我正在开发使用 Google Cloud Messaging 的即时消息应用程序。当用户收到来自联系人的消息时,我会发送通知。一切正常。我设置了 GCMBroadcastReceiver 和 GCMMessageHandler 。问题是:即使用户当前正在与他的联系人聊天,通知也会始终显示。 如何知道GCMMessageHandler中的应用程序状态不显示通知?
这是GCMBroadcastReceiver:
public class GcmBroadcastReceiver extends WakefulBroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
// Explicitly specify that GcmMessageHandler will handle the intent.
ComponentName comp = new ComponentName(context.getPackageName(),
GcmMessageHandler.class.getName());
// Start the service, keeping the device awake while it is launching.
startWakefulService(context, (intent.setComponent(comp)));
setResultCode(Activity.RESULT_OK);
}
}
这是GCMMessageHandler:
protected void onHandleIntent(Intent intent) {
Bundle extras = intent.getExtras();
GoogleCloudMessaging gcm = GoogleCloudMessaging.getInstance(this);
String messageType = gcm.getMessageType(intent);
mes = extras.getString("message");
if(IM_NOT_IN_THE_CHAT_ACTIVITY)
{
showNotification(mes);
}
我努力获得的是那面旗帜: IM_NOT_IN_THE_CHAT_ACTIVITY。
我如何在IntentService中知道这一点?
答案 0 :(得分:0)
这样做可以解决这个问题:
ActivityManager am = (ActivityManager) this.getSystemService(ACTIVITY_SERVICE);
List< ActivityManager.RunningTaskInfo > taskInfo = am.getRunningTasks(1);
String activity_name = taskInfo.get(0).topActivity.getClassName();
if(activity_name != ACTIVITY_NAME)
showNotification(mes);