From 71408d1786c1b573d6416947ecd5c98d75a56330 Mon Sep 17 00:00:00 2001 From: pc7elugyz <18644716229@163.com> Date: Fri, 21 Apr 2023 13:46:46 +0800 Subject: [PATCH] ADD file via upload --- doc/标注/210340060_梁鸿斌.txt | 1027 ++++++++++++++++++++++++++++ 1 file changed, 1027 insertions(+) create mode 100644 doc/标注/210340060_梁鸿斌.txt diff --git a/doc/标注/210340060_梁鸿斌.txt b/doc/标注/210340060_梁鸿斌.txt new file mode 100644 index 0000000..381224d --- /dev/null +++ b/doc/标注/210340060_梁鸿斌.txt @@ -0,0 +1,1027 @@ +AlarmAlertActivity.java + + + +package net.micode.notes.ui; + +import android.app.Activity; +import android.app.AlertDialog; +import android.content.Context; +import android.content.DialogInterface; +import android.content.DialogInterface.OnClickListener; +import android.content.DialogInterface.OnDismissListener; +import android.content.Intent; +import android.media.AudioManager; +import android.media.MediaPlayer; +import android.media.RingtoneManager; +import android.net.Uri; +import android.os.Bundle; +import android.os.PowerManager; +import android.provider.Settings; +import android.view.Window; +import android.view.WindowManager; + +import net.micode.notes.R; +import net.micode.notes.data.Notes; +import net.micode.notes.tool.DataUtils; + +import java.io.IOException;//以上是引入依赖部分 + +public class AlarmAlertActivity extends Activity implements OnClickListener, OnDismissListener {//这是一个主类 + private long mNoteId; //代表用户的文本在数据库存储中的ID + private String mSnippet; //当闹钟进行提示时出现的文本片段 + private static final int SNIPPET_PREW_MAX_LEN = 60;//定义了一个静态的变量 + MediaPlayer mPlayer;//用于播放音频文件 + + @Override//这是java中的一个覆盖方法(override method) + protected void onCreate(Bundle savedInstanceState) { + super.onCreate(savedInstanceState); + //Bundle类型的数据与Map类型的数据相似，都是以key-value的形式存储数据的 + //onsaveInstanceState方法是用来保存Activity的状态的 + //能从onCreate的参数savedInsanceState中获得状态数据 + requestWindowFeature(Window.FEATURE_NO_TITLE); //将界面显示设置成无标题 + + final Window win = getWindow();//表示在屏幕锁定状态下也允许当前Activity显示。这样就可以让当前Activity在设备处于锁定状态时也可以弹出来。 + win.addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);//它在锁屏状态下可以使一个Activity窗口始终显示在锁屏界面之上。 + + if (!isScreenOn()) { + win.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON + //保持窗体点亮 + | WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON + //将窗体点亮 + | WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON + //允许窗体点亮时锁屏 + | WindowManager.LayoutParams.FLAG_LAYOUT_INSET_DECOR); + }//锁屏后如果到了闹钟提示时间就点亮屏幕 + + Intent intent = getIntent(); + + try { + mNoteId = Long.valueOf(intent.getData().getPathSegments().get(1)); + mSnippet = DataUtils.getSnippetById(this.getContentResolver(), mNoteId); + //根据ID从数据库中获取标签的内容； + //getContentResolver（）是实现数据共享，存储。 + mSnippet = mSnippet.length() > SNIPPET_PREW_MAX_LEN ? mSnippet.substring(0, + SNIPPET_PREW_MAX_LEN) + getResources().getString(R.string.notelist_string_info) + : mSnippet; + //判断标签是否达到符合长度 + } catch (IllegalArgumentException e) { + e.printStackTrace(); + return; + } + /* + try + { + // 代码区域 + } + catch(Exception e) + { + // 异常处理 + } + 代码区如果有错误，就会返回所写异常的处理。*/ + mPlayer = new MediaPlayer(); + if (DataUtils.visibleInNoteDatabase(getContentResolver(), mNoteId, Notes.TYPE_NOTE)) { + showActionDialog(); + //对话框弹出 + playAlarmSound(); + //闹钟提示音触发 + } else { + finish(); + //完成闹钟动作 + } + } + + private boolean isScreenOn() { + //判断屏幕是否锁屏，最后返回值是布尔类型，即为true或false + PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE); + return pm.isScreenOn(); + } + + private void playAlarmSound() { + //闹钟提示音触发 + Uri url = RingtoneManager.getActualDefaultRingtoneUri(this, RingtoneManager.TYPE_ALARM); + //调用系统的铃声，得到提示音 + int silentModeStreams = Settings.System.getInt(getContentResolver(), + Settings.System.MODE_RINGER_STREAMS_AFFECTED, 0); + + if ((silentModeStreams & (1 << AudioManager.STREAM_ALARM)) != 0) { + mPlayer.setAudioStreamType(silentModeStreams); + } else { + mPlayer.setAudioStreamType(AudioManager.STREAM_ALARM); + } + try { + mPlayer.setDataSource(this, url); + //无返回值，设置多媒体音频来源 + mPlayer.prepare(); + //准备同步 + mPlayer.setLooping(true); + //设置是否循环播放 + mPlayer.start(); + //开始播放 + } catch (IllegalArgumentException e) { + // TODO Auto-generated catch block + e.printStackTrace(); + //e.printStackTrace()抛出异常， 还将显示出更深的调用信息 + //System.out.println(e)打印异常，并且输出异常地点 + } catch (SecurityException e) { + // TODO Auto-generated catch block + e.printStackTrace(); + } catch (IllegalStateException e) { + // TODO Auto-generated catch block + e.printStackTrace(); + } catch (IOException e) { + // TODO Auto-generated catch block + e.printStackTrace(); + } + } + + private void showActionDialog() { + AlertDialog.Builder dialog = new AlertDialog.Builder(this); + //AlertDialog的构造方法全部是Protected的 + //所以不能直接通过new一个AlertDialog来创建出一个AlertDialog。 + //要创建一个AlertDialog，就要用到AlertDialog.Builder中的create()方法 + //如这里的dialog就是新建了一个AlertDialog + dialog.setTitle(R.string.app_name); + //为对话框设置标题 + dialog.setMessage(mSnippet); + //为对话框设置内容 + dialog.setPositiveButton(R.string.notealert_ok, this); + //给对话框添加"Yes"按钮 + if (isScreenOn()) { + dialog.setNegativeButton(R.string.notealert_enter, this); + }//对话框添加"No"按钮 + dialog.show().setOnDismissListener(this); + } + + public void onClick(DialogInterface dialog, int which) { + switch (which) { + //用which来选择click后下一步的操作 + case DialogInterface.BUTTON_NEGATIVE: + //取消操作 + Intent intent = new Intent(this, NoteEditActivity.class); + //实现两个类间的数据传输 + intent.setAction(Intent.ACTION_VIEW); + //设置动作属性 + intent.putExtra(Intent.EXTRA_UID, mNoteId); + //实现key-value对 + //EXTRA_UID为key；mNoteId为键 + startActivity(intent); + //开始动作 + break; + default: + //这是确定操作 + break; + } + } + + public void onDismiss(DialogInterface dialog) { + //忽略 + stopAlarmSound(); + //停止闹钟声音 + finish(); + //完成该动作 + } + + private void stopAlarmSound() { + if (mPlayer != null) { + mPlayer.stop();//停止音乐播放 + mPlayer.release(); //释放MediaPlayer对象 + mPlayer = null;//，释放相关的资源 + } + } +} + + + + + + +AlarmInitReceiver.java + +package net.micode.notes.ui; + +import android.app.AlarmManager; +import android.app.PendingIntent; +import android.content.BroadcastReceiver; +import android.content.ContentUris; +import android.content.Context; +import android.content.Intent; +import android.database.Cursor; + +import net.micode.notes.data.Notes; +import net.micode.notes.data.Notes.NoteColumns; + +//以上是引入依赖 +public class AlarmInitReceiver extends BroadcastReceiver {//这是一个主类 + + private static final String [] PROJECTION = new String [] { + NoteColumns.ID, + NoteColumns.ALERTED_DATE + }; + //调用标签ID和闹钟时间 + private static final int COLUMN_ID = 0; + private static final int COLUMN_ALERTED_DATE = 1; + + @Override + public void onReceive(Context context, Intent intent) { + long currentDate = System.currentTimeMillis(); //产生一个当前的毫秒，自1970年1月1日0时起的毫秒数 + Cursor c = context.getContentResolver().query(Notes.CONTENT_NOTE_URI, + PROJECTION, + NoteColumns.ALERTED_DATE + ">? AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE, + new String[] { String.valueOf(currentDate) },//将currentDate从long转化为字符串 + null); + //从数据库中找到和当前系统时间相等的标签 + + if (c != null) { + if (c.moveToFirst()) { + do { + long alertDate = c.getLong(COLUMN_ALERTED_DATE); + Intent sender = new Intent(context, AlarmReceiver.class); + //新建intend + sender.setData(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, c.getLong(COLUMN_ID))); + PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, sender, 0); + AlarmManager alermManager = (AlarmManager) context + .getSystemService(Context.ALARM_SERVICE); + alermManager.set(AlarmManager.RTC_WAKEUP, alertDate, pendingIntent); + } while (c.moveToNext()); + } + c.close(); + } + //根据数据库里的闹钟时间创建一个闹钟机制 + } +} + + + + + + + +AlarmReceiver.java + + + +package net.micode.notes.ui; + +import android.content.BroadcastReceiver; +import android.content.Context; +import android.content.Intent; + +//以上是引入依赖 +public class AlarmReceiver extends BroadcastReceiver { +//这是一个主类 + @Override + public void onReceive(Context context, Intent intent) { + intent.setClass(context, AlarmAlertActivity.class); + //用来启动AlarmAlertActivity + intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); + //activity要存在于activity的栈中 + //所以要新起一个栈装入启动的activity + context.startActivity(intent); + } +} + + + + + + + + + +DateTimePicker.java + + + + + +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; + +//以上是引入依赖 +public class DateTimePicker extends FrameLayout { +//这是一个主类 + //FrameLayout是布局模板之一 + //所有的选项全部在屏幕的右上方 + 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; + //控件的初始化 + private final NumberPicker mDateSpinner; + private final NumberPicker mHourSpinner; + private final NumberPicker mMinuteSpinner; + private final NumberPicker mAmPmSpinner; + //NumberPicker是数字选择器，这些变量是日期、时、分、上午或者下午 + private Calendar mDate; + //mDate，用于操作时间 + 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() { +//OnValueChangeListener，这是时间改变监听器，这里主要是对日期的监听 + @Override + public void onValueChange(NumberPicker picker, int oldVal, int newVal) { + mDate.add(Calendar.DAY_OF_YEAR, newVal - oldVal); + updateDateControl(); +//updateDateControl是同步更新操作 + onDateTimeChanged(); + } + }; + //将现在日期的值传递给mDate； + + private NumberPicker.OnValueChangeListener mOnHourChangedListener = new NumberPicker.OnValueChangeListener() { + //这里是对Hour的监听 + @Override + public void onValueChange(NumberPicker picker, int oldVal, int newVal) { + boolean isDateChanged = false; + Calendar cal = Calendar.getInstance(); + //声明一个Calendar的变量cal，便于后续的操作 + if (!mIs24HourView) { + if (!mIsAm && oldVal == HOURS_IN_HALF_DAY - 1 && newVal == HOURS_IN_HALF_DAY) { + cal.setTimeInMillis(mDate.getTimeInMillis()); + cal.add(Calendar.DAY_OF_YEAR, 1); + isDateChanged = true; + //这里是对于12小时制时，中午11点和12点交替时对日期的更改 + } else if (mIsAm && oldVal == HOURS_IN_HALF_DAY && newVal == HOURS_IN_HALF_DAY - 1) { + cal.setTimeInMillis(mDate.getTimeInMillis()); + cal.add(Calendar.DAY_OF_YEAR, -1); + isDateChanged = true; + } + //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 + if (oldVal == HOURS_IN_HALF_DAY - 1 && newVal == HOURS_IN_HALF_DAY || + oldVal == HOURS_IN_HALF_DAY && newVal == HOURS_IN_HALF_DAY - 1) { + mIsAm = !mIsAm; + updateAmPmControl(); + }//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 + } else { + if (oldVal == HOURS_IN_ALL_DAY - 1 && newVal == 0) { + cal.setTimeInMillis(mDate.getTimeInMillis()); + cal.add(Calendar.DAY_OF_YEAR, 1); + isDateChanged = true; + //这里是对于24小时制时，中午11点和12点交替时对日期的更改 + } else if (oldVal == 0 && newVal == HOURS_IN_ALL_DAY - 1) { + cal.setTimeInMillis(mDate.getTimeInMillis()); + cal.add(Calendar.DAY_OF_YEAR, -1); + isDateChanged = true; + } + } //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 + 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 + mDate.set(Calendar.HOUR_OF_DAY, newHour); + //通过set函数将新的Hour值传给mDate + 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 + //这里是对Minute改变的监听 + public void onValueChange(NumberPicker picker, int oldVal, int newVal) { + int minValue = mMinuteSpinner.getMinValue(); + int maxValue = mMinuteSpinner.getMaxValue(); + int offset = 0; + //设置offset，作为小时改变的一个记录数据 + if (oldVal == maxValue && newVal == minValue) { + offset += 1; + } else if (oldVal == minValue && newVal == maxValue) { + offset -= 1; + } + //如果原值为59，新值为0，则offset（小时）加1 + //如果原值为0，新值为59，则offset（小时）减1 + if (offset != 0) { + mDate.add(Calendar.HOUR_OF_DAY, offset); + mHourSpinner.setValue(getCurrentHour()); + updateDateControl(); + int newHour = getCurrentHourOfDay(); + if (newHour >= HOURS_IN_HALF_DAY) { + mIsAm = false; + updateAmPmControl(); + } else { + mIsAm = true; + updateAmPmControl(); + } + } + mDate.set(Calendar.MINUTE, newVal); + onDateTimeChanged(); + } + }; + + private NumberPicker.OnValueChangeListener mOnAmPmChangedListener = new NumberPicker.OnValueChangeListener() { + //对AM和PM的监听 + @Override + public void onValueChange(NumberPicker picker, int oldVal, int newVal) { + mIsAm = !mIsAm; + if (mIsAm) { + mDate.add(Calendar.HOUR_OF_DAY, -HOURS_IN_HALF_DAY); + } else { + mDate.add(Calendar.HOUR_OF_DAY, HOURS_IN_HALF_DAY); + } + 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()); + }//通过对数据库的访问，获取当前的系统时间 + + public DateTimePicker(Context context, long date) { + this(context, date, DateFormat.is24HourFormat(context)); + }//上面函数的得到的是1970至今的秒数，该数据很大，需要DateFormat将其变得有意义 + + public DateTimePicker(Context context, long date, boolean is24HourView) { + super(context); + //获取系统时间 + mDate = Calendar.getInstance(); + mInitialising = true; + mIsAm = getCurrentHourOfDay() >= HOURS_IN_HALF_DAY; + inflate(context, R.layout.datetime_picker, this); + //如果当前Activity里用到别的layout，比如对话框layout + //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 + //然后再用findViewById()找到它上面的其它组件 + mDateSpinner = (NumberPicker) findViewById(R.id.date); + mDateSpinner.setMinValue(DATE_SPINNER_MIN_VAL); + mDateSpinner.setMaxValue(DATE_SPINNER_MAX_VAL); + mDateSpinner.setOnValueChangedListener(mOnDateChangedListener); + + mHourSpinner = (NumberPicker) findViewById(R.id.hour); + mHourSpinner.setOnValueChangedListener(mOnHourChangedListener); + mMinuteSpinner = (NumberPicker) findViewById(R.id.minute); + mMinuteSpinner.setMinValue(MINUT_SPINNER_MIN_VAL); + mMinuteSpinner.setMaxValue(MINUT_SPINNER_MAX_VAL); + mMinuteSpinner.setOnLongPressUpdateInterval(100); + mMinuteSpinner.setOnValueChangedListener(mOnMinuteChangedListener); + + String[] stringsForAmPm = new DateFormatSymbols().getAmPmStrings(); + mAmPmSpinner = (NumberPicker) findViewById(R.id.amPm); + mAmPmSpinner.setMinValue(AMPM_SPINNER_MIN_VAL); + mAmPmSpinner.setMaxValue(AMPM_SPINNER_MAX_VAL); + mAmPmSpinner.setDisplayedValues(stringsForAmPm); + mAmPmSpinner.setOnValueChangedListener(mOnAmPmChangedListener); + + // update controls to initial state + updateDateControl(); + updateHourControl(); + updateAmPmControl(); + + set24HourView(is24HourView); + + // set to current time + setCurrentDate(date); + + setEnabled(isEnabled()); + + // set the content descriptions + mInitialising = false; + } + + @Override + public void setEnabled(boolean enabled) { + if (mIsEnabled == enabled) { + return; + } + super.setEnabled(enabled); + mDateSpinner.setEnabled(enabled); + mMinuteSpinner.setEnabled(enabled); + mHourSpinner.setEnabled(enabled); + mAmPmSpinner.setEnabled(enabled); + mIsEnabled = enabled; + } + //下面的函数主要是对上面代码引用到的各函数功能的具体实现 + @Override + public boolean isEnabled() { + return mIsEnabled; + } + + /** + * Get the current date in millis + * + * @return the current date in millis + */ + public long getCurrentDateInTimeMillis() { + return mDate.getTimeInMillis(); + }//实现函数（得到当前的秒数） + + /** + * 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)); + }//实现函数（设置当前的时间，参数是Data） + + /** + * 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); + }//实现函数（设置当前的时间，参数是各详细的变量） + + /** + * Get current year + * + * @return The current year + */ + //下面是得到year、month、day等值 + public int getCurrentYear() { + return mDate.get(Calendar.YEAR); + } + + /** + * Set current year + * + * @param year The current year + */ + public void setCurrentYear(int year) { + if (!mInitialising && year == getCurrentYear()) { + return; + } + mDate.set(Calendar.YEAR, year); + updateDateControl(); + onDateTimeChanged(); + } + + /** + * Get current month in the year + * + * @return The current month in the year + */ + public int getCurrentMonth() { + return mDate.get(Calendar.MONTH); + } + + /** + * 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); + updateDateControl(); + onDateTimeChanged(); + } + + /** + * Get current day of the month + * + * @return The day of the month + */ + public int getCurrentDay() { + 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; + } + 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); + } + + private int getCurrentHour() { + if (mIs24HourView){ + return getCurrentHourOfDay(); + } else { + int hour = getCurrentHourOfDay(); + if (hour > HOURS_IN_HALF_DAY) { + return hour - HOURS_IN_HALF_DAY; + } else { + return hour == 0 ? HOURS_IN_HALF_DAY : hour; + } + } + } + + /** + * Set current hour in 24 hour mode, in the range (0~23) + * + * @param hourOfDay + */ + public void setCurrentHour(int hourOfDay) { + if (!mInitialising && hourOfDay == getCurrentHourOfDay()) { + return; + } + mDate.set(Calendar.HOUR_OF_DAY, hourOfDay); + if (!mIs24HourView) { + if (hourOfDay >= HOURS_IN_HALF_DAY) { + mIsAm = false; + if (hourOfDay > HOURS_IN_HALF_DAY) { + hourOfDay -= HOURS_IN_HALF_DAY; + } + } else { + mIsAm = true; + if (hourOfDay == 0) { + hourOfDay = HOURS_IN_HALF_DAY; + } + } + updateAmPmControl(); + } + mHourSpinner.setValue(hourOfDay); + 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); + mDate.set(Calendar.MINUTE, minute); + onDateTimeChanged(); + } + + /** + * @return true if this is in 24 hour view else false. + */ + 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; + } + mIs24HourView = is24HourView; + mAmPmSpinner.setVisibility(is24HourView ? View.GONE : View.VISIBLE); + int hour = getCurrentHourOfDay(); + updateHourControl(); + setCurrentHour(hour); + updateAmPmControl(); + } + + private void updateDateControl() { + Calendar cal = Calendar.getInstance(); + cal.setTimeInMillis(mDate.getTimeInMillis()); + cal.add(Calendar.DAY_OF_YEAR, -DAYS_IN_ALL_WEEK / 2 - 1); + mDateSpinner.setDisplayedValues(null); + for (int i = 0; i < DAYS_IN_ALL_WEEK; ++i) { + cal.add(Calendar.DAY_OF_YEAR, 1); + mDateDisplayValues[i] = (String) DateFormat.format("MM.dd EEEE", cal); + } + mDateSpinner.setDisplayedValues(mDateDisplayValues); + mDateSpinner.setValue(DAYS_IN_ALL_WEEK / 2); + mDateSpinner.invalidate(); + }// 对于星期几的算法 + + private void updateAmPmControl() { + if (mIs24HourView) { + mAmPmSpinner.setVisibility(View.GONE); + } else { + 