private void startAlarm() {
AlarmManager alarmMgr;
PendingIntent alarmIntent;
alarmMgr = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(MainActivity.this, AlarmReceiver.class);
alarmIntent = PendingIntent.getBroadcast(MainActivity.this, 0, intent, 0);
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.HOUR_OF_DAY, 23);
calendar.set(Calendar.MINUTE, 52);
alarmMgr.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
1000 * 60 * 20, alarmIntent);
}
startAlarm() method is in the MainActivity class.
The following code should display a toast (declared in onReceive() method of the AlarmReceiver class) at 23:52 and every 20 minutes thereafter
AlarmReceiver extends BroadcastReceiver.
The code compiles without errors but for some reason it is not displaying the toast.
NOTE : The code worked fine with ELAPSED_REALTIME_WAKEUP. I am having problem with RTC_WAKEUP only. So everything else has to be correct. There is something wrong inside the startAlarm() method only.
I have tried your code with some modification as below .
private void startAlarm() {
AlarmManager alarmMgr;
PendingIntent alarmIntent;
alarmMgr = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(MainActivity.this, AlarmReceiver.class);
alarmIntent = PendingIntent.getBroadcast(MainActivity.this, 0, intent, 0);
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 2);
alarmMgr.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
1000 * 20, alarmIntent);
}
This code works fine with AlarmManager.RTC_WAKEUP. If it does not work for you, please reboot your device after installing it. After reboot completed, start your app. Then it should fire the alarm and every 20 sec interval the alarm fires repeatedly.
You can also check the difference between RTC_WAKEUP and ELAPSED_REALTIME_WAKEUP. From android docs, elapsedRealtime means, Returns milliseconds since boot, including time spent in sleep and RTC means, time in System.currentTimeMillis() (wall clock time in UTC).
Looks like You need to set an action to the intent:
Intent intent = new Intent(MainActivity.this, AlarmReceiver.class);
intent.setAction("YourPackageName.YourAction");
alarmIntent = PendingIntent.getBroadcast(MainActivity.this, 0, intent, 0);
And in the manifest:
<receiver android:name=".AlarmReciever">
<intent-filter>
<action android:name="YourPackageName.YourAction" />
</intent-filter>
</receiver>
This should fix the issue. You must have a unique action in the intent for use it with broadcast receiver.
Related
I am trying to create two alarms, one that starts my service at 7:00 p.m every day, and one that stop it at 5:00 a.m. every day. I have tested my alarm over and over and it seems interval_day does not seem to work. If I replace AlarmManager.INTERVAL_DAY with 60*1000 the alarm goes off, but with AlarmManager.INTERVAL_DAY it does not go off. I have the other alarm which uses the same code and AlarmManager.INTERVAL_DAY works with it. Any idea why that one works and the other one doesn't? How would I fix this?
EDIT: It turns out that both alarms are not working at the same time, either one or the other turns on or none at all. Is there something wrong with my code for having two alarms? Can I have only one alarm at a time? Changing the interval to 60 seconds seems to make that alarm go off 100%, but otherwise it seems they go off only 30% of the time and never both. I have no clue what might be causing this.
//code that does not go off and doesnt work
public void setAlarm(){
AlarmManager alarmMgr = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(this, DrawOverAppsService.class);
Float alpha2 = alpha.getProgress()/100f;
intent.putExtra("alpha", alpha2);
PendingIntent alarmIntent = PendingIntent.getService(MainActivity.this, 0, intent, 0);
if(start.isChecked()) {
alarmMgr.cancel(alarmIntent);
java.util.Calendar calendar = java.util.Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(java.util.Calendar.HOUR_OF_DAY, 19);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
alarmMgr.setRepeating(AlarmManager.RTC_WAKEUP,
calendar.getTimeInMillis(),
AlarmManager.INTERVAL_DAY, alarmIntent);
Log.d("a","b");
}
if(start.isChecked() == false) {
alarmMgr.cancel(alarmIntent);
}
}
//code that goes off and works
public void stopAlarm(){
AlarmManager alarmMgr = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(this, stopOverlay.class);
PendingIntent alarmIntent = PendingIntent.getService(MainActivity.this, 0, intent, 0);
if(stop.isChecked()) {
alarmMgr.cancel(alarmIntent);
java.util.Calendar calendar = java.util.Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(java.util.Calendar.HOUR_OF_DAY, 5);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
alarmMgr.setRepeating(AlarmManager.RTC_WAKEUP,
calendar.getTimeInMillis(),
AlarmManager.INTERVAL_DAY, alarmIntent);
}
if(stop.isChecked() == false) {
alarmMgr.cancel(alarmIntent);
}
}
I want use String start = "16:00"; in specific time, start another activity.
I must use String start = "16:00"
MainActivity.class
String start = "16:00";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setAlarmTime(this);
}
private void setAlarmTime(Context context) {
String[] strStart = start.split(":") // delete ":"
Calendar cal_start = Calendar.getInstance();
cal_start.set(Calendar.HOUR_OF_DAY, Integer.parseInt(strStart[0])); // hour
cal_start.set(Calendar.MINUTE, Integer.parseInt(strStart[1])); //minute
AlarmManager alarm = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(this, AlarmActivity.class);
PendingIntent pIntent = PendingIntent.getActivity(context, 0, intent, 0);
alarm.set(AlarmManager.RTC, cal_start.getTimeInMillis(), pIntent);
}
I want while the app is running, current time 4 o'clock , start AlarmActivity.class .
But it does not work.
How to every specific time start another activity on android?
#update
private void setAlarmTime(Context context) {
String[] strStart = start.split(":");
Calendar cal_start = Calendar.getInstance();
cal_start.set(Calendar.HOUR_OF_DAY, Integer.parseInt(strStart[0]));
cal_start.set(Calendar.MINUTE, Integer.parseInt(strStart[1]));
AlarmManager alarm = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(this, AlarmReceiver.class);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, 0);
alarm.set(AlarmManager.RTC_WAKEUP, cal_start.getTimeInMillis(), pendingIntent);
this source not work.
not work alarmManager.
Please consider to use AlarmManager.RTC_WAKEUP if you need to wake up the device even if it goes off.
alarm.set(AlarmManager.RTC_WAKEUP, cal_start.getTimeInMillis(), pIntent);
AlarmManager.RTC will NOT wake the device up.
Reference: https://developer.android.com/reference/android/app/AlarmManager.html#RTC
Btw, you do not need to pass the context reference to method:
PendingIntent pIntent = PendingIntent.getActivity(this /*can use this as it is a context already */ , 0, intent, 0);
Update:
Please also set the second and millisecond of the cal_start; otherwise it will be the values that you get the calendar instance.
cal_start.set(Calendar.SECOND, 0);
cal_start.set(Calendar.MILLISECOND, 0);
Update 2:
It works in my side, you may try to add
<uses-permission android:name="android.permission.WAKE_LOCK" />
in Manifests.
Btw, if you want this alarm repeat every day
AlarmManager alarm = (AlarmManager) getSystemService(ALARM_SERVICE);
alarm.setRepeating(AlarmManager.RTC_WAKEUP, cal_start.getTimeInMillis(), AlarmManager.INTERVAL_DAY, pIntent);
Add this permission in your manifest
<uses-permission android:name="android.permission.WAKE_LOCK" />
register your receiver class in the application tag in the manifest file
<receiver android:name=".AlarmActivity" />
Resister your alarm that will trigger AlarmActivity at a specific time in your case its 16:00
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, 16);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
Intent intent = new Intent(getApplicationContext(), AlarmActivity.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 100, intent, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY, pendingIntent);
Make sure your register class extend BroadcastReceiver like this
class AlarmActivity extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
// Do whatever you want
// you can generate notifications here
// or can start your application activity you want
}
}
In my app, I need to start a service at 2:00pm daily. Right now I wrote the code to trigger the alarm once, this code is ran every time I open the app:
AlarmManager alarmMgr = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(this, DownloadReceiver.class);
PendingIntent pIntent = PendingIntent.getBroadcast(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
alarmMgr.cancel(pIntent);
Calendar cal= Calendar.getInstance();
cal.setTimeInMillis(System.currentTimeMillis());
cal.set(Calendar.HOUR_OF_DAY,refreshhour);
cal.set(Calendar.MINUTE,refreshmin);
cal.set(Calendar.SECOND, 0);
// if the scheduler date is passed, move scheduler time to tomorrow
if (System.currentTimeMillis() > cal.getTimeInMillis()) {
cal.add(Calendar.DAY_OF_YEAR, 1);
}
if(android.os.Build.VERSION.SDK_INT>=23) {
alarmMgr.setAndAllowWhileIdle(AlarmManager.RTC_WAKEUP,
cal.getTimeInMillis(), pIntent);
}
else{
alarmMgr.setInexactRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(),
AlarmManager.INTERVAL_DAY, pIntent);
}
Q1. I used setAndAllowWhileIdle() for sdk above 23 in case the device is in Doze mode. I cannot find any option in this function that I can set the alarm to repeat every day.
Q2. I also have questions about setInexactRepeating() , normally it is set to repeat every day by setting the parameter INTERVAL_DAY , but in the docs, it says
As of API 19, all repeating alarms will be inexact and subject to
batching with other alarms regardless of their stated repeat interval.
Does this mean INTERVAL_DAY does not work anymore, so how can I set the alarm daily without rerunning this function and reset alarmManager?
Try below code will solve your problem-
AlarmManager alarmMgr = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
boolean flag = (PendingIntent.getBroadcast(this, 0,
new Intent("totime.action.string"),
PendingIntent.FLAG_NO_CREATE) != null);
if(!flag)
{
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, 14);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
Intent intent = new Intent("totime.action.string");
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarmManager = (AlarmManager) Data_Graph.this.getSystemService(Context.ALARM_SERVICE);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),(24*60*60*1000), pendingIntent);
}
I have an AlarmService that is initialized when the devicve boots, starts at 6 am, ends at 6 pm and repeats hourly.
How do I make sure that it starts again after I cancel it at 6 pm?
This is my BootReceiver:
if (intent.getAction().equals("android.intent.action.BOOT_COMPLETED")) {
// assign RefreshService class
Intent alarmIntent = new Intent(context, RefreshService.class);
PendingIntent alarmPendingIntent = PendingIntent.getBroadcast(context, alarmManagerRequestCode, alarmIntent, 0);
// set the alarm
// it starts at 6 am and repeats once an hour
// elapsed_realtime is used to save ressources
AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
alarmManager.setInexactRepeating(AlarmManager.ELAPSED_REALTIME, firstRefresh,
AlarmManager.INTERVAL_HOUR,
alarmPendingIntent);
}
So it is initialized when the device boots and starts at 6 am (firstRefresh) and repeats hourly.
To have it stop I would put the following into my RefreshService(lastRefresh is 6 pm in milliseconds):
if (System.currentTimeMillis() >= lastRefresh) {
Intent alarmIntent = new Intent(this, RefreshService.class);
PendingIntent alarmPendingIntent = PendingIntent.getBroadcast(this, BootReceiver.alarmManagerRequestCode, alarmIntent, 0);
AlarmManager alarmManager = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE);
alarmManager.cancel(alarmPendingIntent);
}
Appreciate y'alls help!
Thanks #Opiatefuchs for pointing that out:
The only thing you have to do is setting the alarm after cancelling it and setting the first time it's fired to needed time the next day.
Use calender, AlarmManager and pendingIntent for this-
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, 5); // For 5 AM or 6 AM
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
PendingIntent pi = PendingIntent.getService(context, 0,
new Intent(context, NewClass.class),PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager am = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
am.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
AlarmManager.INTERVAL_DAY, pi);
Use setRepeating:
here is the nice example:
https://stackoverflow.com/a/13879448/4617458
I am trying to set periodically alarm every 30 minutes, but i dont think it is working. I use below code:
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(MyActivity.this, Alarm.class);
PendingIntent alarmIntent = PendingIntent.getBroadcast(MyActivity.this, 0, intent, 0);
long selectedTimeMiliseconds = (long) (TimeUnit.MINUTES.toMillis(30));
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), selectedTimeMiliseconds, alarmIntent);
How to set the second parameter in method setInexactRepeating? Is it better to use setRepeating method?
Inexact is a save battery method, but it is... inexact.
AlarmManager have a problem, if the device is in sleep mode, the intent not start. You should use WakefulBroadCast.
https://developer.android.com/reference/android/support/v4/content/WakefulBroadcastReceiver.html
Try this..
alarmManager.setRepeating(AlarmManager.RTC, calendar.getTimeInMillis(), selectedTimeMiliseconds, alarmIntent);