android - 是否可以在 android 运行时更新 string.xml 文件？

Question

我想在我的应用程序中动态应用本地化，所以是否可以在 java 文件中定义字符串并将该字符串获取到我们的布局 xml 文件，即我们将 @string/anystringname 替换为 java 文件中定义的字符串到我们的布局文件@somestring定义到java文件????

Answer 1

基本上没有。

您不能动态地操作资源文件。您需要自己实现此类功能。

这是一个例子:

英语.json

{
    "hello": "Hello"
}

法语.json

{
    "hello": "Bonjour"
}

public class StringManager {
    private static StringManager sInstance = null;
    private static String sDefaultLanguageCode = "en";

    private Map<String, JSONObject> mLanguageMap = new ArrayMap<>();

    private StringManager() {
    }

    public static StringManager getInstance() {
        if (sInstance == null) {
            synchronized (StringManager.class) {
                if (sInstance == null)
                    sInstance = new StringManager();
            }
        }
        return sInstance;
    }

    public static void setDefaultLanguageCode(String languageCode) {
        sDefaultLanguageCode = languageCode;
    }

    public void addLanguage(String languageCode, JSONObject json) {
        mLanguageMap.put(languageCode, json);
    }

    public String getString(String key) {
        return mLanguageMap.get(mDefaultLanguageCode).getString(key);
    }

    public String getString(String languageCode, String key) {
        return mLanguageMap.get(languageCode).getString(key);
    }
}

public class SomeActivity extends Activity {
    ...
    public void initStringResources() {
        // assume englishJsonObject is created from english.json
        StringManager.getInstance().addLanguage("en", englishJsonObject);
        StringManager.getInstance().addLanguage("fr", frenchJsonObject);

        StringManager.setDefaultLanguageCode("fr");
    }

    public void useSomeString() {
        String helloString = StringManager.getInstance().getString("hello");
        // helloString will be "Bonjour"

        // and you can get specific language string
        String englishHelloString = StringManager.getInstance().getString("en", "hello");
    }

    // this may be called from Button or other UI component
    public void onLanguageChanged(String languageCode) {
        StringManager.setDefaultLanguageCode(languageCode);
        // and update UI components that display localized strings
    }
}