我用图像和文字制作了一个ListView。我能够在ListView中解析 json数据。但我的要求是加载10行Json数据，然后在底部有加载更多。以获得下一个10等等。
建议我，如果有人知道使用json的解决方案，请...
以下是 Adapter.java
的代码public class LazyAdapter extends BaseAdapter {
private Activity activity;
private ArrayList<HashMap<String, String>> data;
private static LayoutInflater inflater=null;
public ImageLoader imageLoader;
public LazyAdapter(Activity a, ArrayList<HashMap<String, String>> d) {
activity = a;
data=d;
inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
imageLoader=new ImageLoader(activity.getApplicationContext());
}
public int getCount() {
return data.size();
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
View vi=convertView;
if(convertView==null)
vi = inflater.inflate(R.layout.list_row, null);
TextView title = (TextView)vi.findViewById(R.id.title); // title
TextView artist = (TextView)vi.findViewById(R.id.artist); // artist name
TextView duration = (TextView)vi.findViewById(R.id.duration); // duration
ImageView thumb_image=(ImageView)vi.findViewById(R.id.list_image);
ImageView thumb_image1=(ImageView)vi.findViewById(R.id.imageView1);// thumb image
HashMap<String, String> song = new HashMap<String, String>();
song = data.get(position);
// Setting all values in listview
title.setText(song.get(CustomizedListView.USER_NAME));
artist.setText(song.get(CustomizedListView.KEY_ARTIST));
duration.setText(song.get(CustomizedListView.KEY_DURATION));
imageLoader.DisplayImage(song.get(CustomizedListView.KEY_THUMB_URL), thumb_image);
imageLoader.DisplayImage(song.get(CustomizedListView.KEY_THUMB_URL1), thumb_image1);
return vi;
}
}
以下是 MainActivity.java
的代码public class CustomizedListView extends Activity {
// All static variables
static final String URL = XXXX.json;
//private static String URL;
// XML node keys
static final String KEY_SONG = "review_full"; // parent node
static final String KEY_ID = "activity_id";
static final String USER_NAME = "user_name";
static final String KEY_ARTIST = "review_small";
static final String KEY_DURATION = "time";
static final String KEY_THUMB_URL = "thumb";
static final String KEY_THUMB_URL1 = "photo";
String type;
String user_name1;
String thumbnail;
String subscriber_name;
String review_full;
String status;
String photo;
ListView list;
String review_small;
LazyAdapter adapter;
String[] image;
ArrayList<HashMap<String, String>> songsList;
public String image1=null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//Intent intent1 = getIntent();
//String easyPuzzle = intent1.getExtras().getString("Id");
//URL=URL0+easyPuzzle;
songsList = new ArrayList<HashMap<String, String>>();
JSONParser jParser = new JSONParser();
JSONObject json = jParser.getJSONFromUrl(URL);
try{
Log.d("Parsing JSON Data", "Before json1 try2");
JSONArray activities = json.getJSONArray("activities");
Log.d("Parsing JSON Data", "after activiti");
for (int i = 0; i < activities.length(); i++) {
JSONObject c = activities.getJSONObject(i);
image=new String[2];
Log.d("Parsing JSON Data", "inside for loop");
HashMap<String, String> map = new HashMap<String, String>();
//checking type content
type=c.getString("type");
if(type.contains("user")){
user_name1=c.getString( USER_NAME);
thumbnail=c.getString(KEY_THUMB_URL);
map.put(KEY_THUMB_URL, thumbnail);
map.put(USER_NAME, user_name1+" "+"joined etable community");
map.put(KEY_DURATION, c.getString( KEY_DURATION));
// map.put(KEY_ARTIST,null);
}else if(type.contains("checkin")){
user_name1=c.getString( USER_NAME);
subscriber_name=c.getString("subscriber_name");
thumbnail=c.getString(KEY_THUMB_URL);
photo=c.getString("photo");
if(photo.contains("False")){
image1="False";
map.put(KEY_THUMB_URL1, image1);
}else{
image = photo.split("image=");
image1=image[1];
map.put(KEY_THUMB_URL1, image1);
}
map.put(KEY_THUMB_URL, thumbnail);
map.put(USER_NAME, user_name1+" "+"was spotted at"+" "+subscriber_name);
map.put(KEY_DURATION, c.getString( KEY_DURATION));
// map.put(KEY_ARTIST,null);
}else if(type.contains("favorite")){
subscriber_name=c.getString("subscriber_name");
user_name1=c.getString( USER_NAME);
thumbnail=c.getString(KEY_THUMB_URL);
map.put(KEY_THUMB_URL, thumbnail);
map.put(USER_NAME, user_name1+" "+"favorited"+" "+subscriber_name);
map.put(KEY_DURATION, c.getString( KEY_DURATION));
//map.put(KEY_ARTIST,null);
}else if(type.contains("review")){
subscriber_name=c.getString("subscriber_name");
user_name1=c.getString( USER_NAME);
review_small=c.getString("review_small");
review_full=c.getString("review_full");
thumbnail=c.getString(KEY_THUMB_URL);
map.put(KEY_THUMB_URL, thumbnail);
map.put(USER_NAME, user_name1+" "+"wrote a review for"+" "+subscriber_name);
map.put(KEY_DURATION, c.getString( KEY_DURATION));
map.put(KEY_ARTIST,review_small);
map.put(KEY_SONG,review_full);
}else if(type.contains("status")){
user_name1=c.getString( USER_NAME);
status=c.getString("full_status");
thumbnail=c.getString(KEY_THUMB_URL);
map.put(KEY_THUMB_URL, thumbnail);
map.put(USER_NAME, user_name1+" "+"says\n"+" "+status);
map.put(KEY_DURATION, c.getString( KEY_DURATION));
//map.put(KEY_ARTIST,null);
}else{
user_name1=c.getString( USER_NAME);
map.put(USER_NAME, user_name1+" "+"some problem");
//map.put(KEY_ARTIST,null);
}
// adding HashList to ArrayList
songsList.add(map);
}}catch (JSONException e) {
e.printStackTrace();
}
list=(ListView)findViewById(R.id.list);
// Getting adapter by passing xml data ArrayList
adapter=new LazyAdapter(this, songsList);
list.setAdapter(adapter);
list.invalidateViews();
// Click event for single list row
list.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
list.invalidateViews();
Log.d("Parsing JSON Data", "start click");
HashMap<String, String> map = songsList.get(position);
Intent in = new Intent(CustomizedListView.this, LargeView.class);
in.putExtra("text", map.get(USER_NAME));
in.putExtra("image", map.get(KEY_THUMB_URL));
in.putExtra("review", map.get(KEY_SONG));
Log.d("Parsing JSON Data", "inside profile33");
startActivity(in);
Log.d("Parsing JSON Data", USER_NAME);
}
});
}
}
答案 0 :(得分：2)
设置你的adapter.setNotifysetchanged（）将在你的ListView中显示添加的项目在这里，我举一个例子，说明如何将更多的负载与ListView集成