Multiple language application

Multiple language application

This below code is use to change application language.

Set strings in string.xml file

<string name="english">en</string>
<string name="arabic">ar</string>

Add method in Utils.java class

/**
* Change language
* @param context
* @param locale for ex. "en", "ar"
*/
public static void forcefullyLocaleChange(Context context, String locale) {

    Locale.setDefault(new Locale(locale));
    Resources res = context.getResources();
    DisplayMetrics dm = res.getDisplayMetrics();
    Configuration conf = res.getConfiguration();

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
        conf.setLocale(new Locale(locale));
    } else {
        conf.locale = new Locale(locale);
    }

    res.updateConfiguration(conf, dm);
    Log.d("LANGUAGE", getCurrentLanguage());
}

Add this code in your activity file

/** 
* By selecting language call this method and pass selected language
* @param language for ex. "en", "ar"
**/
private void changeLanguage(String language) {
    // get last selected language
    String lastLanguage = SharedPrefUtils.getPreference(context, getString(R.string.pref_locale), "");

    // check last language is not null and not same as selected language
    if (lastLanguage != null && !TextUtils.equals(lastLanguage, language)) {
        // set language in localisation
        Utils.forcefullyLocaleChange(context, language);

        // save language into shared preference file
        SharedPrefUtils.setPreference(context, getString(R.string.pref_locale), language);

        // start self activity to display language change
        restartActivity();
    }
}

private void restartActivity() {
    Intent intent = getIntent();
    supportFinishAfterTransition();
    startActivity(intent);
}