如何在onPrepareDialog中设置setSingleChoiceItems的内容？

Question

伙计们,在onCreateDialog上我有这个:

case DIALOG_REVIEW: {
    if (bundle.containsKey("POSITION")) {
    final int position = bundle.getInt("POSITION");
    ArrayList<String> alterNumbers = numbers.get(position);
    final String[] phoneNums = new String[alterNumbers.size()];
    for (int i = 0; i < alterNumbers.size(); i++) {
        phoneNums[i] = alterNumbers.get(i);
    }
    AlertDialog.Builder dialog = new AlertDialog.Builder(this);
    dialog.setTitle(names.get(position) + "'s number(s)");
    dialog.setSingleChoiceItems(phoneNums, 0,
        new DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog,
                int which) {
            // get selected item and close the dialog
            String selectedNumber = phoneNums[which];
            updateUserSelectedNumber(position , selectedNumber);
            }
        });
    return dialog.create();
    }

这是有效的.

但要注意线

dialog.setSingleChoiceItems(phoneNums, 0,
        new DialogInterface.OnClickListener() {

假设每次弹出对话框时都会更改phoneNums.我已经覆盖onPrepareDialog方法,但我不知道如何为它分配新值.并且那里没有setSingleChoiceItems.

这是我的onPrepareDialog方法

case DIALOG_REVIEW: {
    final int position = bundle.getInt("POSITION");
    ArrayList<String> alterNumbers = numbers.get(position);
    final String[] phoneNums = new String[alterNumbers.size()];
    for (int i = 0; i < alterNumbers.size(); i++) {
    phoneNums[i] = alterNumbers.get(i);
    }
    AlertDialog alertDialog = (AlertDialog) dialog;
    alertDialog.setTitle(names.get(position) + "'s number(s)");
    ???
    break;
}

解决办法是什么？先谢谢你们.

Answer 1

您需要使用AlertDialog类中的getListView方法.然后对返回的对象使用setItemChecked方法.例:

alertDialog.getListView().setItemChecked(1, true);

Answer 2

我刚遇到同样的问题:

两种解决方案

1 /快而脏

每次完成后删除对话框=> onPrepareDialog将不会被调用,因此您不会遇到数据更新问题:

protected Dialog onCreateDialog(int id) {
    ...
    case DIALOG_REVIEW: {
        AlertDialog.Builder dialog = new AlertDialog.Builder(this);
        dialog.setTitle(names.get(position) + "'s number(s)");
        dialog.setSingleChoiceItems(phoneNums, 0,new DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog,int which) {
            // get selected item and close the dialog
            String selectedNumber = phoneNums[which];
            updateUserSelectedNumber(position , selectedNumber);
            removeDialog(DIALOG_REVIEW);
        }
    });
    return dialog.create();
}

如果您愿意,可以放置一个onDismissListener并在对话框中执行removeDialog.

2 /相当漂亮的一个

在onPrepareDialog方法中,只需用一个全新的对象替换对话框使用的旧ArrayAdapter:

@Override
protected void onPrepareDialog(int id, Dialog dialog) {
    switch (id) {
        case DIALOG_REVIEW:
            ArrayAdapter<CharSequence> adapter = new ArrayAdapter<CharSequence>(this, android.R.layout.select_dialog_singlechoice, android.R.id.text1, phoneNums);
            AlertDialog ad = (AlertDialog) dialog;
            ad.getListView().setAdapter(adapter);
        break;
        default:
            super.onPrepareDialog(id, dialog);
    }
}

我使用的方法与android使用的方法(froyo源代码的AlertController.java L. 854)相同,第一次填充对话框.