不推荐使用Android context.getResources.updateConfiguration() [英] Android context.getResources.updateConfiguration() deprecated

问题描述

最近一次context.getResources().

Just recently context.getResources().updateConfiguration() has been deprecated in Android API 25 and it is advised to use context.createConfigurationContext() instead.

有人知道如何使用 createConfigurationContext 覆盖android系统区域设置吗?

Does anyone know how createConfigurationContext can be used to override android system locale?

在此之前，将通过:

Configuration config = getBaseContext().getResources().getConfiguration();
config.setLocale(locale);
context.getResources().updateConfiguration(config,
                                 context.getResources().getDisplayMetrics());

推荐答案

受书法的启发，我结束了创建一个上下文包装器. 就我而言，我需要覆盖系统语言，以便为我的应用程序用户提供更改应用程序语言的选项，但是可以使用您需要实现的任何逻辑对其进行自定义.

Inspired by Calligraphy, I ended up creating a context wrapper. In my case, I need to overwrite system language to provide my app users with the option of changing app language but this can be customized with any logic that you need to implement.

    import android.annotation.TargetApi;
    import android.content.Context;
    import android.content.ContextWrapper;
    import android.content.res.Configuration;
    import android.os.Build;

    import java.util.Locale;

    public class MyContextWrapper extends ContextWrapper {

    public MyContextWrapper(Context base) {
        super(base);
    }

    @SuppressWarnings("deprecation")
    public static ContextWrapper wrap(Context context, String language) {
        Configuration config = context.getResources().getConfiguration();
        Locale sysLocale = null;
        if (Build.VERSION.SDK_INT > Build.VERSION_CODES.N) {
            sysLocale = getSystemLocale(config);
        } else {
            sysLocale = getSystemLocaleLegacy(config);
        }
        if (!language.equals("") && !sysLocale.getLanguage().equals(language)) {
            Locale locale = new Locale(language);
            Locale.setDefault(locale);
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
                setSystemLocale(config, locale);
            } else {
                setSystemLocaleLegacy(config, locale);
            }

        }
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
             context = context.createConfigurationContext(config);
        } else {
             context.getResources().updateConfiguration(config, context.getResources().getDisplayMetrics());
            }
        return new MyContextWrapper(context);
    }

    @SuppressWarnings("deprecation")
    public static Locale getSystemLocaleLegacy(Configuration config){
        return config.locale;
    }

    @TargetApi(Build.VERSION_CODES.N)
    public static Locale getSystemLocale(Configuration config){
        return config.getLocales().get(0);
    }

    @SuppressWarnings("deprecation")
    public static void setSystemLocaleLegacy(Configuration config, Locale locale){
        config.locale = locale;
    }

    @TargetApi(Build.VERSION_CODES.N)
    public static void setSystemLocale(Configuration config, Locale locale){
        config.setLocale(locale);
    }
}

并在每个活动中添加以下代码以注入包装器:

and to inject your wrapper, in every activity add the following code:

@Override
protected void attachBaseContext(Context newBase) {
    super.attachBaseContext(MyContextWrapper.wrap(newBase,"fr"));
}

更新10/19/2018 有时，在方向更改或活动暂停/恢复后，Configuration对象将重置为默认系统Configuration，结果，即使我们使用法语"fr"语言环境来包装上下文，我们仍会看到该应用程序显示英语"en"文本.因此，作为一种好的做法，切勿将Context/Activity对象保留在活动或片段的全局变量中.

UPDATE 10/19/2018 Sometimes after orientation change, or activity pause/resume the Configuration object resets to default system Configuration and in result we will see the app displaying English "en" text even though we wrapped the context with French "fr" locale. Therefore and as a good practice, never retain the Context/Activity object in a global variable in activities or fragments.

此外，在MyBaseFragment或MyBaseActivity中创建并使用以下内容:

furthermore, create and use the following in a MyBaseFragment or MyBaseActivity:

public Context getMyContext(){
    return MyContextWrapper.wrap(getContext(),"fr");
}

此做法将为您提供100％无错误的解决方案.

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