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@ -18,21 +18,17 @@ package net.micode.notes.ui;
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import java.text.DateFormatSymbols;
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import java.util.Calendar;
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import net.micode.notes.R;
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import android.content.Context;
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import android.text.format.DateFormat;
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import android.view.View;
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import android.widget.FrameLayout;
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import android.widget.NumberPicker;
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//DateTimePicker功能：选择日期和时间的界面元素，FrameLayout是布局模板之一，所有的子元素全部在屏幕的右上方
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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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//初始化控件
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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_ALL_DAY = 24;
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private static final int DAYS_IN_ALL_WEEK = 7;
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@ -46,27 +42,28 @@ 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 AMPM_SPINNER_MIN_VAL = 0;
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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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//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 final NumberPicker mDateSpinner;
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private final NumberPicker mHourSpinner;
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private final NumberPicker mMinuteSpinner;
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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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//定义了Calendar类型的变量mDate，用于操作时间
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private Calendar mDate;//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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//判断输入时间是否合法的boolean常量
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private boolean mIsAm;
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private boolean mIs24HourView;
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private boolean mIsEnabled = DEFAULT_ENABLE_STATE;
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private boolean mInitialising;
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private OnDateTimeChangedListener mOnDateTimeChangedListener;//监控时间
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private OnDateTimeChangedListener mOnDateTimeChangedListener;
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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 mOnDateChangedListener = new NumberPicker.OnValueChangeListener() {
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@Override
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public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
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@ -74,49 +71,49 @@ public class DateTimePicker extends FrameLayout {
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updateDateControl();
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onDateTimeChanged();
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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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};
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//这里是对小时（Hour）的监听
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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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@Override
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public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
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boolean isDateChanged = false;
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Calendar cal = Calendar.getInstance();
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//声明一个Calendar的变量cal，便于后续的操作
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Calendar cal = Calendar.getInstance();//声明一个Calendar的变量cal，便于后续的操作
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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 (!mIs24HourView) {
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if (!mIsAm && oldVal == HOURS_IN_HALF_DAY - 1 && newVal == HOURS_IN_HALF_DAY) {
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cal.setTimeInMillis(mDate.getTimeInMillis());
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cal.add(Calendar.DAY_OF_YEAR, 1);
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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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cal.setTimeInMillis(mDate.getTimeInMillis());
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cal.add(Calendar.DAY_OF_YEAR, -1);
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isDateChanged = true;
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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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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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mIsAm = !mIsAm;
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updateAmPmControl();
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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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}
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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 {
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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.add(Calendar.DAY_OF_YEAR, 1);
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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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cal.setTimeInMillis(mDate.getTimeInMillis());
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cal.add(Calendar.DAY_OF_YEAR, -1);
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isDateChanged = true;
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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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//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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//通过set函数将新的Hour值传给mDate
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}
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int newHour = mHourSpinner.getValue() % HOURS_IN_HALF_DAY + (mIsAm ? 0 : HOURS_IN_HALF_DAY);//通过数字选择器对newHour的赋值
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mDate.set(Calendar.HOUR_OF_DAY, newHour);//通过set函数将新的Hour值传给mDate
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onDateTimeChanged();
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if (isDateChanged) {
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setCurrentYear(cal.get(Calendar.YEAR));
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@ -125,22 +122,26 @@ public class DateTimePicker extends FrameLayout {
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}
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}
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};
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//这里是对 分钟（Minute）改变的监听
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private NumberPicker.OnValueChangeListener mOnMinuteChangedListener = new NumberPicker.OnValueChangeListener() {
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@Override
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//这里是对 分钟（Minute）改变的监听
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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 maxValue = mMinuteSpinner.getMaxValue();
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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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//设置offset，作为小时改变的一个记录数据
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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 (oldVal == maxValue && newVal == minValue) {
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offset += 1;
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} else if (oldVal == minValue && newVal == maxValue) {
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offset -= 1;
