筆記8 | 系統時間設定界面DatePickerDialog，TimePickerDialog，DatePicker

位址

最近工作的時候需要設定時間日期月曆等，最終選用的是DatePickerDialog和TimePickerDialog方法來實作，由于還沒自定義布局，直接調用就可以，實作起來挺簡單，現在通過實作和檢視源碼來進行解析；

DatePickerDialog實作和分析

主要代碼：

  int year,month,day,s,f,m;            
       private void initDataTime() {//擷取時間資訊            
       Calendar calendar = Calendar.getInstance();            
       year = calendar.get(Calendar.YEAR); //年            
       month = calendar.get(Calendar.WEEK_OF_MONTH); //月            
       day = calendar.get(Calendar.DAY_OF_YEAR); //日            
       s = calendar.get(Calendar.HOUR_OF_DAY); //時            
       f = calendar.get(Calendar.MINUTE); //分            
       m = calendar.get(Calendar.SECOND); //秒            
       }            
       DatePickerDialog.OnDateSetListener onDateSetListene = new DatePickerDialog.OnDateSetListener() {             
        
       @Override             
       public void onDateSet(DatePicker view, int year, int monthOfYear,             
       int dayOfMonth) {             
        
       }             
       };

  Button button1= (Button) findViewById(R.id.b01);//打開年月日設定界面            
       button1.setOnClickListener(new OnClickListener() {            
        
       @Override            
       public void onClick(View v) {            
       new DatePickerDialog(getApplication(), R.style.AppTheme,onDateSetListene , year,month,day);            
       }            
       });

調出系統的時間設定界面即可對系統時間進行設定，簡單明了，我們看看源碼是怎麼實作的：DatePickerDialog.class

  /*            
       * Copyright (C) 2007 The Android Open Source Project            
       *            
       * 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 android.app;            
        
       import android.content.Context;            
       import android.content.DialogInterface;            
       import android.content.DialogInterface.OnClickListener;            
       import android.os.Bundle;            
       import android.text.format.DateUtils;            
       import android.view.LayoutInflater;            
       import android.view.View;            
       import android.widget.DatePicker;            
       import android.widget.DatePicker.OnDateChangedListener;            
        
       import com.android.internal.R;            
        
       import java.util.Calendar;            
        
       /**            
       * A simple dialog containing an {@link android.widget.DatePicker}.            
       *            
       * <p>See the <a href="{@docRoot}guide/topics/ui/controls/pickers.html" target="_blank" rel="external nofollow"  target="_blank" rel="external nofollow" >Pickers</a>            
       * guide.</p>            
       */            
       public class DatePickerDialog extends AlertDialog implements OnClickListener,            
       OnDateChangedListener {            
        
       private static final String YEAR = "year";            
       private static final String MONTH = "month";            
       private static final String DAY = "day";            
        
       private final DatePicker mDatePicker; //用于存取動态的時間值            
       private final OnDateSetListener mCallBack;            
       private final Calendar mCalendar;            
        
       private boolean mTitleNeedsUpdate = true;            
        
       /**            
       * The callback used to indicate the user is done filling in the date.            
       */            
       public interface OnDateSetListener {            
        
       /**            
       * @param view The view associated with this listener.            
       * @param year The year that was set.            
       * @param monthOfYear The month that was set (0-11) for compatibility            
       * with {@link java.util.Calendar}.            
       * @param dayOfMonth The day of the month that was set.            
       */            
       void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth);            
       }            
        
       /** 方法 一            
       * @param context The context the dialog is to run in.            
       * @param callBack How the parent is notified that the date is set.            
       * @param year The initial year of the dialog.            
       * @param monthOfYear The initial month of the dialog.            
       * @param dayOfMonth The initial day of the dialog.            
       */            
       public DatePickerDialog(Context context,            
       OnDateSetListener callBack, //傳對應的方法進來，通知父節點設定日期            
       int year, //            
       int monthOfYear,            
       int dayOfMonth) {            
       this(context, 0, callBack, year, monthOfYear, dayOfMonth);            
       }            
        
