Question

我使用GCM进行通知

但这个班不起作用

的Manifest.xml

<service
            android:name=".MyGCMListenerService"
            android:exported="false"
            android:enabled="true" >
            <intent-filter>
                <action android:name="com.google.android.c2dm.intent.RECEIVE" />
            </intent-filter>
        </service>

MyGCMListenerService.java

public class MyGCMListenerService extends GcmListenerService {

    @Override
    public void onMessageReceived(String from, Bundle data) {
        String message = data.getString("message");
        Log.i("error", "From: " + from);
        Log.i("error", "Message: " + message);

        if (from.startsWith("/topics/")) {
            // message received from some topic.
        } else {
            // normal downstream message.
        }

        sendNotification(message);
    }


    private void sendNotification(String message) {
        Intent intent = new Intent(this, MainActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0 /* Request code */, intent,
                PendingIntent.FLAG_ONE_SHOT);

        Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
                //.setSmallIcon(R.drawable.ic_stat_ic_notification)
                .setContentTitle("GCM Message")
                .setContentText(message)
                .setAutoCancel(true)
                .setSound(defaultSoundUri)
                .setContentIntent(pendingIntent);

        NotificationManager notificationManager =
                (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

        notificationManager.notify(0 /* ID of notification */, notificationBuilder.build());
    }
}

错误日志：

05-02 23:11:04.894: E/AndroidRuntime(13626): FATAL EXCEPTION: AsyncTask #2
05-02 23:11:04.894: E/AndroidRuntime(13626): java.lang.NullPointerException
05-02 23:11:04.894: E/AndroidRuntime(13626):    at com.google.android.gms.gcm.GcmListenerService.zzo(Unknown Source)
05-02 23:11:04.894: E/AndroidRuntime(13626):    at com.google.android.gms.gcm.GcmListenerService.zza(Unknown Source)
05-02 23:11:04.894: E/AndroidRuntime(13626):    at com.google.android.gms.gcm.GcmListenerService$1.run(Unknown Source)
05-02 23:11:04.894: E/AndroidRuntime(13626):    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
05-02 23:11:04.894: E/AndroidRuntime(13626):    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
05-02 23:11:04.894: E/AndroidRuntime(13626):    at java.lang.Thread.run(Thread.java:841)

Android：MyGCMListenerService服务强制关闭

0 个答案: