AppLocale.java

package cn.mutils.app;

import android.content.Context;
import android.content.Intent;
import android.content.res.Configuration;
import android.content.res.Resources;

import java.util.Locale;

import cn.mutils.app.util.AppUtil;
import cn.mutils.core.text.StringUtil;

/**
 * Language configuration for application
 */
public class AppLocale {

    protected static final String LOCALE_FILENAME = "Locale";

    public static void syncLocale(Context context) {
        Resources res = context.getResources();
        Configuration config = res.getConfiguration();
        Locale locale = getLocale(context);
        if (!config.locale.equals(locale)) {
            config.locale = locale;
            res.updateConfiguration(config, null);
        }
    }

    public static Locale getLocale(Context context) {
        String str = AppUtil.getPrefString(context, LOCALE_FILENAME, AppUtil.KEY, null);
        if (str == null) {
            return Resources.getSystem().getConfiguration().locale;
        }
        return StringUtil.getLocale(str);
    }

    /**
     * Follow system if locale is null
     */
    public static void setLocale(Context context, Locale locale) {
        Locale localeAssit = locale != null ? locale : Resources.getSystem().getConfiguration().locale;
        Resources res = context.getResources();
        Configuration config = res.getConfiguration();
        if (!config.locale.equals(localeAssit)) {
            AppUtil.setPrefString(context, LOCALE_FILENAME, AppUtil.KEY, StringUtil.toString(locale));
            config.locale = localeAssit;
            res.updateConfiguration(config, null);
            try {
                Intent intent = context.getPackageManager().getLaunchIntentForPackage(context.getPackageName());
                intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP);
                context.startActivity(intent);
            } catch (Exception e) {
                // ActivityNotFoundException
            }
        }
    }
}