第一个

cd android

然后运行

./gradlew installRelease

最后你将能够在这里找到apk。

Project\android\app\build\outputs\apk\release\app-release.apk

您必须创建一个密钥来签署apk。使用下面的方法创建你的密钥:

 keytool -genkey -v -keystore my-app-key.keystore -alias my-app-alias -keyalg RSA -keysize 2048 -validity 10000

在提示时输入密码

生成密钥后，使用它来生成可安装的版本:

 react-native bundle --platform android --dev false --entry-file index.android.js --bundle-output android/app/src/main/assets/index.android.bundle --assets-dest android/app/src/main/res/

使用gradle生成构建

 cd android && ./gradlew assembleRelease

上传APK到你的手机。-r标志将替换现有的应用程序(如果它存在的话)

adb install -r ./app/build/outputs/apk/app-release-unsigned.apk

这里提到了更详细的描述:https://facebook.github.io/react-native/docs/signed-apk-android.html

更新:根据@shashuec和@Fallen的评论

如果出现错误

ENOENT:没有这样的文件或目录，打开'android/app/src/main/assets/index.android.bundle'

执行mkdir android/app/src/main/assets命令

如果您得到“Failure [INSTALL_PARSE_FAILED_NO_CERTIFICATES].”

我尝试使用@Aditya的方法来生成一个无签名APK文件并安装它，但当我在我的Android平板电脑上安装它时，它给了我一个失败的错误[INSTALL_PARSE_FAILED_NO_CERTIFICATES]。

我想这是因为APK文件没有签名，平板电脑对此不满意。所以，在生成React Native包文件后，我能够通过Android Studio生成一个签名的APK文件。

顺便说一句，我们的应用是一款功能齐全的Android应用，已经在Play Store中存在，我们只是将React Native添加到它中，因为它很棒。

总结一下，我的步骤如下:

1)生成React Native包:

react-native bundle --platform android --dev false --entry-file index.android.js --bundle-output android/<your-package-name>/src/main/assets/index.android.bu‌​ndle --assets-dest android/<your-package-name>/src/main/res/ 

2)从Android Studio生成一个Signed APK文件。

3)将签名APK文件安装到USB设备:

adb -d install -r <path_to_signed_apk> 

-d标志只是告诉adb在附加的usb设备上安装，如果您有一个模拟器也在运行。如果你想在任何模拟器上安装，去掉-d标志。

4)利润!

参考react-native关于生成签名APK的官方文档

原生生成签名APK

使用android studio为react的android项目生成签名apk也是一个很好的和简单的选择，在android studio中打开react的android项目并生成击键和签名apk。

Android Studio中的GUI方式

Have the Android app part of the React Native app open in Android Studio (this just means opening the android folder of your react-native project with Android Studio) Go to the "Build" tab at the top Go down to "Build Bundle(s) / APK(s)" Then select "Build APK(s)" This will walk you through a process of locating your keys to sign the APK or creating your keys if you don't have them already which is all very straightforward. If you're just practicing, you can generate these keys and save them to your desktop. Once that process is complete and if the build was successful, there will be a popup down below in Android Studio. Click the link within it that says "locate" (the APK) That will take you to the apk file, move that over to your android device. Then navigate to that file on the Android device and install it.