Upgrade Gradle from 8.2.2 to 8.3.0

.gitignore

@@ -15,6 +15,7 @@ gen/
                             
 # Local configuration file (sdk path, etc)
 local.properties
+mqtt.properties
 
 # Windows thumbnail db
 Thumbs.db

app/build.gradle.kts

@@ -1,8 +1,14 @@
+import java.io.FileInputStream
+import java.util.Properties
+
 plugins {
     id("com.android.application")
     id("org.jetbrains.kotlin.android")
 }
 
+val mqttProperties = Properties()
+mqttProperties.load(FileInputStream(rootProject.file("mqtt.properties")))
+
 android {
     namespace = "de.chrissthecoder.store"
     compileSdk = 34
@@ -13,6 +19,11 @@ android {
         targetSdk = 34
         versionCode = 1
         versionName = "1.0"
+
+        buildConfigField("String", "MQTT_USERNAME", mqttProperties.getProperty("username"))
+        buildConfigField("String", "MQTT_PASSWORD", mqttProperties.getProperty("password"))
+        buildConfigField("String", "MQTT_HOST", mqttProperties.getProperty("host"))
+        buildConfigField("String", "MQTT_PORT", mqttProperties.getProperty("port"))
     }
 
     buildTypes {
@@ -36,6 +47,7 @@ android {
 
     buildFeatures {
         viewBinding = true
+        buildConfig = true
     }
 }
 
@@ -48,4 +60,5 @@ dependencies {
     implementation("androidx.lifecycle:lifecycle-viewmodel-ktx:2.7.0")
     implementation("androidx.navigation:navigation-fragment-ktx:2.7.7")
     implementation("androidx.navigation:navigation-ui-ktx:2.7.7")
+    implementation("org.eclipse.paho:org.eclipse.paho.client.mqttv3:1.2.5")
 }

app/src/main/AndroidManifest.xml

@@ -1,14 +1,14 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:tools="http://schemas.android.com/tools">
+          xmlns:tools="http://schemas.android.com/tools">
+    <uses-permission android:name="android.permission.INTERNET" />
 
-    <application
-        android:icon="@mipmap/ic_launcher"
-        android:label="@string/app_name"
-        android:roundIcon="@mipmap/ic_launcher_round"
-        android:supportsRtl="true"
-        android:theme="@style/Theme.Store"
-        tools:targetApi="31">
+    <application android:icon="@mipmap/ic_launcher"
+                 android:label="@string/app_name"
+                 android:roundIcon="@mipmap/ic_launcher_round"
+                 android:supportsRtl="true"
+                 android:theme="@style/Theme.Store"
+                 tools:targetApi="31">
         <activity
             android:name=".MainActivity"
             android:exported="true"
@@ -16,10 +16,8 @@
             android:theme="@style/Theme.Store.NoActionBar">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
-
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
     </application>
-
 </manifest>

app/src/main/java/de/chrissthecoder/store/mqtt/MqttHandler.kt

@@ -0,0 +1,118 @@
+package de.chrissthecoder.store.mqtt
+
+import android.util.Log
+import de.chrissthecoder.store.BuildConfig
+import org.eclipse.paho.client.mqttv3.*
+
+class MqttHandler {
+
+    companion object {
+        private const val LINE = "_________________________"
+
+        private const val CONNECTION_TIMEOUT = 3
+        private const val CONNECTION_KEEP_ALIVE_INTERVAL = 60
+        private const val CONNECTION_CLEAN_SESSION = true
+        private const val CONNECTION_RECONNECT = true
+    }
+
+    private val client: MqttClient
+
+    init {
+        Log.d(this.javaClass.name, "Enter Initializer")
+
+        val clientId: String = "Test Smartphone"
+
+        val serverURL = "tcp://" + BuildConfig.MQTT_HOST + ":" + BuildConfig.MQTT_PORT
+        client = MqttClient(serverURL, clientId, null)
+
+        Log.d(this.javaClass.name, "Set Mqtt Call-Back and Connect")
+
+        client.setCallback(object : MqttCallbackExtended {
+            override fun connectionLost(cause: Throwable?) {
+                Log.w(this.javaClass.name, "Connection Lost")
+            }
+
+            override fun messageArrived(topic: String?, message: MqttMessage?) {
+                Log.d(this.javaClass.name, "Message on Topic: \"" + topic + "\" Arrived")
+                val payload = message?.payload?.toString(Charsets.UTF_8)
+            }
+
+            override fun deliveryComplete(token: IMqttDeliveryToken?) {
+                Log.d(this.javaClass.name, "Message successful delivered")
+            }
+
+            override fun connectComplete(reconnect: Boolean, serverURI: String?) {
+                var message = "Successful "
+                if (reconnect) { message += "re" }
+                message += "connected to: "
+                serverURI?.let { Log.d(this.javaClass.name,  message + it) }
+            }
+        })
+
+        Log.d(this.javaClass.name, "MQTT Credentials:")
+        Log.d(this.javaClass.name, LINE)
+        Log.d(this.javaClass.name, "Client ID: " + clientId)
+        Log.d(this.javaClass.name, "Server URL: " + serverURL)
+        Log.d(this.javaClass.name, "Username: " + BuildConfig.MQTT_USERNAME)
+        Log.d(this.javaClass.name, "Password: " + BuildConfig.MQTT_PASSWORD)
+        Log.d(this.javaClass.name, LINE)
+
+        connect()
+    }
+
+    private fun connect() {
+        try {
+            Log.d(this.javaClass.name, "Connecting to Broker...")
+
+            // Set up the connection options
+            val mqttConnectOptions = MqttConnectOptions()
+            mqttConnectOptions.isAutomaticReconnect = CONNECTION_RECONNECT
+            mqttConnectOptions.isCleanSession = CONNECTION_CLEAN_SESSION
+            mqttConnectOptions.userName = BuildConfig.MQTT_USERNAME
+            mqttConnectOptions.password = BuildConfig.MQTT_PASSWORD.toCharArray()
+            mqttConnectOptions.connectionTimeout = CONNECTION_TIMEOUT
+            mqttConnectOptions.keepAliveInterval = CONNECTION_KEEP_ALIVE_INTERVAL
+
+            client.connect(mqttConnectOptions)
+        } catch (ex: MqttException) {
+            handleConnectionFailure(ex)
+        }
+    }
+
+    private fun handleConnectionFailure(cause: Throwable?) {
+        Log.w(this.javaClass.name,"Failed to connect: ${Log.getStackTraceString(cause)}")
+    }
+
+    fun subscribe(topic: String, qos: Int = 0) {
+        try {
+            Log.d(this.javaClass.name, "Subscribe to Topic: $topic")
+            client.subscribe(topic, qos)
+        } catch (ex: MqttException) {
+            Log.e(this.javaClass.name,"Error on subscribing to Topic: $topic", ex)
+        }
+    }
+
+    fun publish(topic: String, msg: String, qos: Int = 0, retained: Boolean = false) {
+        try {
+            val mqttMessage = MqttMessage(msg.toByteArray())
+            client.publish(topic, mqttMessage.payload, qos, retained)
+            Log.d(this.javaClass.name, "Message published to topic `$topic`: $msg")
+        } catch (e: MqttException) {
+            Log.e(this.javaClass.name, "Error publishing to $topic: " + e.message, e)
+        }
+    }
+
+    fun disconnect() {
+        try {
+            Log.d(this.javaClass.name, "Disconnecting from Broker...")
+            client.disconnect()
+        } catch (e: MqttException) {
+            Log.e(this.javaClass.name, "Error disconnection from Broker: " + e.message, e)
+            e.printStackTrace()
+        }
+    }
+
+    fun isConnected(): Boolean {
+        return client.isConnected
+    }
+}

build.gradle.kts

@@ -1,5 +1,5 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 plugins {
-    id("com.android.application") version "8.2.2" apply false
+    id("com.android.application") version "8.3.0" apply false
     id("org.jetbrains.kotlin.android") version "1.9.22" apply false
 }

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 #Thu Mar 07 13:51:32 CET 2024
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists