Android：以编程方式更改语言

Question

I have 3 buttons to change language. So I need to make method, where I could set listeners to buttons which could change language everytime they are pressed. I tried this https://stackoverflow.com/a/2900144/1088229 but this way it changes locale only once and seems that this doesn't work any more (if i click again, it doesn't even respond). So I added changeLanguageListener() in end of listener, so listener is refreshed.

So is it ok, how i solved it or there is another way?

private void changeLanguageListener() {
    final Button butEn = (Button) findViewById(R.id.button_language_en);
    final Button butLt = (Button) findViewById(R.id.button_language_lt);
    final Button butRu = (Button) findViewById(R.id.button_language_ru);
    OnClickListener listener = new OnClickListener() {

        public void onClick(View v) {
            Button but = (Button) v;
            Resources res = getResources();
            String current = res.getConfiguration().locale.getCountry();
            Log.i("Current", current);
            String localeString = new String(current);
            if (but.equals(butEn)) {
                localeString = "en";
            } else if (but.equals(butLt)) {
                localeString = "lt";
            } else if (but.equals(butRu)) {
                localeString = "ru";
            }
            Log.i("Clicked", localeString);

            if (!current.equalsIgnoreCase(localeString) && localeString.length() > 0) {
                // Change locale settings in the app.
                DisplayMetrics dm = res.getDisplayMetrics();
                android.content.res.Configuration conf = res.getConfiguration();
                conf.locale = new Locale(localeString.toLowerCase());
                res.updateConfiguration(conf, dm);  
                //refresh menu
                setGridView();
                //added this line to get refreshed listener
                changeLanguageListener();
            }               
        }
    };
    butEn.setOnClickListener(listener);
    butLt.setOnClickListener(listener);
    butRu.setOnClickListener(listener);
}

Answer 1

So, because of only two activities (two menu modes) where i let to change locale, I just restart Activity right after locale change, so everything is refreshed. Didn't find any other better solution

Answer 2

Resources res = context.getResources();
// Change locale settings in the app.

DisplayMetrics dm = res.getDisplayMetrics();

android.content.res.Configuration conf = res.getConfiguration();

conf.locale = new Locale(language_code.toLowerCase());
res.updateConfiguration(conf, dm);

If you have language specific content - you can change that base on the setting.## Heading ##

Answer 3

I would not recommend to change the language within your application. A better solution would be a button that opens the systems locale settings. You can use the following intent for this.

startActivityForResult(new Intent(android.provider.Settings.ACTION_LOCALE, 0);

For more info about the locale settings: http://developer.android.com/reference/android/provider/Settings.html#ACTION_LOCALE_SETTINGS