fedilab-Android-App/app/src/main/java/app/fedilab/android/services/UnifiedPushService.java

package app.fedilab.android.services;

import android.content.Context;
import android.content.SharedPreferences;
import android.database.sqlite.SQLiteDatabase;
import android.util.Log;

import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.unifiedpush.android.connector.MessagingReceiver;
import org.unifiedpush.android.connector.MessagingReceiverHandler;

import java.util.List;

import app.fedilab.android.activities.BaseMainActivity;
import app.fedilab.android.activities.LiveNotificationSettingsAccountsActivity;
import app.fedilab.android.asynctasks.PostSubscriptionAsyncTask;
import app.fedilab.android.client.APIResponse;
import app.fedilab.android.client.Entities.Account;
import app.fedilab.android.helper.Helper;
import app.fedilab.android.helper.PushNotifications;
import app.fedilab.android.interfaces.OnPostSubscription;
import app.fedilab.android.sqlite.AccountDAO;
import app.fedilab.android.sqlite.Sqlite;

import static android.content.Context.MODE_PRIVATE;

class handler implements MessagingReceiverHandler {

    private Context context;
    private String endpoint;

    @Override
    public void onNewEndpoint(@Nullable Context context, @NotNull String endpoint) {
        final SharedPreferences sharedpreferences = context.getSharedPreferences(Helper.APP_PREFS, MODE_PRIVATE);
        SharedPreferences.Editor editor = sharedpreferences.edit();
        editor.putString(Helper.SERVER_ENDPOINT, endpoint);
        editor.apply();

        new PushNotifications()
                .registerPushNotifications(context, endpoint);
    }

    @Override
    public void onRegistrationFailed(@Nullable Context context) {
        // Toast ?
    }

    @Override
    public void onRegistrationRefused(@Nullable Context context) {
        // Toast ?
    }

    @Override
    public void onUnregistered(@Nullable Context context) {
        // Remove endpoint & ServerKey
    }

    @Override
    public void onMessage(@Nullable Context context, @NotNull String message) {
        new PushNotifications()
                .displayNotification(context, message);
    }
}

public class UnifiedPushService extends MessagingReceiver {
    public UnifiedPushService() {
        super(new handler());
    }
}