Question

我喜欢布局中的按钮并设置文字＆＃34;如0＆＃34; ，我已经设置在基本适配器中，当我点击Like Buttton时，文本将增加而不刷新整个活动就像在Facebook应用程序中，我被困在三天，我已阅读并实现几乎每个stackoverflow的答案，但没有得到解决方案。我希望我会得到答案。这是My Base Adapter＆lt; -------＆gt;

public class FeedAdaptorView   extends BaseAdapter{

  ArrayList<HashMap<String, String>> data;

        HashMap<String, String> resultp = new HashMap<String, String>();
        String UserID;
     public FeedAdaptorView(Context context,
                ArrayList<HashMap<String, String>> arraylist, String uSERid2) {
            this.context = context;
            data = arraylist;

        }
        public class ViewHolder {
            TextView name,time,status,likecount;
            ImageView userimage,postimage;
            Button like,comment,share;

        }
        @Override
        public int getCount() {
            return data.size();
        }

        @Override
        public Object getItem(int position) {
            return null;
        }

        @Override
        public long getItemId(int position) {
            return position;
        }

        public View getView(final int position, View convertView, final ViewGroup parent) {


              if(convertView==null){
                  LayoutInflater inflater = ((Activity) context).getLayoutInflater();
                  convertView = inflater.inflate(R.layout.feed_item, null);
                  holder=new ViewHolder();
                  pos=getItemViewType(position);
                  holder.name = (TextView) convertView.findViewById(R.id.name);

                  holder.status=(TextView)convertView.findViewById(R.id.txtStatusMsg);
                  holder.userimage=(ImageView)convertView.findViewById(R.id.profilePic);
                  holder.postimage=(ImageView)convertView.findViewById(R.id.feedImage1);
                  holder.like=(Button)convertView.findViewById(R.id.like);
                  holder.comment=(Button)convertView.findViewById(R.id.comment);
                  holder.pos=position;

                  convertView.setTag(holder);
              }
              else {
                holder = (ViewHolder) convertView.getTag();
            }
              holder.like.setTag(pos);
         /*   inflater = (LayoutInflater) context
            holder.comment.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                  ((ListView) parent).performItemClick(v, position, 0);
            }
        });         .getSystemService(Context.LAYOUT_INFLATER_SERVICE);*/

       holder.comment.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                  ((ListView) parent).performItemClick(v, position, 0);
            }
        });
       holder.postimage.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                  ((ListView) parent).performItemClick(v, position, 0);
            }
        });
       holder.like.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                    Toast.makeText(context, "You Liked The Post", Toast.LENGTH_SHORT).show();

           holder.like.setText("Like"+"4");

           notifyDataSetChanged();
    // here i am calling the web services for like button update
   new likepost().execute();

            }
        });

＆LT; ---------------------------------＆GT;

webservice callin method
class likepost extends AsyncTask<Void, Void, Void> 
        {
            int flag=0;
         @Override
         protected void onPreExecute()
         {
          super.onPreExecute();
          // Create a progressdialog
          mProgressDialog = new ProgressDialog(context);
          // Set progressdialog message
          mProgressDialog.setMessage("Loading...");
          mProgressDialog.setIndeterminate(false);
          mProgressDialog.setCancelable(false);
          // Show progressdialog
          mProgressDialog.show();
         }

         @Override
         protected Void doInBackground(Void... args0) {
          List<NameValuePair> params = new ArrayList<NameValuePair>();


                   String Status="1";
          String ID=feedid;

          params.add(new BasicNameValuePair("UserID",UserID));
          params.add(new BasicNameValuePair("FeedId",ID));
          params.add(new BasicNameValuePair("like_status",Status));

          JSONObject json = jsonParser.makeHttpRequest(AppControllerClass.FeedLike,"POST", params);
          Log.d("Create Response", json.toString());

          try{
           if(json!=null)
           {
             String status=json.getString("status");
             if(status.equals("Success"))
             {
              flag=1;
             // Toast.makeText(context, "You Liked The Post", Toast.LENGTH_SHORT).show();
             }
             else
             {
             flag=2;
             //Toast.makeText(context, "Check The Connection", Toast.LENGTH_SHORT).show(); 
             }
           }
           else{
            flag=2;
           }

          }
          catch (JSONException e) {
           e.printStackTrace();
          }


          return null;
         }
         @Override
         protected void onPostExecute(Void args) 
         {
          mProgressDialog.dismiss();
          if(flag==1)
          {
           Toast.makeText(context, "You Liked The Post", Toast.LENGTH_SHORT).show();

          }
          else if (flag==2) 
          {
           Toast.makeText(context, "Check The Connection", Toast.LENGTH_SHORT).show(); 
          } 



         }

Answer 1

动态增加BaseAdapter中单击的文本计数

使用getTag/setTag执行此操作：

@Override
 public void onClick(View c) {
    int count=0; 
    if(v.getTag()==null)
        count=0;
    else{
      count=Integer.parseInt(v.getTag().toString());
    }
    count++;
    ((TextView)v).setText("Like"+count);
    v.setTag(count);
 }

Answer 2

试试这个..

@Override
    public Object getItem(int position) {
        return data.get(position);
    }

而不是

@Override
    public Object getItem(int position) {
        return null;
    }

Answer 3

这是我第一次回答有关StackOverflow的问题，我希望我的回答能够帮助您解决问题。

问题：

 holder.like.setText("Like"+"4");

 notifyDataSetChanged();

问题出在这里。您已手动将其设置为setText（“Like”+“4”）。在BaseAdapter的notifyDataSetChanged（）函数中，它引用了一个信息的适配器。

在您的情况下，它将是resulttp的参考。它引用了您传入的数据ArrayList。当您调用notifyDataSetChanged（）时，它将返回resulttp并显示在ArrayList中的WHAT。

解决方案：

1）删除此行

holder.like.setText("Like"+"4");

2）在BaseAdapter类中添加一个名为update（）的新函数

public void updateAdapter(ArrayList<HashMap<String, String>> newData)
{

     this.data.clear();
     this.data = data;
     notifyDataSetChanged();
}

3）在你喜欢的按钮/图像onClickListener上，调用函数updateAdapter（）并传入一个UPDATED ArrayList。

它应该没问题。祝你好运！

动态增加BaseAdapter中单击时的文本计数

3 个答案: