I am implementing run time language changing for a game. Saving data in preferences. Everything works fine except one thing:
In preferences I specify languages in ListPreference. if I change language - it is excellent changed everywhere in the app, but if I try to change language again, in ListPreference pointer is always on the English (default value) instead of current language. Once again: default value is English. I change it to French. My app language becomes French, but when I enter ListPreference now - the pointer is still on the English (like if English is current) , but has to be on French.
Here is my code:
preferences.xml
PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" >
<PreferenceCategory
<ListPreference
android:key="language"
android:title="@string/language"
android:summary="@string/select_language"
android:defaultValue="en"
android:entries="@array/languages"
android:entryValues="@array/languagesValues"
/>
</PreferenceScreen>
arrays .xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string-array name="languages">
<item name="english">English</item>
<item name="french">French</item>
</string-array>
<string-array name="languagesValues">
<item name="english">en</item>
<item name="french">fr</item>
</string-array>
</resources>
PreferenceActivity
public class Settings extends PreferenceActivity {
Locale myLocale;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.preferences);
Preference langPreference = getPreferenceScreen().findPreference(
"language");
langPreference.setOnPreferenceChangeListener(languageChangeListener);
}
Preference.OnPreferenceChangeListener languageChangeListener = new OnPreferenceChangeListener() {
@Override
public boolean onPreferenceChange(Preference preference, Object newValue) {
switch (newValue.toString()) {
case "en":
setLocale("en");
Toast.makeText(getApplicationContext(), "Locale in English!", Toast.LENGTH_LONG).show();
break;
case "fr":
setLocale("fr");
Toast.makeText(getApplicationContext(), "Locale in French!", Toast.LENGTH_LONG).show();
break;
}
return false;
}
};
//* manually changing current locale/
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, Settings.class);
finish();
startActivity(refresh);
}
}
You are returning false
instead of true
. onPreferenceChange
documentation: returns "True to update the state of the Preference with the new value."
Because you are returning false, you are not updating the state of the Preference
.
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