我目前正在开发一个使用Android的AlarmManager的应用程序。我正在尝试向AlarmManager添加一个新的警报,但经过几个小时的尝试各种事情并检查SO上的各种线程,我仍然在一堵砖墙。我的代码有问题吗?
主要活动 - saveAlarm()函数
/**
* Saves the current alarm. Adds to the database if it doesn't already exist, or updates if it does.
* Also sets alert with AlarmManager.
*/
public void saveAlarm() {
// Create Database instance
DbHandler db = new DbHandler(getApplicationContext());
if(alarm.getId() == -1) {
// Saving a new alarm
db.open();
alarm.setId(db.addAlarm(alarm));
db.close();
}
else {
db.open();
db.updateAlarm(alarm);
db.close();
}
// Create the wakeup intent
Intent intent = new Intent(this, AlarmReceiver.class);
intent.putExtra("alarm_id", alarm.getId());
// Create the Pending Intent
PendingIntent sender = PendingIntent.getBroadcast(this, AlarmPlayer.REQUEST_ALARM + alarm.getId(), intent, PendingIntent.FLAG_UPDATE_CURRENT);
// Debug
Calendar now = Calendar.getInstance();
long dTime = alarm.getNextAlarmTime().getTimeInMillis() - now.getTimeInMillis();
Log.d(TAG, "Setting alarm for " + (dTime / 1000) + " seconds time");
// Add to Android Alarm Manager
AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
am.set(AlarmManager.RTC_WAKEUP, alarm.getNextAlarmTime().getTimeInMillis(), sender);
}
我已经确认正确的时间传递到 am.set (请参阅上面的调试部分)。
AlarmReceiver.class
/**
* This class listens out for broadcasts from AlarmManager
* and launches the AlarmPlayer activity accordingly.
* @author Michael
*
*/
public class AlarmReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context c, Intent intent) {
Log.d("RSS Alarm", "Waking up alarm");
// Launch the AlarmPlayer activity
Intent i = new Intent(c, AlarmPlayer.class);
i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
c.startActivity(i);
}
}
我还在AndroidManifest.xml中设置了<receiver android:process=":remote" android:name="AlarmReceiver" />
。我不知道是什么导致了这个问题,但它仍在发生。非常感谢任何帮助,非常感谢提前。
修改1 将时区更改为UTC似乎无法解决任何问题,我的日历似乎默认为UTC。目前的代码:
// Debug
Calendar now = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
long dTime = alarm.getNextAlarmTime().getTimeInMillis() - now.getTimeInMillis();
Log.d(TAG, "Setting alarm for " + (dTime / 1000) + " seconds time");
// Add to Android Alarm Manager
AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
Log.d(TAG, "Timezone offset is " + TimeZone.getDefault().getRawOffset());
Log.d(TAG, "UTC time is currently " + Calendar.getInstance(TimeZone.getTimeZone("UTC")).getTimeInMillis() / 1000);
am.set(AlarmManager.RTC_WAKEUP, (alarm.getNextAlarmTime().getTimeInMillis() - TimeZone.getDefault().getRawOffset()), sender);
答案 0 :(得分:0)
这可能是AlarmManager.set(AlarmManager.RTC_WAKEUP, ...)
需要UTC时间的情况吗?如果您设置“本地时间”并且未调整为UTC,则会导致问题。简而言之,警报可能正在被正确添加,但除非您的时区是UTC,否则它不会在您预期时触发。
来自文档...
public static final int RTC_WAKEUP自:API Level 1
System.currentTimeMillis()中的闹钟时间(以UTC为单位的挂钟时间),它将在设备关闭时唤醒设备。
答案 1 :(得分:0)
在你的清单中,我相信你需要android:name“.AlarmReceiver”注意点。 如果不这样做,请发布清单文件。另外,你的logcat是否提到添加警报和警报触发?
编辑:您可以试试这个 AlarmManager am =(AlarmManager)getSystemService(Context.ALARM_SERVICE);
除此之外,我没有看到任何对我跳出来的事情。祝你好运