Question

我的ListView项包含TextView和LinearLayout。 LinearLayout包含动态生成的CheckBoxes，每个列表项中的复选框数可以不同。我想在屏幕上滚动项目时保存复选框的状态，然后将其向后滚动以进行对焦。现在它没有被保存。这是我的代码，你能告诉我我做错了吗？

public class ListAdapter extends ArrayAdapter<BaseModel> {

  private ArrayList<CheckboxModel> mCheckboxModels;

  private static class ViewHolder {

    TextView mName;
    LinearLayout mLinearLayout;

  }

  public ListAdapter(Context context, ArrayList<BaseModel> baseModels) {
    super(context, 0, baseModels);
  }

  @NonNull
  @Override
  public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
    final BaseModel currentBaseModel = getItem(position);

    mCheckboxModels = new ArrayList<>();

    View currentRow = convertView;
    ViewHolder viewHolder;

    if (currentRow == null) {
      viewHolder = new ViewHolder();
      LayoutInflater inflater = LayoutInflater.from(getContext());
      currentRow = inflater.inflate(R.layout.list_item, parent, false);
      viewHolder.mName = (TextView) currentRow.findViewById(R.id.idTextView);
      viewHolder.mLinearLayout = (LinearLayout) currentRow.findViewById(R.id.idCheckboxLinearLayout);
      currentRow.setTag(viewHolder);
    } else {
      viewHolder = (ViewHolder) currentRow.getTag();
    }

    if (currentBaseModel != null) {
      viewHolder.mName.setText(currentBaseModel.getName());
      viewHolder.mLinearLayout.removeAllViewsInLayout();

      int numOfButtons = currentBaseModel.getNumOfButtons();

      for (int i = 0; i < numOfButtons; i++) {
        mCheckboxModels.add(new CheckboxModel(new CheckBox(getContext()), false));

        currentBaseModel.setCheckboxModels(mCheckboxModels);
        viewHolder.mLinearLayout.addView(currentBaseModel.getCheckboxModels().get(i).getCheckBox());

        final int j = i;

        currentBaseModel.getCheckboxModels().get(i).getCheckBox().setOnCheckedChangeListener(
            new OnCheckedChangeListener() {
              @Override
              public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                currentBaseModel.getCheckboxModels().get(j).setChecked(isChecked);
              }
            });

        currentBaseModel.getCheckboxModels().get(i).getCheckBox()
            .setChecked(currentBaseModel.getCheckboxModels().get(i).isChecked());
      }

    }

    return currentRow;
  }
}

Answer 1

不要做mCheckboxModels = new ArrayList＆lt;＆gt;（）;在getView（）

中

你必须这样做：

private ArrayList mCheckboxModels = new ArrayList＆lt;＆gt;（）

在ListView中保存动态生成的复选框状态

1 个答案: