Develop Reference

Notifications fired at app start

I want to make an app that sends scheduled notifications every day according to specific times inserted by the user.
The problem is that when I launch the app I get one or two notifications randomly and I don't receive them at the set time.
Here is my setAlarm() function called when the user clicks a button:
public void setAlarm()
{
String mName = NameFld.getText().toString();
String mFormat = FormatSpn.getSelectedItem().toString();
Date date = new Date();
Calendar calendar = new GregorianCalendar();
Calendar current = new GregorianCalendar();
current.setTime(date);
calendar.setTime(date);
calendar.set(Calendar.HOUR_OF_DAY, picker_hour);
calendar.set(Calendar.MINUTE, picker_minute);
calendar.set(Calendar.SECOND, 0);
if(current.before(calendar))
{
calendar.add(Calendar.DATE, 1);
}
medName = mName; // Used to build the notification (it doesn't matter for now).
medFormat = mFormat; // Used to build the notification (it doesn't matter for now).
long when = calendar.getTimeInMillis();
Intent intent = new Intent(AddMedicine.this, AlarmReceiver.class);
final int _id = (int) System.currentTimeMillis(); // PendingIntent id.
PendingIntent pIntent = PendingIntent.getBroadcast(AddMedicine.this, _id, intent, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager aManager = (AlarmManager) getSystemService(ALARM_SERVICE);
aManager.set(AlarmManager.RTC_WAKEUP, when, pIntent);
}
And here is my BroadcastReceiver class:
public class AlarmReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
String[] data = AddMedicine.getData(); // Used to build the notification (it doesn't matter for now).
// Notification building.
NotificationCompat.Builder builder = new NotificationCompat.Builder(context);
builder.setAutoCancel(true);
builder.setTicker("It's pill time!");
builder.setContentTitle(data[0]);
builder.setContentText(data[1]);
builder.setSmallIcon(R.drawable.ic_launcher);
Notification notification = builder.build();
NotificationManager nManager = (NotificationManager) context.getSystemService(context.NOTIFICATION_SERVICE);
nManager.notify(0, notification);
Log.i("NOTIFICATION", "The notification has been fired."); // Used to see if the alarm ha really been received.
}}
Can anyone elaborate something to fix this up? Thank you in advance for any help!

Show status bar notification in certain time

I want to show the user notifications everyday in the same time. For now I only have this code:
My TimeAlarm.class that shows the notifications:
public class TimeAlarm extends BroadcastReceiver {
NotificationManager nm;
#Override
public void onReceive(Context context, Intent intent) {
nm = (NotificationManager) context
.getSystemService(Context.NOTIFICATION_SERVICE);
CharSequence from = "Nithin";
CharSequence message = "Crazy About Android...";
PendingIntent contentIntent = PendingIntent.getActivity(context, 0,
new Intent(), 0);
Notification notif = new Notification(R.drawable.ic_launcher,
"Crazy About Android...", System.currentTimeMillis());
notif.setLatestEventInfo(context, from, message, contentIntent);
notif.sound = Uri.parse("android.resource://"
+ context.getPackageName() + "/" + R.raw.test);
// r.play();
nm.notify(1, notif);
}
}
And initialization of the notifications to show every 5 seconds:
public void setRepeatingAlarm() {
Intent intent = new Intent(this, TimeAlarm.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0,
intent, PendingIntent.FLAG_CANCEL_CURRENT);
am.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(),
(5 * 1000), pendingIntent);
}
Now my question is how should I modify this code to set the notification to repeat every day in certain time. Example every day in 14:36 o'clock?

The easy-but-inexact way is to change System.currentTimeMillis() to a calculation of 14:36 tomorrow, probably using a Calendar object:
Calendar cal=Calendar.getInstance();
cal.set(Calendar.HOUR_OF_DAY, 14);
cal.set(Calendar.MINUTE, 36);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MILLISECOND, 0);
if (cal.getTimeInMillis() < System.currentTimeMillis()) {
cal.add(Calendar.DAY_OF_YEAR, 1);
}
I say "easy-but-inexact" because Android 4.4 has changed the behavior of setRepeating() to be inexact, once your android:targetSdkVersion is 19 or higher. If you need exact alarms, you will need to use setExact() and do your own "repeating" (by calling setExact() again when the alarm goes off). You would still use the same Calendar sort of calculation, just on every setExact() call.

Android alarm launching new activity and resetting the alarm

I have been searching for this since morning and referred to most of the android alarm problems on stackoverflow.
I am trying to set multiple alarms with different intents. On receiving the the alarm, I want the alarm to be cancelled and the activity to come in front, in case its already running, or start again if it was killed, but this time the alarm shouldnt be set again. I dont want the other alarms to be effected.
Currently, the problem is that clicking on the notification starts the activity again and resets the alarm. If I try to cancel it using alarmmanager.cancel, it doesnt notify the user at all.
Here is my code, please help
My MainActivity thats sets multiple alarms
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Calendar cal = Calendar.getInstance(); //for using this you need to import java.util.Calendar;
// add minutes to the calendar object
cal.set(Calendar.DAY_OF_WEEK,Calendar.MONDAY);
cal.set(Calendar.HOUR_OF_DAY, 22);
cal.set(Calendar.MINUTE, 8);
// cal.add(Calendar.MINUTE, 1);
AlarmManager mgrAlarm = (AlarmManager) this.getSystemService(ALARM_SERVICE);
ArrayList<PendingIntent> intentArray = new ArrayList<PendingIntent>();
for(int i = 0; i < 10; ++i)
{
Intent intent = new Intent(this, AlarmReceiver.class);
intent.putExtra("title", "notification no."+String.valueOf(i));
intent.putExtra("NOTIFICATION_ID", String.valueOf(i));
// Loop counter `i` is used as a `requestCode`
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, i, intent, 0);
// Single alarms in 1, 2, ..., 10 minutes (in `i` minutes)
mgrAlarm.set(AlarmManager.ELAPSED_REALTIME_WAKEUP,
SystemClock.elapsedRealtime() + 60000 * i,
pendingIntent);
intentArray.add(pendingIntent);
}
}
My AlarmReceiver Class
public class AlarmReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
NotificationManager manger = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
Notification notification = new Notification(R.drawable.ic_launcher, "Alarm App", System.currentTimeMillis());
Bundle extras=intent.getExtras();
String title=extras.getString("title");
int notif_id=Integer.parseInt(extras.getString("NOTIFICATION_ID"));
//here we get the title and description of our Notification
Class myclass = MainActivity.class;
PendingIntent contentIntent = PendingIntent.getActivity(context, notif_id,
new Intent(context, MainActivity.class), 0);
String note=extras.getString("note");
notification.setLatestEventInfo(context, note, title, contentIntent);
notification.flags = Notification.FLAG_INSISTENT;
notification.defaults |= Notification.DEFAULT_SOUND;
//here we set the default sound for our
//notification
// The PendingIntent to launch our activity if the user selects this notification
manger.notify(notif_id, notification);
}
};

In your MainActivity, you can differentiate a launch from the Notification with an additional parameter in the intent. You would anyway need the notification id to cancel the particular notification. So, you can try the following in your MainActivity
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Intent appIntent = this.getIntent();
int notif_id = appIntent.getIntExtra( "my_notification_id", -1 ) ;
if( notif_id != -1 )
{
Log.d ( "LOG_TAG", "Launched from Notification ");
NotificationManager nm = (NotificationManager) getSystemService( NOTIFICATION_SERVICE );
nm.cancel( notif_id );
/* Do the separate processing here */
.....
}
else
{
/* Your previous onCreate code goes here */
In the file AlarmReceiver.java, you need to make the following changes
//PendingIntent contentIntent = PendingIntent.getActivity(context, notif_id, new Intent(context, MainActivity.class), 0);
Intent appIntent = new Intent( context, MainActivity.class );
appIntent.putExtra( "my_notification_id", notif_id );
PendingIntent contentIntent = PendingIntent.getActivity(context, notif_id, appIntent, 0);
Hope this helps.

How to check date from sqlite database?

I have sqlite database table which contacts friend and his contacts with date of birth.I want to ring Alarm when any date match from database with current date.Please Anyone help me How I do this task.
Actually I want to Match date 2 time a day daily please suggest me.
I am using this code
private void setAlarm(String name,String date)
{
String[] arrdob =date.split("/");
Calendar cal = Calendar.getInstance(); //for using this you need to import java.util.Calendar;
// add minutes to the calendar object
cal.set(Calendar.MONTH,Integer.parseInt(arrdob[1]));
cal.set(Calendar.YEAR, Integer.parseInt(arrdob[2]));
cal.set(Calendar.DAY_OF_MONTH,Integer.parseInt(arrdob[0]));
cal.set(Calendar.HOUR_OF_DAY,14);
cal.set(Calendar.MINUTE,35);
System.out.println("1");
Intent alarmintent = new Intent(getApplicationContext(), AlarmReceiver.class);
alarmintent.putExtra("title","B'Day Alarm");
alarmintent.putExtra("subject","Hi!Todays "+name+" B'Day");
PendingIntent sender = PendingIntent.getBroadcast(getApplicationContext(), HELLO_ID,
alarmintent,PendingIntent.FLAG_UPDATE_CURRENT | Intent.FILL_IN_DATA);
//VERY IMPORTANT TO SET FLAG_UPDATE_CURRENT... this will send correct extra's informations to
//AlarmReceiver Class
// Get the AlarmManager service
AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
am.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), sender);
}
call this method at when insert value into database.
AlarmReceiver class is as:
private static int NOTIFICATION_ID = 1;
#Override
public void onReceive(Context context, Intent intent) //
{
// NotificationManager mNotificationManager =
System.out.println("2");
//context.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");
//here we get the title and description of our Notification
String note=extras.getString("subject");
notification.setLatestEventInfo(context, note, title, contentIntent);
notification.flags = Notification.FLAG_INSISTENT;
notification.defaults |= Notification.DEFAULT_SOUND;
//here we set the default sound for our
//notification
// The PendingIntent to launch our activity if the user selects this notification
manger.notify(NOTIFICATION_ID++, notification);
}

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)