多个 TextWatcher 添加到 ExpandableListView 的组视图中的同一个 EditText

Question

我无法跟踪如何将 TextWatcher 多次添加到 ExpandableListView 中的 EditText。 ArrayList 只有 2 个元素。

输出应该只列出 0 和 1 一次，但它被调用了两次。

适配器：

public class ExpandableListAdapter extends BaseExpandableListAdapter {

     private LayoutInflater inflater;
     private Context context;
     private ExpandableListView accordion;
     private int lastExpandedGroupPosition; 
     ArrayList<ModelObject> mParent;    
     TextView textViewLabelGrandTotal;
     float grandTotal = 0;

     public ExpandableListAdapter( Context context, ArrayList<ModelObject> ModelObject, ExpandableListView accordion, TextView textViewLabelGrandTotal)
     {

         mParent = ModelObject;
         inflater = LayoutInflater.from(context);
         this.accordion = accordion;   
         this.context=context;   
         this.textViewLabelGrandTotal=textViewLabelGrandTotal;
     }

     @Override
     //counts the number of group/parent items so the list knows how many times calls getGroupView() method
    public int getGroupCount() {
        return mParent.size();
    }

     @Override
     //counts the number of children items so the list knows how many times calls getChildView() method
     public int getChildrenCount(int i) {
         return mParent.get(i).childCount;
     }

     @Override
     //gets the title of each parent/group
     public Object getGroup(int i) {
         return mParent.get(i).INVOICE_ID;
     }

     @Override
     //gets the name of each item
     public Object getChild(int i, int i1) {
            return mParent.get(i).children.get(i1);
     }

     @Override
     public long getGroupId(int i) {
            return i;
     }

     @Override
     public long getChildId(int i, int i1) {
            return i1;
     }

     @Override
     public boolean hasStableIds() {
            return true;
     }

     @Override
     //in this method you must set the text to see the parent/group on the list
     public View getGroupView(final int i, boolean b, View view, ViewGroup viewGroup) {
         if (view == null) {
                view = inflater.inflate(R.layout.sfa_receipt_by_customer_new_receipt_due_invoice_list_item_parent, viewGroup,false);
         } 
        // set category name as tag so view can be found view later
        view.setTag(getGroup(i).toString());

        CheckBox CheckBoxInv =(CheckBox)view.findViewById(R.id.CheckBoxInv);
        TextView textViewLabelInvoice = (TextView) view.findViewById(R.id.textViewLabelInvoice);
        TextView textViewLabelDate = (TextView) view.findViewById(R.id.textViewLabelDate);
        TextView textViewDueAmt = (TextView) view.findViewById(R.id.textViewDueAmt);
        TextView textViewRemainingAmt = (TextView) view.findViewById(R.id.textViewRemainingAmt);
        final EditText editTextPaid = (EditText)view.findViewById(R.id.editTextPaid);

        DecimalFormat df = new DecimalFormat("#.##");
        textViewLabelInvoice.setText(mParent.get(i).INVOICE_NO);
        textViewLabelDate.setText(mParent.get(i).INVOICE_DATE);
        textViewDueAmt.setText(df.format(mParent.get(i).DUE));
        textViewRemainingAmt.setText(df.format(mParent.get(i).REMAINING_AFTER_PAID));
        CheckBoxInv.setChecked(mParent.get(i).checked);

        CheckBoxInv.setOnClickListener(new View.OnClickListener() {         

            @Override
            public void onClick(View v) {

                CheckBox c = (CheckBox) v;

                System.out.println("===================== check change listerner ============================");
                editTextPaid.setText(df.format(mParent.get(i).DUE)); // editTextPaid.setText("");
                System.out.println("===================== check change listerner ============================");

                if(c.isChecked() == false)
                {
                    System.out.println("===================== uncheck change listerner ============================");
                    editTextPaid.setText("");
                    System.out.println("===================== uncheck change listerner ============================");
                }
//              notifyDataSetChanged();
            }
        });

        //enable focus of edit text box
        editTextPaid.setOnTouchListener(new View.OnTouchListener() {

