Android 无需重启即可在应用内切换语言

Question

从 fragment (设置)中按 TextView调用DialogFragment , 在其中更改设置(语言)应用程序，我如何关闭 DialogFragment ，应用设置而不重新启动整个应用程序？

最好在 SingleChoice 上立即更改语言选择对话框。重新启动一切正常。这是代码DialogFragment :

public class LanguageDialogFragment extends DialogFragment {

    final String[] itemsLang = {"English", "Russian", "Ukraine"};
    final String[] items = {"en", "ru", "uk"};
    String lang;
    MainActivity activity = new MainActivity();

    @NonNull
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {

        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        builder.setTitle("Выберите свой родной язык")
                .setSingleChoiceItems(itemsLang, -1, new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int item) {
                        lang = items[item];

                    }
                })

                .setPositiveButton("Ok", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int id) {
                        App.prefs.saveLanguage(lang);
                        App.changeLang(lang);

                        reload();

                    }
                })
                .setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int id) {

                    }
                });

        return builder.create();
    }

    private void reload() {
        Intent intent = getActivity().getIntent();
        getActivity().finish();
        Intent LaunchIntent = getActivity().getPackageManager().getLaunchIntentForPackage(App.context.getPackageName());
        startActivity(LaunchIntent);
    }
}

以下是我想要实现的应用程序示例: https://play.google.com/store/apps/details?id=com.funeasylearn.english

它的截图:

Answer 1

试试下面的代码。您必须根据用户选择的语言创建新的语言环境，将其设置为当前语言环境并重新启动您的 Activity 。请注意，如果在您进行区域设置切换时其他 Activity 处于 Activity 状态，您可能必须重新启动它们。

public class LanguageDialogFragment extends DialogFragment {

    private final String[] itemsLang = {"English", "Russian", "Ukraine"};
    private final String[] items = {"en", "ru", "uk"};
    private String lang;

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {

        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        builder.setTitle("Выберите свой родной язык")
            .setSingleChoiceItems(itemsLang, -1, new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int item) {
                    lang = items[item];

                }
            }).setPositiveButton("Ok", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                    //When user submits, restart the activity in
                    //the new language
                    restartActivityInLanguage(lang);

                }
            }).setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                    //Do nothing
                }
            });

        return builder.create();
    }

    private void restartActivityInLanguage(String language) {
        Locale locale = new Locale(language);
        Configuration config = new Configuration();
        config.locale = locale;
        Resources resources = getResources();
        resources.updateConfiguration(config, resources.getDisplayMetrics());
        getActivity().recreate();
    }
}