Question

我想向用户显示我的appalication是否正在运行的通知这是我试图实现的通知代码。仅在应用程序运行时才会显示通知。但是，即使我的应用程序没有运行，我也希望显示此通知。我怎样才能做到这一点？

public void Notification(String s)
{
        String ns = Context.NOTIFICATION_SERVICE;

        NotificationManager mNotificationManager = (NotificationManager) getSystemService(ns);

        int icon = R.drawable.notification_icon;
        CharSequence tickerText = "Ready for Play time."; // ticker-text
        long when = System.currentTimeMillis();
        Context context = getApplicationContext();
        CharSequence contentTitle = "Play Time";
        CharSequence contentText = "Your match is at "+s;
        Intent notificationIntent = new Intent(this,ScheldueNotification .class);
        PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);
        Notification notification = new Notification(icon, tickerText, when);
        notification.setLatestEventInfo(context, contentTitle, contentText, contentIntent);
        notificationIntent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
        // and this

        mNotificationManager.notify(MY_NOTIFICATION_ID, notification);

        notification.defaults |= Notification.DEFAULT_SOUND;
        notification.vibrate = new long[] { 0, 100, 200, 300 };
        notification.flags |= Notification.FLAG_AUTO_CANCEL;

}

Answer 1

您需要为部分唤醒锁创建WakefulBroadcastReceiver，如果您不这样做，请将其添加到您的项目中 -

public class GcmBroadcastReceiver extends WakefulBroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        // Explicitly specify that GcmIntentService will handle the intent.
        ComponentName comp = new ComponentName(context.getPackageName(),
                GcmIntentService.class.getName());
        // Start the service, keeping the device awake while it is launching.
        startWakefulService(context, (intent.setComponent(comp)));
        setResultCode(Activity.RESULT_OK);
    }
}

Answer 2

在另一个扩展Service类的类中创建并调用此函数。之后，从您的活动开始服务，这将发送通知。请尝试以下代码：

public class MyService extends Service {

    NotificationManager manager;

    @Override
    public void onCreate() {   
    }

    @Override
    public IBinder onBind(Intent intent) {          
        return null;
    }

    @Override
    public void onDestroy() {
        super.onDestroy();

    }

    @Override
    public void onStart(Intent intent, int startId) {
        super.onStart(intent, startId);
        Notification(String s);
    }

    public void Notification(String s)
    {
        String ns = Context.NOTIFICATION_SERVICE;

        NotificationManager mNotificationManager = (NotificationManager) getSystemService(ns);

        int icon = R.drawable.notification_icon;
        CharSequence tickerText = "Ready for Play time.";
        long when = System.currentTimeMillis();
        Context context = getApplicationContext();
        CharSequence contentTitle = "Play Time";
        CharSequence contentText = "Your match is at "+s;
        Intent notificationIntent = new Intent(this,ScheldueNotification .class);
        PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);
        Notification notification = new Notification(icon, tickerText, when);
        notification.setLatestEventInfo(context, contentTitle, contentText, contentIntent);
        notificationIntent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);


        mNotificationManager.notify(MY_NOTIFICATION_ID, notification);

        notification.defaults |= Notification.DEFAULT_SOUND;
        notification.vibrate = new long[] { 0, 100, 200, 300 };
        notification.flags |= Notification.FLAG_AUTO_CANCEL;

}

将此代码写入您将调用服务的活动中。

private Intent myIntent;
myIntent = new Intent(myActivity.this,MyService.class);
startService(myIntent);

显示应用程序是在运行还是在后台运行的通知

2 个答案: