I read a few times the official guide for this, and many other stuff, like questions on this site but I cant make mine work 100%
As of right now if I change the language in my list preference, the activity (SettingsActivity) will not update itself (like 1 out of 20 times, somehow it will, no idea why). After I press the back button, my MainActivity did not update either. But all my other activitys always show the correct language, and if I go back to the SettingsActivity it will be okay, same with the MainActivity, if I restart the app.
Relevant Parts:
MainActivity:
public class MainActivity extends Activity {
public static final String KEY_PREF_LANGUAGE = "pref_language";
@Override
protected void onCreate(Bundle savedInstanceState) {
...
PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
}
@Override
protected void onResume() {
super.onResume();
SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(this);
String languagePref_ID = sharedPref.getString(KEY_PREF_LANGUAGE, "2");
switch (languagePref_ID) {
case "1":
Locale localeEN = new Locale("en_US");
setLocale(localeEN);
break;
case "2":
Locale localeHU = new Locale("hu_HU");
setLocale(localeHU);
break;
}
}
public void setLocale(Locale locale) {
Locale.setDefault(locale);
Resources res = getResources();
DisplayMetrics dm = res.getDisplayMetrics();
Configuration conf = res.getConfiguration();
conf.locale = locale;
res.updateConfiguration(conf, dm);
//recreate();
//finish();
//startActivity(getIntent());
//if these are not commented, main activity wont show at start at all
}
SettingsActivity
public class SettingsActivity extends PreferenceActivity implements SharedPreferences.OnSharedPreferenceChangeListener {
public static final String KEY_PREF_LANGUAGE = "pref_language";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getFragmentManager().beginTransaction()
.replace(android.R.id.content, new SettingsFragment())
.commit();
SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(this);
SharedPreferences.OnSharedPreferenceChangeListener listener =
new SharedPreferences.OnSharedPreferenceChangeListener() {
public void onSharedPreferenceChanged(SharedPreferences prefs, String key) {
if (key.equals(KEY_PREF_LANGUAGE)) {
String languagePref_ID = prefs.getString(SettingsActivity.KEY_PREF_LANGUAGE, "");
switch (languagePref_ID) {
case "1":
Locale localeEN = new Locale("en_US");
setLocale(localeEN);
break;
case "2":
Locale localeHU = new Locale("hu_HU");
setLocale(localeHU);
break;
}
}
}
};
sharedPref.registerOnSharedPreferenceChangeListener(listener);
}
public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
if (key.equals(KEY_PREF_LANGUAGE)) {
String languagePref_ID = sharedPreferences.getString(SettingsActivity.KEY_PREF_LANGUAGE, "2");
switch (languagePref_ID) {
case "1":
Locale localeEN = new Locale("en_US");
setLocale(localeEN);
break;
case "2":
Locale localeHU = new Locale("hu_HU");
setLocale(localeHU);
break;
}
}
//this doenst even get called but i need it for the implementation
}
public void setLocale(Locale locale) {
Locale.setDefault(locale);
Resources res = getResources();
DisplayMetrics dm = res.getDisplayMetrics();
Configuration conf = res.getConfiguration();
conf.locale = locale;
res.updateConfiguration(conf, dm);
recreate(); //tried like 4 ways to do this, nothing really worked
//finish();
//startActivity(getIntent());
}
}
SettingsFragment.java
public class SettingsFragment extends PreferenceFragment {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Load the preferences from an XML resource
addPreferencesFromResource(R.xml.preferences);
}
}
AndroidManifest.xml
android:configChanges="locale|orientation" //added to main and settings activity
I'm getting crazy over this, this is the best working state, but I know the activity lifecyle managment here is far from the best, when I try with those, I can't get it to work at all usually. How can I make this work so it actually updates on run time on all activities?