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() { + if (mIs24HourView) { + mHourSpinner.setMinValue(HOUR_SPINNER_MIN_VAL_24_HOUR_VIEW); + mHourSpinner.setMaxValue(HOUR_SPINNER_MAX_VAL_24_HOUR_VIEW); + } 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 + */ + public void setOnDateTimeChangedListener(OnDateTimeChangedListener callback) { + mOnDateTimeChangedListener = callback; + } + + private void onDateTimeChanged() { + if (mOnDateTimeChangedListener != null) { + mOnDateTimeChangedListener.onDateTimeChanged(this, getCurrentYear(), + getCurrentMonth(), getCurrentDay(), getCurrentHourOfDay(), getCurrentMinute()); + } + } +} + + + + + +DateTimePickerDialog.java + + + + +package net.micode.notes.ui; + +import java.util.Calendar; + +import net.micode.notes.R; +import net.micode.notes.ui.DateTimePicker; +import net.micode.notes.ui.DateTimePicker.OnDateTimeChangedListener; + +import android.app.AlertDialog; +import android.content.Context; +import android.content.DialogInterface; +import android.content.DialogInterface.OnClickListener; +import android.text.format.DateFormat; +import android.text.format.DateUtils; + +public class DateTimePickerDialog extends AlertDialog implements OnClickListener { + + private Calendar mDate = Calendar.getInstance(); + //创建一个Calendar类型的变量 mDate，方便时间的操作 + private boolean mIs24HourView; + private OnDateTimeSetListener mOnDateTimeSetListener; + //声明一个时间日期滚动选择控件 mOnDateTimeSetListener + private DateTimePicker mDateTimePicker; + //DateTimePicker控件，控件一般用于让用户可以从日期列表中选择单个值。 + //运行时，单击控件边上的下拉箭头，会显示为两个部分：一个下拉列表，一个用于选择日期的 + + public interface OnDateTimeSetListener { + void OnDateTimeSet(AlertDialog dialog, long date); + } + + public DateTimePickerDialog(Context context, long date) { + //对该界面对话框的实例化 + super(context); + //对数据库的操作 + mDateTimePicker = new DateTimePicker(context); + setView(mDateTimePicker); + //添加一个子视图 + mDateTimePicker.setOnDateTimeChangedListener(new OnDateTimeChangedListener() { + public void onDateTimeChanged(DateTimePicker view, int year, int month, + int dayOfMonth, int hourOfDay, int minute) { + mDate.set(Calendar.YEAR, year); + mDate.set(Calendar.MONTH, month); + mDate.set(Calendar.DAY_OF_MONTH, dayOfMonth); + mDate.set(Calendar.HOUR_OF_DAY, hourOfDay); + mDate.set(Calendar.MINUTE, minute); + //将视图中的各选项设置为系统当前时间 + updateTitle(mDate.getTimeInMillis()); + } + }); + mDate.setTimeInMillis(date); + //得到系统时间 + mDate.set(Calendar.SECOND, 0); + //将秒数设置为0 + mDateTimePicker.setCurrentDate(mDate.getTimeInMillis()); + setButton(context.getString(R.string.datetime_dialog_ok), this); + setButton2(context.getString(R.string.datetime_dialog_cancel), (OnClickListener)null); + //设置按钮 + set24HourView(DateFormat.is24HourFormat(this.getContext())); + //时间标准化打印 + updateTitle(mDate.getTimeInMillis()); + } + + public void set24HourView(boolean is24HourView) { + mIs24HourView = is24HourView; + } + + public void setOnDateTimeSetListener(OnDateTimeSetListener callBack) { + mOnDateTimeSetListener = callBack; + }//将时间日期滚动选择控件实例化 + + private void updateTitle(long date) { + int flag = + DateUtils.FORMAT_SHOW_YEAR | + DateUtils.FORMAT_SHOW_DATE | + DateUtils.FORMAT_SHOW_TIME; + flag |= mIs24HourView ? DateUtils.FORMAT_24HOUR : DateUtils.FORMAT_24HOUR; + setTitle(DateUtils.formatDateTime(this.getContext(), date, flag)); + }//android开发中常见日期管理工具类（API）——DateUtils：按照上下午显示时间 + + public void onClick(DialogInterface arg0, int arg1) { + if (mOnDateTimeSetListener != null) { + mOnDateTimeSetListener.OnDateTimeSet(this, mDate.getTimeInMillis()); + } + }//第一个参数arg0是接收到点击事件的对话框 + //第二个参数arg1是该对话框上的按钮 + +} + + + + + +DropdownMenu.java + + + + +package net.micode.notes.ui; + +import android.content.Context; +import android.view.Menu; +import android.view.MenuItem; +import android.view.View; +import android.view.View.OnClickListener; +import android.widget.Button; +import android.widget.PopupMenu; +import android.widget.PopupMenu.OnMenuItemClickListener; + +import net.micode.notes.R; + +public class DropdownMenu { + private Button mButton; + private PopupMenu mPopupMenu; + //声明一个下拉菜单 + private Menu mMenu; + + public DropdownMenu(Context context, Button button, int menuId) { + mButton = button; + mButton.setBackgroundResource(R.drawable.dropdown_icon); + //设置这个view的背景 + mPopupMenu = new PopupMenu(context, mButton); + mMenu = mPopupMenu.getMenu(); + mPopupMenu.getMenuInflater().inflate(menuId, mMenu); + //MenuInflater是用来实例化Menu目录下的Menu布局文件 + //根据ID来确认menu的内容选项 + mButton.setOnClickListener(new OnClickListener() { + public void onClick(View v) { + mPopupMenu.show(); + } + }); + } + + public void setOnDropdownMenuItemClickListener(OnMenuItemClickListener listener) { + if (mPopupMenu != null) { + mPopupMenu.setOnMenuItemClickListener(listener); + }//设置菜单的监听 + } + + public MenuItem findItem(int id) { + return mMenu.findItem(id); + }//对于菜单选项的初始化，根据索引搜索菜单需要的选项 + + public void setTitle(CharSequence title) { + mButton.setText(title); + }//布局文件，设置标题 +} + + + + +FoldersListAdapter.java + + + + +package net.micode.notes.ui; + +import android.content.Context; +import android.database.Cursor; +import android.view.View; +import android.view.ViewGroup; +import android.widget.CursorAdapter; +import android.widget.LinearLayout; +import android.widget.TextView; + +import net.micode.notes.R; +import net.micode.notes.data.Notes; +import net.micode.notes.data.Notes.NoteColumns; + + +public class FoldersListAdapter extends CursorAdapter { + //CursorAdapter是Cursor和ListView的接口 + //FoldersListAdapter继承了CursorAdapter的类 + //主要作用是便签数据库和用户的交互 + //这里就是用folder（文件夹）的形式展现给用户 + public static final String [] PROJECTION = { + NoteColumns.ID, + NoteColumns.SNIPPET + };//调用数据库中便签的ID和片段 + + public static final int ID_COLUMN = 0; + public static final int NAME_COLUMN = 1; + + public FoldersListAdapter(Context context, Cursor c) { + super(context, c); + // TODO Auto-generated constructor stub + }//数据库操作 + + @Override + public View newView(Context context, Cursor cursor, ViewGroup parent) { + //ViewGroup是容器 + return new FolderListItem(context); + }//创建一个文件夹，对于各文件夹中子标签的初始化 + + @Override + public void bindView(View view, Context context, Cursor cursor) { + if (view instanceof FolderListItem) { + String folderName = (cursor.getLong(ID_COLUMN) == Notes.ID_ROOT_FOLDER) ? context + .getString(R.string.menu_move_parent_folder) : cursor.getString(NAME_COLUMN); + ((FolderListItem) view).bind(folderName); + } + }//将各个布局文件绑定起来 + + public String getFolderName(Context context, int position) { + Cursor cursor = (Cursor) getItem(position); + return (cursor.getLong(ID_COLUMN) == Notes.ID_ROOT_FOLDER) ? context + .getString(R.string.menu_move_parent_folder) : cursor.getString(NAME_COLUMN); + }//根据数据库中标签的ID得到标签的各项内容 + + private class FolderListItem extends LinearLayout { + private TextView mName; + + public FolderListItem(Context context) { + super(context); + //操作数据库 + inflate(context, R.layout.folder_list_item, this); + //根据布局文件的名字等信息将其找出来 + mName = (TextView) findViewById(R.id.tv_folder_name); + } + + public void bind(String name) { + mName.setText(name); + } + } + +} + +