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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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//hour改变对日期的影响
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if (offset != 0) {
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mDate.add(Calendar.HOUR_OF_DAY, offset);
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mHourSpinner.setValue(getCurrentHour());
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@ -158,9 +159,10 @@ public class DateTimePicker extends FrameLayout {
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onDateTimeChanged();
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}
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};
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//对AM和PM的监听
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private NumberPicker.OnValueChangeListener mOnAmPmChangedListener = new NumberPicker.OnValueChangeListener() {
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//对AM和PM的监听
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@Override
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public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
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mIsAm = !mIsAm;
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@ -174,34 +176,41 @@ public class DateTimePicker extends FrameLayout {
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}
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};
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//时间变化的监听器
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public interface OnDateTimeChangedListener {
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void onDateTimeChanged(DateTimePicker view, int year, int month,
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int dayOfMonth, int hourOfDay, int minute);
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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) {
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this(context, System.currentTimeMillis());
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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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}
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//得到一个天文数字（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) {
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this(context, date, DateFormat.is24HourFormat(context));
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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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}
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//获取系统时间
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public DateTimePicker(Context context, long date, boolean is24HourView) {
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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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mInitialising = true;
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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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//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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//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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//获取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.setMaxValue(DATE_SPINNER_MAX_VAL);
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mDateSpinner.setOnValueChangedListener(mOnDateChangedListener);
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//获取hour和minute
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mHourSpinner = (NumberPicker) findViewById(R.id.hour);
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mHourSpinner.setOnValueChangedListener(mOnHourChangedListener);
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mMinuteSpinner = (NumberPicker) findViewById(R.id.minute);
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@ -209,7 +218,8 @@ public class DateTimePicker extends FrameLayout {
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mMinuteSpinner.setMaxValue(MINUT_SPINNER_MAX_VAL);
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mMinuteSpinner.setOnLongPressUpdateInterval(100);
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mMinuteSpinner.setOnValueChangedListener(mOnMinuteChangedListener);
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//获取am和pm
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String[] stringsForAmPm = new DateFormatSymbols().getAmPmStrings();
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mAmPmSpinner = (NumberPicker) findViewById(R.id.amPm);
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mAmPmSpinner.setMinValue(AMPM_SPINNER_MIN_VAL);
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@ -217,22 +227,23 @@ public class DateTimePicker extends FrameLayout {
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mAmPmSpinner.setDisplayedValues(stringsForAmPm);
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mAmPmSpinner.setOnValueChangedListener(mOnAmPmChangedListener);
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// update controls to initial state
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// 将控件更新为初始状态
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updateDateControl();
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updateHourControl();
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updateAmPmControl();
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set24HourView(is24HourView);
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// set to current time
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// 设置为当前时间
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setCurrentDate(date);
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setEnabled(isEnabled());
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// set the content descriptions
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// 设置内容描述
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mInitialising = false;
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}
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//判断时间是否可以改变
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@Override
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public void setEnabled(boolean enabled) {
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if (mIsEnabled == enabled) {
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@ -245,43 +256,37 @@ public class DateTimePicker extends FrameLayout {
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mAmPmSpinner.setEnabled(enabled);
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mIsEnabled = enabled;
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}
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//存在疑问！！！！！！！！！！！！！setEnabled的作用
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//下面的代码通过原程序的注释已经比较清晰，另外可以通过函数名来判断
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//下面的各函数主要是对上面代码引用到的各函数功能的实现
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@Override
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public boolean isEnabled() {
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return mIsEnabled;
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}
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/**
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* Get the current date in millis
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*
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* @return the current date in millis
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* 以 millis 为单位获取当前日期
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*/
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public long getCurrentDateInTimeMillis() {
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return mDate.getTimeInMillis();
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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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*
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* @param date The current date in millis
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* 设置当前日期
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*/
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public void setCurrentDate(long date) {
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Calendar cal = Calendar.getInstance();
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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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cal.get(Calendar.HOUR_OF_DAY), cal.get(Calendar.MINUTE));
