Develop Reference

Run a task hourly in a service

I want to track the tower location of the user hourly. So for that I am now using an alarm manager. With alarm manager sometimes the alarm is getting triggered sometimes it does not.
Also there is problem in xiomi devices, if the app is killed from ram then the alarm does not trigger.
Is there any other way to do this? Can I run a service continuous and track the location hourly?
I want a solution where in a service I should be able to run this task hourly, may be using an handler or timer??
How can I use Job Scheduler for this?
Right Now my attempt with alarm manager :
public static boolean setAlarm(Context context) {
Calendar calendarNow = Calendar.getInstance();
Intent intent = new Intent(context, SaveLocationReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 1321, intent, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarmManager = (AlarmManager) context.getSystemService(ALARM_SERVICE);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendarNow.getTimeInMillis(), AlarmManager.INTERVAL_FIFTEEN_MINUTES, pendingIntent);
ComponentName receiver = new ComponentName(context, SaveLocationReceiver.class);
PackageManager pm = context.getPackageManager();
pm.setComponentEnabledSetting(receiver,
PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
PackageManager.DONT_KILL_APP);
return true;
}
SaveLocationReceiver.java:
public class SaveLocationReceiver extends BroadcastReceiver {
private SharedPreferences preferences;
String networkSubType="";
SessionData mSessionData;
#Override
public void onReceive(final Context context, Intent intent) {
Log.d("myapp", "service started");
mSessionData = new SessionData(context);
if(ContextCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED
&& ContextCompat.checkSelfPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED)
{
Calendar calendarSet = Calendar.getInstance();
Calendar calendarNow = Calendar.getInstance();
calendarSet.set(Calendar.HOUR_OF_DAY, 7); // hour
calendarSet.set(Calendar.MINUTE, 00); // minute
calendarSet.set(Calendar.SECOND, 0); // second
Calendar calendarEnd = Calendar.getInstance();
calendarEnd.set(Calendar.HOUR_OF_DAY, 20); // hour
calendarEnd.set(Calendar.MINUTE, 00); // minute
calendarEnd.set(Calendar.SECOND, 0); // second
SimpleDateFormat format1 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
System.out.println(calendarNow.getTime());
// Output "Wed Sep 26 14:23:28 EST 2012"
String currentTime = format1.format(calendarNow.getTime());
System.out.println(currentTime);
if (calendarNow.compareTo(calendarSet) >= 0 && calendarNow.compareTo(calendarEnd) <= 0) {
TelephonyManager telephonyManager = (TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);
GsmCellLocation cellLocation = (GsmCellLocation) telephonyManager.getCellLocation();
ConnectivityManager connectivityManager = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);//?????????
NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo();
if (cellLocation != null) {
int cellid = cellLocation.getCid();
int celllac = cellLocation.getLac();
if(activeNetInfo != null) {
networkSubType = activeNetInfo.getSubtypeName();
}
String networkOperator = telephonyManager.getNetworkOperator();
int mcc = Integer.parseInt(networkOperator.substring(0, 3));
int mnc = Integer.parseInt(networkOperator.substring(3));
String networkOperatorName = telephonyManager.getNetworkOperatorName();
int type = telephonyManager.getNetworkType();
Log.d("CellLocation", cellLocation.toString());
Log.d("GSM CELL ID", String.valueOf(cellid));
Log.d("GSM Location Code", String.valueOf(celllac));
Log.d("MCC", String.valueOf(mcc));
Log.d("MNC", String.valueOf(mnc));
Log.d("NetworkOperatorName", networkOperatorName);
Log.d("radioType", String.valueOf(type));
Log.d("Network subtype name", networkSubType);
AddLocationAsyncTask addLocationAsyncTask = new AddLocationAsyncTask(context);
addLocationAsyncTask.execute(mSessionData.getString("user_id",""), String.valueOf(cellid), String.valueOf(celllac), String.valueOf(mcc), String.valueOf(mnc),
networkOperatorName, networkSubType, currentTime);
}
}
}
}
}
So I want above task of fetching the location to run exactly after half an hour without miss for any reason.

