Question

我正在尝试使用AlarmManager每10分钟唤醒一次我的服务以完成一些工作。我创建了一个BroadcastReceiver，重复警报并注册它（我服务中的所有三个）。但我没有收到广播。

public class MainService extends Service implements ... {

    public static final String BROADCAST_ALARM = "broadcast_alarm";
    //60 seconds
    private final int activityCheckingTimeIntervalInMilisec = 60*1000;
    AlarmManager alarmManager;

    private final BroadcastReceiver alarmReceiver = new BroadcastReceiver(){
        @Override
        public void onReceive(Context context, Intent intent) {
            Log.d(TAG, "NEW ALARM");
        }
    };

    ...

    @Override
    public void onCreate() {
        super.onCreate();

        PendingIntent alarmIntent = PendingIntent.getBroadcast(this,0, new Intent(BROADCAST_ALARM),PendingIntent.FLAG_UPDATE_CURRENT);

        alarmManager = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
        alarmManager.setInexactRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, SystemClock.elapsedRealtime()+100, activityCheckingTimeIntervalInMilisec, alarmIntent);

        LocalBroadcastManager.getInstance(getBaseContext()).registerReceiver(alarmReceiver, new IntentFilter(BROADCAST_ALARM));

        //if I comment out the line below, the alarmReceiver receives the brodcast and prints "NEW ALARM"
        //LocalBroadcastManager.getInstance(this).sendBroadcast(new Intent(BROADCAST_ALARM));

        ...
    }

}

如果我发送广播：

LocalBroadcastManager.getInstance(this).sendBroadcast(new Intent(BROADCAST_ALARM));

（参见代码中的注释）日志打印“NEW ALARM”（仅一次）。所以代码的BroadcastReceiver部分似乎有效。

我还试图获取所有警报的转储，以查看alarmManager是否与

配合使用

adb shell dumpsys alarm > dump.txt.

dump.txt（相关行）：

Current Alarm Manager state:
nowRTC=1526118229704=2018-05-12 09:43:49 nowELAPSED=+2h25m50s271ms
Next non-wakeup alarm: +10s296ms = 2018-05-12 09:44:00
Next wakeup: +59s73ms = 2018-05-12 09:44:48
Num time change events: 0

Pending alarm batches: 17
...

Batch{23bf2d95 num=1 start=8809344 end=-8854344}:
  ELAPSED_WAKEUP #0: Alarm{e87feaa type 2 when 8809344 com.example.example.example}
    tag=*walarm*:broadcast_alarm
    type=2 whenElapsed=+59s73ms when=+59s73ms
    window=-1 repeatInterval=60000 count=0
    operation=PendingIntent{1681173c: PendingIntentRecord{36219342 com.example.example.example broadcastIntent}}

com.google.android.finsky.services.DailyHygiene
    u0a63:com.jx.shealth +2s308ms running, 4 wakeups:
     +2s308ms 4 wakes 4 alarms: *walarm*:com.jx.shealth.action.CHECK_TARGET
    u0a72:com.example.example.example +131ms running, 24 wakeups:
     +131ms 24 wakes 24 alarms: *walarm*:broadcast_alarm

我也尝试使用它代替getBaseContext（）。

为什么我的BroadcastReceiver无法在服务中使用AlarmManager广播？

0 个答案: