How to change language of app when user selects language

Question

I want my app to support three languages Spanish Portuguese  amp  English  And give option to select language in app I have made  1  3 drawable folders drawable-es drawable-pt drawable   2  3 values folder values-es values-pt values Change String xml values according to languages   I have imageView to select language When click it menu open that consists option English Spanish Portuguese   I set Locale inside app on option selection by this code  public boolean onOptionsItemSelected MenuItem item        switch  item getItemId              case R id en               Locale locale   new Locale  en                  Locale setDefault locale                Configuration config   new Configuration                 config locale   locale               getBaseContext   getResources   updateConfiguration config  getBaseContext   getResources   getDisplayMetrics                  Toast makeText this   Locale in English     Toast LENGTH LONG  show                 break           case R id pt               Locale locale2   new Locale  pt                  Locale setDefault locale2                Configuration config2   new Configuration                 config2 locale   locale2               getBaseContext   getResources   updateConfiguration config2  getBaseContext   getResources   getDisplayMetrics                   Toast makeText this   Locale in Portugal     Toast LENGTH LONG  show                 break           case R id es               Locale locale3   new Locale  es                  Locale setDefault locale3                Configuration config3   new Configuration                 config3 locale   locale3               getBaseContext   getResources   updateConfiguration config3  getBaseContext   getResources   getDisplayMetrics                   Toast makeText this   Locale in Spain     Toast LENGTH LONG  show                 break                 return super onOptionsItemSelected item       I have declare in Manifest-  android configChanges  locale   It work but it have some issue   Problem -  1 When language selected  screen that consists image of language selection not change but other screens are change   2 After orientation change app restore language according to locale of phone

User · Accepted Answer

It s excerpt for the webpage  http   android programmerguru com android-localization-at-runtime   It s simple to change the language of your app upon user selects it from list of languages  Have a method like below which accepts the locale as String  like  en  for English   hi  for hindi   configure the locale for your App and refresh your current activity to reflect the change in language  The locale you applied will not be changed until you manually change it again   public void setLocale String lang         Locale myLocale   new Locale lang        Resources res   getResources         DisplayMetrics dm   res getDisplayMetrics         Configuration conf   res getConfiguration         conf locale   myLocale       res updateConfiguration conf  dm        Intent refresh   new Intent this  AndroidLocalize class        finish        startActivity refresh         Make sure you imported following packages   import java util Locale   import android os Bundle   import android app Activity   import android content Intent   import android content res Configuration   import android content res Resources   import android util DisplayMetrics     add in manifest to activity android configChanges  locale orientation

User · Answer

Udhay s sample code works well  Except the question of Sofiane Hassaini and  Chirag SolankI  for the re-entrance  it doesn t work  I try to call Udhay s code without restart the activity in onCreate     before super onCreate savedInstanceState    Then it is OK    Only a little problem  the menu strings still not changed to the set Locale       public void setLocale String lang      call this in onCreate         Locale myLocale   new Locale lang          Resources res   getResources           DisplayMetrics dm   res getDisplayMetrics           Configuration conf   res getConfiguration           conf locale   myLocale         res updateConfiguration conf  dm            Intent refresh   new Intent this  AndroidLocalize class            startActivity refresh            finish

User · Answer

You should either remove android configChanges  locale  from manifest  which will cause activity to reload  or override onConfigurationChanged method    Override public void onConfigurationChanged Configuration newConfig    super onConfigurationChanged newConfig          your code here  you can use newConfig locale if you need to check the language        or just re-set all the labels to desired string resource

User · Answer

Good solutions explained pretty well here  But Here is one more   Create your own CustomContextWrapper class extending ContextWrapper and use it to change Locale setting for the complete application  Here is a GIST with usage   And then call the CustomContextWrapper with saved locale identifier e g   hi  for Hindi language in activity lifecycle method attachBaseContext  Usage here    Override protected void attachBaseContext Context newBase           fetch from shared preference also save the same when applying  Default here is en   English     String language   MyPreferenceUtil getInstance   getString  saved locale    en        super attachBaseContext MyContextWrapper wrap newBase  language

User · Answer

Those who getting the version issue try this code      public static void switchLocal Context context  String lcode  Activity activity            if  lcode equalsIgnoreCase                  return          Resources resources   context getResources            Locale locale   new Locale lcode           Locale setDefault locale           android content res Configuration config   new          android content res Configuration            config locale   locale          resources updateConfiguration config  resources getDisplayMetrics               restart base activity          activity finish            activity startActivity activity getIntent

User · Answer

Locale locale   new Locale langCode       Locale setDefault locale       Configuration configuration   context getResources   getConfiguration        configuration locale   locale      preferences setLocalePref langCode       context getResources   updateConfiguration configuration  context getResources   getDisplayMetrics      Here  langCode is the required language code  You can save the language code as string in sharedPreferences  and you can call this code super onCreate savedInstanceState  in onCreate

User · Answer

all the above  Uday s code is perfect but only one thing is missing default config in build gradle  public void setLocale String lang     Locale myLocale   new Locale lang    Resources res   getResources     DisplayMetrics dm   res getDisplayMetrics     Configuration conf   res getConfiguration     conf locale   myLocale   res updateConfiguration conf  dm    Intent refresh   new Intent this  AndroidLocalize class    finish    startActivity refresh       Mine was not working just because the languages were not mentioned in the config file build gradle   defaultConfig       resConfigs  quot en quot    quot hi quot    quot kn quot     after that  all languages started running

User · Answer

Kotlin solution using context extension fun Context applyNewLocale locale  Locale   Context       val config   this resources configuration     val sysLocale   if  Build VERSION SDK INT  gt   Build VERSION CODES N            config locales get 0        else             Legacy         config locale           if  sysLocale language    locale language            Locale setDefault locale          if  Build VERSION SDK INT  gt   Build VERSION CODES N                config setLocale locale            else                 Legacy             config locale   locale                   resources updateConfiguration config  resources displayMetrics            return this    Usage override fun attachBaseContext newBase  Context         super attachBaseContext newBase  applyNewLocale Locale  quot es quot    quot MX quot

[android] How to change language of app when user selects language?

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