进入工程目录，执行如下命令:

cd android && ./gradlew assembleRelease

对我来说这是可行的(MACOS)

打开终端

cd project_directory

执行此命令

yarn start

打开另一个终端

运行这些命令

cd android
./gradlew assembleRelease

只有这对我有用- yarn android -variant=release

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!

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.

根据Aditya Singh的回答，生成的(未签名的)apk不会安装在我的手机上。我必须使用这里的说明生成一个签名apk。

下面的方法对我很有效:

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

把我的释放钥匙放上去。android/app下的Keystore文件 目录。然后编辑文件 ~ / .gradle / gradle。属性并添加以下内容(替换**** . Properties) 使用正确的密钥存储库密码、别名和密钥密码)

MYAPP_RELEASE_STORE_FILE=my-release-key.keystore
MYAPP_RELEASE_KEY_ALIAS=my-key-alias
MYAPP_RELEASE_STORE_PASSWORD=****
MYAPP_RELEASE_KEY_PASSWORD=****

如果你使用的是MacOS，你可以使用这里的说明将密码存储在钥匙链中，而不是以明文形式存储。

然后编辑app/build。gradle并确保存在以下内容(可能需要添加带有signingConfigs signingConfig的部分):

...
android {
    ...
    defaultConfig { ... }
    signingConfigs {
        release {
            if (project.hasProperty('MYAPP_RELEASE_STORE_FILE')) {
                storeFile file(MYAPP_RELEASE_STORE_FILE)
                storePassword MYAPP_RELEASE_STORE_PASSWORD
                keyAlias MYAPP_RELEASE_KEY_ALIAS
                keyPassword MYAPP_RELEASE_KEY_PASSWORD
            }
        }
    }
    buildTypes {
        release {
            ...
            signingConfig signingConfigs.release
        }
    }
}
...

然后执行cd android && ./gradlew assemblerrelease命令，

对于Windows, cd android，然后执行gradlew assemblerrelease命令，在android/app/build/outputs/apk/app-release.apk或android/app/build/outputs/apk/release/app-release.apk下找到签名的apk