Java 无法解析方法“newInstance”

我发现以下错误：

Cannot resolve method 'newInstance(com.example.ghazalitodo.AddReminderActivity, int, int, boolean)

这是我的代码：

public void setTime(View v) {
    if (mCurrentReminderUri == null) {
        Toast.makeText(this, "click again on the reminder list to set time alarm", Toast.LENGTH_LONG).show();
        return;
    }
    Calendar now = Calendar.getInstance();
    TimePickerDialog tpd = TimePickerDialog.newInstance(this, now.get(Calendar.HOUR_OF_DAY),
            now.get(Calendar.MINUTE), false);
    tpd.setThemeDark(false);
    tpd.show(getFragmentManager(), "Timepickerdialog");
}

// On clicking Date picker
public void setDate(View v) {
    if (mCurrentReminderUri == null) {
        Toast.makeText(this, "click again on the reminder list to set date alarm", Toast.LENGTH_LONG).show();
        return;
    }
    Calendar now = Calendar.getInstance();
    DatePickerDialog dpd = DatePickerDialog.new Instance(this, now.get(Calendar.YEAR),
            now.get(Calendar.MONTH),
            now.get(Calendar.DAY_OF_MONTH)
    );
    dpd.show(getFragmentManager(), "Datepickerdialog");
}

---

如果我错了，请原谅我。我不熟悉那些观点。但是，我认为您应该使用：

TimePickerDialog tpd = new TimePickerDialog(this, null, 
        now.get(Calendar.HOUR_OF_DAY), now.get(Calendar.MINUTE), false);

及

让我知道这是否有帮助。否则，我将删除我的答案

编辑

我猜您是从某个扩展了DialogFragment的库中复制了代码。这就是为什么你会有一些冲突

为了使用这些对话框的默认实现使代码正常工作，您可以使用：

public void setTime(View v) {
    if (mCurrentReminderUri == null) {
        Toast.makeText(this, "click again on the reminder list to set time alarm", Toast.LENGTH_LONG).show();
        return;
    }
    Calendar now = Calendar.getInstance();
    TimePickerDialog tpd = new TimePickerDialog(this, null,
            now.get(Calendar.HOUR_OF_DAY), now.get(Calendar.MINUTE), false);
    tpd.show();
}

// On clicking Date picker
public void setDate(View v) {
    if (mCurrentReminderUri == null) {
        Toast.makeText(this, "click again on the reminder list to set date alarm", Toast.LENGTH_LONG).show();
        return;
    }
    Calendar now = Calendar.getInstance();
    DatePickerDialog dpd = new DatePickerDialog (this, null, now.get(Calendar.YEAR),
            now.get(Calendar.MONTH), now.get(Calendar.DAY_OF_MONTH));
    dpd.show();
}

---

当我添加ur更改时，出现了一个新错误，无法解析：tpd.setmedermarkfalse中的符号“tpd”；tpd.showgetFragmentManager，Timepickerdialog；和：无法应用显示在对话框中：dpd.showgetFragmentManager，Datepickerdial，无法解析方法“SetMedMarkBoolean”

public void setTime(View v) {
    if (mCurrentReminderUri == null) {
        Toast.makeText(this, "click again on the reminder list to set time alarm", Toast.LENGTH_LONG).show();
        return;
    }
    Calendar now = Calendar.getInstance();
    TimePickerDialog tpd = new TimePickerDialog(this, null,
            now.get(Calendar.HOUR_OF_DAY), now.get(Calendar.MINUTE), false);
    tpd.show();
}

// On clicking Date picker
public void setDate(View v) {
    if (mCurrentReminderUri == null) {
        Toast.makeText(this, "click again on the reminder list to set date alarm", Toast.LENGTH_LONG).show();
        return;
    }
    Calendar now = Calendar.getInstance();
    DatePickerDialog dpd = new DatePickerDialog (this, null, now.get(Calendar.YEAR),
            now.get(Calendar.MONTH), now.get(Calendar.DAY_OF_MONTH));
    dpd.show();
}