widget update

NewAppWidget.kt

class NewAppWidget : AppWidgetProvider() {
    override fun onUpdate(
        context: Context,
        appWidgetManager: AppWidgetManager,
        appWidgetIds: IntArray
    ) {
        // There may be multiple widgets active, so update all of them
        for (appWidgetId in appWidgetIds) {
            updateAppWidget(context, appWidgetManager, appWidgetId)
        }
        log("onUpdate")
    }

    override fun onEnabled(context: Context) {
        super.onEnabled(context)
        setUpdateAlarm(context)
        log("onEnabled")
    }


    override fun onDisabled(context: Context) {
        super.onDisabled(context)
        val alarmManager = context.getSystemService(Context.ALARM_SERVICE) as AlarmManager
        alarmManager.cancel(getIntent(context))
        log("onDisabled")
    }
}

fun getIntent(context: Context): PendingIntent =
    PendingIntent.getBroadcast(
        context, 252,
        Intent().setClass(context, TimeChangeReceiver::class.java)
            .setAction("com.example.mywidget.APPWIDGET"),
        PendingIntent.FLAG_UPDATE_CURRENT
    )

fun setUpdateAlarm(context: Context) {
    val alarmManager = context.getSystemService(Context.ALARM_SERVICE) as AlarmManager
    val intent = getIntent(context)
    log("next min: " + nextMinute().get(Calendar.MINUTE).toString())
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
        alarmManager.setExact(AlarmManager.RTC, nextMinute().timeInMillis, intent)
    } else {
        alarmManager.set(AlarmManager.RTC, nextMinute().timeInMillis, intent)
    }
    log("setUpdateAlarm")
}

fun log(string: String) {
    Log.i("DebugPC", "x0x:  $string")
}

fun nextMinute(): Calendar {
    return nextMinute(Calendar.getInstance())
}

fun nextMinute(now: Calendar): Calendar {
    return nextMinute(now, 1)
}

fun nextMinute(now: Calendar, minutes: Int): Calendar {
    val then = now.clone() as Calendar
    then[Calendar.SECOND] = 0
    then[Calendar.MILLISECOND] = 0
    then.add(Calendar.MINUTE, minutes)
    return then
}

internal fun updateAppWidget(
    context: Context,
    appWidgetManager: AppWidgetManager,
    appWidgetId: Int
) {
    val widgetText = "Time is " + SimpleDateFormat("HH:mm:ss", Locale.getDefault()).format(Date())
    // Construct the RemoteViews object
    val views = RemoteViews(context.packageName, R.layout.new_app_widget)
    views.setTextViewText(R.id.appwidget_text, widgetText)

    // Instruct the widget manager to update the widget
    appWidgetManager.updateAppWidget(appWidgetId, views)
    log("updateAppWidget")
}

TimeChangeReceiver.kt

class TimeChangeReceiver : BroadcastReceiver() {

    override fun onReceive(context: Context, intent: Intent) {
        setUpdateAlarm(context)
        val updateIntent = Intent(context,NewAppWidget::class.java)
        updateIntent.action = AppWidgetManager.ACTION_APPWIDGET_UPDATE
        val ids = AppWidgetManager.getInstance(context).getAppWidgetIds(ComponentName(context,NewAppWidget::class.java))
        updateIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS,ids)
        context.sendBroadcast(updateIntent)
        log("TimeChangeReceiver onReceive")
    }
}