How to update widget with data from Activity?

Question

I want to update widget with data from my Activity every second. I have Item which has timers and its updating by onBind method sending payload to it. Every time it will update data and send new (Strings, Dates, Color resources) to payload, I want to update existing Widget with these data. I should update it every second as timer goes on. (payload is sent every second) Is this possible? Because I can add my data to extras and send Intent to AppWidgetProvider, but I don't know how to update views in Widget with new data sent into onReceive. Tried this code in onUpdate function. Which should be called every 1000ms which I set in xml for widget provider - android:updatePeriodMillis="1000". What is happening is Grey box on my homescreen with Problem loading widget text. No crashes or errors were present in logs.

RecyclerView item:

private fun updateWidgetTimer(text: String, color: Int){ val int = Intent(a, WidgetProvider::class.java) int.apply { putExtra(WidgetProvider.REM_TIME, text) putExtra(WidgetProvider.REM_TIME_COLOR, color) action = AppWidgetManager.ACTION_APPWIDGET_UPDATE } }

AppWidgetProvider:

 private var time: String = "" private var color: Int = R.color.colorGreen override fun onUpdate( context: Context?, appWidgetManager: AppWidgetManager?, appWidgetIds: IntArray? ) { val remoteViews = RemoteViews(context?.packageName, R.layout.widget_custom_layout) remoteViews.setTextViewText(R.id.timer, time) context?.let { remoteViews.setTextColor(R.id.timer, ContextCompat.getColor(context, color)) } } override fun onReceive(context: Context?, intent: Intent?) { super.onReceive(context, intent) val extras = intent?.extras extras?.let { time = extras.getString(REM_TIME)?:"" color = extras.getInt(REM_TIME_COLOR) } }

UPDATE: Payload is successfully send to onReceive, but as onUpdate is called, none of my widgets are updated with new data.

Example of my updated onUpdate function:

override fun onUpdate( context: Context?, appWidgetManager: AppWidgetManager?, appWidgetIds: IntArray? ) { context?.let { val currWidgetInstanceName = ComponentName(context, WidgetProvider::class.java) val widgetManager = AppWidgetManager.getInstance(context) val widgetIds = widgetManager.getAppWidgetIds(currWidgetInstanceName) widgetIds?.forEach {wId-> val remoteViews = RemoteViews(context.packageName, R.layout.widget_layout) remoteViews.apply { //set info title setTextViewText(R.id.title, title) //set subtitle setTextViewText(R.id.subT, subt) //set info setTextViewText(R.id.info, info) //set rem timer setTextViewText(R.id.outTimer, remTime) setTextColor(R.id.outTimer, ContextCompat.getColor(context, remTimeColor)) } widgetManager?.updateAppWidget(currWidgetInstanceName, remoteViews) } } }

U can try workmanager.Reference are : * googleadservices.com/pagead/… — SIVAKUMAR.J
– SIVAKUMAR.J, Commented Nov 13, 2019 at 11:46
additional links are : developer.android.com/topic/libraries/architecture/… — SIVAKUMAR.J
– SIVAKUMAR.J, Commented Nov 13, 2019 at 11:46
Tried alarm manager but it still showing Problem loading widget text — Martin
– Martin, Commented Nov 13, 2019 at 11:58
Still cant call onUpdate function. onReceive is called as manager is calling it but onUpdate is called only as I create widget on homescreen for a first time — Martin
– Martin, Commented Nov 13, 2019 at 13:39

Mariusz · Accepted Answer · 2020-04-09 20:18:34Z

AppWidgetProvider.onUpdate is called by AppWidgetProvider.onReceive. Call super.onReceive(context, intent) at the end of onReceive method. Data will be updated before onUpdate will be called.

override fun onReceive(context: Context?, intent: Intent?) { val extras = intent?.extras extras?.let { time = extras.getString(REM_TIME)?:"" color = extras.getInt(REM_TIME_COLOR) } super.onReceive(context, intent) }

dustblue · Accepted Answer · 2019-11-13 11:12:11Z

From https://developer.android.com/reference/android/appwidget/AppWidgetProviderInfo

Note: Updates requested with updatePeriodMillis will not be delivered more than once every 30 minutes.

If you want frequent updates, you should use

AlarmManager

Use a service and update the widget, example:

Intent intent = new Intent(context, WidgetUpdateService.class); PendingIntent pendingIntent = PendingIntent.getService(context, 0, intent, 0); AlarmManager alarm = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE); alarm.cancel(pending); alarm.setRepeating(AlarmManager.ELAPSED_REALTIME, SystemClock.elapsedRealtime(), 1000, pendingIntent);

It says on 1000 in setRepeating that it will be forced up to 60000ms

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