多语言切换

以下代码是切换语言按钮的事件函数，演示在中文和英文之间语言互换，这段代码主要是通过SharedPreference配置文件来读取当前的语言，并将切换后的值写入配置文件中:

    private static final int LANGUAGE_ZH = 1;
    private static final int LANGUAGE_EN = 2;

    private void changeLanguage() {
        SharedPreferences sp = getSharedPreferences("language", Context.MODE_PRIVATE);
        int currentLanguage = sp.getInt("lan", LANGUAGE_ZH );
        if (currentLanguage == LANGUAGE_EN) {
            currentLanguage = LANGUAGE_ZH ;
        } else {
            currentLanguage = LANGUAGE_EN;
        }

        SharedPreferences.Editor editor = sp.edit();
        editor.putInt("lan", currentLanguage);
        editor.commit();
        Refresh();
    }

注意上面代码最后的Refresh()函数，该函数用来重新刷新界面，代码如下:

    protected void Refresh() {
        finish();
        final Intent intent = getPackageManager().getLaunchIntentForPackage(getPackageName());
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        startActivity(intent);
    }

APP启动页的onCreate()函数中代码如下。其主要功能为读取名为“language”的SharedPreference的值，并通过updateConfiguration函数切换界面显示语言，代码如下:

        Locale myLocale;
        SharedPreferences sp = getSharedPreferences("language", Context.MODE_PRIVATE);
        int currentLanguage = sp.getInt("lan", LANGUAGE_ZH);
        if (currentLanguage == LANGUAGE_ZH) {
            //下面这行等同于 myLocale = Locale.CHINESE;
            myLocale = new Locale("zh", "");
        } else {
            myLocale = Locale.ENGLISH;
        }
        Resources res = getResources();
        DisplayMetrics dm = res.getDisplayMetrics();
        Configuration conf = res.getConfiguration();
        conf.locale = myLocale;
        res.updateConfiguration(conf, dm);