Restore state when activity is destroyed

- Fixes a bug where developer options would be re-enabled
 if the activity is destroyed when the master switch is set to
 off

Bug: 34203528
Test: Manual testing with screen rotation
Change-Id: Ic8e04858f6e3dd2353feb6fa94be9f420ab8adbb

src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java

@@ -154,6 +154,13 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
         mSwitchBarController = new DevelopmentSwitchBarController(
                 this /* DevelopmentSettings */, mSwitchBar, mIsAvailable, getLifecycle());
         mSwitchBar.show();
+
+        // Restore UI state based on whether developer options is enabled
+        if (DevelopmentSettingsEnabler.isDevelopmentSettingsEnabled(getContext())) {
+            enableDeveloperOptions();
+        } else {
+            disableDeveloperOptions();
+        }
     }
 
     @Override
@@ -197,17 +204,7 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
             if (isChecked) {
                 EnableDevelopmentSettingWarningDialog.show(this /* host */);
             } else {
-                DevelopmentSettingsEnabler.setDevelopmentSettingsEnabled(getContext(), false);
+                disableDeveloperOptions();
-                final SystemPropPoker poker = SystemPropPoker.getInstance();
-                poker.blockPokes();
-                for (AbstractPreferenceController controller : mPreferenceControllers) {
-                    if (controller instanceof DeveloperOptionsPreferenceController) {
-                        ((DeveloperOptionsPreferenceController) controller)
-                                .onDeveloperOptionsDisabled();
-                    }
-                }
-                poker.unblockPokes();
-                poker.poke();
             }
         }
     }
@@ -318,7 +315,7 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
         getActivity().unregisterReceiver(mBluetoothA2dpReceiver);
     }
 
-    void onEnableDevelopmentOptionsConfirmed() {
+    private void enableDeveloperOptions() {
         DevelopmentSettingsEnabler.setDevelopmentSettingsEnabled(getContext(), true);
         for (AbstractPreferenceController controller : mPreferenceControllers) {
             if (controller instanceof DeveloperOptionsPreferenceController) {
@@ -327,6 +324,24 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
         }
     }
 
+    private void disableDeveloperOptions() {
+        DevelopmentSettingsEnabler.setDevelopmentSettingsEnabled(getContext(), false);
+        final SystemPropPoker poker = SystemPropPoker.getInstance();
+        poker.blockPokes();
+        for (AbstractPreferenceController controller : mPreferenceControllers) {
+            if (controller instanceof DeveloperOptionsPreferenceController) {
+                ((DeveloperOptionsPreferenceController) controller)
+                        .onDeveloperOptionsDisabled();
+            }
+        }
+        poker.unblockPokes();
+        poker.poke();
+    }
+
+    void onEnableDevelopmentOptionsConfirmed() {
+        enableDeveloperOptions();
+    }
+
     void onEnableDevelopmentOptionsRejected() {
         // Reset the toggle
         mSwitchBar.setChecked(false);