对我来说，./gradlew assemblerrelease不再工作，但下面的可以。

./gradlew :app:assembleRelease

感谢这条评论。

如果你得到一个涉及index.android.js的错误。这是因为您正在使用新的React-native版本(我使用的是0.55.4) 只需将"index.android.js"替换为"index.js"

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

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

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.

我有另一个解决办法:- 生成签名密钥 您可以使用keytool生成一个私有签名密钥。在Windows上，keytool必须从C:\Program Files\Java\jdkx.x.x_x\bin.运行

$ 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。在项目文件夹的android/app目录下的Keystore文件。

编辑文件android/app/build。Gradle在你的项目文件夹，并添加签名配置，

android {
....
signingConfigs { 
  release { 

      storeFile file('my-release-key.keystore') 
      storePassword 'yourpassword' 
      keyAlias 'my-key-alias' 
      keyPassword 'yourpassword' 

  } 
}}}


buildTypes {release {signingConfig signingConfigs.release}}

和运行

gradlew assembleRelease

这将给你两个文件在android\app\build\outputs\apk App-release.apk和app-release-unsigned.apk 现在在你的android设备上安装app-release.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。