Cannot cancel alarmmanager

I'm trying to create 3 notifications after the desired date and time is selected from a datepicker and a timepicker. I want to send notifications for the last 3 days for the selected value. But after the 3 notifications I want to cancel the notification process. I set up my pending notification and an alarm manager from my activity like
TimePickerDialog.OnTimeSetListener mTimeSetListener = new TimePickerDialog.OnTimeSetListener() {
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
//last 3 days add notification
Calendar calendar = Calendar.getInstance();
calendar.set(year, month, day, hourOfDay, minute, 0);
long when = calendar.getTimeInMillis();
when = when -3*(24*60*60*1000)+3000; //set startup time 3 days before
GetTime(when);
long diff = when - Calendar.getInstance().getTimeInMillis();
while (diff < 0){
when+= (24*60*60*1000); //increment 24h if selected time is closer then 3 days
diff = when - Calendar.getInstance().getTimeInMillis();
GetTime(when);
}
if (diff >0) {
Intent notifyIntent = new Intent(getApplicationContext() ,NotificationReceiver.class);
notifyIntent.putExtra("ctg", categorySelected);
PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), new Utils().getIdForCategory(categorySelected), notifyIntent, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, when, 60*1000, pendingIntent); //setting for testing purposes for 60 seconds
}
}
};
My receiver class is :
protected void onHandleIntent(Intent intent) {
String categorySelected = intent.getStringExtra("ctg");
SharedPreference pref = new SharedPreference(getApplicationContext());
int alarmCount = pref.getAlarmCount(categorySelected);
if (alarmCount<=3){
Log.d("alarmCount", String.valueOf(alarmCount));
pref.saveAlarmCount(categorySelected,alarmCount+1);
showNotification(intent);
}
else //we reached the 3 times
{
new Utils().clearAllPendingIntent(getApplicationContext(),categorySelected);
}
}
and my clear method
public void clearAllPendingIntent(Context context, String categorySelected){
AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
Intent notifyIntent = new Intent(context ,NotificationReceiver.class);
notifyIntent.putExtra("ctg",categorySelected);
PendingIntent pendingUpdateIntent = PendingIntent.getBroadcast(context, new Utils().getIdForCategory(categorySelected), notifyIntent, PendingIntent.FLAG_CANCEL_CURRENT);
SharedPreference pref = new SharedPreference(context);
pref.saveAlarmCount(categorySelected,1);
// Cancel alarms
try {
alarmManager.cancel(pendingUpdateIntent);
} catch (Exception e) {
}
}
My problem is that the pending intent is not canceled after 3 times, which means I get notification each minute. What am I doing wrong?

The actual problem was with my new Utils().getIdForCategory(categorySelected) function which should return a specific value based on the category.
public int getIdForCategory(String category){
if (category.equals("A")) return 1; //before it was category=="A"
if (category.equals("B")) return 2;
if (category.equals("C")) return 3;
if (category.equals("D")) return 4;
if (category.equals("E")) return 5;
return 0;
}

Alarm successfully sets for future time, but not for Calendar date

I have this app where i want to set a notification on a specific date the user defines. I saw lots of code and relative answers here on SO but for some reason nothing works so far.
In this test project i have 2 methods. One that sets an alarm to ring 5 seconds on future and one that assigns the desired date.
Problem:
If i set the alarm to a second delay it works fine. The notification is shown within 5 seconds after the alarm assignment. But if i use the method that passes a Calendar date, it does nothing. Not triggers no notification
MainActivity.java
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void setAlarmOnClick(View view){
// this method call works fine
setAlarm(getNotification("Date test"), 3000);
// this one doesn't
// setAlarm(getNotification("Date test"), getDate());
}
// Here nothing happens when the date comes
private void setAlarm(Notification notification, Calendar cal) {
Intent notificationIntent = new Intent(this, NotificationPublisher.class);
notificationIntent.putExtra(NotificationPublisher.NOTIFICATION_ID, 1);
notificationIntent.putExtra(NotificationPublisher.NOTIFICATION, notification);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT | Intent.FILL_IN_DATA);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(),pendingIntent );
Toast.makeText(this, "Alarm worked.", Toast.LENGTH_LONG).show();
}
// This alarm get successfully trigger here showing the notification
private void setAlarm(Notification notification, int delay) {
Intent notificationIntent = new Intent(this, NotificationPublisher.class);
notificationIntent.putExtra(NotificationPublisher.NOTIFICATION_ID, 1);
notificationIntent.putExtra(NotificationPublisher.NOTIFICATION, notification);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT | Intent.FILL_IN_DATA);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, delay, pendingIntent );
Toast.makeText(this, "Alarm worked.", Toast.LENGTH_LONG).show();
}
private Calendar getDate(){
Calendar cal=Calendar.getInstance();
cal.set(Calendar.MONTH,8);
cal.set(Calendar.YEAR,2017);
cal.set(Calendar.DAY_OF_MONTH,29);
cal.set(Calendar.HOUR_OF_DAY,11);
cal.set(Calendar.MINUTE,47);
return cal;
}
#TargetApi(Build.VERSION_CODES.JELLY_BEAN)
private Notification getNotification(String content) {
Notification.Builder builder = new Notification.Builder(this);
builder.setContentTitle("Scheduled Notification");
builder.setContentText(content);
builder.setSmallIcon(R.mipmap.ic_launcher);
return builder.build();
}
}
NotificationPublisher.java
public class NotificationPublisher extends BroadcastReceiver {
public static String NOTIFICATION_ID = "notification-id";
public static String NOTIFICATION = "notification";
public void onReceive(Context context, Intent intent) {
Toast.makeText(context, "Alarm worked.", Toast.LENGTH_LONG).show();
int id = intent.getIntExtra(NOTIFICATION_ID, 0);
NotificationManager notofManager = (NotificationManager)context. getSystemService(Context.NOTIFICATION_SERVICE);
Notification notification = intent.getParcelableExtra(NOTIFICATION);
notofManager.notify(id, notification);
}
}
I would really appreciate anykind of help!
P.S.
How can i be sure that an alarm was successfully set on a date. Even if a code works and a date is set a week form now. How can i test that it will trigger then? Obviously we can't wait a week to see that. Changing the device date is working? Thank you

Calendar month goes from 0-11 instead of 1-12 as u assumed.
So something like:
cal.set(Calendar.Month, 7 );
would set your calendar month to August.

Alarm Manager fail to Execute onReceive

I am having some problem with Alarm Manager in Android. I am setting the alarm manager to execute every midnight at 12am. Here are my codes:
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.HOUR_OF_DAY, 0 );
notificationCount = notificationCount + 1;
AlarmManager mgr = (AlarmManager) context
.getSystemService(Context.ALARM_SERVICE);
Intent notificationIntent = new Intent(context,
ReminderAlarm.class);
notificationIntent.putExtra("RecurID", recurID);
notificationIntent.putExtra("RecurStartDate", _recurlist.get(position)
.getRecurringStartDate());
notificationIntent.putExtra("Date", dateFormat.format(new Date()));
notificationIntent.putExtra("Type", _recurlist.get(position).getRecurringType());
notificationIntent.putExtra("Amount", formatAmount);
notificationIntent.putExtra("NextPaymentDate", viewHolder.txt_ddate.getText());
notificationIntent.putExtra("NotifyCount", notificationCount);
PendingIntent pi = PendingIntent.getBroadcast(context,
notificationCount, notificationIntent,
PendingIntent.FLAG_UPDATE_CURRENT);
mgr.setInexactRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
AlarmManager.INTERVAL_DAY, pi);
ComponentName receiver = new ComponentName(context, BootReceiver.class);
PackageManager pm = context.getPackageManager();
pm.setComponentEnabledSetting(receiver,
PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
PackageManager.DONT_KILL_APP);
return convertView;
And when onReceive, the program will execute the insert and update SQL statement if it matches the conditions:
ReminderAlarm class
public void onReceive(Context context, Intent intent) {
SimpleDateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy");
String recurID = intent.getStringExtra("RecurID");
String recurStartDate = intent.getStringExtra("RecurStartDate");
String date = intent.getStringExtra("Date");
String type = intent.getStringExtra("Type");
String amount = intent.getStringExtra("Amount");
String nextPaymentDate = intent.getStringExtra("NextPaymentDate");
String currentDate = "Next Payment On: "
+ dateFormat.format(new Date());
// If dates match then execute the SQL statements
if (currentDate.equals(nextPaymentDate)) {
DatabaseAdapter mDbHelper = new DatabaseAdapter(
context.getApplicationContext());
mDbHelper.createDatabase();
mDbHelper.open();
TransactionRecModel trm = new TransactionRecModel();
CategoryController cc = new CategoryController(mDbHelper.open());
trm.setDate(date);
trm.setTransDescription(description);
trm.setType(type);
trm.setAmount(Float.parseFloat(amount));
// Get the categoryID based on categoryName
String catID = cc.getCatIDByName(categoryName);
trm.setCategory(catID);
// Check if the recurring record exists before insert new
// transaction record
RecurringController rc1 = new RecurringController(mDbHelper.open());
boolean recurExist = rc1.checkRecurExist(recurStartDate,
description, catID);
if (recurExist == true) {
TransactionRecController trc = new TransactionRecController(
mDbHelper.open());
// Check if the transaction record exists to prevent duplication
boolean moveNext = trc.checkTransExist(trm);
if (moveNext == false) {
if (trc.addTransactionRec(trm)) {
// Update recurring start date after insertion of
// transaction
RecurringModel rm = new RecurringModel();
rm.setRecurringID(recurID);
rm.setRecurringStartDate(date);
RecurringController rc = new RecurringController(
mDbHelper.open());
if (rc.updateRecurringDate(rm)) {
mDbHelper.close();
}
}
}
}
}
In my manifest file:
<receiver android:name="ReminderAlarm"></receiver>
<receiver
android:name="BootReceiver"
android:enabled="false" >
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" >
</action>
</intent-filter>
</receiver>
Boot Receiver class:
public void onReceive(Context context, Intent i) {
scheduleAlarms(context);
}
static void scheduleAlarms(Context context) {
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 1);
AlarmManager mgr = (AlarmManager) context
.getSystemService(Context.ALARM_SERVICE);
Intent notificationIntent = new Intent(context, ReminderAlarm.class);
PendingIntent pi = PendingIntent.getService(context, 0,
notificationIntent, 0);
mgr.setInexactRepeating(AlarmManager.RTC_WAKEUP,
calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY, pi);
}
However, the alarm manager does not execute when it get passed 12am everyday. The insert and update SQL statement will only be execute when I run the applications.
Any ideas? Thanks in advance.

Problem is in setting time for alarm to execute. replace the top three lines with this code
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 1);

Change your calendar value to Calendar calendar = Calendar.getInstance();
calendar .set(Calendar.HOUR_OF_DAY, 0);
calendar .set(Calendar.MINUTE, 0);
calendar .set(Calendar.SECOND, 0); and set alarm.

Alarm Manager is running immediately

Date dat = new Date();
Calendar cal_alarm = Calendar.getInstance();
Calendar cal_now = Calendar.getInstance();
cal_alarm.setTime(dat);
cal_alarm.set(Calendar.HOUR_OF_DAY, hrs);// set the alarm time
cal_alarm.set(Calendar.MINUTE, min);
cal_alarm.set(Calendar.SECOND, 0);
cal_alarm.set(Calendar.MILLISECOND, 0);
if (cal_alarm.before(cal_now)) {// if its in the past increment
cal_alarm.add(Calendar.DATE, 1);
}
Intent intent = new Intent(ctx, AlarmReceiver.class);
// intent.putExtra("Reminder to Take Photo", "Pixitch!");
PendingIntent sender = PendingIntent.getBroadcast(ctx, 0010000,
intent, 0);
// Get the AlarmManager service
long tmemills = cal_alarm.getTimeInMillis()
- cal_now.getTimeInMillis();
AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
am.setRepeating(AlarmManager.RTC_WAKEUP, tmemills,
AlarmManager.INTERVAL_DAY, sender);
Alarm Receiver Class
public class AlarmReceiver extends BroadcastReceiver {
private static final int MY_NOTIFICATION_ID = 1;
private NotificationManager notificationManager;
private Notification myNotification;
// Context ctx = this;
#SuppressWarnings("deprecation")
#Override
public void onReceive(Context context, Intent intent) {
try {
NotificationManager mNM;
mNM = (NotificationManager) context
.getSystemService(Context.NOTIFICATION_SERVICE);
Notification notification = new Notification(
R.drawable.ic_launcher, "Pixitch Notification !",
System.currentTimeMillis());
PendingIntent contentIntent = PendingIntent.getActivity(context, 0,
new Intent(context, AlarmManage.class), 0);
// Set the info for the views that show in the notification panel.
notification.setLatestEventInfo(context, "Pixitch Notification!",
"Reminder For TakePhoto", contentIntent);
mNM.notify(0, notification);
} catch (Exception e) {
Toast.makeText(
context,
"There was an error somewhere, but we still received an alarm",
Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
}
}
the value of tmemills is 278,088
the tmemills is around 4.5 minutes but
the alarm Manager is Running immediately
I am not able to find where the problem is because I am beginner for Android. please help me

Try this:
am.setRepeating(AlarmManager.RTC_WAKEUP, tmemills + System.currentTimeMillis(),
AlarmManager.INTERVAL_DAY, sender);

Get rid of tmemills. Use cal_alarm.getTimeInMillis() as the second parameter to your set() call on AlarmManager, as that is the number of milliseconds since the Unix epoch at which you want the event to occur.