Android: Split settings into tabs

android/app/src/main/java/com/github/stenzek/duckstation/SettingsActivity.java

@@ -1,12 +1,22 @@
 package com.github.stenzek.duckstation;
 
 import android.os.Bundle;
+import android.view.LayoutInflater;
 import android.view.MenuItem;
+import android.view.View;
+import android.view.ViewGroup;
 
 import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
 import androidx.appcompat.app.ActionBar;
 import androidx.appcompat.app.AppCompatActivity;
+import androidx.fragment.app.Fragment;
 import androidx.preference.PreferenceFragmentCompat;
+import androidx.viewpager2.adapter.FragmentStateAdapter;
+import androidx.viewpager2.widget.ViewPager2;
+
+import com.google.android.material.tabs.TabLayout;
+import com.google.android.material.tabs.TabLayoutMediator;
 
 public class SettingsActivity extends AppCompatActivity {
 
@@ -16,7 +26,7 @@ public class SettingsActivity extends AppCompatActivity {
         setContentView(R.layout.settings_activity);
         getSupportFragmentManager()
                 .beginTransaction()
-                .replace(R.id.settings, new SettingsFragment())
+                .replace(R.id.settings, new SettingsCollectionFragment())
                 .commit();
         ActionBar actionBar = getSupportActionBar();
         if (actionBar != null) {
@@ -35,9 +45,72 @@ public class SettingsActivity extends AppCompatActivity {
     }
 
     public static class SettingsFragment extends PreferenceFragmentCompat {
+        private int resourceId;
+        public SettingsFragment(int resourceId) {
+            this.resourceId = resourceId;
+        }
+
         @Override
         public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
-            setPreferencesFromResource(R.xml.root_preferences, rootKey);
+            setPreferencesFromResource(resourceId, rootKey);
+        }
+    }
+
+    public static class SettingsCollectionFragment extends Fragment {
+        private SettingsCollectionAdapter adapter;
+        private ViewPager2 viewPager;
+
+        @Nullable
+        @Override
+        public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
+            return inflater.inflate(R.layout.fragment_settings_collection, container, false);
+        }
+
+        @Override
+        public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
+            adapter = new SettingsCollectionAdapter(this);
+            viewPager = view.findViewById(R.id.view_pager);
+            viewPager.setAdapter(adapter);
+
+            TabLayout tabLayout = view.findViewById(R.id.tab_layout);
+            new TabLayoutMediator(tabLayout, viewPager,
+                    (tab, position) -> tab.setText(getResources().getStringArray(R.array.settings_tabs)[position])
+            ).attach();
+        }
+    }
+
+    public static class SettingsCollectionAdapter extends FragmentStateAdapter {
+        public SettingsCollectionAdapter(@NonNull Fragment fragment) {
+            super(fragment);
+        }
+
+        @NonNull
+        @Override
+        public Fragment createFragment(int position) {
+            switch (position) {
+                case 0:     // General
+                    return new SettingsFragment(R.xml.general_preferences);
+
+                case 1:     // Console
+                    return new SettingsFragment(R.xml.display_preferences);
+
+                case 2:     // Enhancements
+                    return new SettingsFragment(R.xml.enhancements_preferences);
+
+                case 3:     // Controllers
+                    return new SettingsFragment(R.xml.controllers_preferences);
+
+                case 4:     // Advanced
+                    return new SettingsFragment(R.xml.advanced_preferences);
+
+                default:
+                    return new Fragment();
+            }
+        }
+
+        @Override
+        public int getItemCount() {
+            return 5;
         }
     }
 }