How to change the application language by user choice? - android

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/

Related

After I set Locale.setDefault(locale), how can I get back the phone langage?

I use this snippet to allow the user to set his favorite locale in the appplication:
Locale locale = new Locale(newLan);
Locale.setDefault(locale);
Configuration config = getBaseContext().getResources().getConfiguration();
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config,getBaseContext().getResources().getDisplayMetrics());
Problem is that I would like to write a setting that would allow the user to get back to the default langage of the phone.
How is it possible?
Because after using the snippet above and imagine user chose French, I cannot get back the phone locale (which might be english for instance)
I just tried this, my phone locale is US, the toast is shown in french but in the log I still see US, maybe if you don't set the new locale as default it works anyway?
Locale locale = new Locale("fr");
//Locale.setDefault(locale);
Configuration config = getBaseContext().getResources().getConfiguration();
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config,getBaseContext().getResources().getDisplayMetrics());
Toast.makeText(this, android.R.string.cancel, Toast.LENGTH_LONG).show();
Log.d("LOCALE", Locale.getDefault().getCountry());
I've seen using Locale.setDefault() in other questions and answers, now I'm wondering, why would you be required to set the default Locale manually? If that was necessary, wouldn't it be done in updateConfiguration() anyway? this answer is also interesting
How about:
Saving current locale to shared preferences
Force to whatever you want
Use the shared preferences value to move back to original locale
Firstly this bit of code config.locale = locale; is deprecated, you should use config.setLocale(locale);
Have you tried getting the current device locale with Locale.getDefault().getDisplayLanguage();, and set it once the user chooses the default locale to be the selected language of your application with your code snippet?
In https://stackoverflow.com/a/34675427/519334 I solved the issue "go back to device-languge" by remembering the device-language in a static variable before any app-changes to locale have been taken place:
public class Global {
public static final Locale systemLocale = Locale.getDefault();
}

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
}

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.

Changing the language manually to Simplifies Chinese

I use this code to change the language of my app manually:
Locale locale = new Locale(OneLanguageCode);
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
I set in OneLanguageCode the international code. Everything works find for every code I have tried like "en", "es", "fr" and so on... But I am driving myself crazy with simplified Chinese.
In that case I have the folder called values-zh-rCN where the strings are. It works well if I set the device language to Simplified Chinese. But there is no way to set it manually with the code above.
I have tried using "zh-CN" as the OneLanguageCode value, but no success either. It is displayed in English.
As I said all this work with other languages. I can have people with Dutch as their device default language but have French in my app. Why am I not able to have Dutch as the device default language but have traditional Chinese in my app?
Thanks for your time.
Locale locale = new Locale("en_CA");
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
context.getApplicationContext().getResources().updateConfiguration(config, null);
Thanks for the help of user2968888 this is how I solved:
Locale locale;
if(OneLanguageCode.equals("schinese")) //any tag here to know it is Simplified Chinese
locale = Locale.SIMPLIFIED_CHINESE;
else
locale = new Locale(OneLanguageCode);
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
getApplicationContext().getResources().updateConfiguration(config, null);

Can't change language in Android device

I am trying to change my device's language in my app. I have this code:
Locale locale = new Locale("en_US");
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
getApplicationContext().getResources().updateConfiguration(config, null);
Log.i("some","Well, I tried!");
But this code does not change state of my device, and in LogCat I can see "Well, I tried" message. What are the possible reasons of such strange behaviour?
Edit this line
getApplicationContext().getResources().updateConfiguration(config, null);
like this:
context.getApplicationContext().getResources().updateConfiguration(config, null);
If you came here for language problems for builds after Summer 2021, it may have nothing to do with your code. We had the same issue and the problem was the new bundle (.aab) requirement (required since Summer 2021).
With app bundles, devices download only the code and resources they require to run your app. So, for language resources, a user’s device downloads only your app’s language resources that match the one or more languages currently selected in the device’s settings.
Read further
Basically, the language file is not downloaded if the device does not support that language. There are 2 ways to solve it:
Option 1 (Easiest): Just disable the bundle optimization
Add this in your build.gradle file:
android {
bundle {
language {
enableSplit = false
}
}
// ...
// Other configuration
}
Option 2: Download the language file on demand
Use the method described here.
How to debug
Before applying these methods,
Delete the app
Add the new language in the device settings
Download the app again
If the app supports the new language then the problem is definitely the bundle optimization and the above mentioned solutions will work.
To change the applications locale manually.
You will need to set the locale using the code below.
Locale locale = new Locale("AR"); // AR here is for arabic
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config,
getBaseContext().getResources().getDisplayMetrics());
Make sure it is set in the activity "onCreate" method before calling the "setContentView" method.
Also see that the resource files are specified for the language required.

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