如何显示弹出通知，例如什么是应用呼叫通知？

Question

I want to create a pop-up call notification like what's app call notification, but my notification not showing on top like statically, when I slide down the notification bar then I see the notification.

Here is my code I didn't figure out the issue, Any suggestion considers with help .

Thank you

This is my Mainfest.xml

<service
        android:name=".service.CallService"
        android:enabled="true"
        android:exported="false" />

Here is my service class

public class CallService extends Service {

public static final String CHANNEL_ID = "ForegroundServiceChannel";
int startId;
private NotificationPayloadData notificationPayloadData;

public BroadcastReceiver receiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent != null && intent.getExtras() != null) {
            String action = intent.getStringExtra(Constant.CALL_RESPONSE_ACTION_KEY);

            if (action != null && action.equalsIgnoreCase(Constant.CALL_ACCEPT_ACTION)) {

                Intent activityIntent = new Intent(context, VideoCallActivity.class);
                activityIntent.setAction("NOTIFICATION_CALL");
                activityIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                startActivity(activityIntent);

                if (RingtoneHelper.getRingToneMediaManager(context).isPlaying())
                    RingtoneHelper.stopRingtoneAndVibrationLoop();

                stopForeground();
            }
        }
    }
};

@Override
public int onStartCommand(Intent intent, int flags, int startId) {

    this.startId = startId;
    notificationPayloadData = intent.getParcelableExtra(Constant.NOTIF_TYPE_DETAILS);
    createNotificationChannel();
    Intent notificationIntent = new Intent(this.getApplicationContext(), VideoCallActivity.class);
    notificationIntent.setAction("NOTIFICATION_CALL");
    PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);

    Intent receiveCallAction = new Intent(Constant.CALL_ACCEPT_REJECT_VALUE);
    receiveCallAction.putExtra(Constant.CALL_RESPONSE_ACTION_KEY, Constant.CALL_ACCEPT_ACTION);
    PendingIntent receiveCallPendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 1200, receiveCallAction, PendingIntent.FLAG_UPDATE_CURRENT);

    Notification notification = new NotificationCompat.Builder(this, CHANNEL_ID)
            .setColor(ContextCompat.getColor(getApplicationContext(), R.color.colorPrimary))
            .setContentTitle("Incoming Voice Call")
            .setContentText("From Doctor")   //data.getString("remoteUserName")
            .setSmallIcon(R.drawable.ic_phone)
            .setPriority(NotificationCompat.PRIORITY_MAX)
            .setCategory(NotificationCompat.CATEGORY_CALL)
            .setOngoing(true)
            .setAutoCancel(false)
            .addAction(R.drawable.ic_call_receive, "Receive Call", receiveCallPendingIntent)
            .setVibrate(new long[]{100, 200, 300, 400, 500, 400, 300, 200, 400})
            .build();

    registerReceiver(receiver, new IntentFilter(Constant.CALL_ACCEPT_REJECT_VALUE));

    startForeground(startId, notification);

    if (!RingtoneHelper.getRingToneMediaManager(this).isPlaying())
        RingtoneHelper.playRingtoneAndVibrationInLoop(this);

    return START_STICKY;
}

private void createNotificationChannel() {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        NotificationChannel serviceChannel = new NotificationChannel(
                CHANNEL_ID,
                "Foreground Service Channel",
                NotificationManager.IMPORTANCE_HIGH
        );
        serviceChannel.setDescription("Call Notifications");
        serviceChannel.setLockscreenVisibility(Notification.VISIBILITY_PUBLIC);
        NotificationManager manager = getSystemService(NotificationManager.class);
        manager.createNotificationChannel(serviceChannel);
    }
}

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

public void stopForeground() {
    Log.d(this.getClass().getSimpleName(), "stopForeground");
    stopForeground(true);
    stopSelf(startId);
}

@Override
public void onDestroy() {
    super.onDestroy();

    unregisterReceiver(receiver);
}

}

Answer 1

Important

If you'd like to further customize your channel's default notification behaviors, you can call methods such as enableLights() , setLightColor() , and setVibrationPattern() on the NotificationChannel . But remember that once you create the channel, you cannot change these settings and the user has final control of whether these behaviors are active. Other option is to uninstall and install application again. Read more

Examples of conditions that may trigger heads-up notifications include:

The user's activity is in fullscreen mode (the app uses fullScreenIntent). The notification has high priority and uses ringtones or vibrations on devices running Android 7.1 (API level 25) and lower. The notification channel has high importance on devices running Android 8.0 (API level 26) and higher.

Priority:

Notification.PRIORITY_HIGH and Notification.PRIORITY_MAX was deprecated in API level 26. use NotificationCompat instead.

Here is more info :-)