I want to change the application's Locale (language) to change programmatically when user wants to switch between Hindi and English using change language button.
I have a code to change language in place but it works only when I call in in the onCreate() of an activity before setContentView() method.
Any help is much appreciated.
See here my answer
Android Font in more then one langauge on single screen
for example if you want your application to support both English
and Arabic strings (in addition to the default strings),
you can simply create two additional
resource directories called /res/values-en (for the English strings.xml) and
/res/values-ar (for the Arabic strings.xml).
Within the strings.xml files, the
resource names are the same.
For example, the /res/values-en/strings.xml file could
look like this:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="hello">Hello in English!</string>
</resources>
Whereas, the /res/values-ar/strings.xml file would look like this:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="hello">مرحبا في اللغة الإنجليزية</string>
</resources>
also , the /res/values-ur_IN/strings.xml file would look like this for urdu:
ur_IN for india ur_PK for pakisthan
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="hello">انگریزی میں خوش!!</string>
</resources>
A default layout file in the /res/layout directory that displays the string refers to the
string by the variable name #string/hello, without regard to which language or directory
the string resource is in.
The Android operating system determines which version of
the string (French, English, or default) to load at runtime.A layout with a TextView control
to display the string might look like this:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="#string/hello" >
</LinearLayout>
The string is accessed programmatically in the normal way:
String str = getString(R.string.hello);
For change the language you need to like that change lang..
btn_english.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
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, getResources().getString(R.string.lbl_langSelectEnglis), Toast.LENGTH_SHORT).show();
}
});
btn_arbice.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Locale locale = new Locale("ar");
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
Toast.makeText(this, getResources().getString(R.string.lbl_langSelecURdu), Toast.LENGTH_SHORT).show();
}
});
btn_urdu.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Locale locale = new Locale("ur_IN");
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
Toast.makeText(HomeActivity.this, getResources().getString(R.string.lbl_langSelectEnglis), Toast.LENGTH_SHORT).show();
}
});
Try this function when click button.
public void changeLocale()
{
Resources res = getResources();
// Change locale settings in the app.
DisplayMetrics dm = res.getDisplayMetrics();
android.content.res.Configuration conf = res.getConfiguration();
conf.locale = new Locale("hi_IN");
res.updateConfiguration(conf, dm);
setContentView(R.layout.xxx);
}
Use SharedPrefrences to save the user prefrences and call locale in onStart() not on onCreate(). This worked fine for me
Define DEFAULT value, so that your app wont cash
public static final String Default="en"; //so if value isn't found then english language will be used.
protected void onStart() {
SharedPreferences sharedPreferences = this.getSharedPreferences("selectedLanguage", Context.MODE_PRIVATE);
String pine = sharedPreferences.getString("language", DEFAULT);
String languageToLoad = pine;
Locale locale = new Locale(languageToLoad);//Set Selected Locale
Locale.setDefault(locale);//set new locale as default
Configuration config = new Configuration();//get Configuration
config.locale = locale;//set config locale as selected locale
this.getResources().updateConfiguration(config, this.getResources().getDisplayMetrics());
invalidateOptionsMenu();
setTitle(R.string.app_name);
super.onStart();
}
Where I set sharedPrefrences value to hindi or english as per user choice. I used switch in this case. below you can see code.
aSwitch.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
if (aSwitch.isChecked()) {
SharedPreferences hisharedPreferences = getSharedPreferences("selectedLanguage", Context.MODE_PRIVATE);
SharedPreferences.Editor hieditor = npsharedPreferences.edit();
npeditor.putString("language","hi");
npeditor.commit();
aSwitch.setChecked(true);
Toast.makeText(Settings.this, "Hindi Language Selected", Toast.LENGTH_LONG).show();
} else {
SharedPreferences ensharedPreferences = getSharedPreferences("selectedLanguage", Context.MODE_PRIVATE);
SharedPreferences.Editor eneditor = ensharedPreferences.edit();
eneditor.putString("language","en");
eneditor.commit();
Toast.makeText(Settings.this, "English Language Selected", Toast.LENGTH_LONG).show();
aSwitch.setChecked(false);
}
}
});
Hope this helped!! Feel free to ask me if you got stuck in any step!!
