React Native MQTT.js在Android 9+上不起作用 [英] React Native MQTT.js does not work on Android 9+

问题描述

我正在使用 React Native 0.61 (CLI)构建Android应用 并在此处使用常见的MQTT.js软件包: https://www.npmjs.com/package/mqtt (v.3.0.0)

I am building an Android app using React Native 0.61 (CLI) and use common MQTT.js packages here: https://www.npmjs.com/package/mqtt (v.3.0.0)

这是我的 build.gradle

buildToolsVersion = "28.0.3"
minSdkVersion = 25
compileSdkVersion = 28
targetSdkVersion = 28
supportLibVersion = "28.0.0"

我使用 WebSocket 协议连接到自己的mqtt代理.

I use WebSocket protocol to connect to my own mqtt broker.

在调试模式下，所有功能均可在任何手机上完美运行.但是很奇怪，当我通过命令释放APK ( gradlew assembleRelease (已签名))，它无法连接到Android 9+(两个模拟器)上的代理(Android 8运行良好)

In debug mode, everything works perfectly on any phone. But weird that when I release APK by command (gradlew assembleRelease (signed)), it can not connect to the broker on Android 9+ (both emulator) (Android 8 work well)

编译为本机代码时似乎出现了问题.

It seems there was a problem when compiling to native code.

推荐答案

这可能是因为从Andoird 9开始不允许使用默认的HTTP.您可以在AndroidMainfest.xml中添加以下内容.

it may because the HTTP is default is disallowed since Andoird 9.you can add the following at the AndroidMainfest.xml.

<application
    android:usesCleartextTraffic="true"

您还可以使用配置XML.为此，您可以看到此博客

you can also use a config XML. for that you can see this blog

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