feat: prompt to set as default on startup (#231)

* feat: prompt to set as default on startup

To make it more reliable in case of multiple denials, `Long press on home screen ➜ Set as default now` launches the system page for selecting default home app instead of prompting using the RoleManager API.

Refs: https://github.com/FossifyOrg/Launcher/issues/230

* docs: update changelog

CHANGELOG.md

@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Changed
+- The app will now prompt to set as default launcher on startup ([#230])
 
 ## [1.2.0] - 2025-07-15
 ### Added
@@ -68,6 +70,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 [#106]: https://github.com/FossifyOrg/Launcher/issues/106
 [#115]: https://github.com/FossifyOrg/Launcher/issues/115
 [#182]: https://github.com/FossifyOrg/Launcher/issues/182
+[#230]: https://github.com/FossifyOrg/Launcher/issues/230
 
 [Unreleased]: https://github.com/FossifyOrg/Launcher/compare/1.2.0...HEAD
 [1.2.0]: https://github.com/FossifyOrg/Launcher/compare/1.1.4...1.2.0

app/src/main/kotlin/org/fossify/home/activities/MainActivity.kt

@@ -21,6 +21,7 @@ import android.graphics.drawable.Drawable
 import android.os.Bundle
 import android.os.Handler
 import android.os.Looper
+import android.provider.Settings
 import android.provider.Telephony
 import android.telecom.TelecomManager
 import android.view.ContextThemeWrapper
@@ -164,6 +165,10 @@ class MainActivity : SimpleActivity(), FlingListener {
                 clickedGridItem = it
             )
         }
+
+        if (!isDefaultLauncher()) {
+            requestHomeRole()
+        }
     }
 
     override fun onNewIntent(intent: Intent) {
@@ -775,7 +780,7 @@ class MainActivity : SimpleActivity(), FlingListener {
             Gravity.TOP or Gravity.END
         ).apply {
             inflate(R.menu.menu_home_screen)
-            menu.findItem(R.id.set_as_default).isVisible = isQPlus() && !isDefaultLauncher()
+            menu.findItem(R.id.set_as_default).isVisible = !isDefaultLauncher()
             setOnMenuItemClickListener { item ->
                 when (item.itemId) {
                     R.id.widgets -> showWidgetsFragment()
@@ -841,6 +846,18 @@ class MainActivity : SimpleActivity(), FlingListener {
     }
 
     private fun launchSetAsDefaultIntent() {
+        val intents = listOf(
+            Intent(Settings.ACTION_HOME_SETTINGS),
+            Intent(Settings.ACTION_MANAGE_DEFAULT_APPS_SETTINGS),
+            Intent(Settings.ACTION_SETTINGS)
+        )
+        val intent = intents.firstOrNull { it.resolveActivity(packageManager) != null }
+        if (intent != null) {
+            startActivity(intent)
+        }
+    }
+
+    private fun requestHomeRole() {
         if (isQPlus()) {
             startActivityForResult(
                 roleManager.createRequestRoleIntent(RoleManager.ROLE_HOME),

app/src/main/kotlin/org/fossify/home/extensions/Context.kt

@@ -1,14 +1,18 @@
 package org.fossify.home.extensions
 
-import android.annotation.TargetApi
 import android.app.role.RoleManager
 import android.appwidget.AppWidgetProviderInfo
+import android.content.ComponentName
 import android.content.Context
+import android.content.Intent
+import android.content.IntentFilter
 import android.content.pm.LauncherApps
 import android.graphics.drawable.Drawable
 import android.os.Build
 import android.os.Process
 import android.util.Size
+import androidx.annotation.RequiresApi
+import org.fossify.commons.helpers.isQPlus
 import org.fossify.commons.helpers.isSPlus
 import org.fossify.home.databases.AppsDatabase
 import org.fossify.home.helpers.Config
@@ -31,7 +35,7 @@ val Context.homeScreenGridItemsDB: HomeScreenGridItemsDao
 val Context.hiddenIconsDB: HiddenIconsDao
     get() = AppsDatabase.getInstance(applicationContext).HiddenIconsDao()
 
-@get:TargetApi(Build.VERSION_CODES.Q)
+@get:RequiresApi(Build.VERSION_CODES.Q)
 val Context.roleManager: RoleManager
     get() = getSystemService(RoleManager::class.java)
 
@@ -76,9 +80,20 @@ fun Context.getCellCount(size: Int): Int {
     return max(tiles, 1)
 }
 
-@TargetApi(Build.VERSION_CODES.Q)
 fun Context.isDefaultLauncher(): Boolean {
-    return with(roleManager) {
-        isRoleAvailable(RoleManager.ROLE_HOME) && isRoleHeld(RoleManager.ROLE_HOME)
+    return if (isQPlus()) {
+        with(roleManager) {
+            isRoleAvailable(RoleManager.ROLE_HOME) && isRoleHeld(RoleManager.ROLE_HOME)
+        }
+    } else {
+        val filters = ArrayList<IntentFilter>()
+        val activities = ArrayList<ComponentName>()
+        @Suppress("DEPRECATION")
+        packageManager.getPreferredActivities(filters, activities, null)
+        return activities.indices.any { i ->
+            activities[i].packageName == packageName &&
+                    filters[i].hasAction(Intent.ACTION_MAIN) &&
+                    filters[i].hasCategory(Intent.CATEGORY_HOME)
+        }
     }
 }