Develop Reference

Is every android phone has en_US locale?

I wonder is every android phone has the en_US locale preinstalled? I have to pre-set the Locale in order to prevent comma separator issue.
Currently, I'm using the method below to force change, but I worried exceptions might happen on some devices.
Locale locale = new Locale("en_US");
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config,
getBaseContext().getResources().getDisplayMetrics());

I wonder is every android phone has en_US locale preinstalled?
99.99% will have it.

They most likely have it.
In case you would like to check regardless, you could do something like this:
Locale locale = new Locale("en_US");
List availableLocales = Arrays.asList(Locale.getAvailableLocales());
if(!availableLocales.contains(locale)) {
// en_US locale not available, do your stuff here accordingly
}

Android Google Map Localization

I would like to show google map in French, Italian in Android app.
How I can set language of map ?
I checked google map API documentation but didn't find anything to set map language.
I tried below code but doesn't work for me.
String languageToLoad = "zh_CN";
Locale locale = new Locale(languageToLoad);
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config,
getBaseContext().getResources().getDisplayMetrics());
setContentView(R.layout.activity_maps);

Android Spell Checker not switching to different language

I'm having issues with default android spell checker: it doesn't want to switch to a different language. Instead it uses default system language for spell check.
Spell Checker works with default language, but when I change Locale to a different language it does not give me corrected words, but when I change language of the system Spell Checking works fine.
here is my code:
TextServicesManager tsm = (TextServicesManager) context.getSystemService(
Context.TEXT_SERVICES_MANAGER_SERVICE);
Locale locale = new Locale("fr"); //whatever language
Locale.setDefault(locale);
Configuration config = new Configuration();
config.setLocale(locale);
config.locale = locale;
Resources res = ctx.getResources();
res.updateConfiguration(config, res.getDisplayMetrics());
spellChecherSession = tsm.newSpellCheckerSession(null, locale, this, true);
I read documentation but I can't understand what am I doing wrong.
I've tried modifying locale and config, from multiple answers here, but it didn't work for me.
Please help to solve this problem.
Thanks.

How to change the application language by user choice?

In my project there is a option for the user to select language. The whole application should change by selecting the language. Language is fetched from the server side.
I referred various sites and links, but couldn't find a better solution. Localization is not possible, because it's a huge app and also language is not fixed , it is fetched from the server side and it can be varied.
Is any other solution is available? Please help...

You can use something like this:
Locale locale = new Locale(languageCode);
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config, null);
This will set the locale of the app to the desired one, not changing the global locale set on the device. All of the native localisation mechanisms will work with the context locale.

Although its not recommended to use separate language for your app other than the Android system's . But you can still change it .
Below is the code :
private void setLocale (String localeCode , Bundle b ){
Log.d(TAG+"set location function: "+localeCode);
locale = new Locale(localeCode);
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
getApplicationContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
UserDetail.this.getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
onCreate(null);
}
Use this method call on some user trigger:
setLocale("en-us",savedInstanceStat); // for english
setLocale("ar",savedInstanceStat); // for arabic
To learn more about android locals:
http://www.icanlocalize.com/site/tutorials/android-application-localization-tutorial/

Change language programatically in Android with country

I try to change my locale in an android application.
If I use only language all is ok, but today I added portuguese-br translation to my app.
Code:
Locale locale;
if(language.contains("-")) // In this case, the locale specify also the country
{
String[] country_locale = language.split("-");
locale = new Locale(country_locale[0], country_locale[1]);
}
else
locale = new Locale(language);
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
getApplicationContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
All is ok untill last line.
I know because in a previous piece of my program i could get some string with the correct pt-br locale with this code:
Resources resources = new Resources(ctx.getAssets(), ctx.getResources().getDisplayMetrics(), new_config);
updateConfiguration set my locale to English if Locale was defined with a country code.
String.xml is in values-pt-rBR
While debugging Locale value is set to pt-BR.
EDIT: After further tests, this works on my Android phone, but doesn't work on my tablet (both Sambung with android 4.4.2).
What could be the reason?
EDIT 2: Also over the emulator work if I use a phone, not work if I use a tablet.

On your current Activity, try call the follow after your code:
finish();
startActivity(getIntent());
This will recreate your Activity and, then, reload the string resources.