Question

我有自定义复选框的alertdialog，我需要将选定的选项传递给主机活动，并保留所选的选项。这是我的代码：

    public class TimelineSettings extends DialogFragment {
    ArrayList<Integer> selected_categories = new ArrayList<Integer>();
    boolean[] itemsChecked = {false, false, false, false, false, false};
    private FlatCheckBox fourniture,nourriture,voyages,habillement,medias,autres;


    public interface dialoglistener {
        public void onOkay(ArrayList<Integer> selected);
        public void onCancel();
    }
    dialoglistener mlistener;

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        // ensure that the host activity implements the callback interface
        try {
            // Instantiate the dialogListener so we can send events to the host
            mlistener = (dialoglistener) activity;
        } catch (ClassCastException e) {
            // if activity doesn't implement the interface, throw an exception
            throw new ClassCastException(activity.toString()
                    + " must implement dialogListener");
        }
    }
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {

        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        LayoutInflater inflater = LayoutInflater.from(getActivity());
        View custom = inflater.inflate(R.layout.custom_settings,null);
        fourniture = (FlatCheckBox)custom.findViewById(R.id.fourniture);
        nourriture = (FlatCheckBox)custom.findViewById(R.id.nourriture);
        voyages = (FlatCheckBox)custom.findViewById(R.id.voyages);
        habillement = (FlatCheckBox)custom.findViewById(R.id.habillement);
        medias = (FlatCheckBox)custom.findViewById(R.id.medias);
        autres = (FlatCheckBox)custom.findViewById(R.id.autres);

        if (selected_categories.contains(0)){
            fourniture.setChecked(true);
        }
        if (selected_categories.contains(1)){
            nourriture.setChecked(true);
        }
        if (selected_categories.contains(2)){
            voyages.setChecked(true);
        }
        if (selected_categories.contains(3)){
            habillement.setChecked(true);
        }
        if (selected_categories.contains(4)){
            medias.setChecked(true);
        }
        if (selected_categories.contains(5)){
            autres.setChecked(true);
        }
               builder.setView(custom)
                    .setPositiveButton("OK", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int id) {
                       checkboxState();
                        mlistener.onOkay(selected_categories);
                    }
                })
                .setNegativeButton("Annuler", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int id) {
                        mlistener.onCancel();
                    }
                });
        return builder.create();
    }
    public void checkboxState(){
        if (fourniture.isChecked()){
            if(!selected_categories.contains(0)){
                selected_categories.add(0);
                itemsChecked[0]=true;
            }
            else if (selected_categories.contains(0)) {
                // Else, if the item is already in the array, remove it
                selected_categories.remove(0);
                itemsChecked[0]=false;
            }

        }
        if (nourriture.isChecked()){
            if(!selected_categories.contains(1)){
                selected_categories.add(1);
                itemsChecked[1]=true;
            }
            else if (selected_categories.contains(1)) {
                selected_categories.remove(1);
                itemsChecked[1]=false;
            }

        }

        if (voyages.isChecked()){
            if(!selected_categories.contains(2)){
                selected_categories.add(2);
                itemsChecked[2]=true;
            }
            else if (selected_categories.contains(2)) {
                selected_categories.remove(2);
                itemsChecked[2]=false;
            }

        }
        if (habillement.isChecked()){
            if(!selected_categories.contains(3)){
                selected_categories.add(3);
                itemsChecked[3]=true;
            }
            else if (selected_categories.contains(3)) {
                selected_categories.remove(3);
                itemsChecked[3]=false;
            }

        }

        if (medias.isChecked()){
            if(!selected_categories.contains(4)){
                selected_categories.add(4);
                itemsChecked[4]=true;
            }
            else if (selected_categories.contains(4)) {
                selected_categories.remove(4);
                itemsChecked[4]=false;
            }

        }

        if (autres.isChecked()){
            if(!selected_categories.contains(5)){
                selected_categories.add(5);
                itemsChecked[5]=true;
            }
            else if (selected_categories.contains(5)) {
                selected_categories.remove(5);
                itemsChecked[5]=false;
            }

        }
    }
}

这段代码工作正常，但看起来并不是这样！如果没有太多...... 我的问题是，是否有办法在我的复选框上使用循环来获取其状态，然后将数组itemschecked的元素设置为true / false以表示持久性。谢谢！

Answer 1

保留FlatCheckBoxs数组：

private FlatCheckBox [] check = new FlatCheckBox[6];

并使用枚举来检索您需要的复选框：

private enum Names
{
    fourniture(0),
    nourriture(1),
    voyages(2),
    habillement(3),
    medias(4),
    autres(5);

    private int val;

    Names(int a)
    {
        val = a;
    }

    public int get()
    {
        return val;
    }
};

现在使用：

    public void checkboxState()
    {
        for(FlatCheckBox fb : check)
        {
            if (fb.isChecked())
            {

            }
        }
    }

您可以像这样访问数组的各个元素：

FlatCheckBox fourniture = check[Names.fourniture.get()];

我会使用枚举来获得更好的可读性，使用[0]，[1] ...可能会造成混淆并导致编程错误。

使用复选框的动态方式

1 个答案: