如何編輯以前的listView而不是添加新的？

Question

我有一個圖標button和一個listView在活動A.

圖標按鈕----->意圖B，返回值爲A，添加到新的列表

的ListView點擊 - >意圖B，返回更改值返回列表查看

我使用mClickedPosition=-1;來驗證圖標是否被點擊或listView，但它仍然添加到新列表中，即使listView被點擊。

活動A

 @Override 
     public boolean onOptionsItemSelected(MenuItem item) { 
      switch (item.getItemId()) { 
       case R.id.addDetails: 
        mClickedPosition=-1; // if icon is clicked 
        View menuItemView = findViewById(R.id.addDetails); 
        PopupMenu po = new PopupMenu(this, menuItemView); //for drop-down menu 
        po.getMenuInflater().inflate(R.menu.popup_details, po.getMenu()); 
        po.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() { 
        public boolean onMenuItemClick(MenuItem item) { 
        Toast.makeText(getApplication(), "You Clicked : " + item.getTitle(), Toast.LENGTH_SHORT).show(); 
        if ("Add Work Details".equals(item.getTitle())) 
        { 
         Intent intent = new Intent(getApplication(), B.class); // go to Activity B 
         startActivityForResult(intent, PROJECT_REQUEST_CODE); 
        } 
         return true; 
         } 
         }); 
        po.show(); //showing popup menu 
       } 
       return super.onOptionsItemSelected(item); 

      } 

    listview.setOnItemClickListener(new AdapterView.OnItemClickListener() { // if listView is clicked 
      @Override 
      public void onItemClick(AdapterView<?> a, View v, int position, long id) { 
       mClickedPosition=position; 
       Object o = listview.getItemAtPosition(position); 
       SearchResults fullObject = (SearchResults) o; 
       String temp = fullObject.getDescription(); 
       String Project=fullObject.getProject(); 
       String [] ReceiveProject=Project.split(":"); 
       String[] ReceiveDescription = temp.split(":"); 
       Intent i = new Intent(getApplication(), B.class); 
       i.putExtra("ReceiveProject", ReceiveProject[1].trim()); 
       i.putExtra("ReceiveDescription", ReceiveDescription[1]); 
       startActivityForResult(i,PROJECT_REQUEST_CODE); 
      } 
     }); 
    } 



    @Override 
    public void onActivityResult(int requestCode, int resultCode, Intent data) { // receive from Activity B and populate ListView A 
      ReceiveProject = data.getStringExtra("Project"); 
      ReceiveDescription = data.getStringExtra("Description"); 
      if(mClickedPosition==-1) { // if icon clicked 
       MyCustomBaseAdapter objMyCustomBaseAdapter = (MyCustomBaseAdapter) listview.getAdapter(); 
       objMyCustomBaseAdapter.addNewItem(ReceiveProject, ReceiveDescription, ReceiveProgress, ReceiveTimeIn, ReceiveTimeOut); // add list 
      } 
      else 
      { 
       // change the current list 
      } 

     } 

MyCustomBaseAdapter

public class MyCustomBaseAdapter extends BaseAdapter{ // for ListView in Activity A 


     private static ArrayList<SearchResults> searchArrayList; 

     private LayoutInflater mInflater; 

     public MyCustomBaseAdapter(Context context, ArrayList<SearchResults> results) { 
      searchArrayList = results; 
      mInflater = LayoutInflater.from(context); 
     } 

     public int getCount() { 
      return searchArrayList.size(); 
     } 



     public Object getItem(int position) { 
      return searchArrayList.get(position); 
     } 

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

     public void addNewItem(String P,String D,int Per,String I,String O) 
     { 
     SearchResults obj=new SearchResults(); 
     obj.setProject(" Project/Service/Training : "+P); 
     obj.setDescription(" Work Description : " + D); 
     searchArrayList.add(obj); 
     this. notifyDataSetChanged(); 
    } 



     public View getView(int position, View convertView, ViewGroup parent) { 
      ViewHolder holder; 
      if (convertView == null) { 
       convertView = mInflater.inflate(R.layout.custom_row_view, null); 
       holder = new ViewHolder(); 
       holder.txtProject= (TextView) convertView.findViewById(R.id.ListProject); 
       holder.txtDescription = (TextView) convertView.findViewById(R.id.ListDescription); 
       convertView.setTag(holder); 
      } else { 
       holder = (ViewHolder) convertView.getTag(); 
      } 

      holder.txtProject.setText(searchArrayList.get(position).getProject()); 
      holder.txtDescription.setText(searchArrayList.get(position).getDescription()); 
      return convertView; 
     } 

     static class ViewHolder { 
      TextView txtProject; 
      TextView txtDescription; 

     } 
    } 

Answer 1

1.get特殊藥水的對象，你點擊

SearchResults obj=searchArrayList.get(postion); 

2.no W設定值這樣的方式

obj.setProject(" Project/Service/Training : "+P); 
obj.setDescription(" Work Description : " + D); 

3.最後通知適配器。

this. notifyDataSetChanged();