Change language in android application resources

Question

after studying about supporting multiple languages in android application, i have good the basic idea about how i can make resources for different languages within application, for example i want to add Spanish language in my application so in res direction within my application i have added values-en directory and in that direct i have added strings resource and within that resource i have added strings with values of Spanish text, in my application default language is English now i want to know how can i switch it to Spanish, i have the resources ready i just need to change my application language to Spanish

Check this http://stackoverflow.com/questions/2900023/change-language-programmatically-in-android — Ninja, Mar 25 '17 at 08:49
`i want to add Spanish language in my application so in res direction within my application i have added values-en directory` **WRONG**: you should have added `values-es`. — Phantômaxx, Mar 25 '17 at 08:49

score 0 · Accepted Answer · edited May 23 '17 at 11:54

Use below code in your onCreate() after setContentView:

String languageToLoad = "es";
Locale locale = new Locale(languageToLoad);
Configuration config = new Configuration();
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());

You also have to change your value folder to values-es. values-en is for English. Hope this helps.

To change App locale follow below code:

1) Create LocaleUtils class:

public class LocaleUtils {

    private static Locale sLocale;

    public static void setLocale(Locale locale) {
        sLocale = locale;
        if(sLocale != null) {
            Locale.setDefault(sLocale);
        }
    }

    public static void updateConfig(ContextThemeWrapper wrapper) {
        if(sLocale != null && Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
            Configuration configuration = new Configuration();
            configuration.setLocale(sLocale);
            wrapper.applyOverrideConfiguration(configuration);
        }
    }

    public static void updateConfig(Application app, Configuration configuration) {
        if (sLocale != null && Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR1) {
            //Wrapping the configuration to avoid Activity endless loop
            Configuration config = new Configuration(configuration);
            // We must use the now-deprecated config.locale and res.updateConfiguration here,
            // because the replacements aren't available till API level 24 and 17 respectively.
            config.locale = sLocale;
            Resources res = app.getBaseContext().getResources();
            res.updateConfiguration(config, res.getDisplayMetrics());
        }
    }
}

2) In Application Class:

public class YourAppName extends Application {
    public void onCreate(){
        super.onCreate();

        LocaleUtils.setLocale(new Locale("es"));
        LocaleUtils.updateConfig(this, getBaseContext().getResources().getConfiguration());
    }

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        LocaleUtils.updateConfig(this, newConfig);
    }
}

3) Remember, Your Application class name and <application android:name=".YourAppName"> should be same. Otherwise it won't work. Kudos to this answer.

it will change application language or current activity ? and should i do this in MainActivity or in Application Activity ? — user7661245, Mar 25 '17 at 08:53
It will change the language of current activity. Do you want to change language of whole app at a time? Then you have to configure the Application class. — tahsinRupam, Mar 25 '17 at 08:55
this code executes well in MainAcitivty but when i execute it in Application class i get this error " Attempt to invoke virtual method 'android.content.res.Resources android.content.Context.getResources()' on a null object reference" — user7661245, Mar 25 '17 at 09:17

Change language in android application resources

1 Answers1