效果图

需求分析

这个列表界面一般都是后来手动添加后才现实的，通过分析源码发现通过如下值可控

adb shell settings get system system_locales

zh-CN,ja-JP,en-AT

所以只需查询出这个值，然后加在 SettingProvider 中即可

隐藏 bug

如果客户要求默认语言为 en-AT，且客制列表顺序如上显示，通过之前惯用设置语言反射接口设置后，

有bug版本接口 使用 updateConfiguration

 public void changeSystemLanguage(Locale locale) {//Locale.ENGLISHtry {Object objIActMag, objActMagNative;Class clzIActMag = Class.forName("android.app.IActivityManager");Class clzActMagNative = Class.forName("android.app.ActivityManagerNative");Method mtdActMagNative$getDefault = clzActMagNative.getDeclaredMethod("getDefault");objIActMag = mtdActMagNative$getDefault.invoke(clzActMagNative);Method getConfiguration = clzIActMag.getDeclaredMethod("getConfiguration");Configuration config = (Configuration) getConfiguration.invoke(objIActMag);config.locale = locale;Class clzConfig = Class.forName("android.content.res.Configuration");java.lang.reflect.Field userSetLocale = clzConfig.getField("userSetLocale");userSetLocale.set(config, true);Class[] clzParams = {Configuration.class};Method mtdIActMag$updateConfiguration = clzIActMag.getDeclaredMethod("updateConfiguration", clzParams);mtdIActMag$updateConfiguration.invoke(objIActMag, config);BackupManager.dataChanged("com.android.providers.settings");} catch (Exception e) {e.printStackTrace();}}

首次开机预置语言列表将不显示，重启一次后才会正确显示。经过分析是设置语言接口的锅，

替换新方法即可解决

正常版本接口 使用 updatePersistentConfiguration

private LocaleList makeLocalListData(Context mContext, String locale) {
//        String defaultConfig = "zh-CN,ja-JP,en-AT";String defaultConfig = Settings.System.getString(mContext.getContentResolver(),"system_locales");String[] split = defaultConfig.split(",");int index=0;String newConfig = "";for (int i = 0; i < split.length; i++) {if (split[i].contains(locale)) {index = i;newConfig = split[i];break;}}for (int i = 0; i < split.length; i++) {if (i == index) {continue;}newConfig = newConfig.concat(","+split[i]);}return LocaleList.forLanguageTags(newConfig);}public void changeSystemLocales(Context mContext, String locale) {try {LocaleList localeList = makeLocalListData(mContext, locale);Class iActivityManager = Class.forName("android.app.IActivityManager");Class activityManagerNative = Class.forName("android.app.ActivityManagerNative");Method getDefault = activityManagerNative.getDeclaredMethod("getDefault");Object objIActMag = getDefault.invoke(activityManagerNative);Method getConfiguration = iActivityManager.getDeclaredMethod("getConfiguration");Configuration config = (Configuration) getConfiguration.invoke(objIActMag);config.setLocales(localeList);Class clzConfig = Class.forName("android.content.res.Configuration");java.lang.reflect.Field userSetLocale = clzConfig.getField("userSetLocale");userSetLocale.set(config, true);Class[] clzParams = {Configuration.class};Method updateConfiguration = iActivityManager.getDeclaredMethod("updatePersistentConfiguration", clzParams);updateConfiguration.invoke(objIActMag, config);BackupManager.dataChanged("com.android.providers.settings");} catch (Exception e) {e.printStackTrace();}}