Develop Reference

Is it possible to set a single default locale for an app?

I'm making an app which supports only 1 language which is RTL, but my device that i debug with locale is en-us, which makes it different from a user in the locale it's meant to be used in.
Is it possible to set a locale for the app so all the users will see the same thing?
I want to do this because i use some libraries that display strings based on the locale.

You can change your app locale configs using this
If you want to use RTL design and language change Locale instructor parameter to "ar" that means Arabic or "fa" means Farsi or etc.
Locale locale = new Locale("en");
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
context.getResources().updateConfiguration(config, context.getResources().getDisplayMetrics());

How to load alternative strings.xml from resources programmatically

I want to provide three different langauges. The default language is english so all my string values in the values folder are in enlish. I created two other folders
values-de for the german language
values-cn for the chinese language
each folder contains a strings.xml file where i defined the values in german for the de folder and in chinese for the cn folder.
My question now is: How can i load a different language programmatically because i want to provide buttons in my app interface where the user can switch the language. The settings of the device wont be editable for our users. Our users can just see the app itself and nothing else so i have to provide the language switching from within my application.

You can change the configuration at runtime
Do this in onCreate of the activity
String languageToUse = "de"; // The language you want to change
Locale locale = new Locale(languageToUse);
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config,
getBaseContext().getResources().getDisplayMetrics());

Is possible to set only default English language of application in android

I only want set only default English language of application in android.
After Supporting Different Languages, I also use values/strings.xml to store characters in that file.
If in English language mode of System Settings, I can show correct words.
If in Chinese language mode of System Settings, The English words was translated to Chinese.
I don't want it translate automatically.
People who know how to set only default English language,
Please help me.
Thanks,

I can get correct answer now via the codes in below :
public static void setDefaultLanguage(Context context, String lang) {
Locale locale = new Locale(lang);
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
context.getResources().updateConfiguration(config,
context.getResources().getDisplayMetrics());
}
In that, what is lang value? You should get correct Language System to pass this value to lang parameter.
Thanks,

Are you storing all the strings for both languages in one .xml? If so that is probably your issue…
res/values/strings.xml
Contains English text for all the strings that the application uses,
res/values-ja/strings.xml - for japanese, but I am sure you can find one for the language you are looking for! Android looks for the "values-ja" tag.

Regarding Android Application Language

My problem is that i have a Diary application in which i am adding notes by selecting a particular date from Custom Calendar View.
The problem starts when user changes his phone language from English to any other, If user has selected Japanese as his phone's new language, Month's name would be converted in Japanese language.
Now i want that if user selects any other language other than English than also Month's name should be shown in English only.
I searches a lot but could not find anything helpful.
Any positive response will be highly appreciated.
Thanks.

You should use custom calender and when you display your calendar change Locale(Language) to English programatically.
How to change Locale programatically in android.
Hope it helps you.
Edit :
You can change Language using following code :
public void changeLang(String lang)
{
if (lang.equalsIgnoreCase(""))
return;
myLocale = new Locale(lang);
saveLocale(lang);
Locale.setDefault(myLocale);
android.content.res.Configuration config = new android.content.res.Configuration();
config.locale = myLocale;
getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
updateTexts();
}
Call this method by passing your language Like :
changeLang("en");
Note : You must define your string in res/string.xml file for english language. And you should set your string from String.xml not static.
For example for your concern Your calendar Names are set like...
yourtextview.getResources().getString(R.string.january);

Android : Setting language in app

I want to change my app language in my app because android languages don't have all languages i want to use. So i got this to change:
String languageToLoad = "en";
Locale locale = new Locale(languageToLoad);
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config,
getBaseContext().getResources().getDisplayMetrics());
However, when user opens app and change it. Then strings which is showing at that moment still are the older language it changes just when new Activity is created.
Other problem that i should somehow save what user language was select and then change language when app is started.
So how to improve this? I want that when user select language all strings would be taken from selection languages strings.xml and how to save which language user was selected?

You can use a SharedPreference to store the user's language. Here's the documentation about it: http://developer.android.com/reference/android/content/SharedPreferences.html
About the need to reload the Activity, you may find some answers here: Android: locale(system Language) change effect my application layouts

You can create a public class (public class Share) with static members like public static String language = "en"; You can easily access the fields of this class with using the code as Share.language in whole of your project. If you want to change the language you can set Share.language = "fa";. To reload the activity with selected language, you should place the following code before any activitie's super.onCreate(saveInstanceState); :
Locale l = new Locale(Shares.language);
Locale.setDefault(l);
Configuration config = new Configuration();
config.locale = l;
context.getApplicationContext().getResources()
.updateConfiguration(config, null);
Please note that, language can be set, if you have a folder like values-language in your /res folder.
Good luck, Hossein :)