/* * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net) * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package net.micode.notes.ui; import java.text.DateFormatSymbols; 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; /* Author:刘瑞轩 Data:2023/4/12 */ public class DateTimePicker extends FrameLayout { 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; private static final int DATE_SPINNER_MIN_VAL = 0; private static final int DATE_SPINNER_MAX_VAL = DAYS_IN_ALL_WEEK - 1; private static final int HOUR_SPINNER_MIN_VAL_24_HOUR_VIEW = 0; private static final int HOUR_SPINNER_MAX_VAL_24_HOUR_VIEW = 23; private static final int HOUR_SPINNER_MIN_VAL_12_HOUR_VIEW = 1; private static final int HOUR_SPINNER_MAX_VAL_12_HOUR_VIEW = 12; private static final int MINUT_SPINNER_MIN_VAL = 0; private static final int MINUT_SPINNER_MAX_VAL = 59; 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; private NumberPicker.OnValueChangeListener mOnDateChangedListener = new NumberPicker.OnValueChangeListener() { @Override public void onValueChange(NumberPicker picker, int oldVal, int newVal) {//更改日期 mDate.add(Calendar.DAY_OF_YEAR, newVal - oldVal); updateDateControl(); onDateTimeChanged(); } };//当用户更改值之后改变便签的修改日期 private NumberPicker.OnValueChangeListener mOnHourChangedListener = new NumberPicker.OnValueChangeListener() { @Override public void onValueChange(NumberPicker picker, int oldVal, int newVal) {//各自的参数代表被改变值得NumberPicker对象，旧值，新值 boolean isDateChanged = false;//用户是否改变值 Calendar cal = Calendar.getInstance();//获取当前的时间 if (!mIs24HourView) {//不是用的24小时制度 if (!mIsAm && oldVal == HOURS_IN_HALF_DAY - 1 && newVal == HOURS_IN_HALF_DAY) {//是下午旧值是11，新值是12，代表到了下一天 cal.setTimeInMillis(mDate.getTimeInMillis());//将修改时间修改为当前的时间 cal.add(Calendar.DAY_OF_YEAR, 1);//过了一天，将日期加1 isDateChanged = true; } else if (mIsAm && oldVal == HOURS_IN_HALF_DAY && newVal == HOURS_IN_HALF_DAY - 1) {//如果当前是上午，并且 //旧值是12，新值是11，那么就代表回到了上一天 cal.setTimeInMillis(mDate.getTimeInMillis());//获取当前的时间 cal.add(Calendar.DAY_OF_YEAR, -1);//日期减一 isDateChanged = true; } if (oldVal == HOURS_IN_HALF_DAY - 1 && newVal == HOURS_IN_HALF_DAY || oldVal == HOURS_IN_HALF_DAY && newVal == HOURS_IN_HALF_DAY - 1) {//只要之前是11，现在是12，或者是之前是12，现在是11，AM和PM都会发生改变，取反 mIsAm = !mIsAm; updateAmPmControl();//更新限制 } } else { if (oldVal == HOURS_IN_ALL_DAY - 1 && newVal == 0) {//如果当前时间比之前时间早，代表已经过了一天了 cal.setTimeInMillis(mDate.getTimeInMillis()); cal.add(Calendar.DAY_OF_YEAR, 1); isDateChanged = true; } else if (oldVal == 0 && newVal == HOURS_IN_ALL_DAY - 1) {//如果当前时间比之前时间晚代表是同一天 cal.setTimeInMillis(mDate.getTimeInMillis()); cal.add(Calendar.DAY_OF_YEAR, -1); isDateChanged = true; } } int newHour = mHourSpinner.getValue() % HOURS_IN_HALF_DAY + (mIsAm ? 0 : HOURS_IN_HALF_DAY); mDate.set(Calendar.HOUR_OF_DAY, newHour); onDateTimeChanged(); if (isDateChanged) { setCurrentYear(cal.get(Calendar.YEAR)); setCurrentMonth(cal.get(Calendar.MONTH)); setCurrentDay(cal.get(Calendar.DAY_OF_MONTH)); } } }; private NumberPicker.OnValueChangeListener mOnMinuteChangedListener = new NumberPicker.OnValueChangeListener() { @Override public void onValueChange(NumberPicker picker, int oldVal, int newVal) {//通过调整分钟来调整时间 int minValue = mMinuteSpinner.getMinValue();//获取最小值 int maxValue = mMinuteSpinner.getMaxValue();//获取最大值 int offset = 0;//判断是否跨越边界 if (oldVal == maxValue && newVal == minValue) {//如果新的是最小的，旧的值是最大的那么小时加1 offset += 1; } else if (oldVal == minValue && newVal == maxValue) {//如果新的是最大的值，旧的是最小值，那么代表我们是往上调整的，那么小时减小 offset -= 1; } if (offset != 0) {//如果跨越边界了 mDate.add(Calendar.HOUR_OF_DAY, offset);//日期进行相应的改变 mHourSpinner.setValue(getCurrentHour());//获取当前的时间 updateDateControl();//更新限制 int newHour = getCurrentHourOfDay();//更新小时 if (newHour >= HOURS_IN_HALF_DAY) {//判断是上午还是下午 mIsAm = false;//不是上午 updateAmPmControl();//更新限制 } else { mIsAm = true;//是上午 updateAmPmControl(); } } mDate.set(Calendar.MINUTE, newVal);//设置成新的值 onDateTimeChanged();//更改小时 } }; private NumberPicker.OnValueChangeListener mOnAmPmChangedListener = new NumberPicker.OnValueChangeListener() {//更新上午还是下午 @Override public void onValueChange(NumberPicker picker, int oldVal, int newVal) { mIsAm = !mIsAm;//上午变成下午，下午变成上午 if (mIsAm) { mDate.add(Calendar.HOUR_OF_DAY, -HOURS_IN_HALF_DAY);//如果是下午变成上午，那么需要减去12小时 } else { mDate.add(Calendar.HOUR_OF_DAY, HOURS_IN_HALF_DAY);//如果是上午变成下午，那么需要加上12小时 } updateAmPmControl(); onDateTimeChanged(); } }; public interface OnDateTimeChangedListener { void onDateTimeChanged(DateTimePicker view, int year, int month, int dayOfMonth, int hourOfDay, int minute); } public DateTimePicker(Context context) { this(context, System.currentTimeMillis()); } public DateTimePicker(Context context, long date) { this(context, date, DateFormat.is24HourFormat(context)); } public DateTimePicker(Context context, long date, boolean is24HourView) { super(context); mDate = Calendar.getInstance(); mInitialising = true; mIsAm = getCurrentHourOfDay() >= HOURS_IN_HALF_DAY; inflate(context, R.layout.datetime_picker, this);//将小时、分钟和日期、在上午还是下午填充到这个文件中 mDateSpinner = (NumberPicker) findViewById(R.id.date); mDateSpinner.setMinValue(DATE_SPINNER_MIN_VAL);//选择当前月份的最小的那一天 mDateSpinner.setMaxValue(DATE_SPINNER_MAX_VAL);//选择当前月份最大的那一天 mDateSpinner.setOnValueChangedListener(mOnDateChangedListener);//设置日期监听器 mHourSpinner = (NumberPicker) findViewById(R.id.hour);//找到小时 mHourSpinner.setOnValueChangedListener(mOnHourChangedListener);//设置小时监听器 mMinuteSpinner = (NumberPicker) findViewById(R.id.minute); mMinuteSpinner.setMinValue(MINUT_SPINNER_MIN_VAL);//设置分钟最小值 mMinuteSpinner.setMaxValue(MINUT_SPINNER_MAX_VAL);//设置分钟最大值 mMinuteSpinner.setOnLongPressUpdateInterval(100);//设置按下更新的间隔是100ms mMinuteSpinner.setOnValueChangedListener(mOnMinuteChangedListener);//设置分钟监听器 String[] stringsForAmPm = new DateFormatSymbols().getAmPmStrings();//获取当前设备上的AM/PM字符串数组，第一个元素为AM，第二个元素为PM mAmPmSpinner = (NumberPicker) findViewById(R.id.amPm); mAmPmSpinner.setMinValue(AMPM_SPINNER_MIN_VAL); mAmPmSpinner.setMaxValue(AMPM_SPINNER_MAX_VAL); mAmPmSpinner.setDisplayedValues(stringsForAmPm); mAmPmSpinner.setOnValueChangedListener(mOnAmPmChangedListener);//设置上午下午监听器 // update controls to initial state updateDateControl();//更新限制 updateHourControl(); updateAmPmControl(); set24HourView(is24HourView); // set to current time setCurrentDate(date); setEnabled(isEnabled()); // set the content descriptions mInitialising = false; } @Override public void setEnabled(boolean enabled) {//用来设置组件显示出来 if (mIsEnabled == enabled) {//如果相同则不用修改 return; } super.setEnabled(enabled);//设置可行 mDateSpinner.setEnabled(enabled);//设置日期监听器可行 mMinuteSpinner.setEnabled(enabled);//设置分钟监听器可行 mHourSpinner.setEnabled(enabled);//设置小时监听器可行 mAmPmSpinner.setEnabled(enabled);//设置上午下午监听器可行 mIsEnabled = enabled;//设置为已经更新为可用 } @Override public boolean isEnabled() { return mIsEnabled; }//返回是否可用 /** * Get the current date in millis * * @return the current date in millis */ public long getCurrentDateInTimeMillis() { return mDate.getTimeInMillis(); }//获取当前的日期 /** * Set the current date * * @param date The current date in millis */ public void setCurrentDate(long date) { Calendar cal = Calendar.getInstance(); cal.setTimeInMillis(date); setCurrentDate(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DAY_OF_MONTH), cal.get(Calendar.HOUR_OF_DAY), cal.get(Calendar.MINUTE)); } /** * 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 */ public void setCurrentDate(int year, int month, int dayOfMonth, int hourOfDay, int minute) { setCurrentYear(year); setCurrentMonth(month); setCurrentDay(dayOfMonth); setCurrentHour(hourOfDay); setCurrentMinute(minute); }//设置时间 /** * Get current year * * @return The current year */ public int getCurrentYear() { return mDate.get(Calendar.YEAR); }//返回当前年 /** * Set current year * * @param year The current year */ public void setCurrentYear(int year) { if (!mInitialising && year == getCurrentYear()) {//如果已经初始化并且年份和当前的相同 return; } mDate.set(Calendar.YEAR, year);//更新 updateDateControl(); onDateTimeChanged(); } /** * Get current month in the year * * @return The current month in the year */ public int getCurrentMonth() { return mDate.get(Calendar.MONTH); }//获得月份 /** * Set current month in the year * * @param month The month in the year */ public void setCurrentMonth(int month) { if (!mInitialising && month == getCurrentMonth()) { return; } mDate.set(Calendar.MONTH, month);//更新月份 updateDateControl(); onDateTimeChanged(); } /** * Get current day of the month * * @return The day of the month */ public int getCurrentDay() { return mDate.get(Calendar.DAY_OF_MONTH); }//获取月份 /** * Set current day of the month * * @param dayOfMonth The day of the month */ public void setCurrentDay(int dayOfMonth) {//更新天 if (!mInitialising && dayOfMonth == getCurrentDay()) { return; } mDate.set(Calendar.DAY_OF_MONTH, dayOfMonth); updateDateControl(); onDateTimeChanged(); } /** * Get current hour in 24 hour mode, in the range (0~23) * @return The current hour in 24 hour mode */ public int getCurrentHourOfDay() { return mDate.get(Calendar.HOUR_OF_DAY); }//获取当前的小时 private int getCurrentHour() { if (mIs24HourView){//如果是24小时 return getCurrentHourOfDay(); } else { int hour = getCurrentHourOfDay();//获取小时 if (hour > HOURS_IN_HALF_DAY) {//如果大于12应该减去12 return hour - HOURS_IN_HALF_DAY; } else { return hour == 0 ? HOURS_IN_HALF_DAY : hour;//否则就和当前的相同 } } } /** * Set current hour in 24 hour mode, in the range (0~23) * * @param hourOfDay */ public void setCurrentHour(int hourOfDay) { if (!mInitialising && hourOfDay == getCurrentHourOfDay()) {//如果已经初始化并且和现在的小时一样就不用管 return; } mDate.set(Calendar.HOUR_OF_DAY, hourOfDay);//设置小时 if (!mIs24HourView) {//如果不是24小时制度 if (hourOfDay >= HOURS_IN_HALF_DAY) { mIsAm = false;//代表是下午 if (hourOfDay > HOURS_IN_HALF_DAY) {//如果大于12 hourOfDay -= HOURS_IN_HALF_DAY; } } else { mIsAm = true;//时上午 if (hourOfDay == 0) { hourOfDay = HOURS_IN_HALF_DAY;//代表到达了最后 } } updateAmPmControl(); } mHourSpinner.setValue(hourOfDay);//更新时间 onDateTimeChanged(); } /** * Get currentMinute * * @return The Current Minute */ public int getCurrentMinute() { return mDate.get(Calendar.MINUTE); } /** * Set current minute */ public void setCurrentMinute(int minute) { if (!mInitialising && minute == getCurrentMinute()) { return; } mMinuteSpinner.setValue(minute);//设置时间 mDate.set(Calendar.MINUTE, minute);//设置分钟 onDateTimeChanged(); } /** * @return true if this is in 24 hour view else false. */ public boolean is24HourView () { return mIs24HourView; }//返回是否是24小时制 /** * Set whether in 24 hour or AM/PM mode. * * @param is24HourView True for 24 hour mode. False for AM/PM mode. */ public void set24HourView(boolean is24HourView) { if (mIs24HourView == is24HourView) {//如果是24小时制，就无需更改 return; } mIs24HourView = is24HourView;//更改为24小时制度 mAmPmSpinner.setVisibility(is24HourView ? View.GONE : View.VISIBLE);//讲对应的界面显示出来 int hour = getCurrentHourOfDay();//获取当前的小时 updateHourControl(); setCurrentHour(hour);//更新时间 updateAmPmControl(); } private void updateDateControl() { Calendar cal = Calendar.getInstance(); cal.setTimeInMillis(mDate.getTimeInMillis()); cal.add(Calendar.DAY_OF_YEAR, -DAYS_IN_ALL_WEEK / 2 - 1);//按照一周来显示，以当前这一天为中心进行扩展 mDateSpinner.setDisplayedValues(null);//清空mDateSpinner显示的数据 for (int i = 0; i < DAYS_IN_ALL_WEEK; ++i) { cal.add(Calendar.DAY_OF_YEAR, 1);//将当前的cal的最后一个数据加1 mDateDisplayValues[i] = (String) DateFormat.format("MM.dd EEEE", cal);//格式化日期 } mDateSpinner.setDisplayedValues(mDateDisplayValues);//把加入的数据显示出来 mDateSpinner.setValue(DAYS_IN_ALL_WEEK / 2);//将选择器的初始位置设置为中心位置 mDateSpinner.invalidate();//使选择器无效，从而更新显示值 } private void updateAmPmControl() { if (mIs24HourView) {//如果是24小时制 mAmPmSpinner.setVisibility(View.GONE);//上午下午不显示 } else { int index = mIsAm ? Calendar.AM : Calendar.PM;//显示是上午还是下午 mAmPmSpinner.setValue(index);//显示对应的内容 mAmPmSpinner.setVisibility(View.VISIBLE);//可见 } } private void updateHourControl() { if (mIs24HourView) {//如果是24小时制 mHourSpinner.setMinValue(HOUR_SPINNER_MIN_VAL_24_HOUR_VIEW);//显示24小时最小值 mHourSpinner.setMaxValue(HOUR_SPINNER_MAX_VAL_24_HOUR_VIEW);//显示24小时最大值 } else { mHourSpinner.setMinValue(HOUR_SPINNER_MIN_VAL_12_HOUR_VIEW);//显示12小时最小值 mHourSpinner.setMaxValue(HOUR_SPINNER_MAX_VAL_12_HOUR_VIEW);//显示12小时最大值 } } /** * Set the callback that indicates the 'Set' button has been pressed. * @param callback the callback, if null will do nothing */ public void setOnDateTimeChangedListener(OnDateTimeChangedListener callback) { mOnDateTimeChangedListener = callback; } private void onDateTimeChanged() {//更改便签时间 if (mOnDateTimeChangedListener != null) { mOnDateTimeChangedListener.onDateTimeChanged(this, getCurrentYear(), getCurrentMonth(), getCurrentDay(), getCurrentHourOfDay(), getCurrentMinute()); } } }