Android原生模块DeskClock分析1(3)

//当系统进入睡眠状态时，这种类型的闹铃不会唤醒系统。直到系统下次被唤醒才传递它，该闹铃所用的时间是绝对时间，所用时间是UTC时间，可以通过调用 System.currentTimeMillis()获得。系统值是1 (0x00000001) 。

public static final int RTC_WAKEUP

//能唤醒系统，用法同RTC类型，系统值为 0 (0x00000000) 。

Public static final int POWER_OFF_WAKEUP

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DeskClock分析文档

//能唤醒系统，它是一种关机闹铃，就是说设备在关机状态下也可以唤醒系统，所以我们把它称之为关机闹铃。使用方法同RTC类型，系统值为4(0x00000004)。

? AlarmKlaxon通过继承Service，来实现功能，他在后台运行。

? 闹铃模式：Vibrator（震动）VIBRATOR_SERVICE，TelephonyManager（响铃）

TELEPHONY_SERVICE private void play(Alarm alarm) {

// stop() checks to see if we are already playing. stop();

if (Log.LOGV) {

Log.v(\ }

if (!alarm.silent) {Log.e(\ Uri alert = alarm.alert;

// Fall back on the default alarm if the database does not have an // alarm stored.

if (alert == null) {Log.e(\ alert = RingtoneManager.getDefaultUri( RingtoneManager.TYPE_ALARM); if (Log.LOGV) {Log.e(\

Log.v(\ } }

// TODO: Reuse mMediaPlayer instead of creating a new one and/or use // RingtoneManager.

mMediaPlayer = new MediaPlayer();

mMediaPlayer.setOnErrorListener(new OnErrorListener() { public boolean onError(MediaPlayer mp, int what, int extra) { Log.e(\ mp.stop(); mp.release(); mMediaPlayer = null; Log.e(\ return true; } });

try {

// Check if we are in a call. If we are, use the in-call alarm // resource at a low volume to not disrupt the call.

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DeskClock分析文档

if (mTelephonyManager.getCallState()

!= TelephonyManager.CALL_STATE_IDLE) {Log.e(\ Log.v(\

mMediaPlayer.setVolume(IN_CALL_VOLUME, IN_CALL_VOLUME); setDataSourceFromResource(getResources(), mMediaPlayer, R.raw.in_call_alarm); } else {Log.e(\

mMediaPlayer.setDataSource(this, alert); }

startAlarm(mMediaPlayer); } catch (Exception ex) {

Log.v(\

// The alert may be on the sd card which could be busy right // now. Use the fallback ringtone. try {

// Must reset the media player to clear the error state. mMediaPlayer.reset();

setDataSourceFromResource(getResources(), mMediaPlayer, R.raw.fallbackring); startAlarm(mMediaPlayer); } catch (Exception ex2) {

// At this point we just don't play anything. Log.e(\ } } }

/* Start the vibrator after everything is ok with the media player */ if (alarm.vibrate) {Log.e(\ mVibrator.vibrate(sVibratePattern, 0); } else {Log.e(\ mVibrator.cancel(); }

enableKiller(alarm); mPlaying = true;

mStartTime = System.currentTimeMillis();

}

? AlarmClock继承Activity实现OnItemClickListener接口

· AlarmClock是一个Activity类，主要功能是将闹钟界面显示出来，并通过各种组件控件，

实现人机交互功能，其中包括listView，adapter，menu，cursor等组件。

· 这里定义一个AlarmTimeAdapter继承CursorAdapter，用来显示闹钟列表的适配器。这里

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