I have a service that runs in background. I am using alarm manager to start this service. It works fine but when i change the system clock in my device or in the simulator the alarm manager stops.
public void startAzanService() {
Calendar cal = Calendar.getInstance();
Intent intent = new Intent(this, CheckAzan.class);
PendingIntent pintent = PendingIntent.getService(this, 0, intent, 0);
AlarmManager alarm = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
//repeat the action every 5 secionde
alarm.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), 5000, pintent);
}
You can overcome this problem by Listening to the time changing Broadcast. Do the following:-
1)Create BroadcastReceiver in you Manifest file:-
<receiver android:name=".TimeChangeReceiver">
<intent-filter >
<action android:name="android.intent.action.TIME_SET"/>
</intent-filter>
</receiver>
2)Create the receiver class:-
public class TimeChangeReceiver extends BroadcastReceiver{
#Override
public void onReceive(final Context arg0, Intent arg1) {
//Call your Alarm setting code
Calendar cal = Calendar.getInstance();
Intent intent = new Intent(this, CheckAzan.class);
PendingIntent pintent = PendingIntent.getService(this, 0, intent, 0);
AlarmManager alarm = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
//repeat the action every 5 secionde
alarm.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), 5000, pintent);
}
}
*Assuming that your don`t have any problem with your code :)
This link is also a good Tutorial of the BroadcastReceiver
Related
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
}
}
I set alarm manager for time control.My purpose continue to time controlling on screen off. While screen is on everything is ok but when i locked to device(screen of) my broadcast receiver not receiver anything
i tried lots of different solution (in Manifest export:false or process:":remote") about similar problem but problem not solved. I need to help. I hope someone solved that problem before.
For set alarm manager
AlarmManager alarmManager = (AlarmManager)
context.getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(context, TimeService.class);
intent.setAction(SETUP_TIMER_FOR_NOTIFICATION);
PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 112, intent, PendingIntent.FLAG_UPDATE_CURRENT);
long now = System.currentTimeMillis();
long minute = 1000 * 60;
alarmManager.cancel(pendingIntent);
alarmManager.setInexactRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, SystemClock.elapsedRealtime() , minute, pendingIntent);
My Receiver
public class TimeService extends WakefulBroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
Log.i("TimeService", "onReceive");
Intent timeIntent = new Intent(context, NotificationService.class);
timeIntent.setAction(SETUP_TIMER_FOR_NOTIFICATION);
startWakefulService(context, timeIntent);
}
}
Manifest.xml
<receiver
android:name="service.TimeService"
android:enabled="true"
android:exported="false"
>
<intent-filter>
<action android:name="alarm_timer_for_notification" />
</intent-filter>
</receiver>
setAndAllowWhileIdle this is worked when screen is off and phone in idle mode
In marshmallow introduce the doze mode for battery saving. So the alarm not fired correctly in repeat mode.
So we use
https://developer.android.com/reference/android/app/AlarmManager.html#setAndAllowWhileIdle(int,%20long,%20android.app.PendingIntent)
From marshmallow and up, alarm waked up only 10 min interval,setAndAllowWhileIdle also fire service or notification 10 minutes once when phone is idle (screen is off).
In normal mode time interval working fine (I have checked 3 min's interval)
public class TimeService extends WakefulBroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
Log.i("TimeService", "onReceive");
Intent timeIntent = new Intent(context, NotificationService.class);
timeIntent.setAction(SETUP_TIMER_FOR_NOTIFICATION);
startWakefulService(context, timeIntent);
setAlarm(context);
}
public void setAlarm(Context context)
{
Timber.v(TAG +"set Alarm");
PreferencesHelper preferencesHelper =new PreferencesHelper(context);
AlarmManager alarmManager = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(context, TimeService.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, intent, 0);
int intervalInMinutes = preferencesHelper.getInt(context.getResources().getString(R.string.sha_loc_intervals), 1)* 60000;
if (android.os.Build.VERSION.SDK_INT >= 23) {
alarmManager.setAndAllowWhileIdle(AlarmManager.ELAPSED_REALTIME_WAKEUP,
SystemClock.elapsedRealtime()+intervalInMinutes , pendingIntent);
} else if (android.os.Build.VERSION.SDK_INT >= 19
&& android.os.Build.VERSION.SDK_INT < 23) {
alarmManager.setExact(AlarmManager.ELAPSED_REALTIME_WAKEUP, SystemClock.elapsedRealtime()+intervalInMinutes , pendingIntent);
} else {
alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, SystemClock.elapsedRealtime()+intervalInMinutes , pendingIntent);
}
}
public void cancelAlarm(Context context)
{
Timber.v(TAG +"cancel Alarm");
Intent intent = new Intent(context, TimeService.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, intent, 0);
AlarmManager alarmManager = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
alarmManager.cancel(pendingIntent);
}}
<receiver android:name=".TimeService"
android:enabled="true"
android:exported="true"
android:process=":remote">
</receiver>
In MainActivity.class
TimeService timeService =new TimeService();
timeService.setAlarm(MainActivity.this);
You want to take a permission in manifest file.
uses-permission android:name="android.permission.WAKE_LOCK"
WakeLock is a mechanism to keep the device on
I have a counter that needs to be reset at midnight every day as well as some notification that needs to be displayed whether the app is closed or not.
For that I have an alarmManager that is set up:
public void scheduleAlarm()
{
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.add(Calendar.DAY_OF_YEAR, 0);
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 01);
Intent intentAlarm = new Intent(this, AlarmReceiver.class);
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY,
PendingIntent.getBroadcast(getApplicationContext(), 1, intentAlarm,
PendingIntent.FLAG_UPDATE_CURRENT));
}
It is registered in the android manifest as follow:
<receiver android:name="com.whitepebblesplus.AlarmReceiver">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
</intent-filter>
</receiver>
and I have in the alarmReceiver class the following
public class AlarmReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent)
My problem is that whenever the app is closed the alarm won't go off and so the counter won't be reseted, not until the app starts again, which is really not what I want.
Anyone of you has an idea on how to make the alarm goes off whether the app is running or not?
thanks
I have looked everywhere for this solution most of the replies ask to set alarm in boot receiver.
i have implemented a boot receiver and started a service and set a alarm using set method.
Service is started fine but alarm is not setting.
please help i am stuck on that.
i can post some also if you want but boot receiver is working fine as i am also starting service in that
public class MyReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
SharedPreferences sharedPref = context.getSharedPreferences(
Util.SHARED_PREF_NAME, Context.MODE_PRIVATE);
long curTime = System.currentTimeMillis();
long endTime = sharedPref.getLong(Util.END_TIME, -1);
long startTime = sharedPref.getLong(Util.START_TIME, -1);
if (curTime < endTime && startTime >= curTime) {
Intent intent1 = new Intent(context, HUD.class);
PendingIntent pintent = PendingIntent.getService(context, 1987,
intent1, PendingIntent.FLAG_CANCEL_CURRENT);
AlarmManager alarm = (AlarmManager) context
.getSystemService(Context.ALARM_SERVICE);
alarm.setRepeating(AlarmManager.RTC_WAKEUP, endTime, 100, pintent);
Log.e("alaram set", endTime + " " + curTime);
}
Intent service = new Intent(context, HUD.class);
context.startService(service);
}
}
MyReceiver.java
<receiver
android:name=".MyReceiver"
android:enabled="true"
android:exported="true" >
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
Manifest.xml
Service started successfully after boot
but alarm.setRepeating(AlarmManager.RTC_WAKEUP, endTime, 100, pintent);
alarm is not working.
I think i clear my question.
Plz help
Intent intent1 = new Intent(context, HUD.class);
PendingIntent pintent = PendingIntent.getService(context, 1987,
intent1, PendingIntent.FLAG_CANCEL_CURRENT);
AlarmManager alarm = (AlarmManager) context
.getSystemService(Context.ALARM_SERVICE);
Calendar cal = Calendar.getInstance();
cal.add(Calendar.SECOND, 30);
alarm.setInexactRepeating(AlarmManager.RTC_WAKEUP,
cal.getTimeInMillis(), 100, pending);
Try your setInexactRepeating instead of setRepeating that is more performance optimized method.
I know this a basic problem but it is still driving me crazy. I am setting a repeating alarm but the receiver is never called.
Intent intent = new Intent(NewSchedule.this, RepeatingAlarm.class);
PendingIntent sender = PendingIntent.getBroadcast(NewSchedule.this, 0, intent, 0);
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.add(Calendar.SECOND, 10);
AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
am.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, calendar.getTimeInMillis(), 5 * 1000, sender);
Log.i("calendar",calendar.getTimeInMillis() + "");
Toast.makeText(NewSchedule.this, "repeating_scheduled", Toast.LENGTH_SHORT).show();
public class RepeatingAlarm extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context, "repeating_received", Toast.LENGTH_LONG).show();
}
}
<receiver android:name=".RepeatingAlarm" android:process=":remote" />
I am testing on my phone. The calendar log shows the exact time. I never get the Toast in the receiver class.
Reference : Android Alarm Manager with broadcast receiver
Intent sender = new Intent("WhatEverYouWant");
PendingIntent senderPIntent = PendingIntent.getBroadcast(context, 0, sender, 0);
AlarmManager alarm = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
alarm.set(AlarmManager.RTC_WAKEUP, triggerTime, senderPIntent);
// In Manifest.xml file
<receiver android:name="com.package.YourOnReceiver">
<intent-filter>
<action android:name="WhatEverYouWant" />
</intent-filter>
</receiver>
Actually it turned out my code was good. Somehow the alarm was up and running and thus for some unknown reason (at least to me) the recevier could not be called. I figured it out when I created a new project and tested that that receiver was working fine. I also had to stop that alarm. Then I went back to my original project and started the same alarm without changing any lines and it was working fine. Has anyone experienced this?