Generate language list compile time (#1561)

* Generate language list compile time

* Add English

app/build.gradle.kts

@@ -18,8 +18,10 @@
  */
 
 import com.android.build.gradle.internal.dsl.BuildType
+import java.io.PrintStream
 import java.nio.file.Paths
 import java.time.Instant
+import java.util.*
 
 plugins {
     id("org.gradle.idea")
@@ -161,6 +163,38 @@ tasks.whenTaskAdded {
     }
 }
 
+afterEvaluate {
+    android.applicationVariants.forEach { variant ->
+        val outSrcDir = file("$buildDir/generated/source/langList/${variant.name}")
+        val outSrc = file("$outSrcDir/org/lsposed/manager/util/LangList.java")
+        val genLangList =
+            tasks.register("generate${variant.name.capitalize(Locale.ROOT)}LangList") {
+                inputs.files("src/main/res")
+                outputs.file(outSrc)
+                doLast {
+                    val langList = File(projectDir, "src/main/res").listFiles { dir ->
+                        dir.name.startsWith("values-") && File(dir, "strings.xml").exists()
+                    }.orEmpty().map {
+                        it.name.substring(7).split("-", limit = 2)
+                    }.map {
+                        if (it.size == 1) Locale(it[0])
+                        else Locale(it[0], it[1].substring(1))
+                    }.map { it.toLanguageTag() }
+                    PrintStream(outSrc).print(
+                        """
+                        |package org.lsposed.manager.util;
+                        |public final class LangList {
+                        |    public static final String[] LANG_LIST = {"SYSTEM", ${
+                            langList.joinToString(", ") { """"$it"""" }
+                        }};
+                        |}""".trimMargin()
+                    )
+                }
+            }
+        variant.registerJavaGeneratingTask(genLangList, outSrcDir)
+    }
+}
+
 dependencies {
     val glideVersion = "4.12.0"
     val navVersion: String by rootProject.extra

app/src/main/java/org/lsposed/manager/ui/fragment/SettingsFragment.java

@@ -20,8 +20,6 @@
 package org.lsposed.manager.ui.fragment;
 
 import android.content.Context;
-import android.content.res.Configuration;
-import android.content.res.Resources.NotFoundException;
 import android.os.Build;
 import android.os.Bundle;
 import android.provider.Settings;
@@ -49,6 +47,7 @@ import org.lsposed.manager.R;
 import org.lsposed.manager.databinding.FragmentSettingsBinding;
 import org.lsposed.manager.ui.activity.MainActivity;
 import org.lsposed.manager.util.BackupUtils;
+import org.lsposed.manager.util.LangList;
 import org.lsposed.manager.util.NavUtil;
 import org.lsposed.manager.util.ThemeUtil;
 
@@ -255,18 +254,17 @@ public class SettingsFragment extends BaseFragment {
                 var tag = language.getValue();
                 var userLocale = App.getLocale();
                 var entries = new ArrayList<CharSequence>();
-                entries.add(language.getEntries()[0]);
+                var lstLang = LangList.LANG_LIST;
-                var lstLang = getAppLanguages(requireContext(), R.string.Settings);
                 for (var lang : lstLang) {
+                    if (lang.equals(SYSTEM)) {
+                        entries.add(getString(rikka.core.R.string.follow_system));
+                        continue;
+                    }
                     var locale = Locale.forLanguageTag(lang);
-                    entries.add(HtmlCompat.fromHtml(String.format("%s - %s",
+                    entries.add(HtmlCompat.fromHtml(locale.getDisplayName(locale), HtmlCompat.FROM_HTML_MODE_LEGACY));
-                            !TextUtils.isEmpty(locale.getScript()) ? locale.getDisplayScript(locale) : locale.getDisplayName(locale),
-                            !TextUtils.isEmpty(locale.getScript()) ? locale.getDisplayScript(userLocale) : locale.getDisplayName(userLocale)
-                    ), HtmlCompat.FROM_HTML_MODE_LEGACY));
                 }
                 language.setEntries(entries.toArray(new CharSequence[0]));
-                lstLang.add(0, SYSTEM);
+                language.setEntryValues(lstLang);
-                language.setEntryValues(lstLang.toArray(new CharSequence[0]));
                 if (TextUtils.isEmpty(tag) || SYSTEM.equals(tag)) {
                     language.setSummary(getString(rikka.material.R.string.follow_system));
                 } else {
@@ -312,34 +310,5 @@ public class SettingsFragment extends BaseFragment {
             }
             return recyclerView;
         }
-
-        private ArrayList<String> getAppLanguages(Context ctx, int id) {
-            Configuration conf = ctx.getResources().getConfiguration();
-            Locale originalLocale = conf.getLocales().get(0);
-            conf.setLocale(Locale.ENGLISH);
-
-            var lstLang = new ArrayList<String>();
-            lstLang.add(Locale.ENGLISH.getLanguage());
-
-            final String reference;
-            try {
-                reference = ctx.createConfigurationContext(conf).getString(id);
-            } catch (NotFoundException nfe) {
-                return lstLang; // return only english
-            }
-
-            for (String loc : ctx.getAssets().getLocales()) {
-                if (loc.isEmpty()) {
-                    continue;
-                }
-                Locale locale = Locale.forLanguageTag(loc);
-                conf.setLocale(locale);
-                if (!lstLang.contains(loc) && !reference.equals(ctx.createConfigurationContext(conf).getString(id))) {
-                    lstLang.add(loc);
-                }
-            }
-            conf.setLocale(originalLocale);
-            return lstLang;
-        }
     }
 }

app/src/main/res/values-en/strings.xml

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources></resources>

app/src/main/res/values/arrays.xml

@@ -32,10 +32,6 @@
         <item>MODE_NIGHT_FOLLOW_SYSTEM</item>
     </string-array>
 
-    <string-array name="language" translatable="false">
-        <item>@string/follow_system</item>
-    </string-array>
-
     <string-array name="color_values" translatable="false">
         <item>SAKURA</item>
         <item>MATERIAL_RED</item>

app/src/main/res/xml/prefs.xml

@@ -34,7 +34,6 @@
 
         <rikka.preference.SimpleMenuPreference
             android:defaultValue="SYSTEM"
-            android:entries="@array/language"
             android:icon="@drawable/ic_baseline_translate_24"
             android:key="language"
             android:summary="%s"