如何處理classadd列表中的過濾列表單擊列表程序？

Question

每一個！我是一個新的android在android ...在我的應用程序中，點擊片段上的按鈕後，我切換到新的活動，它顯示列表，然後我過濾列表，現在我想獲得選定的過濾列表項的細節回到調用片段。 ..我試圖爲監聽器的onClick在適配器類的getView方法，其延伸基本適配器，但它不會切換到調用fragment..it保持在那裏只有

My Adapter classs 

public class user_list_Adapter extends BaseAdapter { 
    private Context context; 
    public static ArrayList<user_list_item> user_arraylist; 
    private ArrayList<user_list_item> arraylist; 
    public static String selected_code; 

    public user_list_Adapter(Context context, ArrayList<user_list_item> user_array) { 
     this.context = context; 
     this.user_arraylist = user_array; 
     this.arraylist = new ArrayList<user_list_item>(); 
     this.arraylist.addAll(user_array); 

    } 

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

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

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

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

     if (convertView == null) { 
      LayoutInflater mInflater = (LayoutInflater) 
        context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE); 
      convertView = mInflater.inflate(R.layout.user_row, null); 
     } 

     TextView txtname = (TextView) convertView.findViewById(R.id.dname); 
     TextView txtcode = (TextView) convertView.findViewById(R.id.dcode); 

     txtname.setText(user_arraylist.get(position).getCust_name()); 
     txtcode.setText(user_arraylist.get(position).getCode()); 

     // Listen for ListView Item Click 
     convertView.setOnClickListener(new View.OnClickListener() { 

      @Override 
      public void onClick(View arg0) { 
       Deposite df = new Deposite(); 
      MainActivity activity = (MainActivity) context; //this line gives class cast exception 
      FragmentTransaction transaction = activity.getSupportFragmentManager().beginTransaction(); 
      Bundle b = new Bundle(); 
      b.putString("search_name ", search_name); 
      b.putString("search_code ", search_code); 
      df.setArguments(b); 
      transaction.replace(R.id.content_frame, df); 
      transaction.addToBackStack(null); 
      transaction.commit(); 
        } 
     }); 

     return convertView; 
    } 


    // Filter Class 
    public void filter(String charText) { 
     charText = charText.toLowerCase(Locale.getDefault()); 
     user_arraylist.clear(); 
     if (charText.length() == 0) { 
      user_arraylist.addAll(arraylist); 
     } 
     else 
     { 
      for (user_list_item item : arraylist) 
      { 
       if (item.getCust_name().toLowerCase(Locale.getDefault()).contains(charText)) 
       { 
        user_arraylist.add(item); 
       } 

       if (item.getCode().toLowerCase(Locale.getDefault()).contains(charText)) 
       { 
        user_arraylist.add(item); 
       } 
      } 
     } 
     notifyDataSetChanged(); 
    } 

} 

Answer 1

我Adpater類與內部類濾波器

public class user_list_Adapter extends ArrayAdapter<user_list_item> implements Filterable 
{ 

    private Filter mfilter; 
    private Context context; 
    private ArrayList<user_list_item> filter_user_list; 
    private ArrayList<user_list_item> alluserlist; 
    //public static String selected_code; 

    public user_list_Adapter(Context context, ArrayList<user_list_item> user_array) { 
     super(context,R.layout.user_row,user_array); 
     this.context = context; 
     this.filter_user_list = user_array; 
     this.alluserlist = new ArrayList<user_list_item>(); 
     this.alluserlist.addAll(user_array); 

    } 

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

    @Override 
    public user_list_item getItem(int position) { 

     return filter_user_list.get(position); 
    } 

    @Override 
    public long getItemId(int position) { 

     return filter_user_list.get(position).hashCode(); 
    } 

    public void resetData() { 
     filter_user_list = alluserlist; 
    } 


    /* ********************************* 
    * We use the holder pattern 
    * It makes the view faster and avoid finding the component 
    * **********************************/ 

    private static class UserHolder { 
     public TextView txtname; 
     public TextView txtcode; 
    } 

