Android 当我第二次尝试单击按钮打开Dialogfragment（警报对话框）时，它正在崩溃

当我试图再次单击按钮打开Dialogfragment时，Dialogfragment正在崩溃。此Dialogfragment以单选按钮显示现有邮件帐户。这是我的密码：

public String[] allemails() {
    _accountMgr = AccountManager.get(getActivity());
    Account[] accounts = _accountMgr.getAccounts();
    numberOfEmail = accounts.length;
    String[] emailAddress = new String[numberOfEmail];

    for (Account account : accounts) {
        accountsList = account.name.toString();
        emailAddress[r] = accountsList;
        r += 1;
    }
    MyAlertDialog f = new MyAlertDialog();
    Bundle args = new Bundle();
    args.putStringArray("Title", emailAddress);
    f.setArguments(args);

    return emailAddress;
}

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    // Use the Builder class for convenient dialog construction
    super.onCreate(savedInstanceState);
    setRetainInstance(true);

    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
    builder.setTitle(Html.fromHtml("<font color='#FFFF'>"
            + "Choose Account" + "</font>"));

    builder.setIcon(R.drawable.ic_udinic);
    builder.setCancelable(false).setSingleChoiceItems(allemails(), -1,
            new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                    AlertDialog alertDialog = (AlertDialog) dialog;
                    alertDialog.getButton(-1).setEnabled(true);

                }
            });
    builder.setCancelable(false).setPositiveButton("Set",
            new DialogInterface.OnClickListener() {

                public void onClick(DialogInterface dialog, int id) {

                    ((AlertDialog) dialog).getButton(id).setVisibility(
                            View.INVISIBLE);

                    ListView lw = ((AlertDialog) dialog).getListView();
                    CharSequence checkedItem = (CharSequence) lw
                            .getAdapter().getItem(
                                    lw.getCheckedItemPosition());

                    // Toast.makeText(getActivity(), checkedItem,
                    // Toast.LENGTH_LONG).show();

                    ((Main) getActivity()).doPositiveClick(checkedItem);
                    // dialog.dismiss();
                    // getDialog().dismiss();

                }
            });

    builder.setCancelable(false).setNegativeButton("Cancel",
            new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                    // User cancelled the dialog

                    // Toast.makeText(getActivity(),
                    // "You Press Cancel Button", Toast.LENGTH_LONG).show();

                    // dialog.dismiss();

                }

            });

    dialog = builder.create();
    return dialog;
}

@Override
public void onStart() {
    super.onStart();
    dialog.getButton(Dialog.BUTTON_POSITIVE).setEnabled(false);
}

@Override
public void onDestroyView() {
    // Removes the dismiss message to avoid shown dialogs being dismissed.
    if (getDialog() != null && getRetainInstance())
        getDialog().setDismissMessage(null);

    super.onDestroyView();
}

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我相信无法添加窗口标记null是您收到的错误。正如@Gopal所说的，可能的原因是你在打电话

super.onCreate(savedInstanceState);

或者有可能是您错误地泄露了对某个活动的引用

请参阅下面的链接以了解更多详细信息。

---

如果不是这种情况，请原谅。

在

之前，对于
循环，请将
r
的值重置为零

r = 0;
for (Account account : accounts) {
    accountsList = account.name.toString();
    emailAddress[r] = accountsList;
    r += 1;
}

以及调用super.onCreate（savedInstanceState）的原因在
onCreateDialog（）
？@GopalRao:如果我删除此代码..同样的事情发生在kalyan pvs的评论中…尝试发布根异常…@kalyan pvs我发布logcat
r = 0;
for (Account account : accounts) {
    accountsList = account.name.toString();
    emailAddress[r] = accountsList;
    r += 1;
}