Question

我正在阅读Big Nerd Ranch Android编程手册。我正在处理CriminalIntent项目，我正在尝试设置一个DatePicker和TimePicker来设置犯罪的日期和时间。＆＃34;我的DatePicker对话框工作正常，当日期更改，一切正常更新，没有问题。

问题来自TimePicker。出于某种原因，onTimeChangedListener似乎没有触发，因此时间没有正确更新。我已经在我的代码中复制了将侦听器设置为TimePicker。我有一个日志声明，当我改变时间时永远不会触发，这就是为什么我认为这就是问题所在。

TimePicker timePicker = (TimePicker) v.findViewById(R.id.dialog_time_picker);
    timePicker.setCurrentHour(hour);
    timePicker.setCurrentMinute(minute);

    timePicker.setOnTimeChangedListener(new TimePicker.OnTimeChangedListener() {
        @Override
        public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {
            // Get the date
            date = new GregorianCalendar(year, month, day, hourOfDay, minute).getTime();
            Log.d("TimePickerFragment", "hour: " + hourOfDay + "; minute: " + minute);

            // Save this date
            getArguments().putSerializable(EXTRA_TIME, date);
        }
    });

以下是我设置小时和分钟的代码：

date = (Date) getArguments().getSerializable(EXTRA_TIME);

    // Create a calendar to get hour, minute, and AM/PM info
    cal = Calendar.getInstance();
    cal.setTime(date);
    int hour = cal.get(Calendar.HOUR_OF_DAY);
    int minute = cal.get(Calendar.MINUTE);
    int amPm = cal.get(Calendar.AM_PM); // 0 = AM 1 = PM
    year = cal.get(Calendar.YEAR);
    month = cal.get(Calendar.MONTH);
    day = cal.get(Calendar.DAY_OF_MONTH);

如果您需要任何其他代码，请告诉我

Answer 1

在Lollipop（5.0）之前，每当时间发生变化时，TimePicker视图都会触发onTimeChanged事件，允许应用程序动态响应选择器当前指定的时间。

在Lollipop中，Timepicker随附

机器人：timePickerMode =＆＃34;时钟＆＃34;

在时钟模式下，当时间改变时，onTimeChanged事件不会被触发。

所以最佳方式最好用 android：timePickerMode =＆＃34; spinner＆＃34;

<TimePicker
        android:id="@+id/timepick_start"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:timePickerMode="spinner"/>

Answer 2

使用TimePickerDialog和OnTimeSetListener;将您的代码放在侦听器的方法onTimeSet中。当用户选择时间时，将调用此方法。

Calendar mcurrentDate = Calendar.getInstance();
int mHour = mcurrentDate.get(Calendar.HOUR_OF_DAY);
int mMinute = mcurrentDate.get(Calendar.MINUTE);
TimePickerDialog mTimePicker = new TimePickerDialog(this, new TimePickerDialog.OnTimeSetListener() {
    @Override
    public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
        date = new GregorianCalendar(year, month, day, hourOfDay, minute).getTime();
        Log.d("TimePickerFragment", "hour: " + hourOfDay + "; minute: " + minute);
        getArguments().putSerializable(EXTRA_TIME, date);
    }
}, mHour, mMinute, true);
mTimePicker.setTitle("Select Time");
mTimePicker.show();

onTimeChangedListener未触发

2 个答案: