В прокрутке добавить еще данные json в listView

Question

Я сделал один ListView с изображением и текстом. Я могу разобрать json data в ListView. Но мое требование состоит в том, чтобы загрузить 10 строк данных Json, а затем в нижней части есть загрузить больше., чтобы получить следующий 10, и т.д. и т.п. Предложите мне, если кто-нибудь знает решение, используя JSON, пожалуйста ...

• Вот мой код Adapter.java

  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; 
      } 
  } 
  

• Здесь это код MainActivity.java

  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); 
  
        } 
       }); 
      } 
  
  } 
  

Answer 1

Настройка вашего adapter.setNotifysetchanged() будет отображать добавленные элементы в вашей ListView Здесь я дать вам пример того, что, как интегрировать нагрузку более с ListView

1.example

2.Costum Load more listview