Question

我有一个已启用多项选择的列表，我需要获取所选的行并将其传递给上一个活动。 getCheckedItemPositions（）返回“可检查”（true或false）行的数量，而不是所选行的行数。在我看来，该方法的名称具有误导性。我将迭代getCheckedItemPositions（）以获取真实的并将所选行的数量传递给上一个活动。我想知道它可能比我的解决方案更好吗？

以下是以前的代码 -

final SparseBooleanArray checkedItems = mListView.getCheckedItemPositions();

    Team team;

    final int checkedItemsCount = checkedItems.size();
    int[] ids = new int [checkedItemsCount];
    for (int i = 0; i < checkedItemsCount; ++i) {
      team = new Team();   
      team = mListAdapter.getItem(checkedItems.keyAt(i));
      list.add(team);
      ids[i] = team.getTeamId();
    }

    Intent i = new Intent();
    i.putExtra(INTENT_TEAM_SELECTION_SIZE, list.size());
    i.putExtra(INTENT_TEAM_IDS, ids);
    setResult(RESULT_OK, i);
    finish();

我的更新代码 -

final SparseBooleanArray checkedItems = mListView.getCheckedItemPositions();
    Team team;

    final int checkableItemsCount = checkedItems.size();
    int selectedItemsCount = 0;

    //get the count of selected rows
    for (int i = 0; i < checkableItemsCount; ++i) {
        if (checkedItems.valueAt(i)) {
            selectedItemsCount++;
        }
    }

    //Initialize the array of ids by the number of selected rows
    int[] ids = new int[selectedItemsCount];
    int index = 0;
    for (int i = 0; i < checkableItemsCount; ++i) {
        if (checkedItems.valueAt(i)) {
            team = new Team();
            team = mListAdapter.getItem(checkedItems.keyAt(i));
            ids[index] = team.getTeamId();
            index++;
        }
    }

    Intent i = new Intent();
    i.putExtra(INTENT_TEAM_SELECTION_SIZE, selectedItemsCount);
    i.putExtra(INTENT_TEAM_IDS, ids);
    setResult(RESULT_OK, i);
    finish();

Answer 1

这个解决方案看起来有点清洁，也许检查一下？：）

https://stackoverflow.com/a/8726923/1337802

getCheckedItemPositions具有误导性，大小不正确

1 个答案: