Android Start a Foreground With Notification Channels

1) MyForeGroundService.class

import android.app.Notification;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.IBinder;
import android.support.v4.app.NotificationCompat;
import android.util.Log;
import android.widget.Toast;

public class MyForeGroundService extends Service {

    private static final String TAG_FOREGROUND_SERVICE = "FOREGROUND_SERVICE";

    public static final String ACTION_START_FOREGROUND_SERVICE = "ACTION_START_FOREGROUND_SERVICE";

    public static final String ACTION_STOP_FOREGROUND_SERVICE = "ACTION_STOP_FOREGROUND_SERVICE";

    public static final String ACTION_STOP = "ACTION_STOP";

    public static final String ACTION_START = "ACTION_START";

    public MyForeGroundService() {
    }

    @Override
    public IBinder onBind(Intent intent) {
        // TODO: Return the communication channel to the service.
        throw new UnsupportedOperationException("Not yet implemented");
    }

    @Override
    public void onCreate() {
        //Todo: Foreground Service onCreate()
        super.onCreate();

    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        if(intent != null)
        {
            String action = intent.getAction();

            switch (action)
            {
                case ACTION_START_FOREGROUND_SERVICE:
                    startForegroundService();
                    Toast.makeText(getApplicationContext(), "Foreground service is started.", Toast.LENGTH_LONG).show();
                    break;
                case ACTION_STOP_FOREGROUND_SERVICE:
                    stopForegroundService();
                    Toast.makeText(getApplicationContext(), "Foreground service is stopped.", Toast.LENGTH_LONG).show();
                    break;
                case ACTION_START:
                    Toast.makeText(getApplicationContext(), "You click Start button.", Toast.LENGTH_LONG).show();
                    break;
                case ACTION_STOP:
                    Toast.makeText(getApplicationContext(), "You click Stop button.", Toast.LENGTH_LONG).show();
                    break;
            }
        }
        return super.onStartCommand(intent, flags, startId);
    }

    /* Used to build and start foreground service. */
    private void startForegroundService()
    {
        Log.d(TAG_FOREGROUND_SERVICE, "Start foreground service.");

        // Create notification default intent.
        Intent intent = new Intent();
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, 0);

        // Create notification builder.
        NotificationCompat.Builder builder = new NotificationCompat.Builder(this);

        // Make notification show big text.
        NotificationCompat.BigTextStyle bigTextStyle = new NotificationCompat.BigTextStyle();
        bigTextStyle.setBigContentTitle("Foreground Service.");
        bigTextStyle.bigText("Android foreground service");
        // Set big text style.
        builder.setStyle(bigTextStyle);

        builder.setWhen(System.currentTimeMillis());
        builder.setSmallIcon(R.mipmap.ic_launcher);
        Bitmap largeIconBitmap = BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher_round);
        builder.setLargeIcon(largeIconBitmap);
        // Make the notification max priority.
        builder.setPriority(Notification.PRIORITY_MAX);
        // Make head-up notification.
        builder.setFullScreenIntent(pendingIntent, true);

        // Add Play button intent in notification.
        Intent playIntent = new Intent(this, MainActivity.class);
        playIntent.setAction(ACTION_START);
        PendingIntent pendingPlayIntent = PendingIntent.getService(this, 0, playIntent, 0);
        NotificationCompat.Action playAction = new NotificationCompat.Action(android.R.drawable.ic_media_play, "Open", pendingPlayIntent);
        builder.addAction(playAction);

        // Add Pause button intent in notification.
        Intent pauseIntent = new Intent(this, MainActivity.class);
        pauseIntent.setAction(ACTION_STOP);
        PendingIntent pendingPrevIntent = PendingIntent.getService(this, 0, pauseIntent, 0);
        NotificationCompat.Action prevAction = new NotificationCompat.Action(android.R.drawable.ic_media_pause, "Close", pendingPrevIntent);
        builder.addAction(prevAction);

        // Build the notification.
        Notification notification = builder.build();

        // Start foreground service.
        startForeground(1, notification);
    }

    private void stopForegroundService()
    {
        Log.d(TAG_FOREGROUND_SERVICE, "Stop foreground service.");

        // Stop foreground service and remove the notification.
        stopForeground(true);

        // Stop the foreground service.
        stopSelf();
    }
}


2) MainActivity.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:gravity="center"
    tools:context=".MainActivity">

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Start"
        android:id="@+id/btnStart"/>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Stop"
        android:id="@+id/btnStop"/>


</LinearLayout>

3) MainActivity.java

public class MainActivity extends AppCompatActivity {

    private Button btnStart, btnStop;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        btnStart = (Button) findViewById(R.id.btnStart);
        btnStop = (Button) findViewById(R.id.btnStop);

        btnStart.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(MainActivity.this, MyForeGroundService.class);
                intent.setAction(MyForeGroundService.ACTION_START_FOREGROUND_SERVICE);
                startService(intent);
            }
        });

        btnStop.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(MainActivity.this, MyForeGroundService.class);
                intent.setAction(MyForeGroundService.ACTION_STOP_FOREGROUND_SERVICE);
                startService(intent);
            }
        });
    }
}