Question

我遇到了警报管理器的问题。我不想每小时执行一次我的服务。警报管理器在重新启动后启动并运行良好，即使应用程序未打开或打开和关闭（My PhoneStartReceiver在完成启动后调用launchBackgroundService一次）。我的问题是我在安装后启动应用程序，没有重启电话。在这种情况下，当应用程序强制关闭或销毁时，AlarmManager将被终止。

安装和下次重启之间存在问题。如何在下次重启之前保持启用AlarmManager？

        <receiver
        android:name=".helpers.PeriodicalServiceCaller"
        android:process=":remote"/>
<receiver
        android:name=".helpers.PhoneStartReceiver"
        android:process=":remote">
        <intent-filter>
            <action android:name="android.intent.action.BOOT_COMPLETED"/>
        </intent-filter>
    </receiver>

这是我的launchBackgroundServiceMethod，在两种情况下均会被调用。

public static void launchBackgroundService(){
    // Construct an intent that will execute the PeriodicalServiceCalle

    Intent intent = new Intent(getApplicationContext(), PeriodicalServiceCaller.class);
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

    // Create a PendingIntent to be triggered when the alarm goes off
    final PendingIntent pIntent = PendingIntent.getBroadcast(getApplicationContext(), PeriodicalServiceCaller.REQUEST_CODE,
            intent, PendingIntent.FLAG_UPDATE_CURRENT);
    // Setup periodic alarm every minute
    long firstMillis = System.currentTimeMillis(); // alarm is set right away
    AlarmManager alarm = (AlarmManager) getApplicationContext().getSystemService(Context.ALARM_SERVICE);

    // First parameter is the type: ELAPSED_REALTIME, ELAPSED_REALTIME_WAKEUP, RTC_WAKEUP
    alarm.setInexactRepeating(AlarmManager.RTC_WAKEUP, firstMillis, 1000L, pIntent);

}

PeriodicallServiceCaller代码

public class PeriodicalServiceCaller extends BroadcastReceiver {

public static final int REQUEST_CODE = 12345;

// Triggered by the Alarm periodically (starts the service to run task)
@Override
public void onReceive(Context context, Intent intent) {

        Log.i("START-SERVICE", "PeriodicalServiceCaller");

        Intent i = new Intent(context, MonitorDataService.class);
        context.startService(i);
}

修改我的launchBackgroundService是在安装后由Acitivity启动的，如果是在重新启动后由PhoneStartReceiver启动的

Answer 1

您需要注册BroadcastReceiver以检测您的更新时间。

<receiver android:name=".MyBroadcastReceiver">
   <intent-filter>
     <action android:name="android.intent.action.MY_PACKAGE_REPLACED" />
   </intent-filter>
</receiver>

看看

How to know my Android application has been upgraded in order to reset an alarm?

Answer 2

是在服务中运行launchBackgroundService还是从活动中运行？如果是从服务运行，请检查此答案Background Service getting killed in android

START_STICKY是我错过的。

应用程序关闭后AlarmManager取消，但重启后确定

2 个答案: