Ivan Chernykh的答案对于react-native 0.67及以下是正确的 对于react-native 0.68及以上版本的新架构，只要你遵循了Ivan Chernykh提到的步骤

对于android，你必须进入app => src => main => jni文件夹

在MainApplicationTurboModuleManagerDelegate.h

以下更改

static constexpr auto kJavaDescriptor =
      "Lcom/yournewpackagename/newarchitecture/modules/MainApplicationTurboModuleManagerDelegate;";

在MainComponentsRegistry.h

 constexpr static auto kJavaDescriptor =
      "Lcom/yournewpackagename/newarchitecture/components/MainComponentsRegistry;"; 

将包名从“com”更改为“。”Myapp到com.mycompany.myapp(例如)，

对于react应用的iOS应用，在general下使用xcode -。 对于android应用程序，打开构建。在模块级Gradle。android/app文件夹里的那个。你会发现

// ...
defaultConfig {
     applicationId com.myapp
     // ...
}
// ...

改变名称。Myapp给你任何你需要的。

希望这能有所帮助。

这些信息对你很有帮助，所以仔细听……

After updating package name and changing files, don't forget to change in 
package.json and app.json file at the root directory of your react native project

否则，您将得到下面的错误

Invariant Violation: "Your new package name" has not been registered

如果您正在使用Android Studio-

com的变化。Myapp到com.mycompany.myapp

create a new package hierarchy com.mycompany.myapp under android/app/src/main/java Copy all classes from com.myapp to com.mycompany.myapp using Android studio GUI Android studio will take care of putting suitable package name for all copied classes. This is useful if you have some custom modules and don't want to manually replace in all the .java files. Update android/app/src/main/AndroidManifest.xml and android/app/build.gradle (replace com.myapp to com.mycompany.myapp Sync the project (gradle build)

我使用react-native-rename* npm包。通过

npm install react-native-rename -g

然后，从你的React Native项目的根目录，执行以下命令:

react-native-rename "MyApp" -b com.mycompany.myapp

非常简单的方法:

cd /your/project/dir

执行如下命令:

grep -rl "com.your.app" . | xargs sed -i 's/com.your.app/com.yournew.newapp/g'

重命名文件夹

android/app/src/main/java/com/your/app

改变

android/app/src/main/java/com/yournew/newapp