阻止通知在应用关闭时被销毁。

huangapple
go评论122阅读模式
英文:

Stop Notification from being destroyed when the app closes

问题

我正在制作一个安卓应用程序，允许用户按下按钮，显示一个带有倒计时定时器的通知，倒计时一定时间。尽管我已经让通知变为持久化，以便无法被关闭，但当应用程序关闭时，通知会被销毁。

是否有任何方法可以让通知在应用程序关闭后继续运行而不被销毁。

以下是启动通知和定时器的代码：

  1. final NotificationCompat.Builder builder = new NotificationCompat.Builder(context, "notifyLemubit")
  2.                             .setSmallIcon(holder.img_timer.getImageAlpha())
  3.                             .setContentTitle("Timer Running")
  4.                             .setContentText("Time Until Your " + timer.getTimer_name() + " Tree has Fully Grown: " + timer.getTimer_duration_s())
  5.                             .setOngoing(true)
  6.                             .setPriority(NotificationCompat.PRIORITY_DEFAULT);
  8. final NotificationManagerCompat notificationManagerCompat = NotificationManagerCompat.from(context);
  9. notificationManagerCompat.notify(timer.getTimer_id(), builder.build());
  11. new CountDownTimer(10 * ONE_SECOND, ONE_SECOND) {
  13.     @Override
  14.     public void onTick(long ms_until_done) {
  15.         builder.setContentText("Time Until Your " + timer.getTimer_name() + " Tree has Fully Grown: " + ms_until_done / ONE_SECOND);
  16.         notificationManagerCompat.notify(timer.getTimer_id(), builder.build());
  17.     }
  19.     @Override
  20.     public void onFinish() {
  21.         notificationManagerCompat.cancel(timer.getTimer_id());
  22.         final NotificationCompat.Builder builder = new NotificationCompat.Builder(context, "notifyLemubit")
  23.                 .setSmallIcon(holder.img_timer.getImageAlpha())
  24.                 .setContentTitle("Timer Finished")
  25.                 .setContentText("Your " + timer.getTimer_name() + " is Fully Grown!")
  26.                 .setPriority(NotificationCompat.PRIORITY_DEFAULT);
  28.         final NotificationManagerCompat notificationManagerCompat = NotificationManagerCompat.from(context);
  29.         notificationManagerCompat.notify(timer.getTimer_id(), builder.build());
  30.     }
  31. }.start();

感谢任何帮助。

英文:

I am making a android app which will allow the user to press a button and show a notification with a timer counting down for a certain amount of time. Although I have made the notification persistent so it cannot be dismissed, when the app closes the notification gets destroyed.

Is there any way to allow a notification to continue running once the app is closed and not get destroyed.

Here is the code for starting my notification and timer:

  1. final NotificationCompat.Builder builder = new NotificationCompat.Builder(context, "notifyLemubit")
  2. .setSmallIcon(holder.img_timer.getImageAlpha())
  3. .setContentTitle("Timer Running")
  4. .setContentText("Time Until Your " + timer.getTimer_name() + " Tree has Fully Grown: " + timer.getTimer_duration_s())
  5. .setOngoing(true)
  6. .setPriority(NotificationCompat.PRIORITY_DEFAULT);
  7. final NotificationManagerCompat notificationManagerCompat = NotificationManagerCompat.from(context);
  8. notificationManagerCompat.notify(timer.getTimer_id(), builder.build());
  9. new CountDownTimer(10 * ONE_SECOND, ONE_SECOND) {
  10. @Override
  11. public void onTick(long ms_until_done) {
  12. builder.setContentText("Time Until Your " + timer.getTimer_name() + " Tree has Fully Grown: " + ms_until_done / ONE_SECOND);
  13. notificationManagerCompat.notify(timer.getTimer_id(), builder.build());
  14. }
  15. @Override
  16. public void onFinish() {
  17. notificationManagerCompat.cancel(timer.getTimer_id());
  18. final NotificationCompat.Builder builder = new NotificationCompat.Builder(context, "notifyLemubit")
  19. .setSmallIcon(holder.img_timer.getImageAlpha())
  20. .setContentTitle("Timer Finished")
  21. .setContentText("Your " + timer.getTimer_name() + " is Fully Grown!")
  22. .setPriority(NotificationCompat.PRIORITY_DEFAULT);
  23. final NotificationManagerCompat notificationManagerCompat = NotificationManagerCompat.from(context);
  24. notificationManagerCompat.notify(timer.getTimer_id(), builder.build());
  25. }
  26. }.start();

