App Language resets to default when app is Killed

Question

Hi I have an App which is a loads a webview and there's a FLOWING DRAWER in it. I am trying to change the locale. I have a localeHelper java class and an AppClass which extends Application

But its just not happening.

What happens is the locale changes only when I restart the app super.Onbackpressed() but when I kills it ~ the locale turns back to english; it resets

I have been going mad from around 4 days.

Please help me, I'm a beginner;

localeHelp.java

public class LocaleHelper {

    private static final String SELECTED_LANGUAGE = "Locale.Helper.Selected.Language";

    public static Context onAttach(Context context) {
        String lang = getPersistedData(context, Locale.getDefault().getLanguage());
        return setLocale(context, lang);
    }

    public static Context onAttach(Context context, String defaultLanguage) {
        String lang = getPersistedData(context, defaultLanguage);
        return setLocale(context, lang);
    }

    public static String getLanguage(Context context) {
        return getPersistedData(context, Locale.getDefault().getLanguage());
    }

    public static Context setLocale(Context context, String language) {
        persist(context, language);

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            return updateResources(context, language);
        }

        return updateResourcesLegacy(context, language);
    }

    private static String getPersistedData(Context context, String defaultLanguage) {
        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
        return preferences.getString(SELECTED_LANGUAGE, defaultLanguage);
    }

    private static void persist(Context context, String language) {
        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
        SharedPreferences.Editor editor = preferences.edit();

        editor.putString(SELECTED_LANGUAGE, language);
        editor.apply();
    }

    @TargetApi(Build.VERSION_CODES.N)
    private static Context updateResources(Context context, String language) {
        Locale locale = new Locale(language);
        Locale.setDefault(locale);

        Configuration configuration = context.getResources().getConfiguration();
        configuration.setLocale(locale);
        configuration.setLayoutDirection(locale);

        return context.createConfigurationContext(configuration);
    }

    @SuppressWarnings("deprecation")
    private static Context updateResourcesLegacy(Context context, String language) {
        Locale locale = new Locale(language);
        Locale.setDefault(locale);

        Resources resources = context.getResources();

        Configuration configuration = resources.getConfiguration();
        configuration.locale = locale;
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
            configuration.setLayoutDirection(locale);
        }

        resources.updateConfiguration(configuration, resources.getDisplayMetrics());

        return context;
    }
}

simply calling setLocale("fr"); with this function in MainActivity

 private void setLocale() {
        Locale locale;
        locale = new Locale("hi");
        Locale.setDefault(locale);
        Configuration config = new Configuration();
        config.locale = locale;


        getBaseContext().getResources().updateConfiguration(config,
                getBaseContext().getResources().getDisplayMetrics());
       Intent intent = getIntent();
       finish();

       startActivity(intent);}

Answer 1

The problem: activity was recreated but the language was still the same.. Okay so after much trial and error this is what I got to work..

I put this code in OnResume

// todo load locale
        Locale current = getResources().getConfiguration().locale; 
 // todo get the current locale

        //Toast.makeText(MainActivity.this, ""+current, Toast.LENGTH_SHORT).show();
        String currentLanginString = current.toString(); // convert current language to string
        if(!currentLanginString.contains(wholeAppLanguage)) {
            recreate();
           // Toast.makeText(this, "recreatingResume", Toast.LENGTH_SHORT).show();
        }
        loadLocale();

and then I created the Loadlocale function

 public void loadLocale (){


        int langcode=0;
        String a="a";
        if (wholeAppLanguage.contains("hi")) {
            langcode = 0;
            a="hi";
        }
        else if (wholeAppLanguage.contains("en"))
        {
            langcode=1;
            a="en";
        }

        setLocale2(langcode);


    }

then it worked perfectly~

Answer 2

I also experienced the same problem of language getting reset after app kill, However, this solution worked for me.

Summary:

• Override attachBaseContext method in all activities and application class.
• Save/Load the language preference to/from SharedPreferences.