Xamarin Android SetAndAllowWhileIdel 重复答案

【问题标题】：Xamarin Android SetAndAllowWhileIdel RepeatingXamarin Android SetAndAllowWhileIdel 重复
【发布时间】：2016-08-12 14:44:38
【问题描述】：

在 Android Marshmallow 服务或后台进程被暂停/休眠，一种方法是设置警报管理器计时器以每 09 分钟唤醒一次服务。如果我从活动中设置警报，它只会被调用一次。如何设置重复的SetAndAllowWhileIdle 警报？谢谢

 AlarmManager manager = (AlarmManager)GetSystemService(AlarmService);
 long triggerAtTime = SystemClock.ElapsedRealtime() + (9 * 60 * 1000);
 Intent alarmintent = new Intent(this, typeof(AlarmReceiver));
 PendingIntent pendingintent = PendingIntent.GetBroadcast(this, 0, alarmintent, 0);
 if (Android.OS.Build.VERSION.SdkInt >= BuildVersionCodes.M)
 {
      manager.Cancel(pendingintent);
      manager.SetAndAllowWhileIdle(AlarmType.ElapsedRealtimeWakeup, triggerAtTime, pendingintent);   
 }
 else
 {
      manager.Set(AlarmType.ElapsedRealtimeWakeup, triggerAtTime, pendingintent);
 }

【问题讨论】：

不支持与空闲设备组合的重复警报。可能重复：stackoverflow.com/questions/35629268/…

标签： android xamarin alarmmanager

【解决方案1】：

创建一个粘性服务，您可以在其中定义您的 AlarmManager。该服务将由另一个 AlarmManager 调用，警报将在 9 分钟后重新安排。

【讨论】：

【解决方案2】：

我做过类似的事情。它似乎有效，但它是正确的方法吗？这是一种递归调用，会泄漏内存。

服务

namespace MyApp
{
    [Service(Name = "com.MyApp.simpleservice", Enabled = true, Process = ":bgservice") ]
    public class SimpleService : Service
    {
        private const string TAG = "MyApp.simpleservice";


        public override void OnCreate()
        {
            base.OnCreate();

        }


        public override StartCommandResult OnStartCommand(Intent intent, StartCommandFlags flags, int startId)
        {


            AlarmManager manager = (AlarmManager)GetSystemService(AlarmService);
            long triggerAtTime = SystemClock.ElapsedRealtime() + (5 * 60 * 1000);
            Intent alarmintent = new Intent(this, typeof(AlarmReceiver));
            PendingIntent pendingintent = PendingIntent.GetBroadcast(this, 0, alarmintent, 0);
            if (Android.OS.Build.VERSION.SdkInt >= BuildVersionCodes.M)
            {

                manager.Cancel(pendingintent);
                manager.SetAndAllowWhileIdle(AlarmType.ElapsedRealtimeWakeup, triggerAtTime, pendingintent);
            }
            else
            {
                manager.Set(AlarmType.ElapsedRealtimeWakeup, triggerAtTime, pendingintent);
            }

        DoWork();

            return StartCommandResult.Sticky;
        }

     public void DoWork()
     {
        //Do Some Serious Work here
     }
     public override IBinder OnBind(Intent intent)
         {
            // This example isn't of a bound service, so we just return NULL.
            return null;
        }
}

广播接收器

namespace MyApp
{
    [BroadcastReceiver(Enabled = true) ]
    class AlarmReceiver : BroadcastReceiver

    {
        public override void OnReceive(Context context, Intent intent)
        {
            Intent rintent = new Intent(context, typeof(SimpleService));

            rintent.PutExtra("AlarmReceiver","Broadcast Alarm");
            context.StartService(rintent);
        }
    }
}

【讨论】：