I'm working with TCP communication and use Ktor library.
I have packets that come, and the first byte is the packet's lengths.
Likewise, I read the packet from what is documented on the protocol API, and sometimes I have to skip the remaining bytes of the packet, so I subtract what I have read to this message length.
At the present time, I call also { messageLength -= length } on each reading, but the code is unreadable.
#Test
fun ktorTests() {
runBlocking {
val selectorManager = SelectorManager(Dispatchers.IO)
val socket = aSocket(selectorManager).tcp().connect("server.slsknet.org", 2242)
val openReadChannel = socket.openReadChannel()
val openWriteChannel = socket.openWriteChannel(autoFlush = true)
val login = "Test"
val pwd = "159753"
openWriteChannel.write {
it.put(
ByteMessage().writeInt32(1)
.writeStr(login)
.writeStr(pwd)
.writeInt32(160)
.writeStr((login + pwd).toMD5())
.writeInt32(1)
.getBuff()
)
}
while (true) {
var messageLength = openReadChannel.readIntLittleEndian()
val code = openReadChannel.readIntLittleEndian()
println("ServerClient received: Message code:" + code + " Packet Size:" + (messageLength + 4))
when (code) {
1 -> {
if (openReadChannel.readBoolean().also { messageLength -= 1 }) {
val greetingLength = openReadChannel.readIntLittleEndian().also { messageLength -= 4 }
val greeting = ByteArray(greetingLength)
openReadChannel.readFully(greeting, 0, greetingLength)
.also { messageLength -= greetingLength }
val ip = openReadChannel.readIntLittleEndian().also { messageLength -= 4 }
println("Logged In.")
}
openReadChannel.discardExact(messageLength.toLong())
}
}
}
Any ideas on ho could it be done ?
private fun moveMarkerAnimation(key: String, newData: AnimationModel, marker: Marker?, from: String, to: String) {
if (!newData.isRun)
{
compositeDisposable.add(
iGoogleAPI.getDirections(
"driving",
"less_driving",
from, to,
getString(R.string.google_api_key1)
)!!.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe { returnResult ->
Log.d("API_RETURN",returnResult,)
try {
val jsonObject = JSONObject(returnResult)
val jsonArray = jsonObject.getJSONArray("routes")
for ( i in 0 until jsonArray.length())
{
val route = jsonArray.getJSONObject(i)
val poly = route.getJSONObject("overview_polyLine")
val polyLine = poly.getString("points")
polylineList = Common.decodePoly(polyLine) as java.util.ArrayList<LatLng?>
}
handler = Handler()
index = -1
next = 1
val runnable = object :Runnable{
override fun run() {
if (polylineList!!.size > 1)
{
if (index< polylineList!!.size)
{
index ++
next = index+1
start = polylineList!![index] !!
end = polylineList!![next]!!
}
val valueAnimator = ValueAnimator.ofInt(0,1)
valueAnimator.duration = 3000
valueAnimator.interpolator = LinearInterpolator()
valueAnimator.addUpdateListener { value ->
v = value.animatedFraction
lat = v*end !!.latitude + (1-v) * start!!.latitude
lng = v*end !!.longitude+ (1-v) * start!!.longitude
val newPos = LatLng(lat,lng)
marker!!.position = newPos
marker!!.setAnchor(0.5f,0.5f)
marker!!.rotation = Common.getBearing(start!!,newPos)
}
valueAnimator.start()
if (index < polylineList!!.size-2)
{
handler!!.postDelayed(this,1500)
}else if (index < polylineList!!.size-1)
{
newData.isRun = false
Common.driversSubscrib.put(key,newData)
}
}
}
}
handler!!.postDelayed(runnable,1500)
}
catch (e:java.lang.Exception){
Snackbar.make(requireView(),e.message!!,Snackbar.LENGTH_LONG).show()
}
When the site changes from from firebase this result appears
022-04-26 13:19:30.912 23482-23482/com.example.bustrackerriderapp E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.bustrackerriderapp, PID: 23482
io.reactivex.exceptions.OnErrorNotImplementedException: The exception was not handled due to missing onError handler in the subscribe() method call. Further reading
what should I do to fix this problem
I am using the requestj api to send and receive the data from server and setting up the alarm on time that i received from server and alarm calls two hours ago from received time but issue is that when alarm fire on exact time it also fire every time when api calls till that 2 hours didn't completed. Any one know how to prevent it?
1.API code is here
fun getAllFriendsReminders(context: Context) {
val getReminderHttpRequest = HttpRequest()
// val myList = ArrayList<FriendsRemindersListModel>()
getReminderHttpRequest.setOnResponseListener { getReminderListResponse ->
Log.e("getReminders List", getReminderListResponse.code.toString())
Log.e("getReminders List", getReminderListResponse.text)
if (getReminderListResponse.code == HttpResponse.HTTP_OK) {
Log.e("getReminders List", getReminderListResponse.code.toString())
val jsonArray = getReminderListResponse.toJSONArray()
getReminderListModel.clear()
Log.e("list", jsonArray.length().toString())
Log.e("list", jsonArray.toString())
val loggedInUser = appGlobals.getValueString("loginUsername")
for (i in 0 until jsonArray!!.length()) {
if (!onForeGround) {
progressBar!!.progress = i
}
Log.e("listi", i.toString())
val jsonObject = jsonArray.getJSONObject(i)
friendReminderText = jsonObject.getString("reminder")
friendReminderFromName = jsonObject.getString("reminder_from")
friendReminderToName = jsonObject.getString("reminder_to")
friendReminderDate = jsonObject.getString("date")
friendReminderStatus = jsonObject.getString("status")
friendReminderId = jsonObject.getString("id")
if (friendReminderFromName != loggedInUser) {
getReminderListModel.add(FriendsRemindersListModel(0, friendReminderId.toInt(),friendReminderText,
friendReminderDate, friendReminderFromName, friendReminderToName, friendReminderStatus))
//Received date time from server
val dateTimeFormatter = DateTimeFormatter.ofPattern("dd-MM-yyyy hh:mm:ss a")
// val dateFormatter = DateTimeFormatter.ofPattern("dd-MM-yyyy")
// val timeFormatter = DateTimeFormatter.ofPattern("hh:mm:ss a")
val instant = Instant.ofEpochMilli(friendReminderDate.toLong())
val instant1 = Instant.ofEpochMilli(friendReminderDate.toLong() - (120 * 60 * 1000))
val date = LocalDateTime.ofInstant(instant, ZoneId.systemDefault())
val date1 = LocalDateTime.ofInstant(instant1, ZoneId.systemDefault())
// val exactDate = dateFormatter.format(date)
// val exactTime = timeFormatter.format(date)
val exactDateTime = dateTimeFormatter.format(date)
val alarmDate = Date(friendReminderDate.toLong())
//Current date time
val dates = Date()
val stringFormat = SimpleDateFormat("dd-MM-yyyy hh:mm:ss a")
val dateTimeTo = stringFormat.format(dates.time)
//Set Alarm
if (alarmDate.after(dates)) {
Log.d("D", dates.toString())
Log.d("AlarmDate", alarmDate.toString())
Log.e("2 hour ago", dateTimeFormatter.format(date1))
println(friendReminderDate.toLong() - (120 * 60 * 1000))
Log.e("Set", exactDateTime)
val alarmManager: AlarmManager = context.getSystemService(
AppCompatActivity.ALARM_SERVICE) as AlarmManager
val alarmIntent = Intent(requireContext(), AlarmReceiver::class.java)
val pendingIntent = PendingIntent.getBroadcast(context, 0, alarmIntent, 0)
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
Log.e("Alarm", "Alarm")
alarmManager.setAlarmClock(AlarmManager.AlarmClockInfo(friendReminderDate.toLong() - 120*60*1000,
pendingIntent), pendingIntent)
} else {
Log.e("Alarm1", "${friendReminderDate.toLong() - (120 * 60 * 1000)}")
alarmManager.setExactAndAllowWhileIdle(AlarmManager.RTC_WAKEUP,
(friendReminderDate.toLong()) - 120 * 60 * 1000,
pendingIntent)
Log.e("Alarm2", "Alarm")
}
}
// if (exactDateTime > dateTimeTo) {
//
// }
}
}
if (friendReminderFromName != loggedInUser) {
if (friendReminderId != "") {
reminder = FriendsRemindersListModel(0, friendReminderId.toInt(), friendReminderText, friendReminderDate,
friendReminderFromName, friendReminderToName, friendReminderStatus)
}
}
if (getReminderListModel.size.toString() > remindersListModel.size.toString()) {
Log.e("serverListSize", getReminderListModel.size.toString())
Log.e("dbListSize", remindersListModel.size.toString())
Log.e("JsonListSize", jsonArray.length().toString())
for (i in 0 until getReminderListModel.size - 1) {
Log.e("present", getReminderListModel[i].reminderId.toString())
var isPresent = false
for (j in 0 until remindersListModel.size - 1) {
Log.e("present", remindersListModel.toString())
if (remindersListModel.isNotEmpty()) {
if (getReminderListModel[i].reminderId == remindersListModel[i].reminderId) {
isPresent = true
}
}
}
Log.e("presenting", "${!isPresent}")
if (isPresent) {
remindersViewModel.addingReminder(reminder)
}
}
}
else if (getReminderListModel.size.toString() < remindersListModel.size.toString()) {
for (i in 0 until remindersListModel.size - 1) {
for (j in 0 until getReminderListModel.size - 1) {
// var isRemoved = false
// Log.e("i's", i.toString())
Log.e("i's", getReminderListModel.size.toString())
Log.e("i'ss", remindersListModel.size.toString())
if (remindersListModel.isNotEmpty()) {
Log.e("delete3", remindersListModel[i].reminderId.toString())
Log.e("delete3", remindersListModel[i].reminderText)
Log.e("delete4", getReminderListModel[j].reminderId.toString())
Log.e("delete4", getReminderListModel[j].reminderText)
if (remindersListModel[i].reminderId != getReminderListModel[i].reminderId ) {
Log.e("delete2", remindersListModel[i].reminderId.toString())
remindersViewModel.deleteReminder(remindersListModel[i].reminderId)
// getReminderListAdapter.notifyItemRemoved(i)
}
}
}
}
}
// if (getReminderListModel.size.toString() != getRemindersDBList.size.toString()) {
// remindersViewModel.deleteReceivedReminders()
// remindersViewModel.addReminder(getReminderListModel)
// }
if (progressBar!= null) {
progressBar!!.visibility = View.GONE
}
}
}
getReminderHttpRequest.setOnErrorListener {
if (progressBar != null) {
progressBar!!.visibility = View.GONE
}
Log.e("getReminders error", "$it")
Log.e("Alarm1", "${friendReminderDate.toLong() - (120 * 60 * 1000)}")
}
val token = appGlobals.getValueString("userToken")
val headers = HttpHeaders("Authorization", "Token $token")
getReminderHttpRequest.get(AppGlobals.GET_REMINDERS_LIST_API, headers)
}
2. Alarm receiver class:
class AlarmReceiver: BroadcastReceiver() {
#RequiresApi(Build.VERSION_CODES.O)
#SuppressLint("UnsafeProtectedBroadcastReceiver")
override fun onReceive(context: Context?, intent: Intent?) {
showNotification(context!!, MessagingServiceFirebase.title, MessagingServiceFirebase.body)
Log.e("Checking notify", "Notification")
// Toast.makeText(context, "Alarm", Toast.LENGTH_SHORT).show()
Log.e("Checking ", "Notification")
// ringTone(context)
}
// private fun ringTone(context: Context) {
// val alert: Uri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_ALARM)
// val ringtone: Ringtone = RingtoneManager.getRingtone(context, alert)
//
// ringtone.play()
// Toast.makeText(context, "Alarm Called", Toast.LENGTH_SHORT).show()
// }
fun showNotification(ctx: Context, title: String, message: String) {
val notificationManager =
ctx.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
val channelId = "channel"
val name: CharSequence = "channel"
val description = "The channel"
val importance = NotificationManager.IMPORTANCE_HIGH
val mChannel = NotificationChannel(channelId, name, importance)
mChannel.description = description
mChannel.enableLights(true)
mChannel.lightColor = Color.RED
mChannel.enableVibration(true)
mChannel.vibrationPattern = longArrayOf(100, 200, 300, 400, 500, 400, 300, 200, 400)
mChannel.setShowBadge(false)
notificationManager.createNotificationChannel(mChannel)
}
val builder: NotificationCompat.Builder = NotificationCompat.Builder(ctx, "channel")
.setSmallIcon(R.drawable.ic_baseline_access_alarm_24)
.setContentTitle(title)
.setContentText(message)
val resultIntent = Intent(ctx, HomeActivity::class.java)
val stackBuilder: TaskStackBuilder = TaskStackBuilder.create(ctx)
stackBuilder.addParentStack(HomeActivity::class.java)
resultIntent.putExtra("NotifyTitle", title)
resultIntent.putExtra("NotifyMessage", message)
stackBuilder.addNextIntent(resultIntent)
val resultPendingIntent: PendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT)
builder.setContentIntent(resultPendingIntent)
builder.setAutoCancel(true)
notificationManager.notify(12, builder.build())
}
}
3. Manifest code
<uses-permission android:name="android.permission.SCHEDULE_EXACT_ALARM" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
<receiver
android:name=".AlarmReceiver"
android:enabled="true"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<action android:name="android.intent.action.LOCKED_BOOT_COMPLETED" />
</intent-filter>
</receiver>
You pull date from the JSON, and set an alarm for 2 hours before that? So if date is 6pm, you set an alarm for 4pm?
alarmManager.setExactAndAllowWhileIdle(
AlarmManager.RTC_WAKEUP,
friendReminderDate.toLong()) - 120 * 60 * 1000, // date - 2hrs
pendingIntent)
If it's 5pm right now, and you set an alarm for 4pm, it will still set, and fire immediately:
If the stated trigger time is in the past, the alarm will be triggered immediately. If there is already an alarm for this Intent scheduled (with the equality of two intents being defined by Intent#filterEquals), then it will be removed and replaced by this one.
So if you only want to set the alarm if now <= alarmTime, and just skip it if now > alarmTime, you need to do that check before you set the alarm.
It looks like you're trying to do that:
if (alarmDate.after(dates)) {
but alarmDate is "date", not "date - 2hrs" (you're using 6pm instead of 4pm):
val alarmDate = Date(friendReminderDate.toLong())
So during that 2-hour period, you're always setting alarms that fire immediately. You need to use your actual alarm time instead:
// seriously, just do this calculation once and refer to the variable
val alarmTime = friendReminderDate.toLong() - (120 * 60 * 1000)
val alarmDate = Date(alarmTime)
You have a lot of date variables piling up in there, it's confusing and hard to tell what's going on - that's probably how this alarmDate bug crept in.
Also just in case, you know your "alarm receiver" also fires and shows a notification when the device boots and when it first unlocks, right?
The (-2hrs) above is only correct, when you are in:
(UTC +1) zone AND there is SUMMER (+1) or
(UTC +2) zone AND there is WINTER (+0)
The correct datetime is in millis (kotlin datetime to millisecond convert using local zone and daylight offset):
val myalarmdatetime: String = "2022-05-31 23:59:59"
val myalarmdatetimemillis: Long =
ZonedDateTime.of(
LocalDateTime.parse(
myalarmdatetime,
DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")
), ZoneId.systemDefault()
).toInstant().toEpochMilli()
(new to kotlin) I'm making my own music app but i'm having an error that i don't understand :
in the bit of code where i try to access a random view (shuffle), i get the java.lang.IndexOutOfBoundsException: Index:96 Size:11.
96 in this example is the view in the listview that i'm trying to access.
It happens in this line : var iView = listViewMusic.get(idShuffle)
Same if i use listViewMusic[idShuffle]
EDIT : Turns out that 11 is only the 11 visible items on screen at any given moment, even if the list contains hundreds of items. When i use listViewMusic.smoothscrolltoposition(idShuffle) it works, but the size of 11 now relates to the 11 on screen after the scrolling
The function playNext() inside the activity, called when clicking on the shuffle button:
fun playNext(){
try {
// Find the order of the next song to play
var idShuffle = musicAdapter!!.getIdofItem(listMusicShuffled.get(musicNextToPlay).title)
// Find the right record in the list
//var iView = listViewMusic[idShuffle]
//toastIt(applicationContext, "adapter count ${listViewMusic.adapter.count}")
//toastIt(applicationContext, "listview count ${listViewMusic.count}")
var iView = listViewMusic.get(idShuffle) //throws the error
// Play it
playOrPause(iView)
// Prepare the next track
musicNextToPlay += 1
if (musicNextToPlay >= listMusicShuffled.size) {
musicNextToPlay = -1
}
} catch (e:Exception) {toastException(applicationContext, "playnext", e) }
}
The part of the function onCreate that fills in the listViewMusic:
// Retrieve the data
val mediaStoreUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI
val cursor = contentResolver.query(mediaStoreUri, null, "", null, null)
//Browse the data
listMusic = mutableListOf()
val listMusicJson = getMusicFromJson()
while (cursor!!.moveToNext()) {
val musicName = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.DISPLAY_NAME))
val musicArtist = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ARTIST))
val musicUrl = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.DATA))
val musicType:String =
if (musicArtist.contains("lmdmf", true)) { "LMDMF" }
else if (musicName.contains("slack", true)) { "SLACK" }
else { "MUSIC" }
listMusic.add(
MusicTrack(
musicName,
musicPlayCount,
musicUrl,
musicType
)
)
}
cursor.close()
musicAdapter = MusicAdapter(listMusic.sortedWith(compareBy<MusicTrack>{ it.title }).filter { it.type == "MUSIC"}.toMutableList())
listViewMusic.adapter = musicAdapter
My Problem: i have set the notification as an alarm.When the sound on the cellphone is on, the cellphone takes the sound as an alarmsound. But if the cellphone is muted, the cellphone vibrates, but there is no sound./no alarmsound/no ringtone. I cant even see the volume/sound level for the alarm, only the volume of the ringtone is visible on the cellphone.The alarm works fine on different emulator-> So the question is: Is there a way to force the notification to use the Alarmsound and not the Ringtone? An idea would be appreciated.(PS: i have tried it also as a service with notification)Thank you!here is my my code:
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
val channelImportance = if (playSound) {
NotificationManager.IMPORTANCE_HIGH
} else {
NotificationManager.IMPORTANCE_LOW
}
val audioAttribute = AudioAttributes.Builder()
.setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
.setUsage(AudioAttributes.USAGE_ALARM)
.build()
val notificationSound: Uri =
RingtoneManager.getDefaultUri(RingtoneManager.TYPE_ALARM)
val notyChannel =
NotificationChannel(channelID, channelName, channelImportance)
notyChannel.enableLights(true)
notyChannel.lightColor = Color.RED
notyChannel.setSound(notificationSound,audioAttribute)
notyChannel.enableVibration(true)
notyChannel.vibrationPattern = longArrayOf(
1000,100,100,100,1000,100,100,100,1000)
this.createNotificationChannel(notyChannel)
this works:
val audio =
context.getSystemService(Context.AUDIO_SERVICE) as AudioManager
if (mode == 0) audio.ringerMode =
AudioManager.RINGER_MODE_SILENT else if (mode == 1) audio.ringerMode =
AudioManager.RINGER_MODE_VIBRATE else if (mode == 2) audio.ringerMode =
AudioManager.RINGER_MODE_NORMAL