1. 示例图
2.具体实现
如何实现上述示例，且不需要重新打开App
①自定义 MainApplication 实现 Application ，定义两个变量：
class MainApplication : Application() { object GlobalDpData { var language: String = "" var defaultLanguage: String = "en"
}
override fun onCreate() {defaultLanguage = Locale.getDefault().language
val cacheLanguage = "保存在手机App本地的切换后的语言，可用sp或文件实现" language = if (cacheLanguage.isNullOrEmpty()) {
defaultLanguage
} else {
cacheLanguage
}}
}
②在baseActivity中添加语言实现
override fun attachBaseContext(baseContext: Context) {var language = MainApplication.GlobalDpData.languageif (language.isEmpty()) {val default = MainApplication.GlobalDpData.defaultLanguagelanguage = "保存在手机App本地的切换后的语言，可用sp或文件实现" }// 创建一个ContextWrapper对象val context = newWrap(baseContext, language)// 将新的的Context设置给Activitysuper.attachBaseContext(context)
}
/*** 创建ContextWrapper对象，*/
private fun newWrap(context: Context, language: String): ContextWrapper {val configuration = context.resources.configurationconfiguration.fontScale = 1fval locale = Locale(language)val localeList = LocaleList(locale)LocaleList.setDefault(localeList)configuration.setLocales(localeList)
