Providing click method to widgets - android-studio

Question

I tried to create a widget and I succeeded, but how can I meet the click needs of the tools in the widget?
What I'm talking about is not redirecting onto an activity, I'm looking for a method where I can create a function.
The layout file used for the widget below
<RelativeLayout xmlns:android = "http://schemas.android.com/apk/res/android"
android:layout_width = "wrap_content"
android:layout_height = "wrap_content"
android:id="#+id/kare"
android:theme = "#style/Theme.Mytwo.AppWidgetContainer" >
<Button
android:id = "#+id/appwidget_text"
android:layout_width = "wrap_content"
android:layout_height = "wrap_content"
android:layout_centerInParent = "true"
android:background = "#048018"
android:text = "clean"
android:textSize = "24sp"
android:padding="15dp"
android:textStyle = "bold" />
</RelativeLayout >
This is my widget provider class
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)
}
}
}
internal fun updateAppWidget(context: Context, appWidgetManager: AppWidgetManager, appWidgetId: Int) {
val views = RemoteViews(context.packageName, R.layout.new_app_widget )
appWidgetManager.updateAppWidget(appWidgetId, views)
}
And finally my provider info file
<appwidget-provider xmlns:android = "http://schemas.android.com/apk/res/android"
android:description = "#string/app_widget_description"
android:initialKeyguardLayout = "#layout/new_app_widget"
android:initialLayout = "#layout/new_app_widget"
android:minWidth = "100dp"
android:minHeight = "40dp"
android:previewImage = "#drawable/ic_launcher_foreground"
android:previewLayout = "#layout/new_app_widget"
android:resizeMode = "horizontal|vertical"
android:targetCellWidth = "2"
android:targetCellHeight = "2"
android:updatePeriodMillis = "86400000"
android:widgetCategory = "home_screen" />

Answer 1

I'm not sure what you mean by "create a function". The only way to get something to happen when a widget is clicked is via RemoteViews#setOnCheckedChangeResponse or RemoteViews#setOnClickFillInIntent or
RemoteViews#setOnClickPendingIntent or
RemoteViews#setOnClickResponse.
Apart from calling RemoteViews.RemoteResponse#addSharedElement,
all that any of these can do is to send out an Intent, which can start an Activity or awaken a BroadcastReceiver.
You can't execute your own code inside the widget: any code that you want to execute in response to a click on a widget has to be in the Activity or the BroadcastReceiver. It doesn't have to be an Activity or a BroadcastReceiver inside the app that created the widget, although it usually will be.
Since the RemoteViews is created inside your app's AppWidgetProvider#updateAppWidget, you can put the appWidgetId as an extra into the PendingIntent, so you can tell which widget was clicked.