no NetworkModule installed for scheme "mqtt" of URI "mqtt://..."

[AnkurJagani]

Please fill out the form below before submitting, thank

• [x] Bug exists Release Version 1.1.1 (Java Repository Master Branch)
• [x] Bug exists in Snapshot Version 1.1.2-SNAPSHOT (Android Service Repository Master Branch)
• [ ] Bug is just in the Sample Application.

Android API Version Bug Seen on: Android API Version 28 (Android 9.0) (Tested on emulator device. i.e. Nexus 5 With Provided Google Play Feature)

Android Version Bug Seen on: Android Pie

Please also check that if you have found the bug in the Release version (1.1.1) that you check that it also exists in the Snapshot (1.1.2-SNAPSHOT) before raising a bug.

Description of Bug:

Steps to re-create

1. init MQTT Client. MqttAndroidClient mqttAndroidClient = new MqttAndroidClient(this, "mqtt://test.mosquitto.org:1883", MqttClient.generateClientId());

2. Connect to the initiated client.

    try {                 
            IMqttToken iMqttToken = mqttAndroidClient.connect();
            iMqttToken.setActionCallback(this);
        } catch (MqttException e) {
            e.printStackTrace();
        }

3. That's it. I am facing error in below callback method.

    @Override
    public void onFailure(IMqttToken asyncActionToken, Throwable exception) {
        exception.printStackTrace();        
    }

printStackTrace already shown as below.

Console Log output (if available):

2020-09-28 15:01:54.019 26720-26720/org.oves.mqttdemo W/System.err: java.lang.IllegalArgumentException: no NetworkModule installed for scheme "mqtt" of URI "mqtt://test.mosquitto.org:1883"
2020-09-28 15:01:54.020 26720-26720/org.oves.mqttdemo W/System.err:     at org.eclipse.paho.client.mqttv3.internal.NetworkModuleService.validateURI(NetworkModuleService.java:74)
2020-09-28 15:01:54.020 26720-26720/org.oves.mqttdemo W/System.err:     at org.eclipse.paho.client.mqttv3.MqttAsyncClient.<init>(MqttAsyncClient.java:574)
2020-09-28 15:01:54.020 26720-26720/org.oves.mqttdemo W/System.err:     at org.eclipse.paho.client.mqttv3.MqttAsyncClient.<init>(MqttAsyncClient.java:438)
2020-09-28 15:01:54.020 26720-26720/org.oves.mqttdemo W/System.err:     at org.eclipse.paho.client.mqttv3.MqttAsyncClient.<init>(MqttAsyncClient.java:322)
2020-09-28 15:01:54.020 26720-26720/org.oves.mqttdemo W/System.err:     at org.eclipse.paho.android.service.MqttConnection.connect(MqttConnection.java:289)
2020-09-28 15:01:54.020 26720-26720/org.oves.mqttdemo W/System.err:     at org.eclipse.paho.android.service.MqttService.connect(MqttService.java:329)
2020-09-28 15:01:54.020 26720-26720/org.oves.mqttdemo W/System.err:     at org.eclipse.paho.android.service.MqttAndroidClient.doConnect(MqttAndroidClient.java:467)
2020-09-28 15:01:54.020 26720-26720/org.oves.mqttdemo W/System.err:     at org.eclipse.paho.android.service.MqttAndroidClient.access$200(MqttAndroidClient.java:76)
2020-09-28 15:01:54.020 26720-26720/org.oves.mqttdemo W/System.err:     at org.eclipse.paho.android.service.MqttAndroidClient$MyServiceConnection.onServiceConnected(MqttAndroidClient.java:115)
2020-09-28 15:01:54.020 26720-26720/org.oves.mqttdemo W/System.err:     at android.app.LoadedApk$ServiceDispatcher.doConnected(LoadedApk.java:1730)
2020-09-28 15:01:54.020 26720-26720/org.oves.mqttdemo W/System.err:     at android.app.LoadedApk$ServiceDispatcher$RunConnection.run(LoadedApk.java:1762)
2020-09-28 15:01:54.020 26720-26720/org.oves.mqttdemo W/System.err:     at android.os.Handler.handleCallback(Handler.java:873)
2020-09-28 15:01:54.020 26720-26720/org.oves.mqttdemo W/System.err:     at android.os.Handler.dispatchMessage(Handler.java:99)
2020-09-28 15:01:54.020 26720-26720/org.oves.mqttdemo W/System.err:     at android.os.Looper.loop(Looper.java:193)
2020-09-28 15:01:54.021 26720-26720/org.oves.mqttdemo W/System.err:     at android.app.ActivityThread.main(ActivityThread.java:6669)
2020-09-28 15:01:54.021 26720-26720/org.oves.mqttdemo W/System.err:     at java.lang.reflect.Method.invoke(Native Method)
2020-09-28 15:01:54.021 26720-26720/org.oves.mqttdemo W/System.err:     at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
2020-09-28 15:01:54.021 26720-26720/org.oves.mqttdemo W/System.err:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)

Setup or Configuration of Library

1. Inside application module build.gradle file.

repositories {
    maven {
    	url "https://repo.eclipse.org/content/repositories/paho-releases/"
    }
}

implementation 'org.eclipse.paho:org.eclipse.paho.client.mqttv3:1.2.5'
implementation 'org.eclipse.paho:org.eclipse.paho.android.service:1.1.1'

2. Inside AndroidManifest.xml file.

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.WAKE_LOCK" />
    <uses-permission android:name="android.permission.READ_PHONE_STATE" />

    <application>
    <service android:name="org.eclipse.paho.android.service.MqttService" />
    </application>

Although, it's simple to reproduce the issue, please let me know if you need my help to reproduce it.

[baowenqing]

Has the problem been solved?

[june5753]

You can do like this: Inside proguard.cfg file,add this -keep class org.eclipse.paho.client.mqttv3.internal.* { ; } -keep class org.eclipse.paho.client.mqttv3.spi. { *; }

Good luck!

[marclee44]

Connect to EMQ, please replace mqtt to tcp, like this:MqttAndroidClient mqttAndroidClient = new MqttAndroidClient(this, "tcp://test.mosquitto.org:1883", MqttClient.generateClientId()); Only 5 protocol supported: tcp/ssl/local/ws/wss

[shenhejia]

Connect to EMQ, please replace mqtt to tcp, like this:MqttAndroidClient mqttAndroidClient = new MqttAndroidClient(this, "tcp://test.mosquitto.org:1883", MqttClient.generateClientId()); Only 5 protocol supported: tcp/ssl/local/ws/wss

and replase 'mqtts' to 'ssl' ??