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日期时间选择器控件注释

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pull/3/head
weichunyi 3 months ago
parent 0f2b44f276
commit abbb4f4b66
1 changed files with 140 additions and 85 deletions
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225
src/Notes-master/src/net/micode/notes/ui/DateTimePicker.java
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@ -21,92 +21,124 @@ import java.util.Calendar;
import net.micode.notes.R;
import android.content.Context;
import android.text.format.DateFormat;
import android.view.View;
import android.widget.FrameLayout;
import android.widget.NumberPicker;
/**
* 日期时间选择器控件，用于选择日期和时间
* 支持12小时制和24小时制显示模式
*/
public class DateTimePicker extends FrameLayout {
// 默认启用状态
private static final boolean DEFAULT_ENABLE_STATE = true;
private static final int HOURS_IN_HALF_DAY = 12;
private static final int HOURS_IN_ALL_DAY = 24;
private static final int DAYS_IN_ALL_WEEK = 7;
// 时间相关常量
private static final int HOURS_IN_HALF_DAY = 12; // 半天的小时数
private static final int HOURS_IN_ALL_DAY = 24; // 全天的小时数
private static final int DAYS_IN_ALL_WEEK = 7; // 一周的天数
// 日期选择器范围
private static final int DATE_SPINNER_MIN_VAL = 0;
private static final int DATE_SPINNER_MAX_VAL = DAYS_IN_ALL_WEEK - 1;
// 24小时制时间选择器范围
private static final int HOUR_SPINNER_MIN_VAL_24_HOUR_VIEW = 0;
private static final int HOUR_SPINNER_MAX_VAL_24_HOUR_VIEW = 23;
// 12小时制时间选择器范围
private static final int HOUR_SPINNER_MIN_VAL_12_HOUR_VIEW = 1;
private static final int HOUR_SPINNER_MAX_VAL_12_HOUR_VIEW = 12;
// 分钟选择器范围
private static final int MINUT_SPINNER_MIN_VAL = 0;
private static final int MINUT_SPINNER_MAX_VAL = 59;
// AM/PM选择器范围
private static final int AMPM_SPINNER_MIN_VAL = 0;
private static final int AMPM_SPINNER_MAX_VAL = 1;
private final NumberPicker mDateSpinner;
private final NumberPicker mHourSpinner;
private final NumberPicker mMinuteSpinner;
private final NumberPicker mAmPmSpinner;
private Calendar mDate;
private String[] mDateDisplayValues = new String[DAYS_IN_ALL_WEEK];
private boolean mIsAm;
private boolean mIs24HourView;
private boolean mIsEnabled = DEFAULT_ENABLE_STATE;
private boolean mInitialising;
private OnDateTimeChangedListener mOnDateTimeChangedListener;
// 控件成员变量
private final NumberPicker mDateSpinner; // 日期选择器
private final NumberPicker mHourSpinner; // 小时选择器
private final NumberPicker mMinuteSpinner; // 分钟选择器
private final NumberPicker mAmPmSpinner; // AM/PM选择器
private Calendar mDate; // 当前选择的日期时间
private String[] mDateDisplayValues = new String[DAYS_IN_ALL_WEEK]; // 日期显示值数组
private boolean mIsAm; // 是否为上午
private boolean mIs24HourView; // 是否为24小时制
private boolean mIsEnabled = DEFAULT_ENABLE_STATE; // 控件是否可用
private boolean mInitialising; // 是否正在初始化
private OnDateTimeChangedListener mOnDateTimeChangedListener; // 日期时间变化监听器
// 日期变化监听器
private NumberPicker.OnValueChangeListener mOnDateChangedListener = new NumberPicker.OnValueChangeListener() {
@Override
public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
// 计算日期变化量并更新日期
mDate.add(Calendar.DAY_OF_YEAR, newVal - oldVal);
updateDateControl();
onDateTimeChanged();
}
};
// 小时变化监听器
private NumberPicker.OnValueChangeListener mOnHourChangedListener = new NumberPicker.OnValueChangeListener() {
@Override
public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
boolean isDateChanged = false;
Calendar cal = Calendar.getInstance();
// 处理12小时制下的特殊时间点变化
if (!mIs24HourView) {
// 处理PM到AM的日期变化
if (!mIsAm && oldVal == HOURS_IN_HALF_DAY - 1 && newVal == HOURS_IN_HALF_DAY) {
