We Keep Coding

Unable to send Automatic Text Messages

I'm working on a Project that takes a date and time and automatically sends a pre-written message on that day to the specified Mobile number.
I'm using alarm Manager for this, but it's not working. I've been trying to debug my program for so long that I'm unable to see what's exactly wrong.
final Calendar c = Calendar.getInstance();
String date=releaseDateEditText.getText().toString();
String data[]= date.split("-");
c.set(Calendar.DAY_OF_MONTH, Integer.parseInt(data[0]));
c.set(Calendar.MONTH,Integer.parseInt(data[1]));
c.set(Calendar.YEAR,Integer.parseInt(data[2]));
c.set(Calendar.AM_PM, Calendar.PM);
c.set(Calendar.HOUR_OF_DAY, 11);
c.set(Calendar.MINUTE, 18);
c.set(Calendar.SECOND, 0);
Intent _myIntent = new Intent(getApplicationContext(), message.class);
_myIntent.putExtra("name", name.getText());
_myIntent.putExtra("agency", agency.getText());
_myIntent.putExtra("book", bookingDateEditText.getText());
_myIntent.putExtra("release", releaseDateEditText.getText());
pintent = PendingIntent.getBroadcast(getApplicationContext(), 1, _myIntent, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, c.getTimeInMillis(), pintent);
Toast.makeText(getApplicationContext(), "Alarm set for " + releaseDateEditText.getText(), Toast.LENGTH_LONG).show();
public class message extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
String SPhone = "Phonenumber";
String SSms = intent.getStringExtra("name");
SSms = SSms + "\n" + intent.getStringExtra("agency") + "\n" + intent.getStringExtra("book") + "\n" + intent.getStringExtra("release");
SmsManager smsManager = SmsManager.getDefault();
smsManager.sendTextMessage(SPhone, null, SSms, null, null);
}
}

If you go through Use of SMS or Call Log permission groups, you will find that from DEC 2018 onwards, apps using permissions to SEND_SMS are not allowed on playstore, unless they are default SMS/Dialer app. Either you will have to file your app as exception or remove the SMS permissions.
For apps requesting access to the SMS or Call Log permissions, the intended and permitted uses include default SMS handling, default phone handling, or Assistant handling capability.
Apps must be actively registered as the default SMS, Phone, or Assistant handler before prompting users to accept any of the above permissions and must immediately stop the use of the permission when they no longer are the default handler.
ANSWER TO QUESTION:
Well, coming back to your question, many android device manufacturers are using aggressive policies to save battery. When a user clears his/her app from recent tabs, the app is force closed, thus cancelling all alarms,broadcastReceivers,services etc. This happens in most of the device manufacturers like OnePlus,Huwaei, Xiaomi, Vivo, Oppo etc.
They have AutoStartManagers/AutoLaunchManagers that prevent the background running of the apps. You will have to white list your app using steps mentioned in THIS SO ANSWER.

How do I know the number of seconds remaining until the alarm goes off?

Scenario
i am developing an app that works kind of like subscription, i start an alarm manager for days, suppose the alarm manager has started yesterday and it should go off tomorrow, how do i know exact time remaining till alarm manager goes off?
// ALARM_MANAGER setting to expired
SharedPreferences alarmpreferences = PreferenceManager.getDefaultSharedPreferences(this);
SharedPreferences.Editor alarmEditor = alarmpreferences.edit();
alarmEditor.putString("ALARM_MANAGER", "active");
alarmEditor.apply();
AlarmManager service = (AlarmManager) getApplicationContext()
.getSystemService(getApplicationContext().ALARM_SERVICE);
Intent i = new Intent(getApplicationContext(), MyReceiver.class);
i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pending = PendingIntent.getBroadcast(getApplicationContext(), mainAlarmRequestCode, i,
PendingIntent.FLAG_CANCEL_CURRENT);
Calendar cal = Calendar.getInstance();
// Start 20 seconds after boot completed
int secondTime = Integer.parseInt(expireTime)*60;
cal.add(Calendar.SECOND, secondTime);
//
// Fetch every 20 seconds
// InexactRepeating allows Android to optimize the energy consumption
service.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), pending);
I check to see if the alarm manager is running in the 0 background with this method.
Intent i = new Intent(getApplicationContext(), MyReceiver.class);
i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
boolean alarmUp = (PendingIntent.getBroadcast(getApplicationContext(), mainAlarmRequestCode, i, PendingIntent.FLAG_NO_CREATE) != null);
if (alarmUp) {
Log.d("myTag", "Alarm is already active");
Toast.makeText(this, "alarm manager is active!", Toast.LENGTH_SHORT).show();
//alarm is active check alarm manager counter time
} else {
Toast.makeText(this, "alarm manager is not active!", Toast.LENGTH_SHORT).show(); }
The alarm manager is active, but how do I know the number of seconds remaining until the alarm goes off?
Any help would be appreciated!

You can try to store the expiration date of your AlarmManager and run a test at regular interval, to check if the current date is greater than the expiration one.

Set multiple alarms using request code

I wanna set multiple alarm using request code.
I give different values of the request codes to each alarm, but the alarmManager still executes only the last set alarm.
Here's my existing code:
public void Alarm(){
Intent intent = new Intent(MainActivity.this, BroadCast.class);
alarmID = (int)(System.currentTimeMillis() % 1000000000); //for request code
PendingIntent sender = PendingIntent.getBroadcast(
MainActivity.this, alarmID, intent, 0);
Calendar calendar = Calendar.getInstance();
calendar.set(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH),
calendar.get(Calendar.DATE),hours,mins,0);
AlarmManager am = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
am.setInexactRepeating(AlarmManager.RTC_WAKEUP,
calendar.getTimeInMillis(),am.INTERVAL_DAY, sender);
}

try setRepeating instead of setInexactRepeating you will get repeating alarm.
am.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis()
+ (5 * 1000),5 * 1000, pendingIntent);

As of Android 5.1 (API version 22) there is a minimum period of 1 minute for repeating alarms. If you need to do work within one minute, just set the alarm directly, then set the next one from that alarm's handler, etc. If you need to do work within 5 seconds (for example), post it to a Handler instead of using the AlarmManager.
Good documetion here :
https://en.proft.me/2017/05/7/scheduling-operations-alarmmanager-android/

Android notification showing some weird date in a corner

I'm not sure why when I'm showing notification there is some 1/4/70 date displaying in a top right corner? What is that? How do I get rid of it?
Code:
public static void showNotification(int id, String message, String title, String body)
{
int drawable = 0;
switch (id)
{
case NOTIFICATION_NEW_MAIL:
drawable = R.drawable.ic_notify_mail;
break;
case NOTIFICATION_AVAILABLE_TRIPS:
drawable = R.drawable.ic_notify_trip;
break;
}
NotificationManager notifyManager = (NotificationManager)MyApplication.Me.getSystemService(Context.NOTIFICATION_SERVICE);
Notification notification = new Notification(drawable, message, SystemClock.elapsedRealtime() + 1000);
notification.defaults |= Notification.DEFAULT_SOUND;
Intent notificationIntent= new Intent(MyApplication.Me, MailListActivity.class);
switch (id)
{
case NOTIFICATION_NEW_MAIL:
notificationIntent = new Intent(MyApplication.Me, MailListActivity.class);
break;
case NOTIFICATION_AVAILABLE_TRIPS:
notificationIntent = new Intent(MyApplication.Me, TripListActivity.class);
break;
}
PendingIntent contentIntent = PendingIntent.getActivity(MyApplication.Me, 0, notificationIntent, 0);
notification.setLatestEventInfo(MyApplication.Me, title, body, contentIntent);
notifyManager.notify(id, notification);
}
Screenshot:

That notification constructor is apparently deprecated, but anyway the last parameter in that constructor, when, should refer to in unix time what time the notification was created. SystemClock.getEllapsed time returns the amount of time since the system was booted http://developer.android.com/reference/android/os/SystemClock.html. E.g. in your case, you're saying the notication was created very recently, but in unix time you're saying you're really close to 1970. Use System.getCurrentTimeMillis() instead.
EDIT: By close to 1970 I mean Unix time is measured in milliseconds from the start of 1970. So if you say 0ms you're saying Jan 1. If you pass in 86,400,000ms (ms in a day) you're saying Jan 2, 1970. By passing in the elapsed time since boot, it'll probably report you as a day or two from Jan 1, 1970. See http://en.wikipedia.org/wiki/Unix_time

Whats that SystemClock thing? What's wrong with using System.currentTimeMillis() or System.nanoTime() ?
also, try to write a toClock() function that will convert it to a 12hr/24hr formatted time string. again, more on monday (sample code available) when i get back to the office.

I think your means is that:
Calendar canlender = Calendar.getInstance();
canlender.setTimeInMillis(System.currentTimeMillis());
canlender.add(Calendar.MILLISECOND, 1000);
long TimeInMillised = canlender.getTimeInMillis();
Notification notification = new Notification(drawable, message, TimeInMillised);
try it!

Android AlarmManager problem

I'm a new developer android application.I've problem about AlarmManager,I using
AlarmManager to set alert for my application.
I was set time to alert 2 time but my application was alert a one time
example,I'll set alarm at 15.30 and 16.30,My application will alert at 16.30 but not alert at 15.30.I've no idea to fix this problem,I hope someone please tell me to fix this problem
This my code
confirmButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
alarm();
finish();
}
});
This alarm method,I'll get date and time from button and use it to set calendar
private void alarm(){
final String day = mBtnselectDate.getText().toString();
final String time = mBtnselectTime.getText().toString();
y = day.substring(0, 4);
m = day.substring(5, 7);
d = day.substring(8);
ALARM_HOUR = time.substring(0, 2);
ALARM_MINUTE = time.substring(3);
year = Integer.parseInt(y);
month = Integer.parseInt(m);
mon = month - 1;
date = Integer.parseInt(d);
Hour = Integer.parseInt(ALARM_HOUR);
Min = Integer.parseInt(ALARM_MINUTE);
Intent AlarmIntent = new Intent(Organaizer2.this, AlarmReceiver2.class);
AlarmManager AlmMgr = (AlarmManager)getSystemService(ALARM_SERVICE);
PendingIntent Sender = PendingIntent.getBroadcast(Organaizer2.this, 0, AlarmIntent, 0);
Calendar alarmCalendar = Calendar.getInstance();
alarmCalendar.set(Calendar.HOUR_OF_DAY, Hour);
alarmCalendar.set(Calendar.MINUTE, Min);
alarmCalendar.set(Calendar.YEAR, year);
alarmCalendar.set(Calendar.MONTH, mon);
alarmCalendar.set(Calendar.DATE, date);
AlmMgr.set(AlarmManager.RTC_WAKEUP, alarmCalendar.getTimeInMillis(), Sender);
}
if you see problem please tell me,Thank you,Arles

Your second alarm is replacing the first alarm, because both use equivalent Intent objects. Add a call to setAction() on your AlarmIntent (BTW, recommended Java style is lowercase first letters for variables) to set a unique action string. You can also try providing a different request code (the first 0 in your call to getBroadcast()), though that parameter is not well documented and I am not sure if it will give you distinct alarms or not.