length(); j++){
JSONObject d = attachments.getJSONObject(j);
String slug = c.getString(KEY_SLUG);
JSONObject images = d.getJSONObject(KEY_IMAGES);
JSONObject thumbnail = images.getJSONObject(KEY_THUMB_URL);
String url = thumbnail.getString(KEY_URL);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(KEY_ID, id);
map.put(KEY_TITLE, title);
map.put(KEY_DATE, date);
map.put(KEY_NAME, name);
map.put(KEY_CONTENT, content);
map.put(KEY_SLUG, slug);
map.put(KEY_URL, url);
// adding HashList to ArrayList
songsList.add(map);
} }
} catch (JSONException e) {
e.printStackTrace();
}
list=(ListView)findViewById(R.id.list);
// Getting adapter by passing json data ArrayList
adapter=new LazyAdapter(this, songsList);
list.setAdapter(adapter);
// Click event for single list row
list.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
}
});
}
}
