fix #168

app/src/main/java/de/jrpie/android/launcher/Application.kt

@@ -120,8 +120,6 @@ class Application : android.app.Application() {
         appWidgetHost = AppWidgetHost(this.applicationContext, APP_WIDGET_HOST_ID)
         appWidgetManager = AppWidgetManager.getInstance(this.applicationContext)
 
-        appWidgetHost.startListening()
-
 
         val preferences = PreferenceManager.getDefaultSharedPreferences(this)
         LauncherPreferences.init(preferences, this.resources)
@@ -178,10 +176,4 @@ class Application : android.app.Application() {
             apps.postValue(getApps(packageManager, applicationContext))
         }
     }
-
-    override fun onTerminate() {
-        appWidgetHost.stopListening()
-        super.onTerminate()
-
-    }
 }

app/src/main/java/de/jrpie/android/launcher/ui/HomeActivity.kt

@@ -93,15 +93,6 @@ class HomeActivity : UIObject, Activity() {
         LauncherPreferences.getSharedPreferences()
             .registerOnSharedPreferenceChangeListener(sharedPreferencesListener)
 
-        (application as Application).appWidgetHost.startListening()
-
-    }
-
-
-
-    override fun onStop() {
-        (application as Application).appWidgetHost.stopListening()
-        super.onStop()
     }
 
     override fun onWindowFocusChanged(hasFocus: Boolean) {
@@ -112,7 +103,6 @@ class HomeActivity : UIObject, Activity() {
         }
     }
 
-
     private fun updateSettingsFallbackButtonVisibility() {
         // If µLauncher settings can not be reached from any action bound to an enabled gesture,
         // show the fallback button.
@@ -131,6 +121,11 @@ class HomeActivity : UIObject, Activity() {
         return modifyTheme(super.getTheme())
     }
 
+    override fun onPause() {
+        (application as Application).appWidgetHost.stopListening()
+        super.onPause()
+    }
+
     override fun onResume() {
         super.onResume()
 
@@ -161,6 +156,9 @@ class HomeActivity : UIObject, Activity() {
         binding.homeWidgetContainer.updateWidgets(this@HomeActivity,
             LauncherPreferences.widgets().widgets()
         )
+
+
+        (application as Application).appWidgetHost.startListening()
     }
 
     override fun onDestroy() {

app/src/main/java/de/jrpie/android/launcher/ui/widgets/WidgetPanelActivity.kt

@@ -4,6 +4,7 @@ import android.app.Activity
 import android.content.res.Resources
 import android.os.Bundle
 import androidx.core.view.ViewCompat
+import de.jrpie.android.launcher.Application
 import de.jrpie.android.launcher.R
 import de.jrpie.android.launcher.databinding.ActivityWidgetPanelBinding
 import de.jrpie.android.launcher.preferences.LauncherPreferences
@@ -57,6 +58,17 @@ class WidgetPanelActivity : Activity(), UIObject {
     override fun onStart() {
         super<Activity>.onStart()
         super<UIObject>.onStart()
+
+    }
+
+    override fun onPause() {
+        (application as Application).appWidgetHost.stopListening()
+        super.onPause()
+    }
+
+    override fun onResume() {
+        super.onResume()
+        (application as Application).appWidgetHost.startListening()
     }
 
     override fun isHomeScreen(): Boolean {

app/src/main/java/de/jrpie/android/launcher/ui/widgets/manage/ManageWidgetPanelsActivity.kt

@@ -9,6 +9,7 @@ import android.widget.EditText
 import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatActivity
 import androidx.recyclerview.widget.LinearLayoutManager
+import de.jrpie.android.launcher.Application
 import de.jrpie.android.launcher.R
 import de.jrpie.android.launcher.databinding.ActivityManageWidgetPanelsBinding
 import de.jrpie.android.launcher.preferences.LauncherPreferences

app/src/main/java/de/jrpie/android/launcher/ui/widgets/manage/ManageWidgetsActivity.kt

@@ -92,13 +92,19 @@ class ManageWidgetsActivity : UIObject, Activity() {
 
     }
 
+    override fun onPause() {
+        (application as Application).appWidgetHost.stopListening()
+        super.onPause()
+    }
+
     override fun onResume() {
         super.onResume()
+        (application as Application).appWidgetHost.startListening()
+
         binding.manageWidgetsContainer.updateWidgets(
             this,
             LauncherPreferences.widgets().widgets()
         )
-
     }
 
     override fun onWindowFocusChanged(hasFocus: Boolean) {

app/src/main/java/de/jrpie/android/launcher/ui/widgets/manage/WidgetManagerView.kt

@@ -113,7 +113,7 @@ class WidgetManagerView(widgetPanelId: Int, context: Context, attrs: AttributeSe
                         height
                     )
                 selectedWidgetOverlayView = view
-                selectedWidgetView = widgetViewById[view.widgetId] ?: return true
+                selectedWidgetView = widgetViewById[view.widgetId]
                 startWidgetPosition = position
 
                 val positionInView = start.minus(Point(position.left, position.top))

app/src/main/java/de/jrpie/android/launcher/widgets/AppWidget.kt

@@ -78,6 +78,10 @@ class AppWidget(
 
     override fun createView(activity: Activity): AppWidgetHostView? {
         val providerInfo = activity.getAppWidgetManager().getAppWidgetInfo(id) ?: return null
+        /* TODO: if providerInfo is null, the corresponding app was probably uninstalled.
+            There does not seem to be a way to recover the widget when the app is installed again,
+            hence it should be deleted. */
+
         val view = activity.getAppWidgetHost()
                 .createView(activity, this.id, providerInfo)