Catalyst framework integration

Bug: 335132588
Flag: com.android.settingslib.flags.settings_catalyst
Test: Presubmit
Change-Id: Ic0f0193fd5cee144f2fab36ae5190156efb7bd10

src/com/android/settings/SettingsApplication.java

@@ -16,6 +16,8 @@
 
 package com.android.settings;
 
+import static com.android.settingslib.flags.Flags.settingsCatalyst;
+
 import android.app.Application;
 import android.content.Context;
 import android.content.pm.PackageManager;
@@ -42,13 +44,20 @@ import com.android.settings.overlay.FeatureFactoryImpl;
 import com.android.settings.spa.SettingsSpaEnvironment;
 import com.android.settingslib.applications.AppIconCacheManager;
 import com.android.settingslib.datastore.BackupRestoreStorageManager;
+import com.android.settingslib.metadata.PreferenceScreenMetadata;
+import com.android.settingslib.metadata.PreferenceScreenRegistry;
+import com.android.settingslib.metadata.ProvidePreferenceScreenOptions;
 import com.android.settingslib.spa.framework.common.SpaEnvironmentFactory;
 
 import com.google.android.setupcompat.util.WizardManagerHelper;
 
 import java.lang.ref.WeakReference;
+import java.util.List;
 
 /** Settings application which sets up activity embedding rules for the large screen device. */
+@ProvidePreferenceScreenOptions(
+        codegenCollector = "com.android.settings/PreferenceScreenCollector/get"
+)
 public class SettingsApplication extends Application {
 
     private WeakReference<SettingsHomepageActivity> mHomeActivity = new WeakReference<>(null);
@@ -64,6 +73,11 @@ public class SettingsApplication extends Application {
     public void onCreate() {
         super.onCreate();
 
+        if (settingsCatalyst()) {
+            PreferenceScreenRegistry.INSTANCE.setPreferenceScreensSupplier(
+                    this::getPreferenceScreens);
+        }
+
         BackupRestoreStorageManager.getInstance(this)
                 .add(
                         new BatterySettingsStorage(this),
@@ -90,6 +104,13 @@ public class SettingsApplication extends Application {
         registerActivityLifecycleCallbacks(new DeveloperOptionsActivityLifecycle());
     }
 
+    /** Returns the screens using metadata. */
+    protected List<PreferenceScreenMetadata> getPreferenceScreens() {
+        // PreferenceScreenCollector is generated by annotation processor from classes annotated
+        // with @ProvidePreferenceScreen
+        return PreferenceScreenCollector.get(this);
+    }
+
     @Override
     public void onTerminate() {
         BackupRestoreStorageManager.getInstance(this).removeAll();