Android foreground service with notification alert

README.md

Start the service

ContextCompat.startForegroundService(this, new Intent(this, MyForegroundService.class));

Permissions

<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />

Manifest

<service
    android:name=".MyForegroundService"
    android:icon="@drawable/ic_notification"
    android:foregroundServiceType="location"
    android:label="MFS" />

User accept permissions (Example)

if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        requestPermissions(new String[]{Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION}, 2000);
    }
}

BaseForegroundServiceJava.java

package com;

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.pm.ServiceInfo;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Binder;
import android.os.Build;
import android.os.IBinder;

import androidx.core.app.NotificationCompat;
import androidx.core.content.ContextCompat;

public abstract class BaseForegroundServiceJava extends Service {

    protected final IBinder mBinder = new LocalBinder();
    protected int REQUEST_CODE, NOTIFICATION_ID = 3000;
    protected String CHANNEL_ID = "ForegroundService_ID";
    protected String CHANNEL_NAME = "ForegroundService Channel";
    protected NotificationManager mNotificationManager;
    protected NotificationCompat.Builder mNotificationBuilder;

    public static void start(Context context, Class<? extends BaseForegroundServiceJava> serviceClass) {
        ContextCompat.startForegroundService(context, new Intent(context, serviceClass));
    }

    public static void stop(Context context, Class<? extends BaseForegroundServiceJava> serviceClass) {
        context.stopService(new Intent(context, serviceClass));
    }

    protected abstract Notification serviceNotification();

    @Override
    public void onCreate() {
        super.onCreate();
        mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        mNotificationBuilder = new NotificationCompat.Builder(this, CHANNEL_ID);
        Notification notification = serviceNotification();
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
            startForeground(
                    NOTIFICATION_ID,
                    notification,
                    Build.VERSION.SDK_INT >= Build.VERSION_CODES.R ? ServiceInfo.FOREGROUND_SERVICE_TYPE_LOCATION : 0);
        } else {
            startForeground(NOTIFICATION_ID, notification);
        }
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        return Service.START_STICKY;
    }

    @Override
    public IBinder onBind(Intent intent) {
        return mBinder;
    }

    protected Notification createNotification(String title, String message, int smallIcon, int bigIcon, Class<?> intentClass) {

        // Get the layouts to use in the custom notification
        // RemoteViews notificationLayout = new RemoteViews(getPackageName(), R.layout.notification_main);
        // notificationLayout.setTextViewText(R.id.txtTitle, message);
        // .setCustomBigContentView(notificationLayout);
        
        mNotificationBuilder.setContentTitle(title)
                .setContentText(message)
                .setAutoCancel(true);

        if (smallIcon != 0) {
            mNotificationBuilder.setSmallIcon(smallIcon);
        }

        if (bigIcon != 0) {
            mNotificationBuilder.setLargeIcon(Bitmap.createScaledBitmap(BitmapFactory.decodeResource(getResources(), bigIcon), 128, 128, true));
        }

        if (intentClass != null) {
            Intent notificationIntent = new Intent(this, intentClass);
            PendingIntent pendingIntent = PendingIntent.getActivity(this, REQUEST_CODE, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
            mNotificationBuilder.setContentIntent(pendingIntent);
        }

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            NotificationChannel channel = new NotificationChannel(CHANNEL_ID, CHANNEL_NAME, NotificationManager.IMPORTANCE_LOW);
            channel.setShowBadge(false);
            channel.setImportance(NotificationManager.IMPORTANCE_LOW);
            mNotificationManager.createNotificationChannel(channel);
        }

        return mNotificationBuilder.build();
    }

    public class LocalBinder extends Binder {
        public BaseForegroundServiceJava getService() {
            return BaseForegroundServiceJava.this;
        }
    }
}

BindServiceJava.java

private MyService myService;
private boolean mBound = false;

private ServiceConnection mConnection = new ServiceConnection() {

    @Override
    public void onServiceConnected(ComponentName className, IBinder service) {
        MyService.LocalBinder binder = (MyService.LocalBinder) service;
        myService = (MyService) binder.getService();
        mBound = true;
    }

    @Override
    public void onServiceDisconnected(ComponentName componentName) {
        mBound = false;
    }
};

@Override
public void onStart() {
    super.onStart();
    bindService(new Intent(this, MyService.class), mConnection, Context.BIND_AUTO_CREATE);
}

@Override
public void onStop() {
    super.onStop();
    unbindService(mConnection);
}

MyForegroundServiceJava.java

public class MyForegroundServiceJava extends BaseForegroundServiceJava {

    @Override
    protected Notification serviceNotification() {
        return createNotification(
                "My App",
                "My App is running",
                R.drawable.ic_notification,
                R.drawable.icon,
                MainActivity.class
        );
    }
}

notification_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/colorPrimaryDark"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:paddingHorizontal="20dp"
        android:paddingVertical="15dp">

        <TextView
            android:id="@+id/txtTitle"
            style="@style/TextAppearance.Compat.Notification.Info.Media"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="This is from my service"
            android:textColor="#fff" />

        <TextView
            android:id="@+id/txtResult"
            style="@style/TextAppearance.Compat.Notification.Title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="5dp"
            android:text="Any text goes here"
            android:textColor="#fff" />

    </LinearLayout>

</LinearLayout>

Thank you for your code, but I do not understand the file BindService.java. Is it suppose to be a class ? Thanks.