Set default double tap action to lock screen only on Android 9+

core/preferences/src/main/java/de/mm20/launcher2/preferences/Defaults.kt

@@ -1,6 +1,7 @@
 package de.mm20.launcher2.preferences
 
 import android.content.Context
+import de.mm20.launcher2.ktx.isAtLeastApiLevel
 import de.mm20.launcher2.preferences.Settings.SearchBarSettings.SearchBarColors
 import scheme.Scheme
 
@@ -170,7 +171,12 @@ fun createFactorySettings(context: Context): Settings {
         )
         .setGestures(
             Settings.GestureSettings.newBuilder()
-                .setDoubleTap(Settings.GestureSettings.GestureAction.LockScreen)
+                .setDoubleTap(
+                    if (isAtLeastApiLevel(28)) {
+                        Settings.GestureSettings.GestureAction.LockScreen
+                    } else {
+                        Settings.GestureSettings.GestureAction.None
+                    })
                 .setLongPress(Settings.GestureSettings.GestureAction.None)
                 .setSwipeDown(Settings.GestureSettings.GestureAction.OpenNotificationDrawer)
                 .setSwipeLeft(Settings.GestureSettings.GestureAction.None)

core/preferences/src/main/java/de/mm20/launcher2/preferences/migrations/Migration_11_12.kt

@@ -1,5 +1,6 @@
 package de.mm20.launcher2.preferences.migrations
 
+import de.mm20.launcher2.ktx.isAtLeastApiLevel
 import de.mm20.launcher2.preferences.Settings
 import de.mm20.launcher2.preferences.Settings.GestureSettings
 import de.mm20.launcher2.preferences.Settings.LayoutSettings
@@ -33,7 +34,13 @@ class Migration_11_12: VersionedMigration(11, 12) {
                 )
                     .setGestures(
                         GestureSettings.newBuilder()
-                            .setDoubleTap(GestureSettings.GestureAction.LockScreen)
+                            .setDoubleTap(
+                                if (isAtLeastApiLevel(28)) {
+                                    GestureSettings.GestureAction.LockScreen
+                                } else {
+                                    GestureSettings.GestureAction.None
+                                }
+                            )
                             .setLongPress(GestureSettings.GestureAction.None)
                             .setSwipeDown(GestureSettings.GestureAction.OpenNotificationDrawer)
                             .setSwipeLeft(GestureSettings.GestureAction.None)