Any help is appreciated, Thanks

答案1

得分: 1

我唯一目前知道的方法是通过扩展 Service 或 IntentService 类来使用前台服务

在您的活动或适配器中，可以使用以下代码来启动服务

  1. context.startService(new Intent(context, PersistentNotificationService.class));

对于此服务，请使用以下代码

  1. public class PersistentNotificationService extends Service {
  3.     private final static int ONE_SECOND = 1000;
  5.     @Override
  6.     public int onStartCommand(Intent intent, int flags, int startId) {
  7.         final NotificationCompat.Builder builder = new NotificationCompat.Builder(this, "notifyLemubit")
  8.                 .setSmallIcon(R.drawable.img_timer)
  9.                 .setContentTitle("Timer Running")
  10.                 .setContentText("Your title goes here")
  11.                 .setOngoing(true)
  12.                 .setPriority(NotificationCompat.PRIORITY_DEFAULT);
  14.         new CountDownTimer(10 * ONE_SECOND, ONE_SECOND) {
  16.             @Override
  17.             public void onTick(long ms_until_done) {
  18.                 // 任何您想要的代码
  19.             }
  21.             @Override
  22.             public void onFinish() {
  23.                 // 要取消，只需关闭服务
  24.                 stopForeground(true);
  25.                 stopSelf();
  26.             }
  27.         }.start();
  29.         startForeground(2342, builder.build());
  31.         return START_STICKY;
  32.     }
  34.     @Nullable
  35.     @Override
  36.     public IBinder onBind(Intent intent) {
  37.         return null;
  38.     }
  39. }
英文:

The only way by far i know is using a Foreground service by extending the Service or IntentService class

And inside your activity or adapter use this to start the service

  1. context.startService(Intent(context,PersistentNotificationService.class))

For the service here use this one

  1. public class PersistentNotificationService extends Service {
  2. private final static int ONE_SECOND = 1000;
  3. @Override
  4. public int onStartCommand(Intent intent, int flags, int startId) {
  5. final NotificationCompat.Builder builder = new NotificationCompat.Builder(this, "notifyLemubit")
  6. .setSmallIcon(R.drawable.img_timer)
  7. .setContentTitle("Timer Running")
  8. .setContentText("Your title goes here")
  9. .setOngoing(true)
  10. .setPriority(NotificationCompat.PRIORITY_DEFAULT);
  11. new CountDownTimer(10 * ONE_SECOND, ONE_SECOND) {
  12. @Override
  13. public void onTick(long ms_until_done) {
  14. // Whatever code you want here
  15. }
  16. @Override
  17. public void onFinish() {
  18. // To cancel , just close the service
  19. stopForeground(true);
  20. stopSelf();
  21. }
  22. }.start();
  23. startForeground(2342, builder.build());
  24. return START_STICKY;
  25. }
  26. @Nullable
  27. @Override
  28. public IBinder onBind(Intent intent) {
  29. return null;
  30. }
  31. }

huangapple
  • 本文由 发表于 2020年9月6日 17:34:19
  • 转载请务必保留本文链接：https://go.coder-hub.com/63762687.html
  • android
  • android-notifications
  • countdowntimer
  • java
匿名

发表评论

匿名网友

:?: :razz: :sad: :evil: :!: :smile: :oops: :grin: :eek: :shock: :???: :cool: :lol: :mad: :twisted: :roll: :wink: :idea: :arrow: :neutral: :cry: :mrgreen:

确定