Question

我有一个AlerDialog，其中显示项目列表 checkboxes。我正在尝试获取所选tag (Checkbox.getTag())的{{1}}和将它们附加到checkboxes。然后我想从我声明String的类中获取此String。

有没有办法做到这一点，或者我应该改变实施的逻辑？

这是我的AlerDialog：

CustomAdapter

以下是我将该列表设置为public class DepartmentsAdapter extends BaseAdapter { private Context mContext; private List<DepartmentModel> departmentsList; private LayoutInflater inflater; public DepartmentsAdapter(Context mContext, List<DepartmentModel> departmentsList){ this.mContext = mContext; this.departmentsList = departmentsList; } @Override public int getCount() { return departmentsList.size(); } @Override public Object getItem(int position) { return departmentsList.get(position); } @Override public long getItemId(int position) { return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { if (inflater == null) inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE); if (convertView == null) convertView = inflater.inflate(R.layout.departments_list_item, null); DepartmentModel deptModel = (DepartmentModel) getItem(position); CheckBox deptChBox = (CheckBox) convertView.findViewById(R.id.deptCheckBox); TextView deptName = (TextView) convertView.findViewById(R.id.deptNameTextView); deptChBox.setTag(deptModel.departmentCode); deptName.setText(deptModel.departmentName); /*deptChBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { buttonView.getTag(); } });*/ return convertView; } }以及我要从中选择AlertDialog的位置的代码段：

checkboxes

Answer 1

Thnx的帮助，但我设法解决它。这是我的解决方案：

    public class DepartmentsAdapter extends BaseAdapter implements CompoundButton.OnCheckedChangeListener{

    private Context mContext;
    private List<DepartmentModel> departmentsList;
    private HashMap<String, Boolean> hashMap;
    private LayoutInflater inflater;

    //Constructor
    public DepartmentsAdapter(Context mContext, List<DepartmentModel> departmentsList, List<String> checkedItems){
        this.mContext = mContext;
        this.departmentsList = departmentsList;
        hashMap = new HashMap<>();

        if(checkedItems != null) {
            for (String item : checkedItems) {
                hashMap.put(item, true);
            }
        }
    }

    @Override
    public int getCount() {
        return departmentsList.size();
    }

    @Override
    public Object getItem(int position) {
        return departmentsList.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        if (inflater == null)
            inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        if (convertView == null)
            convertView = inflater.inflate(R.layout.departments_list_item, null);

        DepartmentModel deptModel = (DepartmentModel) getItem(position);

        CheckBox deptChBox = (CheckBox) convertView.findViewById(R.id.deptCheckBox);
        TextView deptName = (TextView) convertView.findViewById(R.id.deptNameTextView);

        deptChBox.setTag(deptModel.departmentCode);
        deptName.setText(deptModel.departmentName);

        if(hashMap.get(deptModel.departmentCode) != null && hashMap.get(deptModel.departmentCode)){
            deptChBox.setChecked(true);
        }

        deptChBox.setOnCheckedChangeListener(this);

        return convertView;
    }

    @Override
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
        String deptCode = (String) buttonView.getTag();
        hashMap.put(deptCode, isChecked);
    }

    public List<String> getCheckedItems() {
        ArrayList<String> checkedItems = new ArrayList<>();
        for(String deptCode : hashMap.keySet()){
            if(hashMap.get(deptCode)){
                checkedItems.add(deptCode);
            }
        }
        return checkedItems;
    }
}

并在AlerDialog上将其称为：

 final List<String> checkedItems = departmentsAdapter.getCheckedItems();
 deptCodeString = Arrays.toString(checkedItems.toArray()).replace(", ", ",").replace("[", "").replace("]", "");

Answer 2

您可以在适配器类

中尝试这样的操作

 private CheckBox mSelectedRB;
 private int selected = -1;
 private String title = "";

然后在你的getView方法中

    title = this.items.get(position);
   // deptName.setText(title);
    deptChBox.setTag(title);
        deptChBox.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view)
        {
            if(position != selected && mSelectedRB != null){
                mSelectedRB.setChecked(false);
            }

            selected = position;
            mSelectedRB = (CheckBox)view;
            selectedUrl = (String)view.getTag();
            //notifyDataSetInvalidated();
        }
    });

  if(selected != position){
        deptChBox.setChecked(false);
    }else{
        deptChBox.setChecked(true);
        if(deptChBox != null && deptChBox != mSelectedRB){
            mSelectedRB = deptChBox;
        }
    }

现在您可以在对话框类中调用它，没有任何问题。希望它有所帮助...

Answer 3

选中此http://www.ulduzsoft.com/2012/07/android-dialog-to-choose-a-directory-or-file-based-on-alertdialog/可能有用......

从AlertDialog上绑定的自定义适配器获取多个复选框的tar

3 个答案: