当通知进入活动时*关闭

问题描述：

当我在活动（groups.class）我打电话给这个函数（活动内声明）：

public void lookForGroups() 
    { 
     int seconds = 20; 

      Intent myIntent = new Intent(Groups.this, GroupsTaskAlarmChecker.class); 
      pendingIntent = PendingIntent.getService(Groups.this, 0, myIntent, 0); 

      AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE); 

      Calendar calendar = Calendar.getInstance(); 
      calendar.setTimeInMillis(System.currentTimeMillis()); 
      calendar.add(Calendar.SECOND, 10); 
      alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), seconds * 1000, pendingIntent); 

    }

我在连接到网络PHP和收到回复里面的服务和然后我创建一个Notification（在Service中声明）发送一个消息给一个调用函数notifyNew（）的处理函数。

public class GroupsTaskAlarmChecker extends Service implements Runnable { 
     public void run() { php call and send msg to handler to call notify function} 
     private void notifyNew() { 
     Intent intentNot = new Intent(this, Groups.class); 

     Notification notification = new Notification(R.drawable.icon, "changes", System.currentTimeMillis()); 
     notification.setLatestEventInfo(this, getString(R.string.app_name), getString(R.string.notifiedGroup), 
       PendingIntent.getActivity(this, 0, intentNot, PendingIntent.FLAG_CANCEL_CURRENT)); 

     notification.defaults |= Notification.DEFAULT_SOUND; 
     notification.defaults |= Notification.DEFAULT_VIBRATE; 

     notification.defaults |= Notification.DEFAULT_LIGHTS; 
     notification.flags = Notification.FLAG_AUTO_CANCEL; 

     try 
     { 
      notification.ledARGB = 0xff00ff00; 
      notification.ledOnMS = 300; 
      notification.ledOffMS = 1000; 
      notification.flags |= Notification.FLAG_SHOW_LIGHTS; 
     }catch(Exception ex) 
     {   
     }   
     manager.notify(APP_ID_NOTIFICATION, notification); 
} 
}

我想再次触摸通知时再次进入活动“组”。所有这一切工作正常，但是当我触摸通知logcat的显示...

03-01 17:52:50.663: E/AndroidRuntime(17019): FATAL EXCEPTION: main 
03-01 17:52:50.663: E/AndroidRuntime(17019): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.org.tfc_android/com.org.tfc_android.Groups}: java.lang.NullPointerException 
03-01 17:52:50.663: E/AndroidRuntime(17019): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2304) 
03-01 17:52:50.663: E/AndroidRuntime(17019): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2354) 
03-01 17:52:50.663: E/AndroidRuntime(17019): at android.app.ActivityThread.access$600(ActivityThread.java:150) 
03-01 17:52:50.663: E/AndroidRuntime(17019): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1244) 
03-01 17:52:50.663: E/AndroidRuntime(17019): at android.os.Handler.dispatchMessage(Handler.java:99) 
03-01 17:52:50.663: E/AndroidRuntime(17019): at android.os.Looper.loop(Looper.java:137) 
03-01 17:52:50.663: E/AndroidRuntime(17019): at android.app.ActivityThread.main(ActivityThread.java:5193) 
03-01 17:52:50.663: E/AndroidRuntime(17019): at java.lang.reflect.Method.invokeNative(Native Method) 
03-01 17:52:50.663: E/AndroidRuntime(17019): at java.lang.reflect.Method.invoke(Method.java:511) 
03-01 17:52:50.663: E/AndroidRuntime(17019): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795) 
03-01 17:52:50.663: E/AndroidRuntime(17019): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562) 
03-01 17:52:50.663: E/AndroidRuntime(17019): at dalvik.system.NativeStart.main(Native Method) 
03-01 17:52:50.663: E/AndroidRuntime(17019): Caused by: java.lang.NullPointerException 
03-01 17:52:50.663: E/AndroidRuntime(17019): at com.org.tfc_android.Groups.onCreate(Groups.java:61) 
03-01 17:52:50.663: E/AndroidRuntime(17019): at android.app.Activity.performCreate(Activity.java:5104) 
03-01 17:52:50.663: E/AndroidRuntime(17019): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) 
03-01 17:52:50.663: E/AndroidRuntime(17019): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2258) 
03-01 17:52:50.663: E/AndroidRuntime(17019): ... 11 more

有强制关闭，但后来去正确的活动团体有人能帮助我吗？

求解：求解add intentNot.addFlags（Intent.FLAG_ACTIVITY_SINGLE_TOP）;当在通知之前创建Intent时。

您是否在意图中添加了任何标志。它是什么类型的活动（例如singleTon）？ – 2013-03-01 17:32:38

您是否尝试过在新的上下文行中使用getApplicationcontext（）？我有时觉得这有帮助。 – 2013-03-01 17:44:18

@KnightTemplar从你的堆栈跟踪：“at com.org.tfc_android.Groups.onCreate（Groups.java:61）”你能说Groups.java的第61行是什么吗？ – 2013-03-01 17:44:23

答

我解决了add intentNot.addFlags（Intent.FLAG_ACTIVITY_SINGLE_TOP）;感谢@FahadIshaque

当通知进入活动时*关闭

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