Develop Reference

Alarm Manager not starting after 60 seconds

I'm trying to set my alarm manager working, just simple schedule, firing toast every minute, but it's not working, what's wrong with the code?
Main Activity :
public void klik(View view) {
startalarm();
}
public void startalarm(){
AlarmManager manager = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
Intent intent;
PendingIntent pendingIntent;
intent = new Intent(this, AlarmToastReciever.class);
pendingIntent = PendingIntent.getBroadcast(this,0,intent,0);
manager.setRepeating(AlarmManager.RTC_WAKEUP, SystemClock.elapsedRealtime()+3000,+60000,pendingIntent);
}
}
AlarmToastReciever class :
public class AlarmToastReciever extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent){
Toast.makeText(context,"GOWNO", Toast.LENGTH_SHORT).show();
}
}

As stated in documentation
As of Android 4.4 (API Level 19), all repeating alarms are inexact. Note that while setInexactRepeating() is an improvement over setRepeating(), it can still overwhelm a server if every instance of an app hits the server around the same time. Therefore, for network requests, add some randomness to your alarms, as discussed above.
You can use "setInexactRepeating()" or set an exact one time alarm then set next alarm in On Receive method
Also make sure you added your receiver to the manifest file, between application tag, like
<receiver android:name=".AlarmToastReciever"
android:enabled="true">
<intent-filter>
</intent-filter>
</receiver>

Use this code to initialize alarm manager.
public void setupAlarm() {
final Calendar calNow = Calendar.getInstance();
final Calendar calSet = (Calendar) calNow.clone();
calSet.set(Calendar.HOUR_OF_DAY, calNow.get(Calendar.HOUR_OF_DAY));
calSet.set(Calendar.MINUTE, calNow.get(Calendar.MINUTE) + 1);
calSet.set(Calendar.SECOND, calNow.get(Calendar.SECOND));
final Intent intent = new Intent(this, UploadStarterReceiver.class);
final PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 1,
intent, 0);
final AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP, calSet.getTimeInMillis(),
60 * 1000, pendingIntent);
}

Android How to set exact repeating alarm?

I'm building an alarm application which will have an exact repeating alarm.
Seeing how for Repeating Android provides only Inexact alarm with possible delay of 75% of chosen interval, I've tried making Exact alarm which upon triggering sets itself once again. This type of alarm works perfectly as long as my screen is kept on. But as soon as it goes to sleep, the alarm works fine the first time, but second alarm which is set programmaticaly fires with delay as if I was using Inexact method.
As an alternative solution I'm thinking of making an InexactRepeating alarm which will fire up every minute to check whether it's "the time". This way my alarm will be with 2 minute imprecision interval, which is acceptable. But I'm not sure how much it will strain phone's battery.
Any ideas guys?
Here's my attemp at Exact alarm:
AlarmManager.java
public static void setAlarm(Context context){
AlarmManager alarmManager = (AlarmManager) context.getSystemService(context.ALARM_SERVICE);
//SET BROADCAST RECEIVER WHICH WILL BE THE ONE TO LISTEN FOR THE ALARM SIGNAL
Intent intent = new Intent(context, AlarmTriggerBroadcastReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 22222, intent, PendingIntent.FLAG_CANCEL_CURRENT);
//SETING THE ALARM
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
alarmManager.setExact(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 300000, pendingIntent);
} else {
alarmManager.setExactAndAllowWhileIdle(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 300000, pendingIntent);
}
}
AlarmTriggerBroadcastReceiver.java
public class AlarmTriggerBroadcastReceiver extends BroadcastReceiver {
private final static String TAG_ALARM_TRIGGER_BROADCAST = "ALARM_TRIGGER_BROADCAST";
#Override
public void onReceive(Context context, Intent intent) {
//WAKE UP DEVICE
WakeLocker.acquire(context);
//LAUNCH PAGE
Intent intent1 = new Intent();
intent1.setClassName(context.getPackageName(), SomeActivity.class.getName());
intent1.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent1);
Toast.makeText(context, "TOAST ALARM", Toast.LENGTH_LONG).show();
};
//SET NEW ALARM
AlarmManagerActivity.setAlarm(context);
WakeLocker.release();
}
}
WakeLocker.java
//WAKES UP DEVICE IF PHONE'S SCREEN LOCKED
public abstract class WakeLocker {
private static PowerManager.WakeLock wakeLock;
public static void acquire(Context ctx) {
//if (wakeLock != null) wakeLock.release();
PowerManager pm = (PowerManager) ctx.getSystemService(Context.POWER_SERVICE);
wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK |
PowerManager.ACQUIRE_CAUSES_WAKEUP |
PowerManager.ON_AFTER_RELEASE, "myapp:WAKE_LOCK_TAG");
wakeLock.acquire();
}
public static void release() {
if (wakeLock != null) wakeLock.release(); wakeLock = null;
}
}
Manifest
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="com.android.alarm.permission.SET_ALARM"/>
<uses-permission android:name="android.permission.SET_ALARM"/>
<receiver
android:name=".Alarm.AlarmTriggerBroadcastReceiver"
android:process=":remote">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED"></action>
</intent-filter>
<intent-filter android:priority="1">
<action android:name="my.app.here.ALARM_RECIEVED" />
</intent-filter>
</receiver>
What do, fellow coders?

have you tried using a WorkManager instead of having to use the Broadcast Receivers? See details here. And an app demo here.

Alarm not going off when app killed

How am I supposed to implement an alarm to open the dismiss/snooze screen after the app is destroyed? My alarm works perfectly fine as long as the app stays up, here's how I schedule the alarm:
//instantiate calendar to call alarm on time match
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, alarmTimePicker.getCurrentHour());
calendar.set(Calendar.MINUTE, alarmTimePicker.getCurrentMinute());
//if time is set earlier than current (e.g set for 6:59pm, currently 7pm), do not play until next clock cycle/day
if(calendar.before(Calendar.getInstance())) {
calendar.add(Calendar.DATE, 1);
}
//cancel any currently pending intents if toggle button is toggled on
Intent myIntent = new Intent(MainActivity.this, AlarmReceiver.class);
PendingIntent.getBroadcast(MainActivity.this, 0, myIntent, PendingIntent.FLAG_UPDATE_CURRENT).cancel();
//add parameters to pass to activities that play the alarm
myIntent.putExtra("stream",stream);
myIntent.putExtra("seconds",snoozeSeconds);
myIntent.putExtra("link",ytLink);
//create pending intent to broadcast to activity that plays the alarm
pendingIntent = PendingIntent.getBroadcast(MainActivity.this, 0, myIntent, 0);
alarmManager.setExact(AlarmManager.RTC, calendar.getTimeInMillis(), pendingIntent);
And I use a receiver that's fairly simple:
public class AlarmReceiver extends WakefulBroadcastReceiver {
#Override
public void onReceive(final Context context, Intent intent) {
//....
MainActivity.ringtone.play();
Intent alarmIntent = new Intent(context, AlarmActivity.class);
context.startActivity(alarmIntent); //start dismiss screen

As per your question, This is what i understand, Let me know if misunderstand your question
if you want to open/active your alaram after App close or device reboot
then you have add intent filter android.intent.action.BOOT_COMPLETED in your AlarmReceiver AndroidManifest.xml and you can manage the actions on your AlarmReceiver onReceive methond
Please check the following code
public void onReceive(Context context, Intent intent) {
if(intent == null){
return;
}
String action = intent.getAction();
if (action != null && action.equalsIgnoreCase("android.intent.action.BOOT_COMPLETED")) {
}
AlarmReceiver.completeWakefulIntent(intent);
}
Add intent filter actions in your AndroidManifest.xml file
<receiver android:name="com.monster.android.Services.AlarmReceiver"
android:enabled="false">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED"/>
</intent-filter>
</receiver>

You can use stopService() method:
stopService(new Intent(MainMenu.this, AlarmActivity.class));

Android notification programmed

I have build a simple app that show a notification when i click on a button. How can show a programmed notify?
The code that i call is:
Notification.Builder builder = new Notification.Builder(this)
.setTicker("Notifica")
.setSmallIcon(android.R.drawable.stat_notify_chat)
.setContentTitle("Notifica")
.setContentText("Hai una notifica!")
.setAutoCancel(true)
.setContentIntent(PendingIntent.getActivity(this, 0,
new Intent(this, MainActivity.class)
.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK), 0));
NotificationManager nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
nm.notify("interstitial_tag", 1, builder.build());

You can use AlarmManager in bundle with BroadcastReceiver.
At first you must create pending intent and register it with AlarmManager.set somewhere.
And then create your broadcast receiver and receive that intent.
Update: here is the code I have promised.
At first you need to create broadcast receiver.
public class NotifyHandlerReceiver extends BroadcastReceiver {
public static final String ACTION = "me.pepyakin.defferednotify.action.NOTIFY";
public void onReceive(Context context, Intent intent) {
if (ACTION.equals(intent.getAction())) {
Notification.Builder builder = new Notification.Builder(context)
.setTicker("Notifica")
.setSmallIcon(android.R.drawable.stat_notify_chat)
.setContentTitle("Notifica")
.setContentText("Hai una notifica!")
.setAutoCancel(true)
.setContentIntent(PendingIntent.getActivity(context, 0,
new Intent(context, MainActivity.class).addFlags(Intent.FLAG_ACTIVITY_NEW_TASK), 0));
NotificationManager nm = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
nm.notify("interstitial_tag", 1, builder.build());
}
}
}
This is your broadcast receiver that can handle notification requests. For it can work, you must register it in your AndroidManifest.xml. If you don't do it, Android won't be able to handle your notification request.
Just add <receiver/> declaration into your <application/> tag.
<receiver android:name=".NotifyHandlerReceiver">
<intent-filter>
<action android:name="me.pepyakin.defferednotify.action.NOTIFY" />
</intent-filter>
</receiver>
Take a note, that action name be exactly as defined in NotifyHandlerReceiver.ACTION.
Then you can use this code
public static final int REQUEST_CODE_NOTIFY = 1;
public void scheduleNotification(long delayTimeMs) {
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
long currentTimeMs = SystemClock.elapsedRealtime();
PendingIntent pendingNotifyIntent = PendingIntent.getBroadcast(
this,
REQUEST_CODE_NOTIFY,
new Intent(NotifyHandlerReceiver.ACTION),
PendingIntent.FLAG_UPDATE_CURRENT);
alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, currentTimeMs + delayTimeMs, pendingNotifyIntent);
}
from your activity to start a notification delayed on delayTimeMs amount of milliseconds.

alarm manager does not launch android

Well in my app I am trying the following functionality. I want depending on the date and the time, the user to receiver some notifications.
For example:
September 9, 19.13 receive notification with message1
September 10, 07.30, with message 2,
same day, but 11.50, with message 3 and so on...
I used an alarm and a push bar notification but it worked only for the first one. So I serached for that and is is stated that I must use a repeating alarm manager.
Before I post my code I want to clarify some things:
1) I am thinking it that it should work like that:
i must check every 1-2 min, what time is it, fetch my next "time" from an array that events are stored, and set ana alarm for that, right? Then given that this bynch of code will run every 1-2 minutes, i will check again, fetch the next event,set alarm for that time and so on.
Am I correct?
So to begin with, i am trying to implement a repeating alarm manager which every 1 min will display me a Toast message (If I do this and replacing the toast message with get_next_event() and set_next_notification() will do the job I think. - These function are working fine in my project with only one alarm being set).
But problem is that when I am starting my service I see nothing.
here is my code:
Alarm.java
public class Alarm extends BroadcastReceiver
{
#Override
public void onReceive(Context context, Intent intent)
{
Toast.makeText(context, "Starting Alarm Manager", Toast.LENGTH_LONG).show(); // For example
PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "");
wl.acquire();
// Put here YOUR code.
Toast.makeText(context, "Alarm !!!!!!!!!!", Toast.LENGTH_LONG).show(); // For example
wl.release();
}
public void SetAlarm(Context context)
{
Toast.makeText(context, "Setting Alarm Manager", Toast.LENGTH_LONG).show(); // For example
AlarmManager am=(AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
Intent i = new Intent(context, Alarm.class);
PendingIntent pi = PendingIntent.getBroadcast(context, 0, i, 0);
am.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), 1000 * 60 , pi); // Millisec * Second * Minute
}
public void CancelAlarm(Context context)
{
Intent intent = new Intent(context, Alarm.class);
PendingIntent sender = PendingIntent.getBroadcast(context, 0, intent, 0);
AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
alarmManager.cancel(sender);
}
YourService.java
public class YourService extends Service
{
Alarm alarm = new Alarm();
public void onCreate()
{
super.onCreate();
Toast.makeText(YourService.this, "Service Created", Toast.LENGTH_LONG).show(); // For example
}
public void onStart(Context context,Intent intent, int startId)
{
Toast.makeText(YourService.this, "Setting from Service", Toast.LENGTH_LONG).show(); // For example
alarm.SetAlarm(context);
}
#Override
public IBinder onBind(Intent intent)
{
return null;
}
}
DemoActivity.java
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
buttonStart = (Button) findViewById(R.id.buttonStart);
buttonStop = (Button) findViewById(R.id.buttonStop);
buttonStart.setOnClickListener(this);
buttonStop.setOnClickListener(this);
}
public void onClick(View src) {
switch (src.getId()) {
case R.id.buttonStart:
Toast.makeText(ServicesDemo.this, "Button Pressed", Toast.LENGTH_LONG).show(); // For example
Log.d(TAG, "onClick: starting srvice");
startService(new Intent(this, YourService.class));
break;
case R.id.buttonStop:
Log.d(TAG, "onClick: stopping srvice");
stopService(new Intent(this, YourService.class));
break;
}
}
So i press the button, I see that "button is pressed" , i see that "service created" but then none of the toasts that alarm started are being shown. And of course, I see nothing every 1 min.
here is my manifest.
<application android:icon="#drawable/ic_launcher" android:label="#string/app_name">
<activity android:name=".ServicesDemo" android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:enabled="true" android:name=".YourService" />
<receiver android:process=":remote" android:name="Alarm"></receiver>
</application>
<uses-sdk android:minSdkVersion="8" />
<uses-permission android:name="android.permission.WAKE_LOCK"></uses-permission>
</manifest>
So what do I need to change in my code or in the manifest?

I suggest you to use AlarmManager for this: http://developer.android.com/reference/android/app/AlarmManager.html .