通过 AlarmManager 设置的警报不起作用

Question

我正在创建一个应用程序，如果 google chrome 使用时间过长，我会尝试推送通知。我正在使用可访问性服务来检测正在使用哪个应用程序，并且我已经根据我对何时推送通知的看法编写了条件。它完美地工作到这里。然后我尝试使用 AlarmListener 设置警报，这就是问题所在。作为参数传递给 AlarmListener 的 PendingIntent（触发前台服务，前台服务又触发通知）不起作用。请告诉我哪里出错了：

ApplicationListener.java

       public class ApplicationListenerService extends AccessibilityService {

    public NotificationCompat.Builder createNotification(String title, String content, String channel_id, int priority) {

        NotificationCompat.Builder builder = new NotificationCompat.Builder(this, channel_id)
                .setSmallIcon(R.drawable.notification_icon)
                .setContentTitle(title)
                .setContentText(content)
                .setPriority(priority);
        return builder;
    }

    @Override
    public void onAccessibilityEvent(AccessibilityEvent accessibilityEvent) {

        String packageName = accessibilityEvent.getPackageName().toString();

        if (!packageName.equals("com.android.systemui")) {
            SharedPreferences sharedPref = this.getSharedPreferences(
                    "ApplicationListener", Context.MODE_PRIVATE);
            SharedPreferences.Editor editor = sharedPref.edit();

            String storedPackage = sharedPref.getString("current_running_application", "none");

            if (storedPackage.equals("none")) {
                if (packageName.equals("com.android.chrome")) {
                    //instead of chrome check for all blacklisted apps
                    Log.d("obscure_tag", "chrome has been detected for the first time...starting alarm");
                    editor.putString("current_running_application", packageName);
                    editor.apply();
                    AlarmManager alarmMgr = (AlarmManager) getApplicationContext().getSystemService(Context.ALARM_SERVICE);
                    Intent intent = new Intent(this, AlarmReceiver.class);
                    PendingIntent alarmIntent = PendingIntent.getBroadcast(this, 1,  intent, 0);
                    alarmMgr.setRepeating(AlarmManager.RTC,
                            System.currentTimeMillis(), 60000,
                            alarmIntent);

                }
            } else if (storedPackage.equals(packageName)) {
                Log.d("obscure_tag", "chrome has been detected for the second time..doing nothing");
            } else {
                //delete alarm and stored package
                Log.d("obscure_tag", "different app is detected...alarm getting cancelled...");
                editor.clear();
                editor.apply();
                AlarmManager alarmMgr = (AlarmManager) getApplicationContext().getSystemService(Context.ALARM_SERVICE);
                Intent intent = new Intent(this, AlarmReceiver.class);
                PendingIntent alarmIntent = PendingIntent.getBroadcast(this, 1, intent, 0);
                alarmMgr.cancel(alarmIntent);
            }
        }
    }

    @Override
    public void onInterrupt() {
        Log.d("obscure_tag", "service is interrupted");
    }

    @Override
    protected void onServiceConnected() {
        super.onServiceConnected();

        AccessibilityServiceInfo info = new AccessibilityServiceInfo();
        info.eventTypes = AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED;

        info.feedbackType = AccessibilityServiceInfo.FEEDBACK_SPOKEN;

        info.notificationTimeout = 100;

        this.setServiceInfo(info);
    }
}

AlarmReceiver.java

public class AlarmReceiver extends BroadcastReceiver {

    public NotificationCompat.Builder createNotification(Context context, String title, String content, String channel_id, int priority) {

        NotificationCompat.Builder builder = new NotificationCompat.Builder(context, channel_id)
                .setSmallIcon(R.drawable.notification_icon)
                .setContentTitle(title)
                .setContentText(content)
                .setPriority(priority);
        return builder;
    }

    @Override
    public void onReceive(Context context, Intent arg1) {
        NotificationManagerCompat notificationManager = NotificationManagerCompat.from(context);
        notificationManager.notify(0, createNotification(context, "Demo task", "this task is incomplete", "task_reminders", 4).build());
    }
}

编辑：我现在使用广播接收器而不是前台服务。这仍然不起作用。

Answer 1

我尝试了很多方法，但最终解决我问题的方法是使用 AlarmManager.setAlarmClock 方法...

通过 AlarmManager 设置的警报不起作用

alarm set through AlarmManager isn't working

android

android-pendingintent

android-alarms

foreground-service