You can refresh activity as below sample to change user interface after updating locale language of app on click of button:
OnButtonClicked(){
//it will check for android version.
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
return updateResources(context, language);
}
return updateResourcesLegacy(context, language);
}
//after setting language it will update ui
refreshActivity();
}
public void refreshActivity() throws Exception {
try {
// refresh activity for language changes
Intent intent = getIntent();
YOUR_ACTIVITY_NAME.this.finish();
System.out.println("activity finished");
startActivity(intent);
System.out.println("starting activity");
} catch (Exception e) {
Log.d("RegistrationForm", "application crashed...");
e.printStackTrace();
}
}
#TargetApi(Build.VERSION_CODES.N)
private static Context updateResources(Context context, String language) {
Locale locale = new Locale(language);
Locale.setDefault(locale);
Configuration configuration = context.getResources().getConfiguration();
configuration.setLocale(locale);
configuration.setLayoutDirection(locale);
context.getResources().updateConfiguration(configuration,
context.getResources().getDisplayMetrics());
return context.createConfigurationContext(configuration);
}
#SuppressWarnings("deprecation")
private static Context updateResourcesLegacy(Context context, String language) {
Locale locale = new Locale(language);
Locale.setDefault(locale);
Resources resources = context.getResources();
Configuration configuration = resources.getConfiguration();
configuration.locale = locale;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
configuration.setLayoutDirection(locale);
}
resources.updateConfiguration(configuration, resources.getDisplayMetrics());
return context;
}
Complete Steps:
On button click check Android Version if Android version is below N then it will execute legacy code for locale language change that is updateResourcesLegacy. Else if Android Version is N or above N then it will execute updateResources() method.
After setting language refresh activity by calling refreshActivity() method, this method will update the user interface.
Related
Following is the Application code of my Android app:
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_language), "");
if (! "".equals(lang) && ! config.locale.getLanguage().equals(lang))
{
locale = new Locale(lang);
Log.i("Locale" , lang);
Locale.setDefault(locale);
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
}
}
}
I have got to change the value of settings.getString(getString(R.string.pref_language), ""); from the Settings Activity of my app.
The problem is none of the strings (which have a translation) and are accessed using getString() method, are showing the translated text.
EDIT1 : I am using Android 8.0
In android 8, the behavior of the Locales changed, now every Activity context will take its locale, i.e if you in Activity1 and changed the locale for Activity1, then Activity2 will remain on the default locale.
The solution is to change the locale for every Activity and your issue will be fixed.
When you are using getString(R.string.pref_language) the call will return the string from the language matching Locale.getDefault() as long as a translation is provided.
If a translation is not provided it will return the default language, that is the language your using in the values/strings.xml file.
All translated values are in values-xx folders, where xx is the 2 letter ISO code for the language.
This question already has answers here:
Change app language programmatically in Android
(34 answers)
Closed 2 years ago.
My aim is to change an application language from English to Chinese during runtime, is there any suggestions?
language_spinner = (Spinner)findViewById(R.id.settings_language_spinner);
language_spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {
if (pos == 1){
Toast.makeText(parent.getContext(),"You have selected English",Toast.LENGTH_SHORT).show();
setLocale("en");
}else if (pos == 2){
Toast.makeText(parent.getContext(),"You have selected Chinese",Toast.LENGTH_SHORT).show();
setLocale("zh");
}
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
}
});
}
public void setLocale(String lang) {
myLocale = new Locale(lang);
Resources res = getResources();
DisplayMetrics dm = res.getDisplayMetrics();
Configuration conf = res.getConfiguration();
if (!conf.locale.getLanguage().equals(lang)) {
conf.locale = myLocale;
res.updateConfiguration(conf, dm);
Intent refresh = new Intent(this, SettingsActivity.class);
startActivity(refresh);
finish();
}
}
This code is working properly with English but not working with Chinese
please help me in finding the solution ..
I can give you idea how you can implement this:
step 1: make string file for all texts in values directory as string-ch, ch is the code for Chinese language. and in code get every string with the getResources.getString(R.string.text_name); so that it can take string value at run time either English or Chinese.
step 2: now create method :
void changeLanguage(String language) {
Locale locale = new Locale(language);
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config,
getBaseContext().getResources().getDisplayMetrics());
}
step 3: call this method where you want to change language suppose if you want to get changed language of you application according to device language then you can call as:
changeLanguage(Locale.getDefault().getLanguage());
Create below function in Util like class
public static void setLocale(Activity activity, String languageCode) {
Locale locale = new Locale(languageCode);
Locale.setDefault(locale);
Resources resources = activity.getResources();
Configuration config = resources.getConfiguration();
config.setLocale(locale);
resources.updateConfiguration(config, resources.getDisplayMetrics());
}
Call this function from activity at the start. The original post with this code snippet can be found at Change app language programmatically in Android page.
protected void onResume() {
super.onResume();
SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(this);
Configuration config = getBaseContext().getResources().getConfiguration();
String lang = settings.getString("lang_list", "");
// Log.d("Lang",lang);
if (!"".equals(lang) && !config.locale.getLanguage().equals(lang)) {
recreate();
Locale locale = new Locale(lang);
Locale.setDefault(locale);
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
}
if (AppController.getInstance().isPreferenceChanged()) {
setupViewPager(viewPager);
adapter.notifyDataSetChanged();
}
}
I want to change the app language without recreate the app. I mean I want to do it when user select any language from the setting then it Should change the Setting Activity language without using recreate();, because when I use recreate(); it blinks the App once.
So I am not using recreate();. Instead I wrote below code in Setting Activity in AndroidManifest.xml
<activity
android:name=".activity.SettingsActivity"
android:label="#string/title_activity_settings"
android:configChanges="orientation|keyboardHidden|screenSize|locale|layoutDirection"/>
As in below screenshot you can see that I have selected "Hindi" for the language but it is not updating the Activity to Hindi. I mean "Select Country", "Select Your Language" and "Select Categories" should be display in Hindi instead of English. I have wrote String in both languages.
Can Anybody know How to change it when Change the language ?
OR
Why onConfigChanges is not working for locale as it is working for Orientation.
Thank you !
In your MainActivity call sharedPrefrences on onStart callback insted of calling in onCreate
Example:-
protected void onStart() {
SharedPreferences sharedPreferences = this.getSharedPreferences("selectedLanguage", Context.MODE_PRIVATE);
String pine = sharedPreferences.getString("language", DEFAULT);
String languageToLoad = pine;
Locale locale = new Locale(languageToLoad);//Set Selected Locale
Locale.setDefault(locale);//set new locale as default
Configuration config = new Configuration();//get Configuration
config.locale = locale;//set config locale as selected locale
this.getResources().updateConfiguration(config, this.getResources().getDisplayMetrics());
invalidateOptionsMenu(); //This changes language in OptionsMenu too
setTitle(R.string.app_name); //calling app name according to language selected by user
super.onStart();
}
You can use a singleton class that will handle the language change without restarting the activity,
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) && ! config.locale.getLanguage().equals(lang))
{
locale = new Locale(lang);
Locale.setDefault(locale);
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
}
}
}
This question already has answers here:
Change app language programmatically in Android
(34 answers)
Closed 9 years ago.
In my app I have a special menu where I can change application language.I get labels from project API(by parsing JSON) and project values xml.Can I change android application language without restart of application and сhangibg system language.
Insert this method and call it for changing the language.
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);
}
On toggle change or any selection call value like this:
setLocale("en-us",savedInstanceStat); // for english
setLocale("ar",savedInstanceStat); // for arabic
you can use toggle button to change language and set your selected language programamtically in your app without close app.
