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创建Android NativeScript插件

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我正在尝试创建一个允许NativeScript应用程序连接到MQTT服务器的插件 . 当我尝试运行应用程序时，我的应用程序中出现以下错误：

java.lang.RuntimeException：无法启动活动ComponentInfo {org.nativescript.testMQTT / com.tns.NativeScriptActivity}：com.tns.NativeScriptException：调用js方法onCreate失败TypeError：无法读取未定义文件的属性'paho'：“ ，line：1，column：265 StackTrace：Frame：function：'NativeScriptMQTTClient'，file：'/ data / data / org.nativescript.testMQTT / files / app / tns_modules / nativescript-mqtt / mqtt.js'，line：8 ，column：44 Frame：function：''，file：'/ data / data / org.nativescript.testMQTT / files / app / main-page.js'，line：4，column：14 Frame：function：'require' ，file：''，line：1，column：266 Frame：function：'global.loadModule'，file：'/ data / data / org.nativescript.testMQTT / files / app / tns_modules / globals / globals.js'， line：19，column：16 Frame：function：'resolvePageFromEntry'，file：'/ data / data / org.nativescript.testMQTT / files / app / tns_modules / ui / frame / frame-common.js'，line：72， column：40 Frame：function：'Frame.navigate'，file：'/ data / data / org.nativescript.testMQTT / files / app / tns_modules / UI / FR

我在mqtt.android.ts文件中使用以下代码与Paho Java库：

export class NativeScriptMQTTClient { 
    private _topic: String; 
    private _content: String; 
    private _qos: number; 
    private _broker: String; 
    private _clientId: String; 
    private _persistance: org.eclipse.paho.client.mqttv3.persist.MemoryPersistance; 
    private _client: org.eclipse.paho.client.mqttv3.MqttClient; 
    private _connectOptions: org.eclipse.paho.client.mqttv3.MqttConnectOptions; 

    constructor(topic: String, qos: number, broker: string, clientId: String) { 
        this._topic = topic; 
        this._qos = qos; 
        this._broker = broker; 
        this._clientId = clientId; 
        this._persistance = new org.eclipse.paho.client.mqttv3.persist.MemoryPersistance(); 
    } 

    connect() { 
        this._client = new org.eclipse.paho.client.mqttv3.MqttClient(this._broker, this._clientId, this._persistance); 
        this._connectOptions = new org.eclipse.paho.client.mqttv3.MqttConnectOptions(); 
        this._connectOptions.setCleanSession(true); 
        console.log("Connecting to the broker: " + this._broker); 
        this._client.connect(this._connectOptions); 
        console.log("Connected to the broker: " + this._broker); 
        console.log("Publishing message: Hello from NativeScript (Morné)"); 
        this._client.publish(this._topic, "Hello from NativeScript (Morné)"); 
        console.log("Published message: Hello from NativeScript (Morné)"); 
        console.log("Disconnecting from the broker: " + this._broker); 
        this._client.disconnect(); 
        console.log("Disconnected from the broker: " + this._broker); 
    } 
}

我在main-page.ts文件中有以下代码：

import {NativeScriptMQTTClient} from "nativescript-mqtt"; 

let client: NativeScriptMQTTClient = new NativeScriptMQTTClient("MQTT Examples", 2, "tcp://iot.eclipse.org:1883", "NativeScriptClient"); 
client.connect();

任何帮助将不胜感激 .

javascript android mqtt nativescript paho

1 回答

  • 1

    基于MQTT api参考，我注意到以下内容

    它的 MemoryPersistence 并且在你的代码中是MemoryPersist a nce

    this._persistance = new org.eclipse.paho.client.mqttv3.persist.MemoryPersistence();

    确保已将您的.jar文件包含在platforms / Android / libs中（link to MQTT jar file v1.0.2）

    你的package.json应该是这样的（如果你在TypeScript中编码，请确保你有插件中的mqtt.android . js 文件）

    {
  "name": "nativescript-mqtt",
  "version": "0.0.3",
  "main": "mqtt.js",
  "nativescript": {
    "platforms": {
      "tns-android": {
        "version": "1.7.1"
      },
      "tns-ios": {
        "version": "1.7.0"
      }
    }
  }
}

    你还应该像你这样的插件

    var mqttModule = require("nativescript-mqtt");

let client = new mqttModule.NativeScriptMQTTClient("MQTT Examples", 2, "tcp://test.mosquitto.org:1883", "NativeScriptClient");

    此时我正在接受

    JS: Connecting to the broker: tcp://test.mosquitto.org:1883

    从那时起，您应该使用正确的 d.ts 文件和逻辑导出connect方法 . 希望信息能帮助您完成项目！

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