Question

In my Apps, I used ListView to select a Items to be Ordered. When I select the Items to Order it get checked and it is added in the Ordering page. If I go back to Main page and If again I come to the Item List ,The selected Items will be unchecked but selected Items are present in the Ordering page. Selected Items should be checked until manually removed. Please help me to solve this.

这是我的代码:

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


      final  ViewHolder holder;

        if (convertView == null) 
        {
            convertView = inflater.inflate(R.layout.selecteditemlistview, null);
            holder = new ViewHolder();

            holder.textViewSelectedText = (TextView)convertView.findViewById(R.id.selectedtext);
            holder.price=(TextView)convertView.findViewById(R.id.selectitemprice);
            holder.image=(ImageView)convertView.findViewById(R.id.selectitemimage);
            holder.qty=(EditText)convertView.findViewById(R.id.selectqty);
            holder.total=(TextView)convertView.findViewById(R.id.price);               
            holder.delete = (Button) convertView.findViewById(R.id.delete);

            holder.uncheck = (CheckBox)convertView.findViewById(R.id.bcheck);

            convertView.setTag(holder);
        }
        else 
        {
            holder = (ViewHolder) convertView.getTag();
        }
        String amount=holder.qty.getText().toString();
        final Double price1=Double.parseDouble(itemprice.get(position));
        int qut=Integer.parseInt(holder.qty.getText().toString());
        Double total=(price1*qut);
        holder.textViewSelectedText.setText(arr1.get(position));
        holder.price.setText(itemprice.get(position));
        holder.image.setImageBitmap(itemimage.get(position));
        holder.total.setText(String.valueOf(total));


        holder.delete.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                 arr1.remove(position);
                 itemimage.remove(position);
                 itemprice.remove(position);
               //  holder.uncheck.setChecked(false);
                 View parent = (View)v.getParent(); 
                 CheckBox chkBox = (CheckBox)parent.findViewById(R.id.bcheck); 
                 if ((holder.arr1==true)&&(holder.uncheck.isChecked()))
                     {holder.uncheck.setChecked(false);
                     }
                 notifyDataSetChanged();


            }

        });



      holder.qty.setOnFocusChangeListener(new OnFocusChangeListener() {

        public void onFocusChange(View v, boolean hasFocus) {
            // TODO Auto-generated method stub
            if(!hasFocus)
            {

                 int position = v.getId();      
                final EditText Caption = (EditText) v;
                Caption.setFocusable(true); 
                holder.qty.setFocusable(true);
                int q=Integer.parseInt(holder.qty.getText().toString());
                Double result=(price1 * q);
                System.out.println(result);              
                holder.total.setText(String.valueOf(result));
                                }
        }
    });


        return convertView;     
    }

    class ViewHolder      
    {
         protected boolean arr1;
        public CheckBox uncheck;
        public Button delete;
         public TextView mTextView;

        TextView textViewSelectedText = null;
        TextView price=null;
        ImageView image=null;      
        EditText qty=null;
        TextView total=null;
    }

Answer 1

我知道的解决方案是手动操作。您需要将选中的项目列表传递到 ListView 上。

<强>您的主要活动

Intent intent = new Intent(this, YourListViewActivity.class);
// parcelables or a List of indexes (your choice but I prefer Parcelables)
// I assume that you have your selection stored in a List to work with it
// make SomeKey as a constant
intent.putParcelableArrayListExtra("SomeKey", listOfYourObjectsAsParcelables);
startActivityForResult(intent, requestCode);

<强度 > 选择活动 -- -- 假设其延展

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // load selection from the intent
    List<YourParcelableObject> parcelables = getIntent().getParcelableArrayListExtra("SomeKey");

    if (parcelables != null) {
        // convert to YourObject
        List<YourObject> selectedObjects = convert(parcelables);

        // iterate over the list and check items        
        for (int i = 0; i < getListView().getAdapter().getCount(); i++) {
            YourObject object = (YourObject) getListView().getAdapter().getItem(i);
            if (selectedObjects.contains(object)) {
                getListView().setItemChecked(i, true);
            }
        }
    } 
}

请注意,这只是一个片段,我没有测试它,但它应该给你一个想法。

友情链接