android关于切换语言

语言的api很简单， 但是 因为android有2个上下文 ， 全局和activity上下文，如果要生效的话，我发现要同时调用两者，否则要么fragment里面不生效要么act里面没生效。

        val which = SPUtils.getValue(SuperContext.getInstance(), "language", 0)
        var language = ""
        if (which == 1) {
            language = "zh"
        } else if (which == 2) {
            language = "en"
        }
        if (!TextUtils.isEmpty(language)) {
            LanguageSelectAdapter.applyLocale(SuperContext.getInstance(), language)
            LanguageSelectAdapter.applyLocale(this, language)
        }




    public static Context applyLocale(Context context, String language) {
        Locale locale;
        if (language.equals("en")) {
            locale = Locale.ENGLISH;
        } else if (language.equals("zh")) {
            locale = Locale.SIMPLIFIED_CHINESE;

        } else if (language.equals("")) {

            locale = Locale.getDefault();

        } else {
            if (language == null || language.isEmpty()) {
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
                    LocaleList locales = Resources.getSystem().getConfiguration().getLocales();
                    if (locales.isEmpty()) {
                        locale = new Locale("");
                    } else {
                        locale = locales.get(0); // follow system
                    }
                } else {
                    locale = Resources.getSystem().getConfiguration().locale;
                }
            } else {
                locale = new Locale(language);
            }
        }

        Locale.setDefault(locale);
        Resources resources = context.getResources();
        Configuration config = resources.getConfiguration();
        config.setLocale(locale);
        resources.updateConfiguration(config, resources.getDisplayMetrics());
        return context;
    }

上面代码在splash入口写就行，
而 act 设置的地方这样写 发现就能全部生效了

   LanguageSelectAdapter.applyLocale(SuperContext.getInstance(), language);
                            LanguageSelectAdapter.applyLocale(getActivity(), language);
                            getActivity().recreate();

再次优化

    String languageStr = SPUtils.getValue(SuperContext.getInstance(), "languageStr", "");

                LanguageSelectAdapter.Bean[] items = ModuleManager.getInstance().getSupportLangeuages();
                int currentChooseLanguage = 0;
                for (int i = 0; i < items.length; i++) {
                    LanguageSelectAdapter.Bean item = items[i];
                    if (item.value.equals(languageStr)) {
                        currentChooseLanguage = i;
                        break;
                    }
                }
                LanguageSelectAdapter arrayAdapter = new LanguageSelectAdapter(
                        getActivity(), R.layout.view_language_item, items);
                int finalCurrentLanguage = currentChooseLanguage;
                builder.setSingleChoiceItems(arrayAdapter, currentChooseLanguage, new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        LanguageSelectAdapter.Bean item = items[which];
                        SPUtils.setValue(SuperContext.getInstance(), "languageStr", item.value);
                        LanguageSelectAdapter.applyLocale(SuperContext.getInstance(), item.value);
                        LanguageSelectAdapter.applyLocale(getActivity(), item.value);
                        getActivity().recreate();

                    }

                });
                builder.setTitle(AppContext.getStr(R.string.language_setting));
                builder.show();

    public com.sotrun.app.adapter.LanguageSelectAdapter.Bean[] getSupportLangeuages() {
        LanguageSelectAdapter.Bean[] items = new LanguageSelectAdapter.Bean[]{
                new LanguageSelectAdapter.Bean(SuperContext.getStr(R.string.default_), ""),
                new LanguageSelectAdapter.Bean(SuperContext.getStr(R.string.chinese), "zh"),
                new LanguageSelectAdapter.Bean("English", "en"),

        };
        return items;
    }

但是这样还有一个问题，我发现横屏等触发act重布局的情况下又会回复，光在splash设置一次代码还不够。故依然无法偷懒只能baseact全部执行。

另外 对于act 在xml定义的title,那么这种界面就需要在act具体界面重新设置标题了。 mainifest.xml中定义的不会被刷新。