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79 lines
3.4 KiB
79 lines
3.4 KiB
// Apache许可证协议
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package net.micode.notes.ui;
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import android.app.AlertDialog;
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import android.content.Context;
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import android.content.DialogInterface;
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import android.content.DialogInterface.OnClickListener;
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import android.text.format.DateFormat;
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import android.text.format.DateUtils;
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import net.micode.notes.R;
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import net.micode.notes.ui.DateTimePicker.OnDateTimeChangedListener;
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import java.util.Calendar;
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public class DateTimePickerDialog extends AlertDialog implements OnClickListener {
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private Calendar mDate = Calendar.getInstance();
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private boolean mIs24HourView;
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private OnDateTimeSetListener mOnDateTimeSetListener;
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private DateTimePicker mDateTimePicker;
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public interface OnDateTimeSetListener {
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void OnDateTimeSet(AlertDialog dialog, long date);
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}
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// 实现了一个 OnDateTimeSetListener 接口，该接口定义了一个 OnDateTimeSet() 方法，用于在用户选择日期时间后通知调用者。
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public DateTimePickerDialog(Context context, long date) {
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super(context);
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mDateTimePicker = new DateTimePicker(context);
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setView(mDateTimePicker);
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mDateTimePicker.setOnDateTimeChangedListener(new OnDateTimeChangedListener() {
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public void onDateTimeChanged(DateTimePicker view, int year, int month,
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int dayOfMonth, int hourOfDay, int minute) {
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mDate.set(Calendar.YEAR, year);
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mDate.set(Calendar.MONTH, month);
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mDate.set(Calendar.DAY_OF_MONTH, dayOfMonth);
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mDate.set(Calendar.HOUR_OF_DAY, hourOfDay);
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mDate.set(Calendar.MINUTE, minute);
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updateTitle(mDate.getTimeInMillis());
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}
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});
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// 包含了一个 DateTimePicker 控件，用于让用户选择日期和时间。通过 mDateTimePicker.setOnDateTimeChangedListener() 方法，当用户选择日期和时间时，将更新 mDate 的值，并使用 updateTitle() 方法更新对话框的标题。
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mDate.setTimeInMillis(date);
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mDate.set(Calendar.SECOND, 0);
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mDateTimePicker.setCurrentDate(mDate.getTimeInMillis());
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setButton(context.getString(R.string.datetime_dialog_ok), this);
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setButton2(context.getString(R.string.datetime_dialog_cancel), (OnClickListener)null);
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set24HourView(DateFormat.is24HourFormat(this.getContext()));
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updateTitle(mDate.getTimeInMillis());
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}
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public void set24HourView(boolean is24HourView) {
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mIs24HourView = is24HourView;
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}
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//set24HourView() 方法，用于设置日期时间选择器是否为 24 小时格式。默认情况下，该值将由系统的设置决定。
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public void setOnDateTimeSetListener(OnDateTimeSetListener callBack) {
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mOnDateTimeSetListener = callBack;
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}
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private void updateTitle(long date) {
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int flag =
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DateUtils.FORMAT_SHOW_YEAR |
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DateUtils.FORMAT_SHOW_DATE |
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DateUtils.FORMAT_SHOW_TIME;
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flag |= mIs24HourView ? DateUtils.FORMAT_24HOUR : DateUtils.FORMAT_24HOUR;
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setTitle(DateUtils.formatDateTime(this.getContext(), date, flag));
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}
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public void onClick(DialogInterface arg0, int arg1) {
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if (mOnDateTimeSetListener != null) {
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mOnDateTimeSetListener.OnDateTimeSet(this, mDate.getTimeInMillis());
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}
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}
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// 重写了 onClick() 方法，以便在用户点击“确定”按钮后，将用户选择的日期时间作为参数传递到 OnDateTimeSet() 方法中，从而通知调用者。
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} |