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

     UserHolder uholder=new UserHolder(); 

     // First let's verify the convertView is not null 
     if (convertView == null) { 
      // This a new view we inflate the new layout 
      LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
      convertView = inflater.inflate(R.layout.user_row, null); 
      // Now we can fill the layout with the right values 
      TextView tvname = (TextView) convertView.findViewById(R.id.dname); 
      TextView tvcode = (TextView) convertView.findViewById(R.id.dcode); 


      uholder.txtname = tvname; 
      uholder.txtcode = tvcode; 

      convertView.setTag(uholder); 
     } 
     else 
      uholder = (UserHolder) convertView.getTag(); 

     user_list_item p = filter_user_list.get(position); 
     uholder.txtname.setText(p.getCust_name()); 
     uholder.txtcode.setText(p.getCode()); 

     return convertView; 
    } 

     /* 
    * We create our filter 
    */ 

    @Override 
    public Filter getFilter() { 
     if (mfilter == null) 
      mfilter = new userFilter(); 

     return mfilter; 
    } 

    private class userFilter extends Filter { 

     @Override 
     protected FilterResults performFiltering(CharSequence charText) { 
      FilterResults results = new FilterResults(); 
      // We implement here the filter logic 
      if (charText == null || charText.length() == 0) { 
       // No filter implemented we return all the list 
       results.values = alluserlist; 
       results.count = alluserlist.size(); 
      } 
      else { 
       // We perform filtering operation 
       List<user_list_item> uList = new ArrayList<user_list_item>(); 

       for (user_list_item p : filter_user_list) { 
        if (p.getCust_name().toLowerCase(Locale.getDefault()).contains(charText)) { 
        uList.add(p); 
       } 

        if (p.getCode().toLowerCase(Locale.getDefault()).contains(charText)) { 
        uList.add(p); 
       } 
       } 

       results.values = uList; 
       results.count = uList.size(); 

      } 
      return results; 
     } 

     @Override 
     protected void publishResults(CharSequence constraint, 
             FilterResults results) { 

      // Now we have to inform the adapter about the new list filtered 
      if (results.count == 0) 
       notifyDataSetInvalidated(); 
      else { 

       filter_user_list = (ArrayList<user_list_item>) results.values; 
       notifyDataSetChanged(); 
      } 

     } 

    } 

    } 

在我的search_window活動類ie.List類中調用適配器類 將onItemclick偵聽器設置爲

// Binds the Adapter to the ListView 

list.setAdapter(adapter); 

     list.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
      @Override 
      public void onItemClick(AdapterView<?> parent, View view, int position, long l) { 

       // We know that each row in the adapter is a Map 
       user_list_item row = adapter.getItem(position); 
       //Toast.makeText(getApplicationContext(),"You Clicked On.."+row.getCust_name(),Toast.LENGTH_LONG).show(); 
       MainActivity.deposite_search_flag = true;  //global static variable 
       MainActivity.search_name = row.getCust_name(); //global 
       MainActivity.search_code =row.getCode();  //global 
       for (int i=0;i<RecordList.size();i++){ //user_list_item only contains name n code 
        if (row.getCode()==Code_Array[i]){ 
         MainActivity.search_available = avail_bal_Array[i]; 
        } 
       } 
       finish(); //switch to caller fragment and executes OnResume method of fragment 
      } 
     }); 

通過設置MainActivity類別全局變量我切換通過直接結束此活動呼叫者片段（光潔度（）;）

//In caller fragment class 
@Override 
    public void onResume() { 
     super.onResume(); 
     if (MainActivity.deposite_search_flag){ 
      txtname.setText(MainActivity.search_name); 
      txtcode.setText(MainActivity.search_code); 
      txt_available_bal.setText(MainActivity.search_available); 
     } 
    }