我正在开发一个双语的android应用程序,它支持德语和意大利语。
现在我有一个values-it意大利弦和一个values德国弦。
这很有效,除非你在你的设备上使用德语和意大利语。
在这种情况下,应用程序始终使用意大利语,遵循以下计算:

User Setting: de_DE, it_IT
App Resources: default(en), it

Try de_DE -> fail
Try de -> fail
Try it_IT -> fail
Try it -> Success

这可能是因为默认值被隐式地视为values-en,而在我的例子中,它实际上是values-de
有没有办法告诉android,我的应用程序的默认语言环境是de而不是en

最佳答案

我不知道还有没有其他选择,一种方法是用编程的方式。根据Ricardo's great solution,我创建了以下类以更改默认本地:

public class LocaleHelper {

public static Context onAttach(Context context) {
    String lang = Locale.getDefault().getLanguage();
    if(lang.equals("it") || lang.equals("de"))
        return context;
    String locale = "de";
    return setLocale(context, locale);
}

private static Context setLocale(Context context, String localeSpec) {
    Locale locale;
    if (localeSpec.equals("system")) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            locale = Resources.getSystem().getConfiguration().getLocales().get(0);
        } else {
            locale = Resources.getSystem().getConfiguration().locale;
        }
    } else {
        locale = new Locale(localeSpec);
    }
    Locale.setDefault(locale);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
        return updateResources(context, locale);
    } else {
        return updateResourcesLegacy(context, locale);
    }
}

@TargetApi(Build.VERSION_CODES.N)
private static Context updateResources(Context context, Locale locale) {
    Configuration configuration = context.getResources().getConfiguration();
    configuration.setLocale(locale);
    configuration.setLayoutDirection(locale);

    return context.createConfigurationContext(configuration);
}

@SuppressWarnings("deprecation")
private static Context updateResourcesLegacy(Context context, Locale locale) {
    Resources resources = context.getResources();

    Configuration configuration = resources.getConfiguration();
    configuration.locale = locale;
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
        configuration.setLayoutDirection(locale);
    }

    resources.updateConfiguration(configuration, resources.getDisplayMetrics());

    return context;
}
}

你应该在你的活动课上使用它:
@Override
protected void attachBaseContext(Context base) {
    super.attachBaseContext(LocaleHelper.onAttach(base));
}

如果使用uk.co.chrisjenx.calligraphy更改字体,应执行以下操作:
@Override
protected void attachBaseContext(Context base) {
    super.attachBaseContext(CalligraphyContextWrapper.wrap(LocaleHelper.onAttach(base)));
}

更新
使用这个突出的post我设法自动找到提供的语言。因此,当您向资源中添加新的翻译时,无需再硬编码itde或其他提供的翻译。
public class LocaleHelper {

public static Context onAttach(Activity context) {
    Set<String> providedLangs = getProvidedLanguages(context);
    String lang = Locale.getDefault().getLanguage();
    if(providedLangs.contains(lang))
        return context;
    String locale = "de";
    return setLocale(context, locale);
}

private static Set<String> getProvidedLanguages(Activity activity){
    DisplayMetrics metrics = new DisplayMetrics();
    activity.getWindowManager().getDefaultDisplay().getMetrics(metrics);
    Resources r = activity.getResources();
    Configuration c = r.getConfiguration();
    String[] loc = r.getAssets().getLocales();
    Set<String> providedLangs = new HashSet<String>();
    for (int i = 0; i < loc.length; i++) {
        Timber.e("LOCALE: " +  i + ": " + loc[i]);

        c.locale = new Locale(loc[i]);
        Resources res = new Resources(activity.getAssets(), metrics, c);
        String s1 = res.getString(R.string.app_name);
        c.locale = new Locale("");
        Resources res2 = new Resources(activity.getAssets(), metrics, c);
        String s2 = res2.getString(R.string.app_name);

        if(!s1.equals(s2)){
            if(!providedLangs.contains(loc[i]))
                providedLangs.add(loc[i]);
        }
    }

    return providedLangs;
}

private static Context setLocale(Context context, String localeSpec) {
    Locale locale;
    if (localeSpec.equals("system")) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            locale = Resources.getSystem().getConfiguration().getLocales().get(0);
        } else {
            locale = Resources.getSystem().getConfiguration().locale;
        }
    } else {
        locale = new Locale(localeSpec);
    }
    Locale.setDefault(locale);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
        return updateResources(context, locale);
    } else {
        return updateResourcesLegacy(context, locale);
    }
}

@TargetApi(Build.VERSION_CODES.N)
private static Context updateResources(Context context, Locale locale) {
    Configuration configuration = context.getResources().getConfiguration();
    configuration.setLocale(locale);
    configuration.setLayoutDirection(locale);

    return context.createConfigurationContext(configuration);
}

@SuppressWarnings("deprecation")
private static Context updateResourcesLegacy(Context context, Locale locale) {
    Resources resources = context.getResources();

    Configuration configuration = resources.getConfiguration();
    configuration.locale = locale;
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
        configuration.setLayoutDirection(locale);
    }

    resources.updateConfiguration(configuration, resources.getDisplayMetrics());

    return context;
}
}

关于android - Android-定义默认语言环境,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/52718347/

10-11 22:23
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