以编程方式更改 R.string 的值?

问题描述

我正在寻找一种动态更改字符串资源值的方法.我尝试使用反射，但它声称字段值无效".

I'm looking for a way to change the value of a string resource dynamically. I have tried to use reflection but it claims 'invalid value for field'.

我在布局中使用字符串作为值，但需要将它们替换为不同的语言.

I use the strings for values within the layout, but need to swap them out for different languages.

请参阅下面的附加代码.

Please see the attached code below.

public class Lang{
    public static void langInit(){
        java.lang.reflect.Field[] langStringFields = R.string.class.getFields();

        Log.d(Global.TAG,"--> Lang Listing: " + langStringFields.length);
        Log.d(Global.TAG,"--> Pref for language:");

        String prefInLang = Prefs.cPrefsGet.getString("in_lang","en");

        String fieldName = null;
        String fieldValue = null;
        String newFieldName = null;

        String tmpA = "one";

        for (int i=0; i<langStringFields.length; i++){
            java.lang.reflect.Field field = langStringFields[i];

            fieldName = field.getName();

            try {
                fieldValue = Global.gActivity.getString(field.getInt(R.string.class));
            } catch (Exception e) {
                e.printStackTrace();
            }

            if (fieldName.substring(0,2).equals("lo")){
                try {
                    newFieldName = R.string.class.getField(prefInLang + "_" + fieldName.substring(3)).getName();
                } catch (Exception e) {
                    e.printStackTrace();
                }
                Log.d(Global.TAG,"--> Field: " + fieldName + "value: " + fieldValue + "new field:" + newFieldName);
                try {
                    java.lang.reflect.Field field2 = Class.forName(R.string.class.getName()).getDeclaredField(newFieldName);
                    field2.setAccessible(true);
                    field2.set(R.string.class,tmpA.toString());
                }catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
    }
}

推荐答案

如果您想更改应用程序的当前语言，您可以使用标准的内置本地化功能和 以编程方式更改区域设置.

If you want to change current language for you app you can do it by using standard built-in localization features and changing locale programatically.

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