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    <p>Through the original question is not exactly about the locale itself all other locale related questions are referencing to this one. That's why I wanted to clarify the issue here. I used this question as a starting point for my own locale switching code and found out that the method is not exactly correct. It works, but only until any configuration change (e.g. screen rotation) and only in that particular Activity. Playing with a code for a while I have ended up with the following approach:</p> <p>I have extended android.app.Application and added the following code:</p> <pre><code>public class MyApplication extends Application { private Locale locale = null; @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); if (locale != null) { newConfig.locale = locale; Locale.setDefault(locale); getBaseContext().getResources().updateConfiguration(newConfig, getBaseContext().getResources().getDisplayMetrics()); } } @Override public void onCreate() { super.onCreate(); SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(this); Configuration config = getBaseContext().getResources().getConfiguration(); String lang = settings.getString(getString(R.string.pref_locale), ""); if (! "".equals(lang) &amp;&amp; ! config.locale.getLanguage().equals(lang)) { locale = new Locale(lang); Locale.setDefault(locale); config.locale = locale; getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics()); } } } </code></pre> <p>This code ensures that every Activity will have custom locale set and it will not be reset on rotation and other events. </p> <p>I have also spent a lot of time trying to make the preference change to be applied immediately but didn't succeed: the language changed correctly on Activity restart, but number formats and other locale properties were not applied until full application restart.</p> <h3>Changes to <code>AndroidManifest.xml</code></h3> <p>Don't forget to add <code>android:configChanges="layoutDirection|locale"</code> to every activity at AndroidManifest, as well as the <code>android:name=".MyApplication"</code> to the <code>&lt;application&gt;</code> element.</p>
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    1. POChanging Locale within the app itself
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    1. USAndrey Novikov
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    1. COIs you preference activity being called from you main activity? you could place this in the on resume... @Override protected void onResume() { if (!(PreferenceManager.getDefaultSharedPreferences( getApplicationContext()).getString("listLanguage", "en") .equals(langPreference))) { refresh(); } super.onResume(); } private void refresh() { finish(); Intent myIntent = new Intent(Main.this, Main.class); startActivity(myIntent); }
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      1. UStrgraglia
    2. COThis is actually what I need, I used to to call updateConfiguration() in MainActivity but the menus doesn't update when Application terminates then starts. You solution is right. If you want to refresh strings immediately, I think you still must reset strings manually. (e.g reset button label or recreate menu).
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      1. USEmerald Hieu
    3. CODoes this interferre with Android system locale?
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