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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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*
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* @param year The current year
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* @param month The current month
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* @param dayOfMonth The current dayOfMonth
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* @param hourOfDay The current hourOfDay
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* @param minute The current minute
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* 实现函数功能——设置当前的时间
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* @param year 当前年份
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* @param month 当前月份
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* @param dayOfMonth 当前月份中哪一天
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* @param hourOfDay 当天的哪个小时
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* @param minute 当前分钟数
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*/
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public void setCurrentDate(int year, int month,
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int dayOfMonth, int hourOfDay, int minute) {
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@ -290,22 +295,23 @@ public class DateTimePicker extends FrameLayout {
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setCurrentDay(dayOfMonth);
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setCurrentHour(hourOfDay);
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setCurrentMinute(minute);
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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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//下面是得到year、month、day等值
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/**
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* Get current year
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* 获取当前年份
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*
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* @return The current year
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* @return 当前年份
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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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return mDate.get(Calendar.YEAR);
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}
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/**
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* Set current year
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* 设置当前年份
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*
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* @param year The current year
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* @param year 设置的年份
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*/
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public void setCurrentYear(int year) {
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if (!mInitialising && year == getCurrentYear()) {
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@ -316,20 +322,12 @@ public class DateTimePicker extends FrameLayout {
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onDateTimeChanged();
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}
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/**
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* Get current month in the year
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*
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* @return The current month in the year
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*/
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public int getCurrentMonth() {
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return mDate.get(Calendar.MONTH);
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|
}
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|
/**
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|
* Set current month in the year
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*
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|
* @param month The month in the year
|
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|
*/
|
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|
|
public void setCurrentMonth(int month) {
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|
if (!mInitialising && month == getCurrentMonth()) {
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|
|
return;
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|
|
@ -339,20 +337,12 @@ public class DateTimePicker extends FrameLayout {
|
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|
|
onDateTimeChanged();
|
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|
|
|
}
|
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|
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|
|
/**
|
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|
|
* Get current day of the month
|
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|
|
*
|
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|
|
* @return The day of the month
|
|
|
|
|
*/
|
|
|
|
|
|
|
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|
|
public int getCurrentDay() {
|
|
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|
|
return mDate.get(Calendar.DAY_OF_MONTH);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Set current day of the month
|
|
|
|
|
*
|
|
|
|
|
* @param dayOfMonth The day of the month
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
public void setCurrentDay(int dayOfMonth) {
|
|
|
|
|
if (!mInitialising && dayOfMonth == getCurrentDay()) {
|
|
|
|
|
return;
|
|
|
|
|
@ -362,10 +352,7 @@ public class DateTimePicker extends FrameLayout {
|
|
|
|
|
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);
|
|
|
|
|
}
|
|
|
|
|
@ -383,11 +370,7 @@ public class DateTimePicker extends FrameLayout {
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Set current hour in 24 hour mode, in the range (0~23)
|
|
|
|
|
*
|
|
|
|
|
* @param hourOfDay
|
|
|
|
|
*/
|
|
|
|
|
//24小时制
|
|
|
|
|
public void setCurrentHour(int hourOfDay) {
|
|
|
|
|
if (!mInitialising && hourOfDay == getCurrentHourOfDay()) {
|
|
|
|
|
return;
|
|
|
|
|
@ -411,18 +394,12 @@ public class DateTimePicker extends FrameLayout {
|
|
|
|
|
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;
|
|
|
|
|
@ -432,18 +409,12 @@ public class DateTimePicker extends FrameLayout {
|
|
|
|
|
onDateTimeChanged();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* @return true if this is in 24 hour view else false.
|
|
|
|
|
*/
|
|
|
|
|
//是否为24小时内
|
|
|
|
|
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.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
public void set24HourView(boolean is24HourView) {
|
|
|
|
|
if (mIs24HourView == is24HourView) {
|
|
|
|
|
return;
|
|
|
|
|
@ -455,7 +426,8 @@ public class DateTimePicker extends FrameLayout {
|
|
|
|
|
setCurrentHour(hour);
|
|
|
|
|
updateAmPmControl();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// 对于星期几的算法
|
|
|
|
|
private void updateDateControl() {
|
|
|
|
|
Calendar cal = Calendar.getInstance();
|
|
|
|
|
cal.setTimeInMillis(mDate.getTimeInMillis());
|
|
|
|
|
@ -468,8 +440,9 @@ public class DateTimePicker extends FrameLayout {
|
|
|
|
|
mDateSpinner.setDisplayedValues(mDateDisplayValues);
|
|
|
|
|
mDateSpinner.setValue(DAYS_IN_ALL_WEEK / 2);
|
|
|
|
|
mDateSpinner.invalidate();
|
|
|
|
|
}// 对于星期几的算法
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 对于AM\PM操作的算法
|
|
|
|
|
private void updateAmPmControl() {
|
|
|
|
|
if (mIs24HourView) {
|
|
|
|
|
mAmPmSpinner.setVisibility(View.GONE);
|
|
|
|
|
@ -477,7 +450,7 @@ public class DateTimePicker extends FrameLayout {
|
|
|
|
|
int index = mIsAm ? Calendar.AM : Calendar.PM;
|
|
|
|
|
mAmPmSpinner.setValue(index);
|
|
|
|
|
mAmPmSpinner.setVisibility(View.VISIBLE);
|
|
|
|
|
}// 对于上下午操作的算法
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
private void updateHourControl() {
|
|
|
|
|
@ -487,12 +460,12 @@ public class DateTimePicker extends FrameLayout {
|
|
|
|
|
} else {
|
|
|
|
|
mHourSpinner.setMinValue(HOUR_SPINNER_MIN_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.
|
|
|
|
|
* @param callback the callback, if null will do nothing
|
|
|
|
|
* 设置指示已按下“设置”按钮的回调。
|
|
|
|
|
* @param callback 如果 null，则回调将不执行任何操作
|
|
|
|
|
*/
|
|
|
|
|
public void setOnDateTimeChangedListener(OnDateTimeChangedListener callback) {
|
|
|
|
|
mOnDateTimeChangedListener = callback;
|
|
|
|
|
|
