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标题: android - 使用 AlarmManager 重新安排 IntentService - Intent 额外信息被忽略 [打印本页]

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作者: 菜鸟教程小白    时间: 2022-12-9 06:48
标题: android - 使用 AlarmManager 重新安排 IntentService - Intent 额外信息被忽略

我有一个最初通过单击按钮启动的 IntentService:

        Intent intent = new Intent(this, ProximityService.class);
        intent.putExtra("com.hybris.proxi.triggerTime", 5000l);
        PendingIntent pendingIntent = PendingIntent.getService(this,  0,  intent, 0);
        long trigger = System.currentTimeMillis() + (5*1000);
        alarmManager.set(AlarmManager.RTC_WAKEUP, trigger, pendingIntent);

这很好用。但是后来我试图从 Intent 服务中再次执行相同的 Intent 服务。这里的想法是我可以改变下一次执行时间以节省电池。

@Override
protected void onHandleIntent(Intent intent) {
    Log.d("demo", "roximityService... STARTING");
    Log.d("demo", "Intent has extra with key com.hybris.proxi.triggerTime" + intent.hasExtra("com.hybris.proxi.triggerTime"));

    long lastTriggerTime = intent.getLongExtra("com.hybris.proxi.triggerTime", -1);
    Log.d("demo", "Last trigger time: " + lastTriggerTime);

    alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);

    //trigger me again - TODO change this based on closeness to store
    //TODO does not work, somehow triggertime is not incremented
    if (lastTriggerTime < 50000)
    {
        long newTriggerTime = lastTriggerTime * 2;

        Intent serviceIntent = new Intent(this, ProximityService.class);
        serviceIntent.putExtra("com.hybris.proxi.triggerTime", (long)newTriggerTime);
        Log.d("demo","New triggerTime set in new intent is : " + serviceIntent.getLongExtra("com.hybris.proxi.triggerTime", -1));

        PendingIntent pendingIntent = PendingIntent.getService(this,  0,  serviceIntent, 0);
        long trigger = System.currentTimeMillis() + newTriggerTime;
        alarmManager.set(AlarmManager.RTC_WAKEUP, trigger, pendingIntent);
        Log.d("demo", "Alarm was set with trigger time " + newTriggerTime);
    } 
    else {
        Log.d("demo", "Not rescheduling alarm: lastTriggerTime is " + lastTriggerTime);
    }


    Log.d("demo", "roximityService... DONE");

}

问题是

intent.getLongExtra("com.hybris.proxi.triggerTime", -1);

始终返回初始值 5000 - 因此下一个警报不会安排在不断增加的触发时间。不知何故，新触发时间的intent extra设置不起作用...

有什么想法吗？

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Best Answer-推荐答案

您需要使用 PendingIntent.FLAG_UPDATE_CURRENT

更改您的代码 PendingIntent pendingIntent = PendingIntent.getService(this, 0, serviceIntent, 0); 到

PendingIntent pendingIntent = PendingIntent.getService(this,
                        0,  serviceIntent, PendingIntent.FLAG_UPDATE_CURRENT);

关于android - 使用 AlarmManager 重新安排 IntentService - Intent 额外信息被忽略，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/12799367/

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