Force RTL layout direction not working for app

Question

I\'m trying to add RTL language support in my app (specifically Arabic right now). I\'ll be supporting English as well. What I\'ve done:

• Set minSdkVersion to 1

Answer 1

Try this...

1. Create a class to maintain global application state.

   public class YourGlobalClass extends Application {
   
     @Override
     public void onCreate() {
     updateLanguage(this, null);
     super.onCreate();
     }
   
   public static void updateLanguage(Context ctx, String lang) {
   
    Configuration cfg = new Configuration();
    LocalSharedManager manager = new LocalSharedManager(ctx);
    String language = manager.GetValueFromSharedPrefs("force_locale");
   
       if (TextUtils.isEmpty(language) && lang == null) {
          cfg.locale = Locale.getDefault();
          String tmp_locale = "";
          tmp_locale = Locale.getDefault().toString().substring(0, 2);
          manager.SaveValueToSharedPrefs("force_locale", tmp_locale);
   
      } else if (lang != null) {
          cfg.locale = new Locale(lang);
          manager.SaveValueToSharedPrefs("force_locale", lang);
   
      } else if (!TextUtils.isEmpty(language)) {
          cfg.locale = new Locale(language);
      }
      ctx.getResources().updateConfiguration(cfg, null);
     }
   
   }
   

2. Specify global class to your AndroidManifest.xml's tag, which will cause that class to be instantiated with your saved locale, when the process for your application/package is created. Like, android:name="com.your.package.YourGlobalClass" android:supportsRtl="true"

3. Create following two methods in your MainActivity.java (wherever you want).

   public class MainActivity extends ActionBarActivity{
   
      .......
   
      // Implement OnclickListener for english_locale button
      findViewById(R.id.english_locale).setOnClickListener(new OnClickListener()
        {
   
           @Override
           public void onClick(View v)
           {
               changeEnglish();
           }
        });
   
       // Implement OnclickListener for arabic_locale button
       findViewById(R.id.arabic_locale).setOnClickListener(new OnClickListener()
          {
   
             @Override
             public void onClick(View v)
              {
                 changeArabic();
               }
          });
   
       /**
       * Method that Update UI for Arabic locale.
       */
       public void changeArabic() {
            new AsyncTask() {
   
            @Override
            protected Void doInBackground(Void... params) {
                 String app_locale = "ar";
                 Locale locale = new Locale(app_locale);
                 Locale.setDefault(locale);
   
                 //Configuration to query the current layout direction.
                 Configuration config = new Configuration();
                 config.locale = locale;
                 getResources().updateConfiguration(config,
                   getResources().getDisplayMetrics());
                 Bidi bidi = new Bidi(app_locale,
                   Bidi.DIRECTION_DEFAULT_RIGHT_TO_LEFT);
                 bidi.isRightToLeft();
                 YourGlobalClass.updateLanguage(getActivity(), "ar");
   
                 //Refreshing current fragment
   
                 Intent i = getActivity().getIntent();
                 startActivity(i);
                 getActivity().finish();
              return null;
             }
   
          }.execute();
        }
   
           /**
           * Method that Update UI for Default(English) locale.
           */
         public void changeEnglish() {
   
             new AsyncTask() {
   
             @Override
             protected Void doInBackground(Void... params) {
                 String app_locale = "en";
                 Locale locale = new Locale(app_locale);
                 Locale.setDefault(locale);
   
                 //Configuration to query the current layout direction.
                 Configuration config = new Configuration();
                 config.locale = locale;
                 getResources().updateConfiguration(config,
                   getResources().getDisplayMetrics());
                 Bidi bidi = new Bidi(app_locale,
                   Bidi.DIRECTION_DEFAULT_LEFT_TO_RIGHT);
                 bidi.isLeftToRight();
                 YourGlobalClass.updateLanguage(getActivity(), "en");
   
                 //Refreshing current fragment
                 Intent i = getActivity().getIntent();
                 startActivity(i);
                 getActivity().finish();
   
             return null;
             }
   
          }.execute();
        }
   
      ......
     //MainActivity end
   }
   

4. Happy coding...