0

我对此很陌生，所以请原谅我的天真。我已经在论坛中正确搜索了这个问题，但找不到解决方案，但可能是没有人像我一样粗心犯错误.. :)

我在两个对话框中调用的表单上有两个按钮。我有一个 Onprepare 方法和 On create 方法，用于通过开关和案例处理的对话框。

        public void onClick(View arg0) {
    // TODO what needs to be done on button clicks
    switch (arg0.getId()) {
    case R.id.bAddtrans:

    case R.id.btransdate:
        showDialog(1);
        date.setText(strDate);
    case R.id.bpaidfor:
        showDialog(2);
    }

我的 On Prepare 和 On Create 方法是：

@Override
protected void onPrepareDialog(int id, Dialog dialog) {
    super.onPrepareDialog(id, dialog);
    switch (id) {
    case 1:
        // Some initialization needed.
        DatePickerDialog dateDlg = (DatePickerDialog) dialog;
        int iDay,
        iMonth,
        iYear;
        Calendar cal = Calendar.getInstance();
        iDay = cal.get(Calendar.DAY_OF_MONTH);
        iMonth = cal.get(Calendar.MONTH);
        iYear = cal.get(Calendar.YEAR);
        dateDlg.updateDate(iYear, iMonth, iDay);
        break;
    case 2:
        // Static dialog hence no initialization needed
        break;
    }
    return;

}

protected Dialog onCreateDialog(int id) {
    switch (id) {
    case 1:
        DatePickerDialog dateDlg = new DatePickerDialog(this,
                new DatePickerDialog.OnDateSetListener() {
                    public void onDateSet(DatePicker view, int year,
                            int monthOfYear, int dayOfMonth) {
                        Time chosenDate = new Time();
                        chosenDate.set(dayOfMonth, monthOfYear, year);
                        long dtDob = chosenDate.toMillis(true);
                        strDate = DateFormat.format("MMMM dd, yyyy", dtDob);
                        // Toast.makeText(this, "Date picked: " + strDate,
                        // Toast.LENGTH_SHORT).show(); }
                    }
                }, 2011, 0, 1);
        dateDlg.setMessage("Please select date..");
        /*Toast toast = Toast.makeText(this, "Date picked: " + strDate,
                Toast.LENGTH_SHORT);
        toast.show();*/
        return dateDlg;
        //break;
    case 2:
        // TODO show multiselect dialog box
        // ArrayList<String> adapterpaidfor = new ArrayList<String>(Data);
        final CharSequence[] peoplelist = Data
                .toArray(new CharSequence[Data.size()]);
        final ArrayList<CharSequence> selectedpeople = new ArrayList<CharSequence>();
        boolean[] checkedpeople = new boolean[peoplelist.length];
        int count = peoplelist.length;

        for (int i = 0; i < count; i++)
            checkedpeople[i] = selectedpeople.contains(peoplelist[i]);

        DialogInterface.OnMultiChoiceClickListener peopleDialogListener = new DialogInterface.OnMultiChoiceClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which,
                    boolean isChecked) {
                if (isChecked)
                    selectedpeople.add(peoplelist[which]);
                else
                    selectedpeople.remove(peoplelist[which]);

                onChangeSelectedpeople();
            }

            private void onChangeSelectedpeople() {
                // TODO change the button name
                StringBuilder stringBuilder = new StringBuilder();

                for (CharSequence peoplelist : selectedpeople)
                    stringBuilder.append(peoplelist + ",");

                paidfor.setText(stringBuilder.toString());
            }
        };

        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("Select People");
        builder.setMultiChoiceItems(peoplelist, checkedpeople,
                peopleDialogListener);
        builder.setPositiveButton( "OK", onChangeSelectedpeople());

        AlertDialog dialog = builder.create();
        dialog.show();
        return dialog;
        //break;
    }
    return null;    

}

private android.content.DialogInterface.OnClickListener onChangeSelectedpeople() {
    // TODO Auto-generated method stub
    return null;
}

问题是，当我单击按钮 btransdate 时，案例 2 的对话框也会在前端弹出，我必须按对话框的 Ok 按钮，然后我可以在背景上找到具有日期选择器的第二个对话框。当我单击按钮 bpaid 时，一切正常，并且不会调用 datepicker 对话框。

4

2 回答 2

2

在您的第一个代码块中，您缺少 break 语句。您正在通过 switch 语句并随后在返回之前进行所有调用。

于 2012-08-22T23:00:00.490 回答
0

在你的 onClick 方法中你应该写一个 break；每种情况下的命令，如下所示：

public void onClick(View arg0) {
// TODO what needs to be done on button clicks
switch (arg0.getId()) {
case R.id.bAddtrans:
break;
case R.id.btransdate:
    showDialog(1);
    date.setText(strDate);
break;
case R.id.bpaidfor:
    showDialog(2);
break;
}
于 2012-08-22T23:02:27.370 回答