diff --git a/res/menu/language_selection_list.xml b/res/menu/language_selection_list.xml
new file mode 100644
index 00000000000..799d3c97c4a
--- /dev/null
+++ b/res/menu/language_selection_list.xml
@@ -0,0 +1,25 @@
+
+
+
+
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 8b5e63f4329..54b7f67b338 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -402,6 +402,18 @@
All languages
+
+ Suggested
+
+
+ All languages
+
+
+ All regions
+
+
+ All numbering systems
+
System language
@@ -450,6 +462,15 @@
This language can’t be used as a system language, but you’ve let apps and websites know you prefer this language.
+
+ Search
+
+ Add a language
+
+ Region preference
+
+ Type language name
+
Regional preferences
diff --git a/res/xml/system_language_picker.xml b/res/xml/system_language_picker.xml
new file mode 100644
index 00000000000..cccf56ea063
--- /dev/null
+++ b/res/xml/system_language_picker.xml
@@ -0,0 +1,30 @@
+
+
+
+
+
+
+
+
+
+
diff --git a/src/com/android/settings/localepicker/SystemLocalePickerFragment.java b/src/com/android/settings/localepicker/SystemLocalePickerFragment.java
new file mode 100644
index 00000000000..df3ae8454f4
--- /dev/null
+++ b/src/com/android/settings/localepicker/SystemLocalePickerFragment.java
@@ -0,0 +1,281 @@
+/**
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.localepicker;
+
+import android.app.Activity;
+import android.app.settings.SettingsEnums;
+import android.content.Context;
+import android.os.Bundle;
+import android.text.TextUtils;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Filter;
+import android.widget.SearchView;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.core.view.ViewCompat;
+import androidx.preference.PreferenceCategory;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.android.internal.app.LocaleHelper;
+import com.android.internal.app.LocaleStore;
+import com.android.internal.app.SystemLocaleCollector;
+import com.android.settings.R;
+import com.android.settings.dashboard.DashboardFragment;
+import com.android.settings.search.BaseSearchIndexProvider;
+import com.android.settingslib.core.AbstractPreferenceController;
+import com.android.settingslib.core.lifecycle.Lifecycle;
+
+import com.google.android.material.appbar.AppBarLayout;
+
+import org.jetbrains.annotations.NotNull;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Locale;
+import java.util.Set;
+
+/**
+ * A locale picker fragment to show system languages.
+ *
+ * It shows suggestions at the top, then the rest of the locales.
+ * Allows the user to search for locales using both their native name and their name in the
+ * default locale.
+ */
+public class SystemLocalePickerFragment extends DashboardFragment implements
+ SearchView.OnQueryTextListener, MenuItem.OnActionExpandListener {
+
+ private static final String TAG = "SystemLocalePickerFragment";
+ private static final String EXTRA_EXPAND_SEARCH_VIEW = "expand_search_view";
+
+ @Nullable private SearchView mSearchView = null;
+ @Nullable private SearchFilter mSearchFilter = null;
+ @Nullable private Set mLocaleList;
+ @Nullable private List mLocaleOptions;
+ @Nullable private List mOriginalLocaleInfos;
+ private AppBarLayout mAppBarLayout;
+ private RecyclerView mRecyclerView;
+ private Activity mActivity;
+ private boolean mExpandSearch;
+
+ @Override
+ public void onCreate(@NonNull Bundle icicle) {
+ super.onCreate(icicle);
+ mActivity = getActivity();
+ if (mActivity.isFinishing()) {
+ return;
+ }
+ setHasOptionsMenu(true);
+
+ mExpandSearch = mActivity.getIntent().getBooleanExtra(EXTRA_EXPAND_SEARCH_VIEW, false);
+ if (icicle != null) {
+ mExpandSearch = icicle.getBoolean(EXTRA_EXPAND_SEARCH_VIEW);
+ }
+
+ SystemLocaleCollector systemLocaleCollector = new SystemLocaleCollector(getContext(), null);
+ mLocaleList = systemLocaleCollector.getSupportedLocaleList(null, false, false);
+ mLocaleOptions = new ArrayList<>(mLocaleList.size());
+ }
+
+ @Override
+ public @NonNull View onCreateView(@NonNull LayoutInflater inflater,
+ @NonNull ViewGroup container, @NonNull Bundle savedInstanceState) {
+ mAppBarLayout = mActivity.findViewById(R.id.app_bar);
+ return super.onCreateView(inflater, container, savedInstanceState);
+ }
+
+ @Override
+ public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
+ super.onViewCreated(view, savedInstanceState);
+ mRecyclerView = view.findViewById(R.id.recycler_view);
+ }
+
+ @Override
+ public void onSaveInstanceState(@NonNull Bundle outState) {
+ super.onSaveInstanceState(outState);
+ if (mSearchView != null) {
+ outState.putBoolean(EXTRA_EXPAND_SEARCH_VIEW, !mSearchView.isIconified());
+ }
+ }
+
+ @Override
+ public void onCreateOptionsMenu(@NonNull Menu menu, @NonNull MenuInflater inflater) {
+ super.onCreateOptionsMenu(menu, inflater);
+ inflater.inflate(R.menu.language_selection_list, menu);
+ final MenuItem searchMenuItem = menu.findItem(R.id.locale_search_menu);
+ if (searchMenuItem != null) {
+ searchMenuItem.setOnActionExpandListener(this);
+ mSearchView = (SearchView) searchMenuItem.getActionView();
+ mSearchView.setQueryHint(
+ getContext().getResources().getText(R.string.search_language_hint));
+ mSearchView.setOnQueryTextListener(this);
+ mSearchView.setMaxWidth(Integer.MAX_VALUE);
+ if (mExpandSearch) {
+ searchMenuItem.expandActionView();
+ }
+ }
+ }
+
+ private void filterSearch(@Nullable String query) {
+ if (mSearchFilter == null) {
+ mSearchFilter = new SearchFilter();
+ }
+
+ // TODO: b/30358431 - Add preference of system locales.
+ // mOriginalLocaleInfos = mSystemLocaleAllListPreferenceController.getSupportedLocaleList();
+ // If we haven't load apps list completely, don't filter anything.
+ if (mOriginalLocaleInfos == null) {
+ Log.w(TAG, "Locales haven't loaded completely yet, so nothing can be filtered");
+ return;
+ }
+ mSearchFilter.filter(query);
+ }
+
+ private class SearchFilter extends Filter {
+
+ @Override
+ protected FilterResults performFiltering(CharSequence prefix) {
+ FilterResults results = new FilterResults();
+
+ if (mOriginalLocaleInfos == null) {
+ mOriginalLocaleInfos = new ArrayList<>(mLocaleList);
+ }
+
+ if (TextUtils.isEmpty(prefix)) {
+ results.values = mOriginalLocaleInfos;
+ results.count = mOriginalLocaleInfos.size();
+ } else {
+ // TODO: decide if we should use the string's locale
+ Locale locale = Locale.getDefault();
+ String prefixString = LocaleHelper.normalizeForSearch(prefix.toString(), locale);
+
+ final int count = mOriginalLocaleInfos.size();
+ final ArrayList newValues = new ArrayList<>();
+
+ for (int i = 0; i < count; i++) {
+ final LocaleStore.LocaleInfo value = mOriginalLocaleInfos.get(i);
+ final String nameToCheck = LocaleHelper.normalizeForSearch(
+ value.getFullNameInUiLanguage(), locale);
+ final String nativeNameToCheck = LocaleHelper.normalizeForSearch(
+ value.getFullNameNative(), locale);
+ if ((wordMatches(nativeNameToCheck, prefixString)
+ || wordMatches(nameToCheck, prefixString)) && !newValues.contains(
+ value)) {
+ newValues.add(value);
+ }
+ }
+
+ results.values = newValues;
+ results.count = newValues.size();
+ }
+
+ return results;
+ }
+
+ @Override
+ protected void publishResults(CharSequence constraint, FilterResults results) {
+ mLocaleOptions = (ArrayList) results.values;
+ // Need to scroll to first preference when searching.
+ if (mRecyclerView != null) {
+ mRecyclerView.post(() -> mRecyclerView.scrollToPosition(0));
+ }
+ // TODO: b/30358431 - Add preference of system locales.
+ // mSystemLocaleAllListPreferenceController.onSearchListChanged(mLocaleOptions);
+ // mSuggestedListPreferenceController.onSearchListChanged(mLocaleOptions);
+ }
+
+ // TODO: decide if this is enough, or we want to use a BreakIterator...
+ private boolean wordMatches(String valueText, String prefixString) {
+ if (valueText == null) {
+ return false;
+ }
+
+ // First match against the whole, non-split value
+ if (valueText.startsWith(prefixString)) {
+ return true;
+ }
+
+ return Arrays.stream(valueText.split(" "))
+ .anyMatch(word -> word.startsWith(prefixString));
+ }
+ }
+
+ @Override
+ public boolean onMenuItemActionExpand(@NonNull MenuItem item) {
+ // To prevent a large space on tool bar.
+ mAppBarLayout.setExpanded(false /*expanded*/, false /*animate*/);
+ // To prevent user can expand the collapsing tool bar view.
+ ViewCompat.setNestedScrollingEnabled(mRecyclerView, false);
+ return true;
+ }
+
+ @Override
+ public boolean onMenuItemActionCollapse(@NonNull MenuItem item) {
+ // We keep the collapsed status after user cancel the search function.
+ mAppBarLayout.setExpanded(false /*expanded*/, false /*animate*/);
+ ViewCompat.setNestedScrollingEnabled(mRecyclerView, true);
+ return true;
+ }
+
+ @Override
+ public boolean onQueryTextSubmit(@Nullable String query) {
+ return false;
+ }
+
+ @Override
+ public boolean onQueryTextChange(@Nullable String newText) {
+ filterSearch(newText);
+ return false;
+ }
+
+ @Override
+ protected String getLogTag() {
+ return TAG;
+ }
+
+ @Override
+ public int getMetricsCategory() {
+ return SettingsEnums.USER_LOCALE_LIST;
+ }
+
+ @Override
+ protected int getPreferenceScreenResId() {
+ return R.xml.system_language_picker;
+ }
+
+ @Override
+ protected List createPreferenceControllers(Context context) {
+ return buildPreferenceControllers(context, getSettingsLifecycle());
+ }
+
+ private List buildPreferenceControllers(
+ @NonNull Context context, @Nullable Lifecycle lifecycle) {
+ final List controllers = new ArrayList<>();
+ // TODO: b/30358431 - Add preference of system locales.
+ return controllers;
+ }
+
+ public static final BaseSearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
+ new BaseSearchIndexProvider(R.xml.system_language_picker);
+}