我有一个android应用程序,它使用listview,每一行由imageview、textview和一个复选框组成。
我想从这个列表视图中获取选定的项目。我使用

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) {

        }
    }

但我想在启动时将某些项设置为与条件相关的已检查项。仅当用户选中/取消选中某个项时,才获取选中项。即使在启动时以编程方式将该项设置为已检查,也不会获取选中项。这里有什么问题?
提前谢谢

最佳答案

做这样的事,

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();
                }
            }
        });

10-07 19:08
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