Question

enter image description here我的问题是我不想两次选择相同的选项.. 当它第一次被点击时应该被禁用。稍后当我们选择其他项目时，应启用禁用项目

public class DialogSelection extends DialogFragment实现了View.OnClickListener {

private static DialogSelection dialogSelection;
private MainActivity mainActivity;

public static DialogSelection newInstance(MainActivity mainActivity) {
    if (dialogSelection == null) {
        dialogSelection = new DialogSelection();
    }
    dialogSelection.mainActivity = mainActivity;
    return dialogSelection;
}

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {

    final String[] items = {"On Duty", "Off Duty", "Sleeper", "Driving"};

    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());

    builder.setTitle("Selection")
            .setItems(items, new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int item) {
                    Log.i("Dialogos", "Option Selected: " + items[item]);

                    switch (items[item]) {
                        case "On Duty":
                            mainActivity.updateTimelineStatus(DriverState.STATE_ONLINE);
                            break;
                        case "Off Duty":
                            mainActivity.updateTimelineStatus(DriverState.STATE_OFFLINE);
                            break;
                        case "Sleeper":
                            mainActivity.updateTimelineStatus(DriverState.STATE_SLEEPER);
                            break;
                        case "Driving":
                            mainActivity.updateTimelineStatus(DriverState.STATE_DRIVING);
                            break;
                        default:
                            break;
                    }
                }
            });

    return builder.create();
}

@Override
public void onClick(View v) {

}

}

Answer 1

你是否使用string []替换列表

List<String> list = new ArrayList<String>(Arrays.asList(str_array));
    list.add("onduty");
    ...
    add ur need options
    //check is string variable create inside ur class
    if(check!=null)
    {
    list.remove("check")
    }

Answer 2

刚写完，你可以尝试一下。

  private final String[] items = {"On Duty", "Off Duty", "Sleeper", "Driving"};//your data
    private ItemAdapter itemAdapter;//adapter
    private AdapterView.OnItemClickListener onItemClickListener = new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
            if (itemAdapter.getSelectPosition() == i) {
                return;
            }
            alertDialog.dismiss();
            itemAdapter.select(i);
            //your code
            Log.i("Dialogos", "Option Selected: " + items[i]);
            switch (items[i]) {
                case "On Duty":
                    break;
                case "Off Duty":
                    break;
                case "Sleeper":
                    break;
                case "Driving":
                    break;
                default:
                    break;
            }
        }
    }

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        if (itemAdapter == null) {
            itemAdapter = new ItemAdapter(getActivity(), items, -1);
        }
        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        builder.setTitle("Selection");
        final AlertDialog alertDialog = builder.create();
        ListView listView = new ListView(getActivity());
        alertDialog.setView(listView);//use custom ListView
        listView.setAdapter(itemAdapter);//user custom Adapter
        listView.setOnItemClickListener(onItemClickListener);
        return alertDialog;
    }

    /**
     * Custom Adapter
     */
    private class ItemAdapter extends BaseAdapter {
        private String[] data;
        private LayoutInflater layoutInflater;
        private int selectPosition = -1;//disabled item position

        public void select(int selectPosition) {
            this.selectPosition = selectPosition;
        }

        public int getSelectPosition() {
            return selectPosition;
        }

        public ItemAdapter(Context contexts, String[] data, int selectPosition) {
            layoutInflater = LayoutInflater.from(contexts);
            this.data = data;
            this.selectPosition = selectPosition;
        }

        @Override
        public int getCount() {
            return data.length;
        }

        @Override
        public Object getItem(int i) {
            return data[i];
        }

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

        @Override
        public View getView(int i, View view, ViewGroup viewGroup) {
            TextView textView = (TextView) layoutInflater.inflate(android.R.layout.simple_expandable_list_item_1, null);//use system default layout
            textView.setPadding(20, 20, 20, 20);
            textView.setText(data[i]);//set data
            textView.setEnabled(this.selectPosition != i);//disable or enable
            return textView;
        }
    }

如何在警报对话框中启用和禁用项目

2 个答案: