Question

我正在尝试在（Sherlock）ArrayAdapter的{{1}}方法中为ListView设置onCreateDialog()。我刚刚得到DialogFragment，但我认为布局和字符串数组的路径是正确的，因为当我直接为NullPointerException设置适配器时，会显示List。

AlertDialog.Builder

有什么建议吗？

编辑：

事实证明，行条目XML似乎不正确，因为我用

测试了下面提到的代码

public class InputMyDialogFragment 
    extends SherlockDialogFragment 
    implements OnClickListener {

    private ListView listView;
    private ArrayAdapter<String> adapter;
    private String[] myItemArray;

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        myItemArray = getResources().getStringArray(R.array.my_item_array);
        listView = (ListView) getActivity().findViewById(R.id.dialog_listView);
        adapter = new ArrayAdapter<String>(getActivity(), R.id.row_relativeLayout, myItemArray);
        listView.setAdapter(adapter);

        return new AlertDialog.Builder(getActivity())
            .setView(getActivity().getLayoutInflater().inflate(R.layout.dialog, null))
            //.setAdapter(adapter, this)
            .setPositiveButton("OK", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    // TODO
                }
            })
            .setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    dialog.dismiss();
                }
            }).create();
    }

    @Override
    public void onClick(DialogInterface dialog, int which) {
        // TODO Auto-generated method stub
    }
}

并且有效。

这是自定义行条目的XML，我在教程中找到了（找不到链接了）：

adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_single_choice, myItemArray);

我不知道会出现什么问题......

Answer 1

你试图在给布局充气之前找到你的列表。

在方法的开头试试这个：

View v = getActivity().getLayoutInflater().inflate(R.layout.dialog, null);
//if you only have one listview in your layout, v is your listview
// ListView lv = (ListView)v;
ListView lv = v.findById(R.id.dialog_listView);

然后，在返回语句中给予v代替或夸大布局。

return new AlertDialog.Builder(getActivity())
        .setView(v)...

Answer 2

你应该在onCreateView方法

中使用你自己的dialogFragment布局

例如：

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle    savedInstanceState)
{
    // Inflate the layout to use as dialog or embedded fragment     
    View v = inflater.inflate(R.layout.layout_frogos_password, container, false);

    Button buttonOk = (Button) v.findViewById(R.id.buttonForgotPasswordDialogOk);


    buttonOk.setOnClickListener(new OnClickListener()
    {

        @Override
        public void onClick(View v)
        {
            mListener.onDialogPositiveClick(ForgotPasswordDialog.this);             
        }
    });

    return v;
}

/** The system calls this only when creating the layout in a dialog. */
@Override
public Dialog onCreateDialog(Bundle savedInstanceState)
{
    // The only reason you might override this method when using
    // onCreateView() is
    // to modify any dialog characteristics. For example, the dialog
    // includes a
    // title by default, but your custom layout might not need it. So here
    // you can
    // remove the dialog title, but you must call the superclass to get the
    // Dialog.
    Dialog dialog = super.onCreateDialog(savedInstanceState);
    dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
    //dialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
    return dialog;
}

setAdapter（）在（Sherlock）DialogFragment中导致NullPointerException

2 个答案: