Develop Reference

Changing a variable from Notification Method

I added a notification feature to my app, when the user clicks on the notification it sends him to a certain activity in my app, but I also want it to change an integer variable number, I tried defining the variable static and do:
ActivityName.Variable = ActivityName.Variable + 1 or ActivityName.Variable++;
And it actually worked! but only when I change the date on my phone manually, so when the user sees the notification after waiting 1 day (the notification is daily) and clicks on it...he get to the activity but with no increase in the variable.
here's the notification codes:
public void setNotificationOn() { //This method sets the notification...so after 24h it will be triggered
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, 24);
Intent intent = new Intent(getApplicationContext(), NotificationReceiverActivity.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);
}
package com.example.wordspuzzlejsontest;
public class NotificationReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
LevelActivity.stars++; //This is the variable which I'm trying to increase
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
Intent repeating_intent = new Intent(context, LevelsListActivity.class);
repeating_intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pendingIntent = PendingIntent.getActivity
(context, 100, repeating_intent, PendingIntent.FLAG_CANCEL_CURRENT);
NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
.setContentIntent(pendingIntent)
.setSmallIcon(android.R.drawable.star_big_off)
.setContentTitle("Collect your daily star")
.setContentText("Click to collect your daily star")
.setAutoCancel(true)
.setColor(Color.BLUE);
notificationManager.notify(100, builder.build());
}
}

updating notification in android every half n hour

I have the code for showing the notification in the status bar. I know the updating can be done by calling setLatestEventInfo() again, but I want the updating to be done in every half an hour.
How do I keep track of the time?
Does somebody know any function for that?
I even thought of using counter which keeps getting incremented every half an hour but again retrieving the time is a problem.
String ns = Context.NOTIFICATION_SERVICE;
NotificationManager mNotificationManager = (NotificationManager) getSystemService(ns);
int icon = R.drawable.index1;
CharSequence tickerText = "Hello";
long when = System.currentTimeMillis();
Notification notification = new Notification(icon, tickerText, when);
Context context = getApplicationContext();
CharSequence notificationTitle = "My notification";
CharSequence notificationText = "Hello World!";
Intent notificationIntent = new Intent(this, NotificationAppActivity.class);
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);
notification.setLatestEventInfo(context, notificationTitle, notificationText, contentIntent);
final int HELLO_ID = 1;
mNotificationManager.notify(HELLO_ID, notification);
notification.defaults |= Notification.DEFAULT_SOUND;
notification.defaults |= Notification.DEFAULT_VIBRATE;
notification.defaults |= Notification.DEFAULT_LIGHTS;
}

You have to use AlarmManager and schedule recurring event every 30 minutes. Then you need to handle this event and in broadcast receiver's onReceive() update your notification, but usually sending Intent to your service to do the job.
Example code:
Intent intent = new Intent(this, MyAlarmBroadcastReceiver.class);
PendingIntent sender = PendingIntent.getBroadcast(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager am = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE);
long recurring = (30 * 60000); // in milliseconds
am.setRepeating(AlarmManager.RTC, Calendar.getInstance().getTimeInMillis(), recurring, sender);
and your MyAlarmBroadcastReceiver is regular BroadcastReceiver with code in onReceive(). I prefer to use one broadcast receiver so I also add some additional data to the intent so my broadcast receiver knows what it should do, but you can have it separated if you like.
public class MyBroadcastReceiver extends BroadcastReceiver {
#Override
public void onReceive( Context context, Intent intent ) {
// ... do what you need to do here...
}
}

Use alarmManager as in example bellow:
AlarmManager mgr=(AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
Intent i=new Intent(context, OnAlarmReceiver.class);
PendingIntent pi=PendingIntent.getBroadcast(context, 0, i, 0);
mgr.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, SystemClock.elapsedRealtime(), PERIOD, pi);

Android alarm with notification running any date when I change date

I am using AlarmManager and NotificationManager with BroadcastReceiver.
When I set an alarm with a specific date, it is working the first time. However, when I modify the date and click the confirm button, the alarm is working any date
immediately. I want to set the alarm interval day after expired date with fixed time.
What is the problem with it? I don't understand at the moment.
confirmButton.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v) {
//set alarm with expiration date
am = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
setOneTimeAlarm();
Toast.makeText(fridgeDetails.this, "Alarm automatic set",
Toast.LENGTH_SHORT).show();
setResult(RESULT_OK);
finish();
}
public void setOneTimeAlarm() {
c.set(Calendar.HOUR_OF_DAY, 14);
c.set(Calendar.MINUTE, 49);
c.set(expiredYear, expiredMonth, expiredDay);
Intent myIntent = new Intent(fridgeDetails.this, AlarmService.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(
fridgeDetails.this, 0, myIntent, PendingIntent.FLAG_ONE_SHOT);
am.setRepeating(AlarmManager.RTC_WAKEUP, c.getTimeInMillis(),
AlarmManager.INTERVAL_DAY, pendingIntent);
}
});
AlarmService.java
public class AlarmService extends BroadcastReceiver{
NotificationManager nm;
#Override
public void onReceive(Context context, Intent intent) {
nm = (NotificationManager) context.getSystemService(
Context.NOTIFICATION_SERVICE);
CharSequence from = "Check your fridge";
CharSequence message = "It's time to eat!";
PendingIntent contentIntent = PendingIntent.getActivity(context, 0,
new Intent(), 0);
Notification notif = new Notification(R.drawable.ic_launcher,
"Keep Fridge", System.currentTimeMillis());
notif.setLatestEventInfo(context, from, message, contentIntent);
notif.defaults |= Notification.DEFAULT_SOUND;
notif.flags |= Notification.FLAG_AUTO_CANCEL;
nm.notify(1, notif);
}
}

You need to set the property instead of FLAG_ONE_SHOT. This is for single alarm event not for the repeat. try this
PendingIntent pendingIntent = PendingIntent.getBroadcast(
fridgeDetails.this, 0, myIntent, PendingIntent.FLAG_UPDATE_CURRENT);
see more detail about from here
Edit:
As you do for notification with PendingIntent
PendingIntent contentIntent = PendingIntent.getActivity(context, 0,new Intent(), 0);
In this you pass the empty object of Intent you need to pass the class name for that when you click on notification which Activity will be launch like in Alarm set time you do
Intent myIntent = new Intent(fridgeDetails.this, AlarmService.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(
fridgeDetails.this, 0, myIntent, PendingIntent.FLAG_UPDATE_CURRENT);
now just pass the Acitivity name in the intent like suppose you want to launch your home activity and activity name like "homeactivity"
PendingIntent contentIntent = PendingIntent.getActivity(context, 0,new Intent(context,HomeActivity.class), 0);

set notification alert

hi ia m new to android..
i have developed a programme to set notification onspecific time
but the problem is it shows notification only of date before october 2011
if i enter any date of november its not showing any notification..
seems strange but really stuck here....
main activity..
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Calendar cal = Calendar.getInstance(); // for using this you need to
cal.set(Calendar.MONTH, 11);
cal.set(Calendar.YEAR, 2011);
cal.set(Calendar.DAY_OF_MONTH, 25);
cal.set(Calendar.HOUR_OF_DAY, 18);
cal.set(Calendar.MINUTE, 28);
Intent alarmintent = new Intent(getApplicationContext(),
AlarmReceiver.class);
alarmintent.putExtra("title", "Title of our Notification");
alarmintent.putExtra("note", "Description of our Notification");
int HELLO_ID = 1;
PendingIntent sender = PendingIntent.getBroadcast(
getApplicationContext(), HELLO_ID, alarmintent,
PendingIntent.FLAG_UPDATE_CURRENT |
Intent.FILL_IN_DATA);
AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
am.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), sender);
}
and the alarm reciever activity...
public class AlarmReceiver extends BroadcastReceiver {
private static final String NotificationManager = null;
private static int NOTIFICATION_ID = 0;
#Override
public void onReceive(Context context, Intent intent) {
(NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
NotificationManager manger = (NotificationManager) context
.getSystemService(Context.NOTIFICATION_SERVICE);
Notification notification = new Notification(R.drawable.ic_launcher,
"Combi Note", System.currentTimeMillis());
PendingIntent contentIntent = PendingIntent.getActivity(context,
NOTIFICATION_ID, new Intent(context,
AlarmReceiver.class), 0);
Bundle extras = intent.getExtras();
String title = extras.getString("title");
String note = extras.getString("note");
notification.setLatestEventInfo(context, note, title, contentIntent);
notification.flags = Notification.FLAG_INSISTENT;
notification.defaults |= Notification.DEFAULT_SOUND;
manger.notify(NOTIFICATION_ID, notification);
}
};

Calendar.set(Calendar.MONTH, month)
Expects a 0-based value. 11 is december.

You are setting an alarm for 5/5/2011, this date has passed so it is executed immediately.
When you receive a instance of Calendar, I think that the system automatically fills in the current date & time. So change only what you need to change (I.E if you want to send a notification in 5 days, change the day only in the calendar instance)
By the way, when clicking the notification it will, again, call your BroadcastReceiver and this time the intent won't have the extras you have put in it while in the activity. When clicking the notification, you should launch an activity - not a broadcast receiver.

AlarmManager starting application instead of just sending notification

I currently have an app which, when a button is pressed, and after a certain period of time, a statusbar notification is set.
Everything works fine apart from the fact if the user does not have the application open, when the notification appears, the app also reopens. This is not what i would like to happen. I would like the notification to appear on it's own (wherever the user is).
On my button press i use:
// get a Calendar object with current time
Calendar cal = Calendar.getInstance();
// add minutes to the calendar object
cal.add(Calendar.SECOND, time);
Intent alarmintent = new Intent(getApplicationContext(), AlarmReceiver.class);
alarmintent.putExtras(bundle);
// In reality, you would want to have a static variable for the request code instead of 192837
PendingIntent sender = PendingIntent.getBroadcast(getApplicationContext(), HELLO_ID, alarmintent, 0);
// Get the AlarmManager service
AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
am.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), sender);
This calls my AlarmReceiver.class, which uses this code to call my notification class:
Intent myIntent = new Intent(context, Note.class);
myIntent.putExtras(bundle2);
myIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK|Intent.FLAG_ACTIVITY_CLEAR_TOP);
context.startActivity(myIntent);
notification.class:
public class Note extends Activity {
/** Called when the activity is first created. */
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
String ns = Context.NOTIFICATION_SERVICE;
final NotificationManager mNotificationManager = (NotificationManager) getSystemService(ns);
int icon = R.drawable.launcher;
CharSequence tickerText = "Remind Me!";
long when = System.currentTimeMillis();
final Notification notification = new Notification(icon, tickerText, when);
notification.flags |= Notification.FLAG_AUTO_CANCEL | Notification.FLAG_NO_CLEAR;
final Context context = getApplicationContext();
CharSequence contentTitle = "Remind Me!";
CharSequence contentText = param1;
Intent notificationIntent = new Intent(context, Completed.class);
PendingIntent contentIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0);
notification.setLatestEventInfo(context, contentTitle, contentText, contentIntent);
mNotificationManager.notify(HELLO_ID, notification);
HELLO_ID++;
}
}

This is the expected result, as the Intent you create in your AlarmReceiver class explicitly launches your Note Activity.
Why not simply create the Notification in your AlarmReceiver? (rather than launching your activity)