Develop Reference

Why the alarm receiver is not trigger in android?

I am implement a simple alarm function, which is used to trigger some function at the specific date time.
The problem is I have set the time already, but the receiver seems never called.
Here is how I implement:......
1) in manifest :
<uses-permission android:name="com.android.alarm.permission.SET_ALARM" />
and
<receiver android:name=".Listener.AlarmReceiver" />
2) in the main activity (I would like to trigger on 4th June 2014, 02:06 p.m.)
profilePic.setOnClickListener(new OnClickListener(){
#Override
public void onClick(View v) {
GregorianCalendar date = new GregorianCalendar(2014,6,4,14,6);
long dateTime = date.getTimeInMillis();
Log.d("test1",date.toString());
AlarmManager alarmManager = (AlarmManager) ctx.getSystemService(Context.ALARM_SERVICE);
Intent intentAlarm = new Intent(ctx, AlarmReceiver.class);
alarmManager.set(AlarmManager.RTC_WAKEUP, dateTime, PendingIntent.getBroadcast(ctx, 1, intentAlarm, PendingIntent.FLAG_UPDATE_CURRENT));
}
});
And I have also log the time
java.util.GregorianCalendar[time=1404453960000,areFieldsSet=true,lenient=true,zone=Asia/Hong_Kong,firstDayOfWeek=1,minimalDaysInFirstWeek=1,ERA=1,YEAR=2014,MONTH=6,WEEK_OF_YEAR=27,WEEK_OF_MONTH=1,DAY_OF_MONTH=4,DAY_OF_YEAR=185,DAY_OF_WEEK=6,DAY_OF_WEEK_IN_MONTH=1,AM_PM=1,HOUR=2,HOUR_OF_DAY=14,MINUTE=6,SECOND=0,MILLISECOND=0,ZONE_OFFSET=28800000,DST_OFFSET=0]
3) Receiver
public class AlarmReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
Log.d("test1", "alarm");
Toast.makeText(context, "Alarm Triggered", Toast.LENGTH_LONG).show();
}
}
I waited until the 02:06p.m. but nothing happened, and receiver is not called. How to fix the problem? Also, is it possible to set more than one alarm, is it all I need to do is to create another datetime and fire the alarmManager.set() again, will it overwrite the old timer? Thanks for helping.
Updated
For the AlarmReceiver in the mainifest ,
I changed to
<receiver android:name="com.example.antismoke.Listener.AlarmReceiver" />
And the class is
package com.example.antismoke.Listener;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import android.widget.Toast;
public class AlarmReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
Log.d("test1", "alarm");
Toast.makeText(context, "Alarm Triggered", Toast.LENGTH_LONG).show();
}
}
so I think package name is not the root cause? Thanks for helping

Instead of using GregorianCalendar , try to use Calendar.
Try the following, it should work:
Intent i = new Intent(getApplicationContext(), AlarmReceiver.class);
PendingIntent sender = PendingIntent.getBroadcast(AlarmSample.this, 0, i, 0);
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, hour); // set hour
calendar.set(Calendar.MINUTE, minuite); // set minute
calendar.set(Calendar.SECOND, 0); // set seconds
AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);
am.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), sender);

you should use package name correctly, if you have different package ,
receiver android:name="XXX.XXXXXXXXXXXXXXX.AlarmReceiver" />
check this out

1) You don't need this persmission (com.android.alarm.permission.SET_ALARM) to receive alarm.
2) Change this line:
<receiver android:name=".Listener.AlarmReceiver" />
to
<receiver android:name=".AlarmReceiver" />

replace alarmManager.set with alarmManager.setRepeating
or try to use this:
public static AlarmManager am = null;
public static PendingIntent sender;
Intent intent1 = new Intent(ctx, Reciver.class);
sender = PendingIntent.getBroadcast(ctx, 1, intent1, 0);
am = (AlarmManager) getSystemService(ALARM_SERVICE);
long l = new Date().getTime();
am.setRepeating(AlarmManager.RTC_WAKEUP, l, 1500, sender);

Ok , finally I figure out it is because the month start at 0 in GregorianCalendar. So June should use 5 instead of 6
I should have noticed the problem. Thanks for all you guys

Android alarm and broadcast

I have defined my Android alarm and BroadcastReceiver as follows. My hope was that I want the alarm to go off two minutes later and every 15 minutes subsequently. This does not seem to be happening. Why is this?
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.MINUTE, calendar.get(Calendar.MINUTE) + 2);
PendingIntent pi = PendingIntent.getBroadcast(getApplicationContext(), 0, new Intent(getApplicationContext(), DailyNotificationReceiver.class), PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager am = (AlarmManager) getApplicationContext().getSystemService(Context.ALARM_SERVICE);
am.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), AlarmManager.INTERVAL_FIFTEEN_MINUTES, pi);
public class DailyNotificationReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
Log.d("received", "received");
}
}

As discussed in the comments, the BroadcastReceiver was not registered.
Please register the BroadcastReceiver in the manifest

AlarmManager inside BroadcastReceiver when BOOT_COMPLETED

I have a Service "GroupsTaskAlarmChecker" that is called every 20 seconds by AlarmManager in onCreate of Groups.class activity this way:
int seconds = 20;
Intent myIntent = new Intent(Groups.this, GroupsTaskAlarmChecker.class);
pendingIntent = PendingIntent.getService(Groups.this, 0, myIntent, 0);
AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.add(Calendar.SECOND, 10);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), seconds * 1000, pendingIntent);
This works perfectly. But I need to do that when device boot.
Then I know I have to make AndroidManifest like this:
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<receiver android:name=".ReceiverBoot">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED">
<category android:name="android.intent.category.HOME">
</category></action></intent-filter>
</receiver>
and then mi broadcastReceiver like this:
public class ReceiverBoot extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
int seconds = 20;
Intent myIntent = new Intent(context, GroupsTaskAlarmChecker.class);
pendingIntent = PendingIntent.getService(context, 0, myIntent, 0);
AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.add(Calendar.SECOND, 10);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), seconds * 1000, pendingIntent);
}
}
but inside this onReceive I dont know how can I do the same that I did before (with intent and alarmManager to start the service each 20 seconds).
Error in this line:
AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
Is possible that I can't make an AlarmManager inside BroadcastReceiver?
I thank you all, I am an Android begginer and I need your help. Sorry for my english ;)

To summarize the answers and comments above: the onReceive handler receives a context which can be used to access getSystemService and ALARM_SERVICE. Sample code:
public class MyReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
// Start periodic service.
Calendar cal = Calendar.getInstance();
Intent srvIntent = new Intent(context, MyService.class);
PendingIntent pIntent = PendingIntent.getService(context, 0, srvIntent, 0);
// Use context argument to access service
AlarmManager alarm =
(AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
// Repeat every 5 seconds
alarm.setInexactRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(),
5000, pIntent);
}
}
}
Create a new class with this code and of course change MyReceiver and MyService to the names in your implementation.

ALARM_SERVICE is neither defined in the class ReceiverBoot nor in BroadcastReceiver.
You should reference Context.ALARM_SERVICE as the argument for getSystemService(String).

Here is a little contribution, which I believe that can add a more complete vision about achieving the goal of this question.
First: configure a "receiver" inside of the AndroidManifest from your app.
<receiver
android:name=".AlarmBroadcastReceiver"
android:enabled="true">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED"/>
</intent-filter>
</receiver>
Second: with a Class that EXTENDS the Abstract Class BroadcastReceiver, you should determine if the Intent Action was "BOOT_COMPLETED". If the condition is satisfied, you can call a method from your class which has all the construction to your Alarm.
See the following snippet bellow.
public class AlarmBroadcastReceiver extends BroadcastReceiver {
String TAG = "ALARMS";
String CLASS = this.getClass().getSimpleName() + ": ";
Context alarmContext;
#Override
public void onReceive(final Context context, Intent intent) {
Log.d(TAG, CLASS + "[START] onReceive()... ");
alarmContext = context;
if (Intent.ACTION_BOOT_COMPLETED.equals(intent.getAction())) {
Log.d(TAG, CLASS + "BOOT_COMPLETED action has been received.");
setAlarmOnBoot();
}
Log.d(TAG, CLASS + "[END] onReceive()... ");
}
public void setAlarmOnBoot() {
Log.d(TAG, CLASS + "[START] - setAlarmOnBoot()");
final long beginAt = SystemClock.elapsedRealtime() + 60 * 1000;
final long interval = 300000; // 5 minutes
try {
AlarmManager alarm = (AlarmManager) alarmContext.getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(alarmContext, AlarmBroadcastReceiver.class);
PendingIntent pIntent = PendingIntent.getService(alarmContext, 0, intent, 0);
alarm.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, beginAt, interval, pIntent);
Log.d(TAG, CLASS + "the Alarm has been configured successfully (5 minutes) of interval.");
} catch (Exception e) {
Log.d(TAG, CLASS + "an exception has ocurred while setting the Alarm...");
e.printStackTrace();
}
Log.d(TAG, CLASS + "[END] - setAlarmOnBoot()");
}
}

in your onReceive:
if ("android.intent.action.BOOT_COMPLETED".equals (intent.getAction())){
//start it again here
}

Android: why doesn't AlarmManager work?

I have the following code. which is supposed to send a message in logcat at an interval but is not working. There are a lot of similar posts on stackoverflow but I am not able to figure out the problem. Is there a brainiac somewhere that can help me?
<receiver android:name="BoopoohooAlarmReceiver"></receiver>
public void startAlarmManager(long interval){
Context context = getApplicationContext();
Intent intent = new Intent(context, BoopoohooAlarmReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, intent, 0);
AlarmManager alarmManager = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.add(Calendar.SECOND, 10);
Log.i(DEBUG, "hollaa");
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), interval, pendingIntent);
}
public class BoopoohooAlarmReceiver extends BroadcastReceiver {
private final String DEBUG = "BoopoohooAlarmReceiver";
#Override
public void onReceive(Context context, Intent intent) {
Log.i(DEBUG, "onReceive");
}
}
Thanks.

Try to add the "." (point) in front of receiver name in the android manifest file declaration.
<receiver android:name=".BoopoohooAlarmReceiver"></receiver>
This may help too.

Refer this links Alarm Manager 1 , Alarm Manager 2 , Alarm Manager 3it will be helpful

BroadcastReceiver is not called

I have to following code to call the BroadcastReceiver:
public class WorkItemAlarmManager {
...
public void initAlarm(HelpMe helpMe, String delay,String period,WorkItem workItem){
//HelpMe = Activity
helpMe.registerReceiver(new WorkItemAlarmHandler() , new IntentFilter("WORK_ITEM_ALARM"));
Intent intent = new Intent("WORK_ITEM_ALARM");
intent.setClass(helpMe, WorkItemAlarmManager.class);
intent.putExtra("work_item", workItem);
PendingIntent mAlarmSender = PendingIntent.getService(helpMe, 0,intent, 0);
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
//System.out.println("START"+System.currentTimeMillis());
calendar.add(Calendar.SECOND, calcDelayMillis(delay));
//System.out.println("END"+calendar.getTimeInMillis());
AlarmManager am = (AlarmManager) helpMe.getSystemService(Context.ALARM_SERVICE);
am.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), mAlarmSender);
}
...
}
and the BroadcastReceiver:
public class WorkItemAlarmHandler extends BroadcastReceiver{
#Override
public void onReceive(Context context, Intent intent) {
....
}
}
But the WorkItemAlarmHandler is never called.
Update:
I tried to register the BroadcastReceiver in the manifest at first. But that didn't work:
<receiver
android:name="de.helpme.alarm.WorkItemAlarmHandler"
android:enabled="true"
android:label="WorkItemAlarmHandler" >
<intent-filter>
<action android:name="WORK_ITEM_ALARM" />
</intent-filter>
</receiver>
Thanks for your answers :). Now it works - but i dont yet know which one is the correct because i implemented both answers at once. If a figure out which was the right one i mark the right as answer.
Update:
The cause of the problem as i see it was:
PendingIntent mAlarmSender = PendingIntent.getService(helpMe, 0,intent, 0);
With this code it works fine:
PendingIntent mAlarmSender = PendingIntent.getBroadcast(helpMe, 0, intent, 0);
Thanks again for all your help!

try this :
In WorkItemAlarmManager ;
public class WorkItemAlarmManager {
...
public void initAlarm(HelpMe helpMe, String delay,String period,WorkItem workItem){
Intent intent =new Intent(helpMe, WorkItemAlarmHandler.class);
intent.setAction("WORK_ITEM_ALARM");
intent.putExtra("work_item", workItem);
PendingIntent mAlarmSender=
PendingIntent.getBroadcast(helpMe, 0, intent, 0);
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
//System.out.println("START"+System.currentTimeMillis());
calendar.add(Calendar.SECOND, calcDelayMillis(delay));
//System.out.println("END"+calendar.getTimeInMillis());
AlarmManager am = (AlarmManager) helpMe.getSystemService(Context.ALARM_SERVICE);
am.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), mAlarmSender);
}
...
}
and in WorkItemAlarmHandler:
public class WorkItemAlarmHandler extends BroadcastReceiver{
#Override
public void onReceive(Context context, Intent intent) {
if(intent.getAction().equals("WORK_ITEM_ALARM")){
Toast.makeText(context, "WORK_ITEM_ALARM", Toast.LENGTH_LONG).show();
}else{
Toast.makeText(context, "repeating alarm",
Toast.LENGTH_LONG).show();
}
}
}

Your code uses:
intent.setClass(helpMe, WorkItemAlarmManager.class);
but with the setClass(...) method you specify the class that should finally handle the intent.
Therefore you should write:
intent.setClass(helpMe, WorkItemAlarmHandler.class);
As far as I remember, if you specify the class or component manually (eg. with the setClass() method) this object has to be specified in the manifest, so make sure the receiver is mentioned there.