I'm having a headache with the locale thing in my app. So basically my app supports two languages, English and Vietnamese, and user can choose to change the language to be displayed. So I have a SettingActivity like this:
public class SettingsActivity extends SherlockPreferenceActivity implements OnPreferenceChangeListener{
private ListPreference langPref;
private SharedPreferences languagepref;
private String language;
private Locale locale;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
languagepref = PreferenceManager.getDefaultSharedPreferences(this);
Configuration config = getBaseContext().getResources().getConfiguration();
language = languagepref.getString("languageToLoad","en");
locale = new Locale(language);
Locale.setDefault(locale);
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
addPreferencesFromResource(R.xml.preferences_login);
langPref = (ListPreference) findPreference("lang_pref");
if (language.equalsIgnoreCase("vi")){
langPref.setValueIndex(1);
}
else{
langPref.setValueIndex(0);
}
langPref.setOnPreferenceChangeListener(this);
}
#Override
public boolean onPreferenceChange(Preference preference, Object newValue) {
String key = preference.getKey();
if (key.equals("lang_pref")){
String languageToLoad = (String) newValue;
Locale locale = new Locale(languageToLoad);
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config,
getBaseContext().getResources().getDisplayMetrics());
SharedPreferences.Editor editor = languagepref.edit();
editor.putString("languageToLoad",languageToLoad );
editor.commit();
recreate();
}
return false;
}
}
In every other activity, I add this in their onCreate method:
SharedPreferences languagepref = PreferenceManager.getDefaultSharedPreferences(this);
Configuration config = getBaseContext().getResources().getConfiguration();
String language = languagepref.getString("languageToLoad","en");
Locale locale = new Locale(language);
Locale.setDefault(locale);
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
And now my app is acting weird: in the SettingActivity, the language is displayed properly whenever I rotate my device, even without the need of adding android:configChanges="locale" in the activity's manifest. However, in every other activity, the language is changed back to English when I rotate the device. I've try adding android:configChanges="locale" in their manifest but it doesn't work. Also, I've tried every solution found on Stackoverflow but none of them works for me, so I'm basically clueless now. Could anyone of you help me point out the mistake I made here? Please do and thanks in advance.
Try adding
android:configChanges="orientation|keyboard|keyboardHidden"
in the manifest for each activity.
Then you should override onConfigurationChanged in your activities, and in this method reload layout (depending orientation). If you still have problems with locale, reload the appropriate locale in onConfigurationChanged.
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.
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());
}
}
}
I am trying to override the locale to use Czech locale no matter what is set in the phone. However, although when I try to get the current locale, it returns czech, but for plurals, it acts like it still takes the real phone locale.
Here is my code:
<application
android:name=".xxx"
android:allowBackup="true"
android:icon="#drawable/logo"
android:label="#string/app_name"
android:theme="#style/Theme.mystyle"
android:configChanges="locale"
>
In application:
String lang = settings.getString("cs", "");
locale = new Locale(lang);
Locale.setDefault(locale);
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
I posted on GitHub simple LocaleAssistant class I just tested with plurals for Slovak and also Czech language, and it worked on the device with default locale set to EN. Just call those two methods from within your custom Application on the member instance of LocaleAssistant.
In the end I found the correct solution. Gray Wolf's solution did not work for me for some reason. Maybe it is all about the API level you develop your app for.
This is the working code. Besides that, it is also necessary to add configChanges:locale to AndroidManifest. This should work on Android 4.0.1 and above.
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 = "cs";
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());
}
}
}
We have an Android app that functions as a client for a remote PC program. We'd like to add a feature so the PC can instruct the Android app to change its locale at runtime, i.e., start the app; put it in communication with the PC; sometime later the PC tells the app to switch to, say, Spanish or Chinese.
We already have all the layout and string resources set up for their respective locales. Our app is the only app the user sees so it doesn't matter if the rest of the device stays in English.
There is another thread on this at Change language programmatically in Android but it doesn't seem to reach a conclusion.
I can put . . .
Locale locale = new Locale(sTheNewLocale);
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config,
getBaseContext().getResources().getDisplayMetrics());
. . . in onCreate() before the setContentView() but that doesn't really help if I want to change the locale after my screen is up and running. Is there a way to REload the content view after the Activity is already running? So is there any practical way to change locales on-the-fly reliably or do I have to tell my boss it can't be done except for setting the whole device to the new locale before starting the app?
Since API 11 you can use recreate so can make this method in your activity:
private void restartInLocale(Locale locale)
{
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
Resources resources = getResources();
resources.updateConfiguration(config, resources.getDisplayMetrics());
recreate();
}
You can start a new instance of your activity and exit the old one. Here is a full (untested) example how you can store any desired language and restart your app. You just need to call restartInLanguage with your prefered language.
public class YourMainActivity extends Activity {
private static final String APP_SHARED_PREFS = "com.example.test";
private SharedPreferences settings;
private Editor editor;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
settings=getSharedPreferences(APP_SHARED_PREFS, Activity.MODE_PRIVATE);
editor=settings.edit();
Locale locale = new Locale(settings.getString("lang", "default-lang"));
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
getResources().updateConfiguration(config, getResources().getDisplayMetrics());
// your stuff...
}
public void restartInLanguage(String lang) {
editor.putString("lang", lang);
editor.commit();
Intent intent = getIntent();
finish();
startActivity(intent);
}
// ...
}
I have combined #weston and #rekire (both +1) and extendet it to handle this use-case:
ActivityA => ActivityB => SettingsActivity-changeLocale
After changeLocale in SettingsActivity the parent activities ActivityA and ActivityB should also be recreated to reflect the new locale.
My solution: ActivityA and ActivityB inherit from LocalizedActivity which checks in onResume if the locale has changed and trigger a recreate() if necessary
So every activity that inherits from LocalizedActivity automatically handles app specific locale change.
/**
* An activity that can change the locale (language) of its content.
*
* Inspired by http://stackoverflow.com/questions/13181847/change-the-locale-at-runtime
*
* Created by k3b on 07.01.2016.
*/
public class LocalizedActivity extends Activity {
/** if myLocale != Locale.Default : activity must be recreated in on resume */
private Locale myLocale = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
fixLocale(this);
super.onCreate(savedInstanceState);
}
#Override
protected void onResume() {
super.onResume();
// Locale has changed by other Activity ?
if ((myLocale != null) && (myLocale.getLanguage() != Locale.getDefault().getLanguage())) {
myLocale = null;
recreate();
}
}
/**
* Set Activity-s locale to SharedPreferences-setting.
* Must be called before onCreate
* #param context
*/
public static void fixLocale(Context context)
{
final SharedPreferences prefs = PreferenceManager
.getDefaultSharedPreferences(context);
String language = prefs.getString(Global.PREF_KEY_USER_LOCALE, "");
Locale locale = Global.systemLocale; // in case that setting=="use android-locale"
if ((language != null) && (!language.isEmpty())) {
locale = new Locale(language); // overwrite "use android-locale"
}
if (locale != null) {
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
Resources resources = context.getResources();
resources.updateConfiguration(config, resources.getDisplayMetrics());
// recreate();
if (context instanceof LocalizedActivity) {
((LocalizedActivity) context).myLocale = locale;
}
}
}
}
Here is the source of LocalizedActivity.java and SettingsActivity.java that are used in my A Photo Manager project
The solution is to use setContentView and controlLanguage (you can also call this method from a Global class) methods in EVERY activity in onResume method after setting your locale.
Example:
#Override
public void onClick(View v) {
SharedPreferences.Editor editor;
editor = sharedPref.edit();
Configuration config = new Configuration(getBaseContext().getResources().getConfiguration());
String language = "";
switch (v.getId()){
case R.id.turkceButton:
editor.putString("language", "tr");
language="tr";
break;
case R.id.englishButton:
editor.putString("language", "en");
language="en";
break;
}
Locale locale = new Locale(language);
Locale.setDefault(locale);
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
editor.commit();
#Override
protected void onResume() {
super.onResume();
controlLanguage(getApplicationContext(), getResources());
setContentView(R.layout.main);
}
public void controlLanguage(Context context, Resources res){
SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(context);
String language = sharedPref.getString("language","en");
Locale locale = new Locale(language);
Locale.setDefault(locale);
res.getConfiguration().locale = locale;
res.updateConfiguration(res.getConfiguration(), res.getDisplayMetrics());
}
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.