            @Override
            public boolean onTouch(View v, MotionEvent event) {

                System.out.println("ON TOUCH LISTERNER");
                return false;
            }
        });

        //disable focus of edittext box
        editTextPaid.setOnFocusChangeListener(new View.OnFocusChangeListener() {          

            public void onFocusChange(View v, boolean hasFocus) {
                System.out.println("ON FOCUS CHANGE LISTENER");
            }
        });

        //re calculate the remaining balance amount
        editTextPaid.addTextChangedListener(new TextWatcher() {

            {
                System.out.println("TextWatcher Initialized..................!! " + i + " " + this);
            }


            @Override
            public void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {
                System.out.println("ON TEXT CHANGE");

            }

            @Override
            public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
                    int arg3) {
                System.out.println("BEFORE TEXT CHANGE");
            }

            @Override
            public void afterTextChanged(Editable arg0) {

                System.out.println("AFTER TEXT CHANGE");

            }
        });


        //return the entire view
        return view;                
     }


     @Override
     //in this method you must set the text to see the children on the list
     public View getChildView(int i,  int i1, boolean b, View view, ViewGroup viewGroup) {
          if (view == null) 
          {
                view = inflater.inflate(R.layout.sfa_receipt_by_customer_new_receipt_due_invoice_list_item_child, viewGroup,false);       
          }
          System.out.println("Inside getChildView()..................!!"); 
          TextView textViewLabelReceipt = (TextView) view.findViewById(R.id.textViewLabelReceipt);
          textViewLabelReceipt.setText((i1+1)+"."+mParent.get(i).children.get(i1).RECEIPT_NO);

          TextView textViewLabelDate = (TextView) view.findViewById(R.id.textViewLabelDate);
          textViewLabelDate.setText((i1+1)+"."+mParent.get(i).children.get(i1).RECEIPT_DATE);

          TextView textViewRemainingAmt = (TextView) view.findViewById(R.id.textViewRemainingAmt);
          textViewRemainingAmt.setText((i1+1)+"."+mParent.get(i).children.get(i1).REMAINING_AFTER_ADJUSTED_AMOUNT);

          TextView textViewDueAmt = (TextView) view.findViewById(R.id.textViewDueAmt);
          textViewDueAmt.setText((i1+1)+"."+mParent.get(i).children.get(i1).ADVANCE_BALANCE);

          EditText editTextPaid =(EditText)view.findViewById(R.id.editTextPaid);

          return view;
     }

     @Override
     public boolean isChildSelectable(int i, int i1) {
            return true;
     }

     @Override
     /**
     * automatically collapse last expanded group    
     */    
     public void onGroupExpanded(int groupPosition) {

            if(groupPosition != lastExpandedGroupPosition){
                accordion.collapseGroup(lastExpandedGroupPosition);
            }           
            super.onGroupExpanded(groupPosition);        
            lastExpandedGroupPosition = groupPosition;          
     }   

}

输出：

07-30 06:59:28.219: I/System.out(9082): TextWatcher Initialized..................!! 0 com.example.ExpandableListAdapter@52bf1224
07-30 06:59:28.223: I/System.out(9082): TextWatcher Initialized..................!! 1 com.example.ExpandableListAdapter@52c09858
07-30 06:59:28.227: I/System.out(9082): TextWatcher Initialized..................!! 0 com.example.ExpandableListAdapter@52c37d10
07-30 06:59:28.239: I/System.out(9082): TextWatcher Initialized..................!! 1 com.example.ExpandableListAdapter@52c723ec

Answer 1

自己解决了。

将 getGroupView() 方法的所有视图[CHECKBOX、EDITTEXT、TEXTVIEW] 放置在 ViewHolder class 中 [这只是一个包含视图的 class。
使用 "view" 对象的 settag() 方法保存它，如果 "view" 参数返回 null，它是 getGroupView() 方法的参数。
如果 "view" 参数不为空，则使用 getTag() 检索视图并从中初始化 ViewHolder 对象。

多个 TextWatcher 添加到 ExpandableListView 的组视图中的同一个 EditText

Multiple TextWatcher added to same EditText in ExpandableListView's group view

android

expandablelistview

expandablelistadapter

textwatcher

适配器：

输出：