接收通知时，在我的GCMIntentService中使用sWakeLock的NullPointer

Question

WI已在我的Android应用中实施推送通知。

我从我的服务器发送通知，当Androide设备收到通知时，我的sWakeLock对象上有一个空指针。

此外，我从未调用runIntentInService，因为我不知道怎么做！

这是调用堆栈：

10-26 13:31:55.410: E/AndroidRuntime(15351): FATAL EXCEPTION: IntentService[71715548489]
10-26 13:31:55.410: E/AndroidRuntime(15351): java.lang.NullPointerException
10-26 13:31:55.410: E/AndroidRuntime(15351):    at com.example.android.stackwidget.GCMIntentService.onHandleIntent(GCMIntentService.java:42)
10-26 13:31:55.410: E/AndroidRuntime(15351):    at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:65)
10-26 13:31:55.410: E/AndroidRuntime(15351):    at android.os.Handler.dispatchMessage(Handler.java:99)
10-26 13:31:55.410: E/AndroidRuntime(15351):    at android.os.Looper.loop(Looper.java:137)
10-26 13:31:55.410: E/AndroidRuntime(15351):    at android.os.HandlerThread.run(HandlerThread.java:60)

以下是我的GCMIntentService类的源代码：

import android.app.IntentService;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.appwidget.AppWidgetManager;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.PowerManager; 
import android.os.PowerManager.WakeLock;
import android.util.Log;

public class GCMIntentService extends IntentService {

    public GCMIntentService() {
        super(Utils.GCMSenderId);
    }

    private static PowerManager.WakeLock sWakeLock;
    private static final Object LOCK = GCMIntentService.class;
    public String regIdtoSend = "";

    @Override
    protected void onHandleIntent(Intent intent) {

        try {
            String action = intent.getAction();
            if (action.equals("com.google.android.c2dm.intent.REGISTRATION")) {
                handleRegistration(intent);
            } else if (action.equals("com.google.android.c2dm.intent.RECEIVE")) {
                handleMessage(intent);
            }
        }
        finally {
            synchronized(LOCK) {
                sWakeLock.release(); //Null pointer here on sWakeLock
            }
        }
    }

    private void handleRegistration(Intent intent) {
        String regId = intent.getStringExtra("registration_id");
        Utils.registrationId = regId;
        regIdtoSend = regId;
        new LongOperation().execute("");
        Log.e("", "registration id : "+regId);
    }

    private void handleMessage(Intent intent) {
        Utils.notiMsg = intent.getStringExtra("message");

        Context context = getApplicationContext();

        String ns = Context.NOTIFICATION_SERVICE;
        NotificationManager mNotificationManager = (NotificationManager) context.getSystemService(ns);

        int icon = R.drawable.ic_action_lab_white;
        CharSequence tickerText = Utils.notiMsg;
        long when = System.currentTimeMillis();

        Notification notification = new Notification(icon, tickerText, when);
        CharSequence contentTitle = "New notification";
        CharSequence contentText = Utils.notiMsg;
        Intent notificationIntent = new Intent();
        PendingIntent contentIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0);
        notification.setLatestEventInfo(context, contentTitle, contentText, contentIntent);
        mNotificationManager.notify(1, notification);

        Utils.notificationReceived=true;

    }

    static void runIntentInService(Context context,Intent intent){
        synchronized(LOCK) {

            if (sWakeLock == null) {
                PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
                sWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "my_wakelock");
            }
        }
        sWakeLock.acquire();
        intent.setClassName(context, GCMIntentService.class.getName());
        context.startService(intent);
    }
}