Change app language programmatically in Android

Question

Is it possible to change the language of an app programmatically while still using Android resources?

If not, is it possible to request a resource in an specific lan

Answer 1

similar to the accepted answered but 2017 version and added restart (without restarting, sometimes the next Activity still renders English):

// Inside some activity...
private void changeDisplayLanguage(String langCode) {
// Step 1. Change the locale in the app's configuration
    Resources res = getResources();
    android.content.res.Configuration conf = res.getConfiguration();
    conf.setLocale(currentLocale);
    createConfigurationContext(conf);
// Step 2. IMPORTANT! you must restart the app to make sure it works 100%
    restart();
}
private void restart() {
    PackageManager packageManager = getPackageManager();
    Intent intent = packageManager.getLaunchIntentForPackage(getPackageName());
    ComponentName componentName = intent.getComponent();
    Intent mainIntent = IntentCompat.makeRestartActivityTask(componentName);
    mainIntent.putExtra("app_restarting", true);
    PrefUtils.putBoolean("app_restarting", true);
    startActivity(mainIntent);
    System.exit(0);
}