DeskClock分析文档
Object newValue) { String val = (String) newValue;
// Set the summary based on the new label. p.setSummary(val);
if (val != null && !val.equals(mLabel.getText())) { Log.e(\
// Call through to the generic listener. return SetAlarm.this.onPreferenceChange(p, newValue); }
return true; } });
mEnabledPref = (CheckBoxPreference) findPreference(\
//为EnabledPref设置监听
mEnabledPref.setOnPreferenceChangeListener(
new Preference.OnPreferenceChangeListener() { public boolean onPreferenceChange(Preference p, Object newValue) {Log.e(\ // Pop a toast when enabling alarms.
if (!mEnabledPref.isChecked()) {Log.e(\ popAlarmSetToast(SetAlarm.this, mHour, mMinutes, mRepeatPref.getDaysOfWeek()); }
return SetAlarm.this.onPreferenceChange(p, newValue); } });
//为mAlarmPref、mVibratePref、mRepeatPref设置监听
mTimePref = findPreference(\
mAlarmPref = (AlarmPreference) findPreference(\ mAlarmPref.setOnPreferenceChangeListener(this);
mVibratePref = (CheckBoxPreference) findPreference(\ mVibratePref.setOnPreferenceChangeListener(this);
mRepeatPref = (RepeatPreference) findPreference(\ mRepeatPref.setOnPreferenceChangeListener(this);
//定义Intent，来获取值
Intent i = getIntent();
mId = i.getIntExtra(Alarms.ALARM_ID, -1); if (Log.LOGV) {
Log.v(\ }
Alarm alarm = null;
if (mId == -1) {Log.e(\
21
DeskClock分析文档
// No alarm id means create a new alarm. alarm = new Alarm(); } else {Log.e(\
/* load alarm details from database */
alarm = Alarms.getAlarm(getContentResolver(), mId); // Bad alarm, bail to avoid a NPE. if (alarm == null) {Log.e(\ finish(); return; } }
mOriginalAlarm = alarm;
updatePrefs(mOriginalAlarm);
// We have to do this to get the save/cancel buttons to highlight on // their own.
getListView().setItemsCanFocus(true);
//为save设置监听
Button b = (Button) findViewById(R.id.alarm_save); b.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { Log.e(\ saveAlarm(); finish(); } });
//为revert设置监听
final Button revert = (Button) findViewById(R.id.alarm_revert); revert.setEnabled(false);
revert.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { Log.e(\ int newId = mId;
updatePrefs(mOriginalAlarm);
// \ if (mOriginalAlarm.id == -1) { Log.e(\
Alarms.deleteAlarm(SetAlarm.this, newId); } else {Log.e(\ saveAlarm(); }
revert.setEnabled(false);
22
DeskClock分析文档
} });
//为delete设置监听
b = (Button) findViewById(R.id.alarm_delete); if (mId == -1) {Log.e(\ b.setEnabled(false); } else {Log.e(\
b.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { Log.e(\ deleteAlarm(); } }); }
// The last thing we do is pop the time picker if this is a new alarm. if (mId == -1) {Log.e(\ // Assume the user hit cancel mTimePickerCancelled = true; showTimePicker(); } }
? updatePrefs方法用来更新获取的值
private void updatePrefs(Alarm alarm) {Log.e(\ mId = alarm.id;
mEnabledPref.setChecked(alarm.enabled); mLabel.setText(alarm.label); mLabel.setSummary(alarm.label); mHour = alarm.hour; mMinutes = alarm.minutes;
mRepeatPref.setDaysOfWeek(alarm.daysOfWeek); mVibratePref.setChecked(alarm.vibrate); // Give the alert uri to the preference. mAlarmPref.setAlert(alarm.alert); updateTime(); }
? onBackPressed方法，设置闹铃后，退出并保存 @Override
public void onBackPressed() {
if (!mTimePickerCancelled) {Log.e(\
23
DeskClock分析文档
saveAlarm(); } finish(); }
? 通过onPreferenceTreeClick方法设置时间
@Override
public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen,
Preference preference) {Log.e(\ if (preference == mTimePref) {Log.e(\ showTimePicker(); }
return super.onPreferenceTreeClick(preferenceScreen, preference); }
· showTimePicker方法，定义new TimePickerDialog，设置时间 private void showTimePicker() {Log.e(\ new TimePickerDialog(this, this, mHour, mMinutes, DateFormat.is24HourFormat(this)).show(); }
· onTimeSet方法，更新时间设置
public void onTimeSet(TimePicker view, int hourOfDay, int minute) { Log.e(\
mTimePickerCancelled = false; mHour = hourOfDay; mMinutes = minute; updateTime();
// If the time has been changed, enable the alarm. mEnabledPref.setChecked(true); // Save the alarm and pop a toast.
popAlarmSetToast(this, saveAlarmAndEnableRevert());
}
? 调用在AlarmKlaxon类中定义的mVibrator @Override
public void onCreate() { mVibrator = (Vibrator)
getSystemService(Context.VIBRATOR_SERVICE);
// Listen for incoming calls to kill the alarm. mTelephonyManager = (TelephonyManager)
24
DeskClock分析文档
getSystemService(Context.TELEPHONY_SERVICE); //通话
mTelephonyManager.listen( mPhoneStateListener, PhoneStateListener.LISTEN_CALL_STATE);
AlarmAlertWakeLock.acquireCpuWakeLock(this); Log.e(\ }
? 铃声: private AlarmPreference mAlarmPref;
通过AlarmPreference类继承RingtonePreference类。
RingtonePreference 专门处理铃声。可以在应用程序中使用它为用户提供一个选项，以便选择某个铃声作为首选项。
? 设置闹铃重复: private RepeatPreference mRepeatPref;
通过RepeatPreference类继承ListPreference类。
ListPreference相当于windows的下拉列表框，提供用户可选项和默认选项。 通过重写onPrepareDialogBuilder方法创建一个下拉列表
@Override
protected void onPrepareDialogBuilder(Builder builder) { Log.e(\
CharSequence[] entries = getEntries();
CharSequence[] entryValues = getEntryValues();
builder.setMultiChoiceItems(
entries, mDaysOfWeek.getBooleanArray(),
new DialogInterface.OnMultiChoiceClickListener() {
//监听选中项
public void onClick(DialogInterface dialog, int which, boolean isChecked) {Log.e(\ mNewDaysOfWeek.set(which, isChecked); } });
}
通过重写onDialogClosed方法和getDaysOfWeek方法，来获取更新后的值。
? deleteAlarm方法，在设置界面，删除闹铃 private void deleteAlarm() {Log.e(\ new AlertDialog.Builder(this)
.setTitle(getString(R.string.delete_alarm))
.setMessage(getString(R.string.delete_alarm_confirm)) .setPositiveButton(android.R.string.ok,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface d, int w) {
25