PeriodicWorkRequest失败雷德米，体内，oppo

Question

在设置PeriodicWorkRequest时，不要每隔15分钟发送一次通知。通知有时在15分钟，有时在16分钟，有时在20分钟，有时在30分钟，有时不显示通知。我想每15小时播放一次通知，比如早上8点到晚上8点。我已经实现了PeriodicWorkRequest，但仍有一些设备没有及时发出通知。

SchedulerActivity

    public class SchedulerActivity extends AppCompatActivity
    {
        @Override
        protected void onCreate(Bundle savedInstanceState)
        {
            super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_scheduler);
        schedulePeriodicWork();
    }

    void schedulePeriodicWork()
    {
        Constraints constraints= new Constraints.Builder().setRequiresBatteryNotLow(false).build();
       
    PeriodicWorkRequest unused = this.periodicWorkRequest = (PeriodicWorkRequest) newPeriodicWorkRequest.Builde((Class<? extends ListenableWorker>) MyWorker.class, 15, TimeUnit.MINUTE).setConstraints(constraints).build();

        WorkManager.getInstance().enqueueUniquePeriodicWork("My Work", ExistingPeriodicWorkPolicy.REPLACE, this.periodicWorkRequest);

    }
}

WorkerClass

public class MyWorker extends Worker
{
   public static MediaPlayer mediaPlayer;
   Context con;

    public MyWorker(@NonNull Context context, @NonNull WorkerParameters workerParams)
    {
        super(context, workerParams);
        this.con=context;

    }

    @RequiresApi(api = Build.VERSION_CODES.Q)
    @NonNull
    @Override
    public Result doWork()
    {
        int startHour=AlramUtility.getFromTimeHours(getApplicationContext()); // 8
        int startMinute=AlramUtility.getFromTimeMinute(getApplicationContext()); //00
        int endHour=AlramUtility.getToTimeHours(getApplicationContext());  //20
        int endMinute=AlramUtility.getToTimeMinute(getApplicationContext()); //00

        Calendar calendar= Calendar.getInstance();
        Calendar startCalendar= Calendar.getInstance();
        startCalendar.set(Calendar.HOUR_OF_DAY,startHour);
        startCalendar.set(Calendar.MINUTE,startMinute);

        Calendar endCalendar= Calendar.getInstance();
        endCalendar.set(Calendar.HOUR_OF_DAY,endHour);
        endCalendar.set(Calendar.MINUTE,endMinute);

        if (calendar.after(startCalendar) && calendar.before(endCalendar)  calendar.equals(startCalendar) && calendar.before(endCalendar) 
                calendar.after(startCalendar) && calendar.equals(endCalendar))
        {
           
            PendingIntent contentIntent = PendingIntent.getActivity(getApplicationContext(), 1, new Intent(getApplicationContext(), MainActivity.class).
                            addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP),
                    PendingIntent.FLAG_CANCEL_CURRENT);
            NewMessageNotification.notify(getApplicationContext(), "Hello", "Hello-", 1, contentIntent);
            playAudio();
        }
        return Result.success();
    }

    private void playAudio()
    {
        try
        {
            this.mediaPlayer = MediaPlayer.create(getApplicationContext(), R.raw.notificationtone);
            if (!this.mediaPlayer.isPlaying())
            {
                this.mediaPlayer.start();
                this.mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
                    public void onCompletion(MediaPlayer mp)
                    {
                        MyWorker.this.mediaPlayer.reset();
                        MyWorker.this.mediaPlayer.release();
                        MyWorker.this.mediaPlayer = null;
                    }
                });
            }
        } catch (Exception e)
        {
            e.printStackTrace();
        }
    }
}

Answer 1

由于这些制造商强加的电池优化，它不起作用。

每当用户离开您的应用程序或应用程序进入后台时，电话就会关闭与您的应用程序相关的所有服务。

没有必要继续寻找它，这是一个已知的问题，希望谷歌能够对他们施加压力，以恢复一个体面的用户体验。