       /** 方法 二            
       * @param context The context the dialog is to run in.            
       * @param theme the theme to apply to this dialog            
       * @param callBack How the parent is notified that the date is set.            
       * @param year The initial year of the dialog.            
       * @param monthOfYear The initial month of the dialog.            
       * @param dayOfMonth The initial day of the dialog.            
       * /            
       public DatePickerDialog(Context context,             
       int theme, //傳入對應的主題            
       OnDateSetListener callBack, //傳對應的時間設定方法進來，通知父節點設定日期            
       int year,            
       int monthOfYear,            
       int dayOfMonth) {            
       super(context, theme);            
        
       mCallBack = callBack;            
        
       mCalendar = Calendar.getInstance();            
        
       Context themeContext = getContext();            
       setButton(BUTTON_POSITIVE, themeContext.getText(R.string.date_time_done), this);            
       setIcon(0);            
        
       LayoutInflater inflater =            
       (LayoutInflater) themeContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);            
       View view = inflater.inflate(R.layout.date_picker_dialog, null);            
       setView(view);            
       mDatePicker = (DatePicker) view.findViewById(R.id.datePicker);             
       mDatePicker.init(year, monthOfYear, dayOfMonth, this);            
       updateTitle(year, monthOfYear, dayOfMonth);             
       }            
        
       public void onClick(DialogInterface dialog, int which) {            
       tryNotifyDateSet();            
       }            
        
       public void onDateChanged(DatePicker view, int year,            
       int month, int day) {            
       mDatePicker.init(year, month, day, this);            
       updateTitle(year, month, day);            
       }            
        
       /**            
       * Gets the {@link DatePicker} contained in this dialog.            
       *            
       * @return The calendar view.            
       */            
       public DatePicker getDatePicker() { //首先會拿到目前DatePicker            
       return mDatePicker;            
       }            
        
       /**            
       * 設定日期            
       *            
       * @param year The date year.            
       * @param monthOfYear The date month.            
       * @param dayOfMonth The date day of month.            
       */            
       public void updateDate(int year, int monthOfYear, int dayOfMonth) {            
       mDatePicker.updateDate(year, monthOfYear, dayOfMonth);            
       }            
        
       private void tryNotifyDateSet() {//将動态的時間傳給mCallBack方法            
       if (mCallBack != null) {            
       mDatePicker.clearFocus();            
       mCallBack.onDateSet(mDatePicker, mDatePicker.getYear(),             
       mDatePicker.getMonth(), mDatePicker.getDayOfMonth());            
       }            
       }            
        
       @Override            
       protected void onStop() {            
       tryNotifyDateSet();            
       super.onStop();            
       }            
        
       private void updateTitle(int year, int month, int day) {            
       if (!mDatePicker.getCalendarViewShown()) {            
       mCalendar.set(Calendar.YEAR, year);            
       mCalendar.set(Calendar.MONTH, month);            
       mCalendar.set(Calendar.DAY_OF_MONTH, day);            
       String title = DateUtils.formatDateTime(mContext,            
       mCalendar.getTimeInMillis(),            
       DateUtils.FORMAT_SHOW_DATE            
       | DateUtils.FORMAT_SHOW_WEEKDAY            
       | DateUtils.FORMAT_SHOW_YEAR            
       | DateUtils.FORMAT_ABBREV_MONTH            
       | DateUtils.FORMAT_ABBREV_WEEKDAY);            
       setTitle(title);            
       mTitleNeedsUpdate = true;            
       } else {            
       if (mTitleNeedsUpdate) {            
       mTitleNeedsUpdate = false;            
       setTitle(R.string.date_picker_dialog_title);            
       }            
       }            
       }            
        
       @Override            
       public Bundle onSaveInstanceState() {            
       Bundle state = super.onSaveInstanceState();            
       state.putInt(YEAR, mDatePicker.getYear());            
       state.putInt(MONTH, mDatePicker.getMonth());            
       state.putInt(DAY, mDatePicker.getDayOfMonth());            
       return state;            
       }            
        
       @Override            
       public void onRestoreInstanceState(Bundle savedInstanceState) {            
       super.onRestoreInstanceState(savedInstanceState);            
       int year = savedInstanceState.getInt(YEAR);            
       int month = savedInstanceState.getInt(MONTH);            
       int day = savedInstanceState.getInt(DAY);            
       mDatePicker.init(year, month, day, this);            
       }            
       }

TimePickerDialog實作和源碼

  TimePickerDialog.OnTimeSetListener onTimeSetListene = new TimePickerDialog.OnTimeSetListener() {            
        
       @Override            
       public void onTimeSet(TimePicker view, int hourOfDay, int minute) {            
        
       }            
       };            
        
       ContentResolver cv = this.getContentResolver();            
       String strTimeFormat = android.provider.Settings.System.getString(cv,            
       android.provider.Settings.System.TIME_12_24);            
       public boolean is24(){//判斷是否為24小時制            
       return strTimeFormat.equals("24");            
       }            
        
       Button button2= (Button) findViewById(R.id.b02);//彈出系統時間界面            
       button2.setOnClickListener(new OnClickListener() {            
        
       @Override            
       public void onClick(View v) {            
       new TimePickerDialog(getApplication(), onTimeSetListene, s, f, is24());            
       }            
       });

兩個源碼差不多，TimePickerDialog隻是多傳了一個is24hour進來，我就不多做解釋。TimePickerDialog.class源碼

  /*            
       * Copyright (C) 2007 The Android Open Source Project            
       *            
       * 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 android.app;            
        
       import com.android.internal.R;            
        
       import android.content.Context;            
       import android.content.DialogInterface;            
       import android.content.DialogInterface.OnClickListener;            
       import android.os.Bundle;            
       import android.view.LayoutInflater;            
       import android.view.View;            
       import android.widget.TimePicker;            
       import android.widget.TimePicker.OnTimeChangedListener;            
        
       /**            
       * A dialog that prompts the user for the time of day using a {@link TimePicker}.            
       *            
       * <p>See the <a href="{@docRoot}guide/topics/ui/controls/pickers.html" target="_blank" rel="external nofollow"  target="_blank" rel="external nofollow" >Pickers</a>            
       * guide.</p>            
       */            
       public class TimePickerDialog extends AlertDialog            
       implements OnClickListener, OnTimeChangedListener {            
        
       /**            
       * The callback interface used to indicate the user is done filling in            
       * the time (they clicked on the 'Set' button).            
       */            
       public interface OnTimeSetListener {            
        
       /**            
       * @param view The view associated with this listener.            
       * @param hourOfDay The hour that was set.            
       * @param minute The minute that was set.            
       */            
       void onTimeSet(TimePicker view, int hourOfDay, int minute);            
       }            
        
       private static final String HOUR = "hour";            
       private static final String MINUTE = "minute";            
       private static final String IS_24_HOUR = "is24hour";            
        
       private final TimePicker mTimePicker;            
       private final OnTimeSetListener mCallback;            
        
       int mInitialHourOfDay;            
       int mInitialMinute;            
       boolean mIs24HourView;            
        
       /**            
       * @param context Parent.            
       * @param callBack How parent is notified.            
       * @param hourOfDay The initial hour.            
       * @param minute The initial minute.            
       * @param is24HourView Whether this is a 24 hour view, or AM/PM.            
       */            
       public TimePickerDialog(Context context,            
       OnTimeSetListener callBack,            
       int hourOfDay, int minute, boolean is24HourView) {            
       this(context, 0, callBack, hourOfDay, minute, is24HourView);            
       }            
        
       /**            
       * @param context Parent.            
       * @param theme the theme to apply to this dialog            
       * @param callBack How parent is notified.            
       * @param hourOfDay The initial hour.            
       * @param minute The initial minute.            
       * @param is24HourView Whether this is a 24 hour view, or AM/PM.            
       */            
       public TimePickerDialog(Context context,            
       int theme,            
       OnTimeSetListener callBack,            
       int hourOfDay, int minute, boolean is24HourView) {            
       super(context, theme);            
       mCallback = callBack;            
       mInitialHourOfDay = hourOfDay;            
       mInitialMinute = minute;            
       mIs24HourView = is24HourView;            
        
       setIcon(0);            
       setTitle(R.string.time_picker_dialog_title);            
        
       Context themeContext = getContext();            
       setButton(BUTTON_POSITIVE, themeContext.getText(R.string.date_time_done), this);            
        
       LayoutInflater inflater =            
       (LayoutInflater) themeContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);            
       View view = inflater.inflate(R.layout.time_picker_dialog, null);            
       setView(view);            
       mTimePicker = (TimePicker) view.findViewById(R.id.timePicker);            
        
       // initialize state            
       mTimePicker.setIs24HourView(mIs24HourView);            
       mTimePicker.setCurrentHour(mInitialHourOfDay);            
       mTimePicker.setCurrentMinute(mInitialMinute);            
       mTimePicker.setOnTimeChangedListener(this);            
       }            
        
       public void onClick(DialogInterface dialog, int which) {            
       tryNotifyTimeSet();            
       }            
        
       public void updateTime(int hourOfDay, int minutOfHour) {            
       mTimePicker.setCurrentHour(hourOfDay);            
       mTimePicker.setCurrentMinute(minutOfHour);            
       }            
        
       public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {            
       /* do nothing */            
       }            
        
       private void tryNotifyTimeSet() {            
       if (mCallback != null) {            
       mTimePicker.clearFocus();            
       mCallback.onTimeSet(mTimePicker, mTimePicker.getCurrentHour(),            
       mTimePicker.getCurrentMinute());            
       }            
       }            
        
       @Override            
       protected void onStop() {            
       tryNotifyTimeSet();            
       super.onStop();            
       }            
        
       @Override            
       public Bundle onSaveInstanceState() {            
       Bundle state = super.onSaveInstanceState();            
       state.putInt(HOUR, mTimePicker.getCurrentHour());            
       state.putInt(MINUTE, mTimePicker.getCurrentMinute());            
       state.putBoolean(IS_24_HOUR, mTimePicker.is24HourView());            
       return state;            
       }            
        
       @Override            
       public void onRestoreInstanceState(Bundle savedInstanceState) {            
       super.onRestoreInstanceState(savedInstanceState);            
       int hour = savedInstanceState.getInt(HOUR);            
       int minute = savedInstanceState.getInt(MINUTE);            
       mTimePicker.setIs24HourView(savedInstanceState.getBoolean(IS_24_HOUR));            
       mTimePicker.setCurrentHour(hour);            
       mTimePicker.setCurrentMinute(minute);            
       }            
       }

DatePicker月曆的調用

  <DatePicker            
       android:id="@+id/textView1"            
       android:layout_width="match_parent"            
       android:layout_height="match_parent"            
       android:text="TextView" />

是的，隻需這麼個玩意就可以調出感覺很高大上的月曆界面，源碼就不貼了，太長，如果要自定義界面的話可以研究一下！```

筆記8 | 系統時間設定界面DatePickerDialog，TimePickerDialog，DatePicker

位址

目錄

DatePickerDialog實作和分析

TimePickerDialog實作和源碼

DatePicker月曆的調用

繼續閱讀

TimePickerDialog和DatePickerDialog使用

DatePickerDialog使用

DatePickerDialog使用方法

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DatePickerDialog簡介

超簡單的DatePickerDialog！

DatePickerDialog 簡單用法

Android TimePickerDialog 有效果圖

TimePickerDialog樣式配置與TimePicker模式選擇

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