ANDROID - 服务由AlarmManager称为不会停止破坏后 [英] ANDROID - service called by AlarmManager wont stop after destroy
问题描述
我有一个服务过得去报警管理器设置为可重复启动:
i have a service getting started by Alarm Manager set to be repeated:
AlarmManager alarm = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
serviceSaveSample = new Intent(RunActivity.this,SaveSampleService.class);
alarmSaveSample = PendingIntent.getService(getApplicationContext(), 9988766, serviceSaveSample, PendingIntent.FLAG_CANCEL_CURRENT);
alarm.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + (secondsToSample*1000) , secondsToSample*1000, alarmSaveSample);
我onDestory功能:
my onDestory function:
AlarmManager alarm = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
if(alarmSaveSample!=null)
alarm.cancel(alarmSaveSample);
if(alarmSendSample!=null)
alarm.cancel(alarmSendSample);
// stop services
if(serviceSendSample!=null)
stopService(serviceSendSample);
if(serviceSaveSample!=null)
stopService(serviceSaveSample);
super.onDestroy();
当我退出程序(通过从主屏幕上的内存清除它)我得到的错误:
when i exit the app (by clearing it from memory in main screen) i get the error:
10-31 13:58:32.800: E/AndroidRuntime(24267):
java.lang.RuntimeException: Unable to start service
com.b2e.m2v.SaveSampleService@411b9ba8 with Intent { flg=0x4
cmp=com.b2e.m2v/.SaveSampleService (has extras) }:
java.lang.NullPointerException 10-31 13:58:32.800:
E/AndroidRuntime(24267): at
android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2801)
10-31 13:58:32.800: E/AndroidRuntime(24267): at
android.app.ActivityThread.access$1900(ActivityThread.java:153) 10-31
13:58:32.800: E/AndroidRuntime(24267): at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
10-31 13:58:32.800: E/AndroidRuntime(24267): at
android.os.Handler.dispatchMessage(Handler.java:99) 10-31
13:58:32.800: E/AndroidRuntime(24267): at
android.os.Looper.loop(Looper.java:137) 10-31 13:58:32.800:
E/AndroidRuntime(24267): at
android.app.ActivityThread.main(ActivityThread.java:5227) 10-31
13:58:32.800: E/AndroidRuntime(24267): at
java.lang.reflect.Method.invokeNative(Native Method) 10-31
13:58:32.800: E/AndroidRuntime(24267): at
java.lang.reflect.Method.invoke(Method.java:511) 10-31 13:58:32.800:
E/AndroidRuntime(24267): at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
10-31 13:58:32.800: E/AndroidRuntime(24267): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562) 10-31
13:58:32.800: E/AndroidRuntime(24267): at
dalvik.system.NativeStart.main(Native Method) 10-31 13:58:32.800:
E/AndroidRuntime(24267): Caused by: java.lang.NullPointerException
10-31 13:58:32.800: E/AndroidRuntime(24267): at
com.b2e.m2v.Controller.getLocation(Controller.java:75) 10-31
13:58:32.800: E/AndroidRuntime(24267): at
com.b2e.m2v.SaveSampleService.onStartCommand(SaveSampleService.java:35)
10-31 13:58:32.800: E/AndroidRuntime(24267): at
android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2784)
10-31 13:58:32.800: E/AndroidRuntime(24267): ... 10 more
任何想法,为什么?
any idea why ?
也许它很重要,这不能不说code里面FragmentActivity运行
maybe its important to say that this code run inside FragmentActivity
推荐答案
,你可以从你的堆栈跟踪看,您遇到了 NullPointerException异常
在控制器
类。
as you can see from your stack trace, you're experiencing a NullPointerException
in your Controller
class.
E/AndroidRuntime(24267): Caused by: java.lang.NullPointerException
10-31 13:58:32.800: E/AndroidRuntime(24267): at com.b2e.m2v.Controller.getLocation(Controller.java:75)
这意味着出事了那里。从您的评论我明白了code看起来有点像这样:
this means that something went wrong there. from your comment I understand that that code looks a little like this:
public Location getLocation(){
Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
return location;
}
这意味着你的变量的LocationManager
是空
当你试图得到它。
this means that your variable locationManager
is null
when you're trying to get it.
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