Question

通过在前台启动服务，我仍然感到很困惑。

目前：我有一项活动在后台启动服务，以执行传感器数据+ gps数据的统计信息。它一直被杀死，所以我在前台开始了。工作良好。但是，当我触摸状态栏中的通知图标时，它似乎开始了一项新活动（我在Pending Intent中说明了这一点）。

所以简而言之，我仍然对整个事情感到困惑。我希望活动能够在前台启动服务，当您单击通知栏时，它会将启动服务的现有活动带到前端。

以下是活动中的一些代码（当前将PendingIntent设置为null）：

private ServiceConnection mConnection = new ServiceConnection() {
     public void onServiceConnected(ComponentName className, IBinder service) {
        // This is called when the connection with the service has been
        // established, giving us the service object we can use to
        // interact with the service. Because we have bound to a explicit
        // service that we know is running in our own process, we can
        // cast its IBinder to a concrete class and directly access it.

        cycleDataService = ((CycleDataProService.LocalBinder) service)
                .getService();
        //Todo the notification bullshaite here...
        String ns = Context.NOTIFICATION_SERVICE;
        NotificationManager mNotificationManager = (NotificationManager) getSystemService(ns);
        int icon = R.drawable.icon;
        CharSequence tickerText = "Hello";
        long when = System.currentTimeMillis();
        Notification notification = new Notification(icon, tickerText, when);
        Context context = getApplicationContext();
        CharSequence contentTitle = "My notification";
        CharSequence contentText = "Hello World!";          
        //Intent notificationIntent = new Intent(cycleDataService, CycleDataProService.class);
        //PendingIntent contentIntent = PendingIntent.getActivity(context, 0, myOwnIntent, PendingIntent.FLAG_UPDATE_CURRENT);
        PendingIntent pi = PendingIntent.getActivity(context, 0, null, 0);

        //PendingIntent contentIntent = PendingIntent.getActivity(context, 0, , 0);
        notification.setLatestEventInfo(context, contentTitle, contentText, pi);
        mNotificationManager.notify(HELLO_ID, notification);
        cycleDataService.startForeground(HELLO_ID, notification);
        /*cycleDataService.startService(new Intent(cycleDataService,
                CycleDataProService.class));*/
        serviceIsRunning = true;
        // Tell the user about this for our demo.
        // Toast.makeText(Binding.this, R.string.local_service_connected,
        // Toast.LENGTH_SHORT).show();
    }

Answer 1

使用这种方式：

Intent notificationIntent = new Intent(context, YourActivity.class);
    PendingIntent contentIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0);
    notification.contentIntent = contentIntent;
    notification.setLatestEventInfo(context, "title", null, contentIntent);

Answer 2

如果您希望活动继续，请使用FLAG_ACTIVITY_SINGLE_TOP，而不是重新启动。

Intent notificationIntent = new Intent(context, YourActivity.class);
notificationIntent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
PendingIntent contentIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0);
notification.contentIntent = contentIntent;
notification.setLatestEventInfo(context, "title", null, contentIntent);

Android PendingIntent for foreGround Service

2 个答案: