Android 设置多选项目

Question

当我单击一个按钮时，会弹出一个对话框，其中包含多个 selection 复选框。当我 select 并单击“确定”时，它会弹出另一个带有 selected item.If 的对话框=] 和 select 并单击确定，它会附加上一个 selection 的结果。我不想附加结果。我不理解或犯错了什么？代码在这里

@Override
    public View onCreateView(final LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        final View view = inflater.inflate(R.layout.fragment_tab2, container, false);
        Button button = (Button) view.findViewById(R.id.displayBox);
        final List<String> selectedItems = new ArrayList<String>();
        final String[] itemList = {"Item1", "Item2", "Item3", "Item1", "Item2", "Item3", "Item1", "Item2", "Item3", "Item1", "Item2", "Item3"};
        final AlertDialog.Builder builder = new AlertDialog.Builder(view.getContext());
        builder.setTitle("Multi Select");
        builder.setMultiChoiceItems(itemList, null, new DialogInterface.OnMultiChoiceClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which, boolean isChecked) {
                if (isChecked) {
                    selectedItems.add(itemList[which].toString());
                }
            }
        }).setPositiveButton("Ok", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                ListView listView = new ListView(view.getContext());
                listView.setAdapter(new ArrayAdapter<String>(view.getContext(), android.R.layout.simple_list_item_1, selectedItems));
                Dialog dialog1 = new Dialog(view.getContext());
                dialog1.setTitle("Selected Informations");
                dialog1.setContentView(listView);
                dialog1.show();
            }
        });
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                builder.show();
            }
        });
        return view;
    }

Answer 1

试试这个，

ListView listView = new ListView(view.getContext());
                listView.setAdapter(new ArrayAdapter<String>(view.getContext(), android.R.layout.simple_list_item_1, selectedItems));

//清空列表视图

selectedItems.clear();

            Dialog dialog1 = new Dialog(view.getContext());
            dialog1.setTitle("Selected Informations");
            dialog1.setContentView(listView);
            dialog1.show();

Android 设置多选项目

Android setMultiChoiceItems

android

multichoiceitems