variable initialized in Kotlin
in this class below there is two Dates StartDate && EndDate i give them Values in
fun check_date() but in fun DateIsChecked() when i try to print the two Values it print null Why?
i try to use lateinit but it did not work
companion object {
//Today Date
var today = Calendar.getInstance().time
//Date Format
val sdf = SimpleDateFormat("yyyy/MM/dd")
var calender = Calendar.getInstance()
//Dates Of Plan
var StartDate: java.util.Date? = null
var EndDate: java.util.Date? = null
//Int Value Fore Loop
var i = 0
}
//Check Plan Dates in Database
fun check_date(){
var Ref = FirebaseDatabase.getInstance().reference
Ref.keepSynced(true)//Enable Data Synced
Ref.child("Plan").addListenerForSingleValueEvent(object : ValueEventListener {
override fun onCancelled(p0: DatabaseError) {
TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
}//End onCancelled
override fun onDataChange(p0: DataSnapshot){
for (date in p0.children) {
var item = date.getValue(Date::class.java)
if (i == 0) {
i = 1
calender.time = sdf.parse(item!!.Date)
EndDate = calender.time
} else {
i = 0
calender.time = sdf.parse(item!!.Date)
StartDate = calender.time
}//End else
}//End For
}//End onDataChange
})//End addValueEventListener
}//End
//Chick in Today Date In Date Range And Return The Result: Boolean
open fun DateIsChecked(): Boolean{
check_date()
Log.e("Date",today.toString())
Log.e("Date", StartDate.toString())
Log.e("Date", EndDate.toString())
return true
}
android kotlin
add a comment |
in this class below there is two Dates StartDate && EndDate i give them Values in
fun check_date() but in fun DateIsChecked() when i try to print the two Values it print null Why?
i try to use lateinit but it did not work
companion object {
//Today Date
var today = Calendar.getInstance().time
//Date Format
val sdf = SimpleDateFormat("yyyy/MM/dd")
var calender = Calendar.getInstance()
//Dates Of Plan
var StartDate: java.util.Date? = null
var EndDate: java.util.Date? = null
//Int Value Fore Loop
var i = 0
}
//Check Plan Dates in Database
fun check_date(){
var Ref = FirebaseDatabase.getInstance().reference
Ref.keepSynced(true)//Enable Data Synced
Ref.child("Plan").addListenerForSingleValueEvent(object : ValueEventListener {
override fun onCancelled(p0: DatabaseError) {
TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
}//End onCancelled
override fun onDataChange(p0: DataSnapshot){
for (date in p0.children) {
var item = date.getValue(Date::class.java)
if (i == 0) {
i = 1
calender.time = sdf.parse(item!!.Date)
EndDate = calender.time
} else {
i = 0
calender.time = sdf.parse(item!!.Date)
StartDate = calender.time
}//End else
}//End For
}//End onDataChange
})//End addValueEventListener
}//End
//Chick in Today Date In Date Range And Return The Result: Boolean
open fun DateIsChecked(): Boolean{
check_date()
Log.e("Date",today.toString())
Log.e("Date", StartDate.toString())
Log.e("Date", EndDate.toString())
return true
}
android kotlin
1
They're only going to be assigned if whatever is in yourPlan
reference actually changes.
– TheWanderer
Nov 23 '18 at 13:28
add a comment |
in this class below there is two Dates StartDate && EndDate i give them Values in
fun check_date() but in fun DateIsChecked() when i try to print the two Values it print null Why?
i try to use lateinit but it did not work
companion object {
//Today Date
var today = Calendar.getInstance().time
//Date Format
val sdf = SimpleDateFormat("yyyy/MM/dd")
var calender = Calendar.getInstance()
//Dates Of Plan
var StartDate: java.util.Date? = null
var EndDate: java.util.Date? = null
//Int Value Fore Loop
var i = 0
}
//Check Plan Dates in Database
fun check_date(){
var Ref = FirebaseDatabase.getInstance().reference
Ref.keepSynced(true)//Enable Data Synced
Ref.child("Plan").addListenerForSingleValueEvent(object : ValueEventListener {
override fun onCancelled(p0: DatabaseError) {
TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
}//End onCancelled
override fun onDataChange(p0: DataSnapshot){
for (date in p0.children) {
var item = date.getValue(Date::class.java)
if (i == 0) {
i = 1
calender.time = sdf.parse(item!!.Date)
EndDate = calender.time
} else {
i = 0
calender.time = sdf.parse(item!!.Date)
StartDate = calender.time
}//End else
}//End For
}//End onDataChange
})//End addValueEventListener
}//End
//Chick in Today Date In Date Range And Return The Result: Boolean
open fun DateIsChecked(): Boolean{
check_date()
Log.e("Date",today.toString())
Log.e("Date", StartDate.toString())
Log.e("Date", EndDate.toString())
return true
}
android kotlin
in this class below there is two Dates StartDate && EndDate i give them Values in
fun check_date() but in fun DateIsChecked() when i try to print the two Values it print null Why?
i try to use lateinit but it did not work
companion object {
//Today Date
var today = Calendar.getInstance().time
//Date Format
val sdf = SimpleDateFormat("yyyy/MM/dd")
var calender = Calendar.getInstance()
//Dates Of Plan
var StartDate: java.util.Date? = null
var EndDate: java.util.Date? = null
//Int Value Fore Loop
var i = 0
}
//Check Plan Dates in Database
fun check_date(){
var Ref = FirebaseDatabase.getInstance().reference
Ref.keepSynced(true)//Enable Data Synced
Ref.child("Plan").addListenerForSingleValueEvent(object : ValueEventListener {
override fun onCancelled(p0: DatabaseError) {
TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
}//End onCancelled
override fun onDataChange(p0: DataSnapshot){
for (date in p0.children) {
var item = date.getValue(Date::class.java)
if (i == 0) {
i = 1
calender.time = sdf.parse(item!!.Date)
EndDate = calender.time
} else {
i = 0
calender.time = sdf.parse(item!!.Date)
StartDate = calender.time
}//End else
}//End For
}//End onDataChange
})//End addValueEventListener
}//End
//Chick in Today Date In Date Range And Return The Result: Boolean
open fun DateIsChecked(): Boolean{
check_date()
Log.e("Date",today.toString())
Log.e("Date", StartDate.toString())
Log.e("Date", EndDate.toString())
return true
}
android kotlin
android kotlin
asked Nov 23 '18 at 13:27
FOS AUFOS AU
115
115
1
They're only going to be assigned if whatever is in yourPlan
reference actually changes.
– TheWanderer
Nov 23 '18 at 13:28
add a comment |
1
They're only going to be assigned if whatever is in yourPlan
reference actually changes.
– TheWanderer
Nov 23 '18 at 13:28
1
1
They're only going to be assigned if whatever is in your
Plan
reference actually changes.– TheWanderer
Nov 23 '18 at 13:28
They're only going to be assigned if whatever is in your
Plan
reference actually changes.– TheWanderer
Nov 23 '18 at 13:28
add a comment |
1 Answer
1
active
oldest
votes
in check_date
method you just added a listener for changing on 'Plan'. so the onDataChange
method is not called and your StartDate
and EndDate
will not get those value until your plan data changes.
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
in check_date
method you just added a listener for changing on 'Plan'. so the onDataChange
method is not called and your StartDate
and EndDate
will not get those value until your plan data changes.
add a comment |
in check_date
method you just added a listener for changing on 'Plan'. so the onDataChange
method is not called and your StartDate
and EndDate
will not get those value until your plan data changes.
add a comment |
in check_date
method you just added a listener for changing on 'Plan'. so the onDataChange
method is not called and your StartDate
and EndDate
will not get those value until your plan data changes.
in check_date
method you just added a listener for changing on 'Plan'. so the onDataChange
method is not called and your StartDate
and EndDate
will not get those value until your plan data changes.
edited Nov 25 '18 at 14:44
Jayson Minard
42k19114175
42k19114175
answered Nov 23 '18 at 14:13
Reza.AbediniReza.Abedini
1,1291914
1,1291914
add a comment |
add a comment |
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1
They're only going to be assigned if whatever is in your
Plan
reference actually changes.– TheWanderer
Nov 23 '18 at 13:28