如何获得从检查列表视图android的项目？ [英] How to get checked items from android listview?

问题描述

我有一个使用listview.Each排由ImageView的，一个TextView和一个CheckBox的Andr​​oid应用程序。
我想获得选定从这个listview.I使用过的物品。

I have an android application which uses listview.Each row consist of ImageView,a TextView and a CheckBox. I want to get selected items from this listview.I used

private void getSelectedItems() {
        List<String>list = new ArrayList<String>();
        try {
            SparseBooleanArray checkedItems = new SparseBooleanArray();
            checkedItems = listView.getCheckedItemPositions();
            if (checkedItems == null) {
                return;
            }
            final int checkedItemsCount = checkedItems.size();
            for (int i = 0; i < checkedItemsCount; ++i) {
                int position = checkedItems.keyAt(i);
                boolean bool = checkedItems.valueAt(position);
                if (bool) {
                   list.add(mainList.get(position));
                }
            }

        } catch (Exception e) {

        }
    }

但我想设置一些项目，如针对检查在启动理想管材检查项目只能获得时，如果用户选择/取消的item.No检查，即使是在检查项目设置项目获得条件启动programmatically.What是这里的问题？

But i want to set some items as checked with respect to a condition at start up.The checked item obtain only when if the user check/Uncheck an item.No checked item obtain even if the item is set as checked at the start up programmatically.What is the problem here?

由于提前

推荐答案

做这样的事情，

ArrayList<Integer> checkedPositions = new ArrayList<Integer>();
myListView.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> arg0, View view,
                    int position, long arg3) {
                CheckBox cb = (CheckBox) view.findViewById(R.id.yourCheckBox);
                Toast.makeText(getApplicationContext(), "Row " + position + " is checked", Toast.LENGTH_SHORT).show();
                if (cb.isChecked()) {
                    checkedPositions.add(position); // add position of the row
                                                    // when checkbox is checked
                } else {
                    checkedPositions.remove(position); // remove the position when the
                                            // checkbox is unchecked
                    Toast.makeText(getApplicationContext(), "Row " + position + " is unchecked", Toast.LENGTH_SHORT).show();
                }
            }
        });

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