1.you will check which language selected?
String prefsToogleStr = getSharePrefrenceLocale();
Log.d("tag", "CtrlDashBoard prefsToogleStr" + prefsToogleStr);
if (prefsToogleStr.equalsIgnoreCase("en")) {
toggleLocaleButton.setChecked(true);
CommonMethod.setLocale("en", viewDashBoard);
} else {
CommonMethod.setLocale("ur", viewDashBoard);
toggleLocaleButton.setChecked(false);
}
////////////////////////////////////////
public String getSharePrefrenceLocale() {
SharedPreferences prefs = viewDashBoard.getSharedPreferences(
viewDashBoard.getPackageName(), ViewDashBoard.MODE_PRIVATE);
return prefs.getString("locale", "en");
}
2.change language in toggle button check change listener:
// Locale Toogle
toggleLocaleButton
.setOnCheckedChangeListener(new OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
if (buttonView.isChecked()) {
setSharePrefrenceLocale("en");
CommonMethod.setLocale("en", viewDashBoard);
} else {
setSharePrefrenceLocale("ur");
CommonMethod.setLocale("ur", viewDashBoard);
}
dialog.dismiss();
}
});
}
/////////////////////////////////////
public void setSharePrefrenceLocale(String locale) {
SharedPreferences prefs = viewDashBoard.getSharedPreferences(
viewDashBoard.getPackageName(), ViewDashBoard.MODE_PRIVATE);
Editor editor = prefs.edit();
editor.putString("locale", locale);
editor.commit();
}
//////////////////////////////////////
Main Method:call
public static void setLocale(String localeName, Context context) {
Locale locale = new Locale(localeName);
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
context.getResources().updateConfiguration(config,
context.getResources().getDisplayMetrics());
}
i hope you understand .this is useful to you.
I want to let the user change the language of my application using spinner (or any way).
I tried many ways but they change the language of this activity not all activities, and I want to save it so when the user restart the app he will find the last choosed language.
you can use this code in spinner or any way you want
String languageToLoad = "en"; // your language
Locale locale = new Locale(languageToLoad);
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config,
getBaseContext().getResources().getDisplayMetrics());
then you should save the language like this
SharedPreferences languagepref = getSharedPreferences("language",MODE_PRIVATE);
SharedPreferences.Editor editor = languagepref.edit();
editor.putString("languageToLoad",languageToLoad );
editor.commit();
and use the same code in every activity in onCreate() to load the languageToLoad from the SharedPreferences
This is an old question, but I'll answer it anyway :-)
You can extend Application class to apply Abol3z's solution on every Activity. Create class:
public class MyApplication extends Application {
#Override
public void onCreate() {
super.onCreate();
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
String lang = preferences.getString("lang", "en");
Locale locale = new Locale(lang);
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config,
getBaseContext().getResources().getDisplayMetrics());
}
}
And set MyApplication as application class in manifest:
<application
android:name=".MyApplication"
...
/>
You can set the lang value (in your spinner):
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getContext());
preferences.edit().putString("lang", "en").commit();
Use SharedPreferences to keep track of the language the user chose, and then set the activities to use that language in the onCreate (), and maybe onResume() method. This way it will persist across app restarts etc.
btnChange.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(mContext);
//preferences.edit().putString("lang", "bn").commit();
String lang = preferences.getString("lang", "en");
//Log.e("lang", "lang in Main Activity:"+lang);
if (lang.equalsIgnoreCase("en")){
setLocale("bn");
preferences.edit().putString("lang", "bn").commit();
btnChange.setText("Eng");
}else if(lang.equalsIgnoreCase("bn")){
setLocale("en");
preferences.edit().putString("lang", "en").commit();
btnChange.setText("বাংলা");
}
}
});
public void setLocale(String lang) {
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, MainActivity.class);
startActivity(refresh);
finish();
}
we use two language for test purpose. keep all string in different folder named values and values-bn.