new action: launch other launchers

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

@@ -38,6 +38,8 @@ import androidx.core.net.toUri
 
 const val LOG_TAG = "Launcher"
 
+const val REQUEST_SET_DEFAULT_HOME = 42
+
 fun isDefaultHomeScreen(context: Context): Boolean {
     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
         val roleManager = context.getSystemService(RoleManager::class.java)
@@ -59,11 +61,12 @@ fun setDefaultHomeScreen(context: Context, checkDefault: Boolean = false) {
 
     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q
         && context is Activity
-        && !isDefault // using role manager only works when µLauncher is not already the default.
+        && checkDefault // using role manager only works when µLauncher is not already the default.
     ) {
         val roleManager = context.getSystemService(RoleManager::class.java)
-        context.startActivity(
+        context.startActivityForResult(
-            roleManager.createRequestRoleIntent(RoleManager.ROLE_HOME)
+            roleManager.createRequestRoleIntent(RoleManager.ROLE_HOME),
+            REQUEST_SET_DEFAULT_HOME
         )
         return
     }

app/src/main/java/de/jrpie/android/launcher/actions/LauncherAction.kt

@@ -154,6 +154,12 @@ enum class LauncherAction(
         R.drawable.baseline_flashlight_on_24,
         ::toggleTorch,
     ),
+    LAUNCH_OTHER_LAUNCHER(
+        "launcher_other_launcher",
+        R.string.list_other_launch_other_launcher,
+        R.drawable.baseline_home_24,
+        ::launchOtherLauncher
+    ),
     NOP("nop", R.string.list_other_nop, R.drawable.baseline_not_interested_24, {});
 
     override fun invoke(context: Context, rect: Rect?): Boolean {
@@ -258,6 +264,15 @@ private fun expandSettingsPanel(context: Context) {
     }
 }
 
+private fun launchOtherLauncher(context: Context) {
+    context.startActivity(
+        Intent.createChooser(
+            Intent(Intent.ACTION_MAIN).also { it.addCategory(Intent.CATEGORY_HOME) },
+            context.getString(R.string.list_other_launch_other_launcher)
+        )
+    )
+}
+
 private fun openSettings(context: Context) {
     context.startActivity(Intent(context, SettingsActivity::class.java))
 }

app/src/main/res/drawable/baseline_home_24.xml

@@ -0,0 +1,11 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+
+    <path
+        android:fillColor="?android:textColor"
+        android:pathData="M10,20v-6h4v6h5v-8h3L12,3 2,12h3v8z" />
+
+</vector>

app/src/main/res/values/strings.xml

@@ -256,6 +256,7 @@
     <string name="list_other_nop">Do nothing</string>
     <string name="list_other_lock_screen">Lock Screen</string>
     <string name="list_other_torch">Toggle Torch</string>
+    <string name="list_other_launch_other_launcher">Launch other Home Screen</string>
 
     <!-- Pin shortcuts -->
     <string name="pin_shortcut_title">Add Shortcut</string>