Add language selector (#80), Remove force english language [Beta]

Author: DerGoogler

app/src/main/AndroidManifest.xml

@@ -32,7 +32,8 @@
         android:dataExtractionRules="@xml/data_extraction_rules"
         android:networkSecurityConfig="@xml/network_security_config"
         android:usesCleartextTraffic="false"
-        tools:targetApi="s">
+        tools:targetApi="s"
+        tools:replace="android:supportsRtl">
         <receiver android:name="com.fox2code.mmm.manager.ModuleBootReceive"
             android:exported="true">
             <intent-filter>

app/src/main/java/com/fox2code/mmm/compat/CompatActivity.java

@@ -5,6 +5,7 @@
 import android.content.Context;
 import android.content.ContextWrapper;
 import android.content.Intent;
+import android.content.SharedPreferences;
 import android.content.res.Configuration;
 import android.content.res.Resources;
 import android.graphics.drawable.Drawable;
@@ -36,6 +37,7 @@
 import androidx.core.graphics.ColorUtils;
 import androidx.core.view.WindowInsetsCompat;
 import androidx.fragment.app.Fragment;
+import androidx.preference.PreferenceManager;
 
 import com.fox2code.mmm.Constants;
 import com.fox2code.mmm.R;
@@ -68,6 +70,7 @@ public boolean onBackPressed(CompatActivity compatActivity) {
     private CompatActivity.OnBackPressedCallback onBackPressedCallback;
     private MenuItem.OnMenuItemClickListener menuClickListener;
     private CharSequence menuContentDescription;
+    private SharedPreferences mSharedPreferences;
     @StyleRes
     private int setThemeDynamic = 0;
     private boolean onCreateCalledOnce = false;
@@ -546,6 +549,14 @@ public static CompatActivity getCompatActivity(Context context) {
         return (CompatActivity) context;
     }
 
+    @Override
+    protected void attachBaseContext(Context newBase) {
+        mSharedPreferences= PreferenceManager.getDefaultSharedPreferences(newBase);
+        Locale locale = new Locale(mSharedPreferences.getString("user_preferred_language", "en"));
+        Context context = CompatWrapper.setLocale(newBase, locale);
+        super.attachBaseContext(context);
+    }
+
     public WeakReference<CompatActivity> asWeakReference() {
         return this.selfReference;
     }

app/src/main/java/com/fox2code/mmm/compat/CompatWrapper.java

@@ -0,0 +1,40 @@
+package com.fox2code.mmm.compat;
+
+import android.content.Context;
+import android.content.ContextWrapper;
+import android.content.res.Configuration;
+import android.content.res.Resources;
+import android.os.Build;
+import android.os.LocaleList;
+
+import java.util.Locale;
+
+public class CompatWrapper extends android.content.ContextWrapper {
+
+    public CompatWrapper(Context base) {
+        super(base);
+    }
+
+    public static ContextWrapper setLocale(Context context, Locale newLocale) {
+
+        Resources res = context.getResources();
+        Configuration configuration = res.getConfiguration();
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+            configuration.setLocale(newLocale);
+
+            LocaleList localeList = new LocaleList(newLocale);
+            LocaleList.setDefault(localeList);
+            configuration.setLocales(localeList);
+
+            context = context.createConfigurationContext(configuration);
+
+        } else {
+            configuration.setLocale(newLocale);
+            context = context.createConfigurationContext(configuration);
+
+        }
+
+        return new ContextWrapper(context);
+    }
+}

app/src/main/java/com/fox2code/mmm/settings/SettingsActivity.java

@@ -13,6 +13,7 @@
 import androidx.preference.PreferenceFragmentCompat;
 import androidx.preference.TwoStatePreference;
 
+import com.ahmedjazzar.rosetta.LanguageSwitcher;
 import com.fox2code.mmm.AppUpdateManager;
 import com.fox2code.mmm.BuildConfig;
 import com.fox2code.mmm.Constants;
@@ -29,6 +30,9 @@
 import com.mikepenz.aboutlibraries.LibsBuilder;
 import com.topjohnwu.superuser.internal.UiThreadHandler;
 
+import java.util.HashSet;
+import java.util.Locale;
+
 public class SettingsActivity extends CompatActivity {
     private static int devModeStep = 0;
 
@@ -89,24 +93,28 @@ public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
                 disableMonet.setEnabled(false);
             }
 
-            Preference forceEnglish = findPreference("pref_force_english");
-            forceEnglish.setOnPreferenceChangeListener((preference, newValue) -> {
-                CompatThemeWrapper compatThemeWrapper =
-                        MainApplication.getINSTANCE().getMarkwonThemeContext();
-                if (compatThemeWrapper != null) {
-                    compatThemeWrapper.setForceEnglish(
-                            Boolean.parseBoolean(String.valueOf(newValue)));
-                }
-                return true;
-            });
-            if (!MainApplication.isDeveloper()) {
-                forceEnglish.setVisible(false);
-            }
             findPreference("pref_dns_over_https").setOnPreferenceChangeListener((p, v) -> {
                 Http.setDoh((Boolean) v);
                 return true;
             });
 
+            // This is the locale that you wanna your app to launch with.
+            Locale firstLaunchLocale = new Locale("en");
+
+            HashSet<Locale> supportedLocales = new HashSet<>();
+            supportedLocales.add(Locale.US);
+            supportedLocales.add(Locale.CHINA);
+            supportedLocales.add(Locale.GERMAN);
+            supportedLocales.add(firstLaunchLocale);
+
+            Preference languageSelector = findPreference("pref_language_selector");
+            languageSelector.setOnPreferenceClickListener(preference -> {
+                LanguageSwitcher ls = new LanguageSwitcher(getActivity(), firstLaunchLocale);
+                ls.showChangeLanguageDialog(getActivity());
+                ls.setSupportedLocales(supportedLocales);
+                return true;
+            });
+
             int nightModeFlags =
                     getContext().getResources().getConfiguration().uiMode &
                             Configuration.UI_MODE_NIGHT_MASK;

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

@@ -31,9 +31,11 @@
     <string name="require_android_6">Requires Android 6.0+</string>
     <string name="require_android_12">Requires Android 12+</string>
     <string name="install_terminal_reboot_now">Reboot</string>
+    <string name="language">Language</string>
     <string name="yes" translatable="false">@android:string/yes</string>
     <string name="no" translatable="false">@android:string/no</string>
     <string name="ok" translatable="false">@android:string/ok</string>
+    <string name="cancel" translatable="false">@android:string/cancel</string>
 
     <!-- Module section translation -->
     <string name="module_last_update">Last version:</string>

app/src/main/res/xml/root_preferences.xml

@@ -43,20 +43,18 @@
             app:entryValues="@array/theme_values"
             app:singleLineTitle="false"	/>
 
+        <Preference
+            app:key="pref_language_selector"
+            app:icon="@drawable/ic_baseline_language_24"
+            app:title="@string/language"	/>
+
         <SwitchPreferenceCompat
             app:defaultValue="false"
             app:key="pref_enable_blur"
             app:icon="@drawable/ic_baseline_blur_on_24"
             app:title="@string/enable_blur_pref"
             app:singleLineTitle="false" />
 
-        <SwitchPreferenceCompat
-            app:defaultValue="false"
-            app:key="pref_force_english"
-            app:icon="@drawable/ic_baseline_language_24"
-            app:title="@string/force_english_pref"
-            app:singleLineTitle="false" />
-
         <SwitchPreferenceCompat
             app:defaultValue="false"
             app:key="pref_force_dark_terminal"