Question

我正在使用触发服务的WakefulBroadcastReceiver来唤醒我的设备。该服务启动一个Activity，最后通知WakefulBroadcastReceiver结束该作业。我做了一个日志文件，我什么都没发生。当我解锁设备时，几秒钟后，活动开始。我设置闹钟时为什么不这样做？

Manifest包含BroadcastReceiver和Service声明以及WAKE_LOCK权限。

这是WakefulBroadcastReceiver：

public class AlarmBroadcastReceiver extends WakefulBroadcastReceiver {

    public AlarmBroadcastReceiver() {
        Logging.logToFile("Construct broadcast receiver");
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        Intent service = new Intent(context, AlarmService.class);
        startWakefulService(context, service);
        Logging.logToFile("Started wakeful broadcast receiver");
    }
}

这是服务类：

public class AlarmService extends IntentService {

    public AlarmService() {
        super("AlarmService");
        Logging.logToFile("Started intent service");
    }

    @Override
    protected void onHandleIntent(Intent intent) {

        Logging.logToFile("Handle intent service");
        Intent service = new Intent(this, WakeUpActivity.class);
        service.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
        startActivity(service);

        AlarmBroadcastReceiver.completeWakefulIntent(intent);

    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        Logging.logToFile("Destroy intent service");
   }
}

这是我的日志：

At 2016-04-01 23:14: Alarm set at 23:20 
At 2016-04-01 23:23: Construct broadcast receiver
At 2016-04-01 23:23: Started wakeful broadcast receiver
At 2016-04-01 23:23: Started intent service
At 2016-04-01 23:23: Handle intent service
At 2016-04-01 23:23: Started WakeActivity 
At 2016-04-01 23:23: Destroy intent service
At 2016-04-01 23:25: Alarm set at 23:30 
At 2016-04-01 23:33: Construct broadcast receiver
At 2016-04-01 23:33: Started wakeful broadcast receiver
At 2016-04-01 23:33: Started intent service
At 2016-04-01 23:33: Handle intent service
At 2016-04-01 23:33: Destroy intent service
At 2016-04-01 23:33: Started WakeActivity 
At 2016-04-01 23:34: Alarm set at 23:40 
At 2016-04-01 23:42: Construct broadcast receiver
At 2016-04-01 23:42: Started wakeful broadcast receiver
At 2016-04-01 23:42: Started intent service
At 2016-04-01 23:42: Handle intent service
At 2016-04-01 23:42: Destroy intent service
At 2016-04-01 23:42: Started WakeActivity 
At 2016-04-01 23:43: Started WakeActivity 
At 2016-04-01 23:44: Alarm set at 23:49 
At 2016-04-02 00:02: Construct broadcast receiver
At 2016-04-02 00:02: Started wakeful broadcast receiver
At 2016-04-02 00:02: Started intent service
At 2016-04-02 00:02: Handle intent service
At 2016-04-02 00:02: Started WakeActivity 
At 2016-04-02 00:02: Destroy intent service

编辑：这就是我设置警报的方式：

Intent intent = new Intent(SmartClockActivity.this, AlarmBroadcastReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(SmartClockActivity.this, 0, intent, 0);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), pendingIntent);

Answer 1

我建议您使用服务并在那里进行处理。我认为很可能你的应用程序被杀死了，因此链接到创建它的Activity的IntentService也被杀死了。尝试使用完整的服务范围，它必须解决您的问题。

为什么WakefulBroadcastReceiver不会将我的设备从深度睡眠中唤醒？

1 个答案: