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@ -28,8 +28,23 @@ import android.view.View;
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import android.widget.FrameLayout;
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import android.widget.FrameLayout;
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import android.widget.NumberPicker;
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import android.widget.NumberPicker;
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/**
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*
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* @ProjectName:
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* @Package: net.micode.notes.ui
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* @ClassName: DateTimePicker
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* @Description: 用于选择日期和时间的自定义视图,包括年、月、日、时、分等选择器。
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* 它使用了NumberPicker控件来实现日期和时间的选择功能,并提供了一些回调接口以便在日期和时间改变时进行通知。
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* @Author: xumingyang
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* @CreateDate: 2023-12-24 12:58
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* @UpdateUser: 更新者:
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* @UpdateDate: 2023-12-24 12:58
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* @UpdateRemark: 更新说明:
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* @Version: 1.0
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*/
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public class DateTimePicker extends FrameLayout {
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public class DateTimePicker extends FrameLayout {
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//FrameLayout是布局模板之一
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//所有的子元素全部在屏幕的右上方
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private static final boolean DEFAULT_ENABLE_STATE = true;
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private static final boolean DEFAULT_ENABLE_STATE = true;
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private static final int HOURS_IN_HALF_DAY = 12;
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private static final int HOURS_IN_HALF_DAY = 12;
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@ -45,13 +60,15 @@ public class DateTimePicker extends FrameLayout {
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private static final int MINUT_SPINNER_MAX_VAL = 59;
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private static final int MINUT_SPINNER_MAX_VAL = 59;
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private static final int AMPM_SPINNER_MIN_VAL = 0;
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private static final int AMPM_SPINNER_MIN_VAL = 0;
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private static final int AMPM_SPINNER_MAX_VAL = 1;
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private static final int AMPM_SPINNER_MAX_VAL = 1;
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//初始化控件
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private final NumberPicker mDateSpinner;
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private final NumberPicker mDateSpinner;
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private final NumberPicker mHourSpinner;
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private final NumberPicker mHourSpinner;
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private final NumberPicker mMinuteSpinner;
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private final NumberPicker mMinuteSpinner;
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private final NumberPicker mAmPmSpinner;
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private final NumberPicker mAmPmSpinner;
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//NumberPicker是数字选择器
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//这里定义的四个变量全部是在设置闹钟时需要选择的变量(如日期、时、分、上午或者下午)
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private Calendar mDate;
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private Calendar mDate;
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//定义了Calendar类型的变量mDate,用于操作时间
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private String[] mDateDisplayValues = new String[DAYS_IN_ALL_WEEK];
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private String[] mDateDisplayValues = new String[DAYS_IN_ALL_WEEK];
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private boolean mIsAm;
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private boolean mIsAm;
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@ -72,8 +89,22 @@ public class DateTimePicker extends FrameLayout {
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onDateTimeChanged();
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onDateTimeChanged();
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}
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}
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};
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};
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//OnValueChangeListener,这是时间改变监听器,这里主要是对日期的监听
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//将现在日期的值传递给mDate;updateDateControl是同步操作
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private NumberPicker.OnValueChangeListener mOnHourChangedListener = new NumberPicker.OnValueChangeListener() {
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private NumberPicker.OnValueChangeListener mOnHourChangedListener = new NumberPicker.OnValueChangeListener() {
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//这里是对 小时(Hour) 的监听
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/**
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* @method onValueChange
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* @description 这段代码是一个回调函数,用于监听NumberPicker的数值改变事件。
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* 当用户改变了时间选择器中的小时数时,就会触发这个回调函数。
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* 在函数中,首先判断当前选择器是否为24小时制,如果不是则需要处理上下午的切换和跨天的情况。
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* @date: 2023-12-24 13:03
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* @author: xumingyang
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* @param *声明一个Calendar的变量cal,便于后续的操作
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* @return isdateChanged bool类型 判断是否需要对时间进行调整
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*/
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@Override
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@Override
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public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
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public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
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boolean isDateChanged = false;
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boolean isDateChanged = false;
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@ -83,29 +114,33 @@ public class DateTimePicker extends FrameLayout {
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cal.setTimeInMillis(mDate.getTimeInMillis());
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cal.setTimeInMillis(mDate.getTimeInMillis());
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cal.add(Calendar.DAY_OF_YEAR, 1);
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cal.add(Calendar.DAY_OF_YEAR, 1);
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isDateChanged = true;
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isDateChanged = true;
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//这里是对于12小时制时,晚上11点和12点交替时对日期的更改
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} else if (mIsAm && oldVal == HOURS_IN_HALF_DAY && newVal == HOURS_IN_HALF_DAY - 1) {
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} else if (mIsAm && oldVal == HOURS_IN_HALF_DAY && newVal == HOURS_IN_HALF_DAY - 1) {
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cal.setTimeInMillis(mDate.getTimeInMillis());
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cal.setTimeInMillis(mDate.getTimeInMillis());
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cal.add(Calendar.DAY_OF_YEAR, -1);
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cal.add(Calendar.DAY_OF_YEAR, -1);
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isDateChanged = true;
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isDateChanged = true;
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}
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}//这里是对于12小时制时,晚上11点和12点交替时对日期的更改
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if (oldVal == HOURS_IN_HALF_DAY - 1 && newVal == HOURS_IN_HALF_DAY ||
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if (oldVal == HOURS_IN_HALF_DAY - 1 && newVal == HOURS_IN_HALF_DAY ||
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oldVal == HOURS_IN_HALF_DAY && newVal == HOURS_IN_HALF_DAY - 1) {
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oldVal == HOURS_IN_HALF_DAY && newVal == HOURS_IN_HALF_DAY - 1) {
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mIsAm = !mIsAm;
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mIsAm = !mIsAm;
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updateAmPmControl();
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updateAmPmControl();
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}
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}//这里是对于12小时制时,中午11点和12点交替时对AM和PM的更改
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} else {
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} else {
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if (oldVal == HOURS_IN_ALL_DAY - 1 && newVal == 0) {
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if (oldVal == HOURS_IN_ALL_DAY - 1 && newVal == 0) {
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cal.setTimeInMillis(mDate.getTimeInMillis());
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cal.setTimeInMillis(mDate.getTimeInMillis());
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cal.add(Calendar.DAY_OF_YEAR, 1);
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cal.add(Calendar.DAY_OF_YEAR, 1);
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isDateChanged = true;
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isDateChanged = true;
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//这里是对于24小时制时,晚上11点和12点交替时对日期的更改
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} else if (oldVal == 0 && newVal == HOURS_IN_ALL_DAY - 1) {
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} else if (oldVal == 0 && newVal == HOURS_IN_ALL_DAY - 1) {
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cal.setTimeInMillis(mDate.getTimeInMillis());
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cal.setTimeInMillis(mDate.getTimeInMillis());
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cal.add(Calendar.DAY_OF_YEAR, -1);
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cal.add(Calendar.DAY_OF_YEAR, -1);
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isDateChanged = true;
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isDateChanged = true;
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}
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}
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}
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}//这里是对于12小时制时,凌晨11点和12点交替时对日期的更改
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int newHour = mHourSpinner.getValue() % HOURS_IN_HALF_DAY + (mIsAm ? 0 : HOURS_IN_HALF_DAY);
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int newHour = mHourSpinner.getValue() % HOURS_IN_HALF_DAY + (mIsAm ? 0 : HOURS_IN_HALF_DAY);
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//通过数字选择器对newHour的赋值
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mDate.set(Calendar.HOUR_OF_DAY, newHour);
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mDate.set(Calendar.HOUR_OF_DAY, newHour);
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//通过set函数将新的Hour值传给mDate
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onDateTimeChanged();
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onDateTimeChanged();
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if (isDateChanged) {
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if (isDateChanged) {
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setCurrentYear(cal.get(Calendar.YEAR));
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setCurrentYear(cal.get(Calendar.YEAR));
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@ -116,16 +151,25 @@ public class DateTimePicker extends FrameLayout {
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};
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};
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private NumberPicker.OnValueChangeListener mOnMinuteChangedListener = new NumberPicker.OnValueChangeListener() {
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private NumberPicker.OnValueChangeListener mOnMinuteChangedListener = new NumberPicker.OnValueChangeListener() {
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/**
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* @method onValueChange
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* @description 用于监控 NumberPicker(数字选择器)的数值变化事件。
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* 具体来说,这个监听器是用于监听分钟选择器的数值变化。
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* @param *三个参数:picker(当前的 NumberPicker 对象)、oldVal(旧值)和 newVal(新值)
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*/
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@Override
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@Override
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public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
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public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
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int minValue = mMinuteSpinner.getMinValue();
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int minValue = mMinuteSpinner.getMinValue();
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int maxValue = mMinuteSpinner.getMaxValue();
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int maxValue = mMinuteSpinner.getMaxValue();
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int offset = 0;
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int offset = 0;
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//设置offset,作为小时改变的一个记录数据
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if (oldVal == maxValue && newVal == minValue) {
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if (oldVal == maxValue && newVal == minValue) {
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offset += 1;
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offset += 1;
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} else if (oldVal == minValue && newVal == maxValue) {
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} else if (oldVal == minValue && newVal == maxValue) {
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offset -= 1;
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offset -= 1;
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}
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}
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//如果原值为59,新值为0,则offset加1
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//如果原值为0,新值为59,则offset减1
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if (offset != 0) {
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if (offset != 0) {
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mDate.add(Calendar.HOUR_OF_DAY, offset);
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mDate.add(Calendar.HOUR_OF_DAY, offset);
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mHourSpinner.setValue(getCurrentHour());
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mHourSpinner.setValue(getCurrentHour());
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@ -145,9 +189,15 @@ public class DateTimePicker extends FrameLayout {
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};
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};
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private NumberPicker.OnValueChangeListener mOnAmPmChangedListener = new NumberPicker.OnValueChangeListener() {
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private NumberPicker.OnValueChangeListener mOnAmPmChangedListener = new NumberPicker.OnValueChangeListener() {
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/**
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* @method onValueChange
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* @description 实现了一个监听器,用于监测用户对NumberPicker控件数值的改变,
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* 并根据改变的数值来更新界面上的上午/下午控件
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*/
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@Override
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@Override
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public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
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public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
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mIsAm = !mIsAm;
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mIsAm = !mIsAm;
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//对AM和PM的监听
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if (mIsAm) {
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if (mIsAm) {
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mDate.add(Calendar.HOUR_OF_DAY, -HOURS_IN_HALF_DAY);
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mDate.add(Calendar.HOUR_OF_DAY, -HOURS_IN_HALF_DAY);
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} else {
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} else {
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@ -166,18 +216,25 @@ public class DateTimePicker extends FrameLayout {
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public DateTimePicker(Context context) {
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public DateTimePicker(Context context) {
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this(context, System.currentTimeMillis());
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this(context, System.currentTimeMillis());
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}
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}
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//通过对数据库的访问,获取当前的系统时间
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public DateTimePicker(Context context, long date) {
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public DateTimePicker(Context context, long date) {
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this(context, date, DateFormat.is24HourFormat(context));
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this(context, date, DateFormat.is24HourFormat(context));
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}
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}
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//上面函数的得到的是一个天文数字(1970至今的秒数),需要DateFormat将其变得有意义
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public DateTimePicker(Context context, long date, boolean is24HourView) {
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public DateTimePicker(Context context, long date, boolean is24HourView) {
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super(context);
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super(context);
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//获取系统时间
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mDate = Calendar.getInstance();
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mDate = Calendar.getInstance();
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mInitialising = true;
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mInitialising = true;
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mIsAm = getCurrentHourOfDay() >= HOURS_IN_HALF_DAY;
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mIsAm = getCurrentHourOfDay() >= HOURS_IN_HALF_DAY;
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inflate(context, R.layout.datetime_picker, this);
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inflate(context, R.layout.datetime_picker, this);
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/*
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* 如果当前Activity里用到别的layout,比如对话框layout
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* 还要设置这个layout上的其他组件的内容,就必须用inflate()方法先将对话框的layout找出来
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* 然后再用findViewById()找到它上面的其它组件
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*/
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mDateSpinner = (NumberPicker) findViewById(R.id.date);
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mDateSpinner = (NumberPicker) findViewById(R.id.date);
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mDateSpinner.setMinValue(DATE_SPINNER_MIN_VAL);
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mDateSpinner.setMinValue(DATE_SPINNER_MIN_VAL);
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mDateSpinner.setMaxValue(DATE_SPINNER_MAX_VAL);
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mDateSpinner.setMaxValue(DATE_SPINNER_MAX_VAL);
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@ -214,17 +271,28 @@ public class DateTimePicker extends FrameLayout {
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mInitialising = false;
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mInitialising = false;
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}
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}
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/**
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* @method setEnabled
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* @description 这个函数用于统一设置控件及其相关子控件的可用状态,并且会根据传入的参数值进行相应的操作
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* @param *布尔值 enabled,用于指定控件是否可用。
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* @return 将 mIsEnabled 的值更新为传入的 enabled,以保持状态同步
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*/
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@Override
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@Override
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public void setEnabled(boolean enabled) {
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public void setEnabled(boolean enabled) {
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if (mIsEnabled == enabled) {
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if (mIsEnabled == enabled) {
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return;
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return;
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}
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}
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/*
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* 如果传入的参数 enabled 与当前的控件可用状态 mIsEnabled 相同,则无需进行任何操作,直接返回。
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* 这样可以避免重复设置控件的可用状态。
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*/
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super.setEnabled(enabled);
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super.setEnabled(enabled);
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mDateSpinner.setEnabled(enabled);
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mDateSpinner.setEnabled(enabled);
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mMinuteSpinner.setEnabled(enabled);
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mMinuteSpinner.setEnabled(enabled);
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mHourSpinner.setEnabled(enabled);
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mHourSpinner.setEnabled(enabled);
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mAmPmSpinner.setEnabled(enabled);
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mAmPmSpinner.setEnabled(enabled);
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mIsEnabled = enabled;
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mIsEnabled = enabled;
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//将 mIsEnabled 的值更新为传入的 enabled,以保持状态同步
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}
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}
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@Override
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@Override
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@ -239,7 +307,7 @@ public class DateTimePicker extends FrameLayout {
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*/
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*/
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public long getCurrentDateInTimeMillis() {
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public long getCurrentDateInTimeMillis() {
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return mDate.getTimeInMillis();
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return mDate.getTimeInMillis();
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}
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}//实现函数——得到当前的秒数
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/**
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/**
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* Set the current date
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* Set the current date
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@ -251,7 +319,7 @@ public class DateTimePicker extends FrameLayout {
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cal.setTimeInMillis(date);
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cal.setTimeInMillis(date);
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setCurrentDate(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DAY_OF_MONTH),
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setCurrentDate(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DAY_OF_MONTH),
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cal.get(Calendar.HOUR_OF_DAY), cal.get(Calendar.MINUTE));
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cal.get(Calendar.HOUR_OF_DAY), cal.get(Calendar.MINUTE));
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}
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}//实现函数功能——设置当前的时间,参数是date
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/**
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/**
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* Set the current date
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* Set the current date
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@ -269,13 +337,14 @@ public class DateTimePicker extends FrameLayout {
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setCurrentDay(dayOfMonth);
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setCurrentDay(dayOfMonth);
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setCurrentHour(hourOfDay);
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setCurrentHour(hourOfDay);
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setCurrentMinute(minute);
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setCurrentMinute(minute);
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}
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}//实现函数功能——设置当前的时间,参数是各详细的变量
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/**
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/**
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|
* Get current year
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* Get current year
|
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*
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*
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* @return The current year
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* @return The current year
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*/
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*/
|
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|
//下面是得到year、month、day等值
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|
public int getCurrentYear() {
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|
public int getCurrentYear() {
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|
return mDate.get(Calendar.YEAR);
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|
|
return mDate.get(Calendar.YEAR);
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}
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}
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|
@ -446,7 +515,7 @@ public class DateTimePicker extends FrameLayout {
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mDateSpinner.setDisplayedValues(mDateDisplayValues);
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|
mDateSpinner.setDisplayedValues(mDateDisplayValues);
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|
|
mDateSpinner.setValue(DAYS_IN_ALL_WEEK / 2);
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|
|
mDateSpinner.setValue(DAYS_IN_ALL_WEEK / 2);
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|
|
mDateSpinner.invalidate();
|
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|
|
mDateSpinner.invalidate();
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|
|
}
|
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|
}// 对于星期几的算法
|
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|
|
private void updateAmPmControl() {
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|
|
private void updateAmPmControl() {
|
|
|
|
if (mIs24HourView) {
|
|
|
|
if (mIs24HourView) {
|
|
|
@ -456,7 +525,7 @@ public class DateTimePicker extends FrameLayout {
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|
|
mAmPmSpinner.setValue(index);
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|
|
mAmPmSpinner.setValue(index);
|
|
|
|
mAmPmSpinner.setVisibility(View.VISIBLE);
|
|
|
|
mAmPmSpinner.setVisibility(View.VISIBLE);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}// 对于上下午操作的算法
|
|
|
|
|
|
|
|
|
|
|
|
private void updateHourControl() {
|
|
|
|
private void updateHourControl() {
|
|
|
|
if (mIs24HourView) {
|
|
|
|
if (mIs24HourView) {
|
|
|
@ -466,7 +535,7 @@ public class DateTimePicker extends FrameLayout {
|
|
|
|
mHourSpinner.setMinValue(HOUR_SPINNER_MIN_VAL_12_HOUR_VIEW);
|
|
|
|
mHourSpinner.setMinValue(HOUR_SPINNER_MIN_VAL_12_HOUR_VIEW);
|
|
|
|
mHourSpinner.setMaxValue(HOUR_SPINNER_MAX_VAL_12_HOUR_VIEW);
|
|
|
|
mHourSpinner.setMaxValue(HOUR_SPINNER_MAX_VAL_12_HOUR_VIEW);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}// 对与小时的算法
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
/**
|
|
|
|
* Set the callback that indicates the 'Set' button has been pressed.
|
|
|
|
* Set the callback that indicates the 'Set' button has been pressed.
|
|
|
|