ui/android/src/ca/openprivacy/cwtch/ui/CwtchActivity.java

package ca.openprivacy.cwtch.ui;

import android.app.Notification;
import android.app.NotificationManager;
import android.app.NotificationChannel;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import android.os.Bundle;
import android.content.ComponentName;

import static android.app.Notification.DEFAULT_LIGHTS;
import static android.app.Notification.DEFAULT_SOUND;
import static android.app.Notification.DEFAULT_VIBRATE;
import static android.app.NotificationManager.IMPORTANCE_DEFAULT;
import static android.app.NotificationManager.IMPORTANCE_LOW;
import static android.content.Context.NOTIFICATION_SERVICE;
import static android.content.Intent.FLAG_ACTIVITY_CLEAR_TOP;
import static android.content.Intent.FLAG_ACTIVITY_NEW_TASK;
import static android.os.Build.VERSION.SDK_INT;
import static android.app.Notification.CATEGORY_SERVICE;

public class CwtchActivity extends org.qtproject.qt5.android.bindings.QtActivity
{
    private static NotificationManager m_notificationManager;
    private static Notification.Builder m_builder;
    private static Notification.Builder m_builderOngoing;
    private static CwtchActivity m_instance;

    private static int PRIORITY_MIN = -2; // From NotificationCompat
    private static int PRIORITY_DEFAULT = 0; // From NotificationCompat

    private static String NOTIFICATION_CHANNEL_ID = "cwtch_notification_channel";

    private static int ONGOING_NOTIFICATION_ID = 0;
    private static String ONGOING_NOTIFICATION_ID_NAME = "ongoing";

    private static int CONTENT_NOTIFICATION_ID = 1;
    private static String CONTENT_NOTIFICATION_ID_NAME = "content";


    public CwtchActivity() {
        m_instance = this;
    }

    // https://github.com/bbernhard/qtandroidservices_example/blob/master/source/java/MyCustomAppActivity.java
    @Override
    public void onCreate(Bundle bundle) {
        super.onCreate(bundle);
        Log.i("CwtchActivity", "Starting service!");
        Intent serviceIntent = new Intent(this, ca.openprivacy.cwtch.ui.CwtchService.class);
        ComponentName ret = startService(serviceIntent);
        if (ret == null) {
            Log.i("CwtchActivity", "Started Service: FAILED with null");
        } else {
            Log.i("CwtchActivity", "Started Service: " + ret.flattenToString());
        }
    }

    public static void notify(String s)
    {
        if (m_notificationManager == null) {
            m_notificationManager = (NotificationManager)m_instance.getSystemService(Context.NOTIFICATION_SERVICE);
            createNotificationChannel();
        }

        if (m_builder == null) {
            m_builder = new Notification.Builder(m_instance);
            m_builder.setSmallIcon(R.drawable.ic_launcher);
            m_builder.setContentTitle("Cwtch");
            m_builder.setPriority(PRIORITY_DEFAULT);

        }

        m_builder.setContentText(s);
        m_notificationManager.notify(CONTENT_NOTIFICATION_ID, m_builder.build());
    }

    public static void ongoingNotify(String s)
    {
        if (m_notificationManager == null) {
            m_notificationManager = (NotificationManager)m_instance.getSystemService(Context.NOTIFICATION_SERVICE);
            createNotificationChannel();
        }

        if (m_builderOngoing == null) {
            m_builderOngoing = new Notification.Builder(m_instance);
            m_builderOngoing.setSmallIcon(R.drawable.ic_launcher);
            m_builderOngoing.setContentTitle("Cwtch");
            m_builderOngoing.setPriority(PRIORITY_MIN);

            m_builderOngoing.setWhen(0); // Don't show the time
            m_builderOngoing.setOngoing(true);
            if (SDK_INT >= 21) {
                        m_builderOngoing.setCategory(CATEGORY_SERVICE);
                        //m_builder.setVisibility(VISIBILITY_SECRET);
            }

        }

        m_builderOngoing.setContentText(s);
        m_notificationManager.notify(ONGOING_NOTIFICATION_ID, m_builderOngoing.build());
    }

    private static void createNotificationChannel() {
        // Create the NotificationChannel, but only on API 26+ because
        // the NotificationChannel class is new and not in the support library
        if (SDK_INT >= 26) {
            String description = "Cwtch Ongoing Notification Channel";
            int importance = NotificationManager.IMPORTANCE_LOW;
            NotificationChannel channel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, ONGOING_NOTIFICATION_ID_NAME, importance);
            channel.setDescription(description);
            // Register the channel with the system; you can't change the importance
            // or other notification behaviors after this
            m_notificationManager.createNotificationChannel(channel);

            description = "Cwtch Content Notification Channel";
            importance = NotificationManager.IMPORTANCE_DEFAULT;
            channel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, CONTENT_NOTIFICATION_ID_NAME, importance);
            channel.setDescription(description);
            // Register the channel with the system; you can't change the importance
            // or other notification behaviors after this
            m_notificationManager.createNotificationChannel(channel);

        }
    }
}