Get updated id from entity autogenerate primary key - kotlin

Question

I created Alarm class and annotate it as Entity on Android Studio.
In this class I have put id variable as Entity Primary Key and it is auto generate.
#Entity(tableName = "alarm_data_table")
class Alarm(
#ColumnInfo(name = "alarm_hour")
var alarmHour: Int,
#ColumnInfo(name = "alarm_min")
var alarmMin: Int,
#ColumnInfo(name = "is_am")
var isAM: Boolean,
var days: ArrayList<Int>?,
#ColumnInfo(name = "is_on")
var isOn: Boolean,
var label: String,
#PrimaryKey(autoGenerate = true)
val id: Int = 0
) {
fun setAlarmSchOnOff(isOn: Boolean, activity: Activity){
if (isOn){setAlarmScheduleOn(activity)}
if (!isOn){setAlarmScheduleOff(activity)}
}
fun setAlarmScheduleOn (activity: Activity) {
val alarmManager = activity.getSystemService(Context.ALARM_SERVICE) as AlarmManager
Log.d("ALARM ON", Integer.toString(id))
val alarmIntent = Intent(activity, AlarmReceiver::class.java).let { intent ->
intent.putExtra(Constants().ALARM_LABEL_KEY,label)
PendingIntent.getBroadcast(
activity,
id,
intent,
PendingIntent.FLAG_UPDATE_CURRENT
)
}
val calendar: Calendar = Calendar.getInstance().apply {
timeInMillis = System.currentTimeMillis()
set(Calendar.HOUR_OF_DAY, alarmHour)
set(Calendar.MINUTE, alarmMin)
}
days?.let {
it.forEach {
calendar.set(Calendar.DAY_OF_WEEK, it) }
alarmManager.setInexactRepeating(
AlarmManager.RTC_WAKEUP,
calendar.timeInMillis,
AlarmManager.INTERVAL_HOUR,
alarmIntent
)
} ?:run{
alarmManager.set(
AlarmManager.RTC_WAKEUP,
calendar.timeInMillis,
alarmIntent)
}
}
fun setAlarmScheduleOff(activity: Activity) {
val alarmManager = activity.getSystemService(Context.ALARM_SERVICE) as AlarmManager
Log.d("ALARM OFF", Integer.toString(alarmId))
val alarmIntent = Intent(activity, AlarmReceiver::class.java).let { intent ->
PendingIntent.getBroadcast(
activity,
id,
intent,
PendingIntent.FLAG_UPDATE_CURRENT
)}
alarmManager.cancel(alarmIntent)
}
}
The problem is every time I tried to retrieve id for setAlarm method it will always return 0.
2019-10-30 15:38:07.441 11066-11066/com.andreasgift.myclock D/ALARM ON: 0
Is there any way to return the id value after Entity update the value/ successfully insert it into table.

Answer 1

Is there any way to return the id value after Entity update the value/
successfully insert it into table
Change to use (optional)
:-
#PrimaryKey(autoGenerate = true)
var id: Long = 0 /*<<<<<<<<<< var not val + Long instead of Int */
you should really use Long for id columns as
a) the SQliteDatabase insert method that is ultimately used, returns a long and
b) (which is why a is as it is)) a rowid (which is effectively what autogenerate uses ) can be a value larger then an Int can hold (i.e. a 64 bit signed integer).
If you wanted to use Int for id then you could use myAlarm.id = (alarmDao.insertAlarm(myAlarm)).toInt() instead of myAlarm.id = alarmDao.insertAlarm(myAlarm)
And use a Dao
#Insert
fun insertAlarm(alarm :Alarm) :Long
i.e. set it so that it returns :Long
The insert now returns the id (or -1 if the insert didn't insert the row). If you still use the Alarm object after the insert then you could use something like :-
myAlarm.id = alarmDao.insertAlarm(myAlarm) /*<<<<<<<<<< SET THE id according to the inserted id */