如何从Android中的BroadcastReceiver停止服务？

概述我有一个BroadcastReceiver,它在传递参数时接收GoogleCloudMessaging(GCM)的JSON,根据该参数,服务正在开始该类的全局对象,服务每隔一段时间就将该单元的位置发送到服务器,然后在同一个GCM上向他发送了另一条消息来阻止他,问题是当我停止服务时说这项服务是NULL,但仍然发送该位置

我有一个broadcastReceiver,它在传递参数时接收Google Cloud Messaging(GCM)的JSON,根据该参数,服务正在开始该类的全局对象,服务每隔一段时间就将该单元的位置发送到服务器,然后在同一个GCM上向他发送了另一条消息来阻止他,问题是当我停止服务时说这项服务是NulL,但仍然发送该位置.我想停止服务停止发送位置.

广播接收器

public class GcmbroadcastReceiver extends WakefulbroadcastReceiver {String TAG = "MainActivity";ServicioGPS service1;int nroService;@OverrIDepublic voID onReceive(Context context, Intent intent) {    // == I get the JsON    Bundle extras= intent.getExtras();    // == I check if I want to start the service    if (extras.containsKey("position")) {        service1 = new ServiceGPS(context);        nroService= service1.onStartCommand(intent, 0, 58);        Log.i(TAG, String.valueOf(nroService));    }    else    {        // == I check if I want to stop the service        if (extras.containsKey("stop")) {            // == Exist error in this line(service1 is NulL)            service1.stopSelf();            // == Exist error in this line (service1 is NulL)        }        else        {            // == I Make a notification            Componentname comp = new Componentname(context.getPackagename(),                    GcmIntentService.class.getname());                          Log.i(TAG, "Entro al else del broadcast");            // Starts the service, keePing the device awake.            startWakefulService(context, (intent.setComponent(comp)));            setResultCode(Activity.RESulT_OK);        }    }}

}

错误列表

07-31 19:26:44.115: D/AndroIDRuntime(3292): Shutting down VM07-31 19:26:44.115: W/dalvikvm(3292): threadID=1: thread exiting with uncaught exception             (group=0x41ce0700)07-31 19:26:44.120: E/AndroIDRuntime(3292): FATAL EXCEPTION: main07-31 19:26:44.120: E/AndroIDRuntime(3292): java.lang.RuntimeException: Unable to start  receiver com.ubaldino.demo_gcm.GcmbroadcastReceiver: java.lang.NullPointerException07-31 19:26:44.120: E/AndroIDRuntime(3292):     at androID.app.ActivityThread.handleReceiver(ActivityThread.java:2541)07-31 19:26:44.120: E/AndroIDRuntime(3292):     at androID.app.ActivityThread.access00(ActivityThread.java:159)07-31 19:26:44.120: E/AndroIDRuntime(3292):     at androID.app.ActivityThread$H.handleMessage(ActivityThread.java:1392)07-31 19:26:44.120: E/AndroIDRuntime(3292):     at androID.os.Handler.dispatchMessage(Handler.java:99)07-31 19:26:44.120: E/AndroIDRuntime(3292):     at androID.os.Looper.loop(Looper.java:176)07-31 19:26:44.120: E/AndroIDRuntime(3292):     at androID.app.ActivityThread.main(ActivityThread.java:5419)07-31 19:26:44.120: E/AndroIDRuntime(3292):     at java.lang.reflect.Method.invokeNative(Native Method)07-31 19:26:44.120: E/AndroIDRuntime(3292):     at java.lang.reflect.Method.invoke(Method.java:525)07-31 19:26:44.120: E/AndroIDRuntime(3292):     at com.androID.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1046)07-31 19:26:44.120: E/AndroIDRuntime(3292):     at com.androID.internal.os.ZygoteInit.main(ZygoteInit.java:862)07-31 19:26:44.120: E/AndroIDRuntime(3292):     at dalvik.system.NativeStart.main(Native Method)07-31 19:26:44.120: E/AndroIDRuntime(3292): Caused by: java.lang.NullPointerException07-31 19:26:44.120: E/AndroIDRuntime(3292):     at com.ubaldino.demo_gcm.GcmbroadcastReceiver.onReceive(GcmbroadcastReceiver.java:34)07-31 19:26:44.120: E/AndroIDRuntime(3292):     at androID.app.ActivityThread.handleReceiver(ActivityThread.java:2525)07-31 19:26:44.120: E/AndroIDRuntime(3292):     ... 10 more

解决方法:

您永远不会直接调用onDestroy或任何其他生命周期功能.要停止服务,请使用context.stopService()

另外,要启动服务,请使用context.startService().我不确定你要做什么,但它不会真正启动服务,如果它不会崩溃,将导致框架出现问题.

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