Android project added

- Android can now send messages over RabbitMQ to the backend.

android/app/src/main/java/de/nicolasklier/livebeat/FirstFragment.kt

@@ -0,0 +1,31 @@
+package de.nicolasklier.livebeat
+
+import android.os.Bundle
+import androidx.fragment.app.Fragment
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.Button
+import androidx.navigation.fragment.findNavController
+
+/**
+ * A simple [Fragment] subclass as the default destination in the navigation.
+ */
+class FirstFragment : Fragment() {
+
+    override fun onCreateView(
+            inflater: LayoutInflater, container: ViewGroup?,
+            savedInstanceState: Bundle?
+    ): View? {
+        // Inflate the layout for this fragment
+        return inflater.inflate(R.layout.fragment_first, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        view.findViewById<Button>(R.id.button_first).setOnClickListener {
+            findNavController().navigate(R.id.action_FirstFragment_to_SecondFragment)
+        }
+    }
+}

android/app/src/main/java/de/nicolasklier/livebeat/MainActivity.kt

@@ -0,0 +1,40 @@
+package de.nicolasklier.livebeat
+
+import android.content.Intent
+import android.os.Bundle
+import android.view.Menu
+import android.view.MenuItem
+import androidx.appcompat.app.AppCompatActivity
+import com.google.android.material.floatingactionbutton.FloatingActionButton
+import com.google.android.material.snackbar.Snackbar
+
+class MainActivity : AppCompatActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_main)
+        setSupportActionBar(findViewById(R.id.toolbar))
+        startService(Intent(this, TrackerService::class.java))
+
+        findViewById<FloatingActionButton>(R.id.fab).setOnClickListener { view ->
+            Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
+                    .setAction("Action", null).show()
+        }
+    }
+
+    override fun onCreateOptionsMenu(menu: Menu): Boolean {
+        // Inflate the menu; this adds items to the action bar if it is present.
+        menuInflater.inflate(R.menu.menu_main, menu)
+        return true
+    }
+
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        // Handle action bar item clicks here. The action bar will
+        // automatically handle clicks on the Home/Up button, so long
+        // as you specify a parent activity in AndroidManifest.xml.
+        return when (item.itemId) {
+            R.id.action_settings -> true
+            else -> super.onOptionsItemSelected(item)
+        }
+    }
+}

android/app/src/main/java/de/nicolasklier/livebeat/SecondFragment.kt

@@ -0,0 +1,31 @@
+package de.nicolasklier.livebeat
+
+import android.os.Bundle
+import androidx.fragment.app.Fragment
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.Button
+import androidx.navigation.fragment.findNavController
+
+/**
+ * A simple [Fragment] subclass as the second destination in the navigation.
+ */
+class SecondFragment : Fragment() {
+
+    override fun onCreateView(
+            inflater: LayoutInflater, container: ViewGroup?,
+            savedInstanceState: Bundle?
+    ): View? {
+        // Inflate the layout for this fragment
+        return inflater.inflate(R.layout.fragment_second, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        view.findViewById<Button>(R.id.button_second).setOnClickListener {
+            findNavController().navigate(R.id.action_SecondFragment_to_FirstFragment)
+        }
+    }
+}

android/app/src/main/java/de/nicolasklier/livebeat/TrackerService.java

@@ -0,0 +1,96 @@
+package de.nicolasklier.livebeat;
+
+import android.app.Notification;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.app.PendingIntent;
+import android.app.Service;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.graphics.Color;
+import android.os.IBinder;
+import android.util.Log;
+
+import androidx.annotation.Nullable;
+import androidx.core.app.NotificationCompat;
+
+import com.rabbitmq.client.Channel;
+import com.rabbitmq.client.Connection;
+import com.rabbitmq.client.ConnectionFactory;
+
+import java.io.IOException;
+import java.util.concurrent.TimeoutException;
+
+public class TrackerService extends Service {
+
+    private static final int NOTIF_ID = 1;
+    private static final String NOTIF_CHANNEL_ID = "LiveTracker";
+
+    @Nullable
+    @Override
+    public IBinder onBind(Intent intent) {
+        return null;
+    }
+
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        final Connection[] conn = new Connection[1];
+
+        // This thread only connects to RabbitMQ
+        Thread thread = new Thread(new Runnable() {
+            @Override
+            public void run() {
+                ConnectionFactory factory = new ConnectionFactory();
+                factory.setUsername("lineage");
+                factory.setPassword("ZSo$X97GQ547JXL7nGq");
+                factory.setVirtualHost("/");
+                factory.setHost("192.168.178.26");
+                factory.setPort(5672);
+
+                try {
+                    conn[0] = factory.newConnection();
+                    Channel channel = conn[0].createChannel();
+                    channel.queueDeclare("Tracker", false, false, false, null);
+                    channel.basicPublish("", "Tracker", null, "Test message!!!!!!!!!!!!!!!!!".getBytes());
+                    Log.i("RabbitMQ", "run: Published test message");
+                } catch (IOException | TimeoutException e) {
+                    e.printStackTrace();
+                }
+            }
+        });
+
+        thread.start();
+        startForeground();
+
+        return super.onStartCommand(intent, flags, startId);
+    }
+
+    private void startForeground() {
+        Intent noticicationIntent = new Intent(this, MainActivity.class);
+
+        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, noticicationIntent, 0);
+
+        NotificationChannel chan = new NotificationChannel(
+                NOTIF_CHANNEL_ID,
+                "Tracker",
+                NotificationManager.IMPORTANCE_LOW);
+        chan.setLightColor(Color.BLACK);
+        chan.setLockscreenVisibility(Notification.VISIBILITY_SECRET);
+
+        NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
+        assert manager != null;
+        manager.createNotificationChannel(chan);
+
+        startForeground(NOTIF_ID, new NotificationCompat.Builder(this, NOTIF_CHANNEL_ID)
+                .setOngoing(true)
+                .setContentTitle("Livebeat")
+                .setContentText("Tracker is running")
+                .setContentIntent(pendingIntent)
+                .setCategory(Notification.CATEGORY_SERVICE)
+                .setPriority(NotificationManager.IMPORTANCE_LOW)
+                .setChannelId(NOTIF_CHANNEL_ID)
+                .setColor(Color.BLACK)
+                .build());
+    }
+}