cal.setTimeInMillis(mDate.getTimeInMillis());
cal.add(Calendar.DAY_OF_YEAR, 1);
isDateChanged = true;
} else if (mIsAm && oldVal == HOURS_IN_HALF_DAY && newVal == HOURS_IN_HALF_DAY - 1) {
}
// 处理AM到PM的日期变化
else if (mIsAm && oldVal == HOURS_IN_HALF_DAY && newVal == HOURS_IN_HALF_DAY - 1) {
cal.setTimeInMillis(mDate.getTimeInMillis());
cal.add(Calendar.DAY_OF_YEAR, -1);
isDateChanged = true;
}
// 处理AM/PM切换
if (oldVal == HOURS_IN_HALF_DAY - 1 && newVal == HOURS_IN_HALF_DAY ||
oldVal == HOURS_IN_HALF_DAY && newVal == HOURS_IN_HALF_DAY - 1) {
mIsAm = !mIsAm;
updateAmPmControl();
}
} else {
}
// 处理24小时制下的特殊时间点变化
else {
// 处理23点到0点的日期变化
if (oldVal == HOURS_IN_ALL_DAY - 1 && newVal == 0) {
cal.setTimeInMillis(mDate.getTimeInMillis());
cal.add(Calendar.DAY_OF_YEAR, 1);
isDateChanged = true;
} else if (oldVal == 0 && newVal == HOURS_IN_ALL_DAY - 1) {
}
// 处理0点到23点的日期变化
else if (oldVal == 0 && newVal == HOURS_IN_ALL_DAY - 1) {
cal.setTimeInMillis(mDate.getTimeInMillis());
cal.add(Calendar.DAY_OF_YEAR, -1);
isDateChanged = true;
}
}
// 更新当前小时并触发变化事件
int newHour = mHourSpinner.getValue() % HOURS_IN_HALF_DAY + (mIsAm ? 0 : HOURS_IN_HALF_DAY);
mDate.set(Calendar.HOUR_OF_DAY, newHour);
onDateTimeChanged();
// 如果需要更新日期
if (isDateChanged) {
setCurrentYear(cal.get(Calendar.YEAR));
setCurrentMonth(cal.get(Calendar.MONTH));
@ -115,21 +147,28 @@ public class DateTimePicker extends FrameLayout {
}
};
// 分钟变化监听器
private NumberPicker.OnValueChangeListener mOnMinuteChangedListener = new NumberPicker.OnValueChangeListener() {
@Override
public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
int minValue = mMinuteSpinner.getMinValue();
int maxValue = mMinuteSpinner.getMaxValue();
int offset = 0;
// 处理分钟循环滚动
if (oldVal == maxValue && newVal == minValue) {
offset += 1;
offset += 1; // 从最大值滚动到最小值，小时加1
} else if (oldVal == minValue && newVal == maxValue) {
offset -= 1;
offset -= 1; // 从最小值滚动到最大值，小时减1
}
// 如果需要调整小时
if (offset != 0) {
mDate.add(Calendar.HOUR_OF_DAY, offset);
mHourSpinner.setValue(getCurrentHour());
updateDateControl();
// 更新AM/PM显示
int newHour = getCurrentHourOfDay();
if (newHour >= HOURS_IN_HALF_DAY) {
mIsAm = false;
@ -139,14 +178,18 @@ public class DateTimePicker extends FrameLayout {
updateAmPmControl();
}
}
// 设置新分钟并触发变化事件
mDate.set(Calendar.MINUTE, newVal);
onDateTimeChanged();
}
};
// AM/PM变化监听器
private NumberPicker.OnValueChangeListener mOnAmPmChangedListener = new NumberPicker.OnValueChangeListener() {
@Override
public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
// 切换AM/PM状态并调整时间
mIsAm = !mIsAm;
if (mIsAm) {
mDate.add(Calendar.HOUR_OF_DAY, -HOURS_IN_HALF_DAY);
@ -158,39 +201,58 @@ public class DateTimePicker extends FrameLayout {
}
};
/**
* 日期时间变化监听接口
*/
public interface OnDateTimeChangedListener {
void onDateTimeChanged(DateTimePicker view, int year, int month,
int dayOfMonth, int hourOfDay, int minute);
}
/**
* 构造函数，使用当前时间初始化
*/
public DateTimePicker(Context context) {
this(context, System.currentTimeMillis());
}
/**
* 构造函数，使用指定时间戳初始化
*/
public DateTimePicker(Context context, long date) {
this(context, date, DateFormat.is24HourFormat(context));
}
/**
* 主构造函数，完成所有初始化工作
*/
public DateTimePicker(Context context, long date, boolean is24HourView) {
super(context);
mDate = Calendar.getInstance();
mInitialising = true;
mIsAm = getCurrentHourOfDay() >= HOURS_IN_HALF_DAY;
mIsAm = getCurrentHourOfDay() < HOURS_IN_HALF_DAY; // 根据当前时间设置AM/PM
// 加载布局
inflate(context, R.layout.datetime_picker, this);
// 初始化日期选择器
mDateSpinner = (NumberPicker) findViewById(R.id.date);
mDateSpinner.setMinValue(DATE_SPINNER_MIN_VAL);
mDateSpinner.setMaxValue(DATE_SPINNER_MAX_VAL);
mDateSpinner.setOnValueChangedListener(mOnDateChangedListener);
// 初始化小时选择器
mHourSpinner = (NumberPicker) findViewById(R.id.hour);
mHourSpinner.setOnValueChangedListener(mOnHourChangedListener);
mMinuteSpinner = (NumberPicker) findViewById(R.id.minute);
// 初始化分钟选择器
mMinuteSpinner = (NumberPicker) findViewById(R.id.minute);
mMinuteSpinner.setMinValue(MINUT_SPINNER_MIN_VAL);
mMinuteSpinner.setMaxValue(MINUT_SPINNER_MAX_VAL);
mMinuteSpinner.setOnLongPressUpdateInterval(100);
mMinuteSpinner.setOnLongPressUpdateInterval(100); // 设置长按更新间隔
mMinuteSpinner.setOnValueChangedListener(mOnMinuteChangedListener);
// 初始化AM/PM选择器
String[] stringsForAmPm = new DateFormatSymbols().getAmPmStrings();
mAmPmSpinner = (NumberPicker) findViewById(R.id.amPm);
mAmPmSpinner.setMinValue(AMPM_SPINNER_MIN_VAL);
@ -198,19 +260,21 @@ public class DateTimePicker extends FrameLayout {
mAmPmSpinner.setDisplayedValues(stringsForAmPm);
mAmPmSpinner.setOnValueChangedListener(mOnAmPmChangedListener);
// update controls to initial state
// 更新控件初始状态
updateDateControl();
updateHourControl();
updateAmPmControl();
// 设置时间显示模式
set24HourView(is24HourView);
// set to current time
// 设置为当前时间
setCurrentDate(date);
// 设置启用状态
setEnabled(isEnabled());
// set the content descriptions
// 初始化完成
mInitialising = false;
}
@ -220,6 +284,7 @@ public class DateTimePicker extends FrameLayout {
return;
}
super.setEnabled(enabled);
// 设置各子控件的启用状态
mDateSpinner.setEnabled(enabled);
mMinuteSpinner.setEnabled(enabled);
mHourSpinner.setEnabled(enabled);
@ -233,18 +298,14 @@ public class DateTimePicker extends FrameLayout {
}
/**
* Get the current date in millis
*
* @return the current date in millis
* 获取当前日期的时间戳
*/
public long getCurrentDateInTimeMillis() {
return mDate.getTimeInMillis();
}
/**
* Set the current date
*
* @param date The current date in millis
* 设置当前日期（通过时间戳）
*/
public void setCurrentDate(long date) {
Calendar cal = Calendar.getInstance();
@ -254,13 +315,7 @@ public class DateTimePicker extends FrameLayout {
}
/**
* Set the current date
*
* @param year The current year
* @param month The current month
* @param dayOfMonth The current dayOfMonth
* @param hourOfDay The current hourOfDay
* @param minute The current minute
* 设置当前日期（通过年月日时分）
*/
public void setCurrentDate(int year, int month,
int dayOfMonth, int hourOfDay, int minute) {
@ -272,18 +327,14 @@ public class DateTimePicker extends FrameLayout {
}
/**
* Get current year
*
* @return The current year
* 获取当前年份
*/
public int getCurrentYear() {
return mDate.get(Calendar.YEAR);
}
/**
* Set current year
*
* @param year The current year
* 设置当前年份
*/
public void setCurrentYear(int year) {
if (!mInitialising && year == getCurrentYear()) {
@ -295,18 +346,14 @@ public class DateTimePicker extends FrameLayout {
}
/**
* Get current month in the year
*
* @return The current month in the year
* 获取当前月份
*/
public int getCurrentMonth() {
return mDate.get(Calendar.MONTH);
}
/**
* Set current month in the year
*
* @param month The month in the year
* 设置当前月份
*/
public void setCurrentMonth(int month) {
if (!mInitialising && month == getCurrentMonth()) {
@ -318,18 +365,14 @@ public class DateTimePicker extends FrameLayout {
}
/**
* Get current day of the month
*
* @return The day of the month
* 获取当前日期
*/
public int getCurrentDay() {
return mDate.get(Calendar.DAY_OF_MONTH);
}
/**
* Set current day of the month
*
* @param dayOfMonth The day of the month
* 设置当前日期
*/
public void setCurrentDay(int dayOfMonth) {
if (!mInitialising && dayOfMonth == getCurrentDay()) {
@ -341,36 +384,38 @@ public class DateTimePicker extends FrameLayout {
}
/**
* Get current hour in 24 hour mode, in the range (0~23)
* @return The current hour in 24 hour mode
* 获取当前小时（24小时制）
*/
public int getCurrentHourOfDay() {
return mDate.get(Calendar.HOUR_OF_DAY);
}
/**
* 获取当前小时（根据显示模式）
*/
private int getCurrentHour() {
if (mIs24HourView){
return getCurrentHourOfDay();
} else {
int hour = getCurrentHourOfDay();
if (hour > HOURS_IN_HALF_DAY) {
return hour - HOURS_IN_HALF_DAY;
return hour - HOURS_IN_HALF_DAY; // PM时间转换为12小时制
} else {
return hour == 0 ? HOURS_IN_HALF_DAY : hour;
return hour == 0 ? HOURS_IN_HALF_DAY : hour; // 0点转换为12点
}
}
}
/**
* Set current hour in 24 hour mode, in the range (0~23)
*
* @param hourOfDay
* 设置当前小时（24小时制）
*/
public void setCurrentHour(int hourOfDay) {
if (!mInitialising && hourOfDay == getCurrentHourOfDay()) {
return;
}
mDate.set(Calendar.HOUR_OF_DAY, hourOfDay);
// 处理12小时制下的显示
if (!mIs24HourView) {
if (hourOfDay >= HOURS_IN_HALF_DAY) {
mIsAm = false;
@ -390,16 +435,14 @@ public class DateTimePicker extends FrameLayout {
}
/**
* Get currentMinute
*
* @return The Current Minute
* 获取当前分钟
*/
public int getCurrentMinute() {
return mDate.get(Calendar.MINUTE);
}
/**
* Set current minute
* 设置当前分钟
*/
public void setCurrentMinute(int minute) {
if (!mInitialising && minute == getCurrentMinute()) {
@ -411,16 +454,14 @@ public class DateTimePicker extends FrameLayout {
}
/**
* @return true if this is in 24 hour view else false.
* 是否为24小时制显示
*/
public boolean is24HourView () {
public boolean is24HourView() {
return mIs24HourView;
}
/**
* Set whether in 24 hour or AM/PM mode.
*
* @param is24HourView True for 24 hour mode. False for AM/PM mode.
* 设置时间显示模式（24小时制或12小时制）
*/
public void set24HourView(boolean is24HourView) {
if (mIs24HourView == is24HourView) {
@ -434,20 +475,29 @@ public class DateTimePicker extends FrameLayout {
updateAmPmControl();
}
/**
* 更新日期控件显示
*/
private void updateDateControl() {
Calendar cal = Calendar.getInstance();
cal.setTimeInMillis(mDate.getTimeInMillis());
cal.add(Calendar.DAY_OF_YEAR, -DAYS_IN_ALL_WEEK / 2 - 1);
mDateSpinner.setDisplayedValues(null);
// 生成一周的日期显示文本
for (int i = 0; i < DAYS_IN_ALL_WEEK; ++i) {
cal.add(Calendar.DAY_OF_YEAR, 1);
mDateDisplayValues[i] = (String) DateFormat.format("MM.dd EEEE", cal);
}
mDateSpinner.setDisplayedValues(mDateDisplayValues);
mDateSpinner.setValue(DAYS_IN_ALL_WEEK / 2);
mDateSpinner.setValue(DAYS_IN_ALL_WEEK / 2); // 设置中间位置为当前日期
mDateSpinner.invalidate();
}
/**
* 更新AM/PM控件显示
*/
private void updateAmPmControl() {
if (mIs24HourView) {
mAmPmSpinner.setVisibility(View.GONE);
@ -458,6 +508,9 @@ public class DateTimePicker extends FrameLayout {
}
}
/**
* 更新小时控件显示范围
*/
private void updateHourControl() {
if (mIs24HourView) {
mHourSpinner.setMinValue(HOUR_SPINNER_MIN_VAL_24_HOUR_VIEW);
@ -469,17 +522,19 @@ public class DateTimePicker extends FrameLayout {
}
/**
* Set the callback that indicates the 'Set' button has been pressed.
* @param callback the callback, if null will do nothing
* 设置日期时间变化监听器
*/
public void setOnDateTimeChangedListener(OnDateTimeChangedListener callback) {
mOnDateTimeChangedListener = callback;
}
/**
* 触发日期时间变化事件
*/
private void onDateTimeChanged() {
if (mOnDateTimeChangedListener != null) {
mOnDateTimeChangedListener.onDateTimeChanged(this, getCurrentYear(),
getCurrentMonth(), getCurrentDay(), getCurrentHourOfDay(), getCurrentMinute());
}
}
}
}
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