android – 当应用程序关闭或应用程序处于后台时,获取两次GCM PUSH通知

概述我在我的应用程序中实现了gcm推送通知.一切都很好,我也收到通知. 问题： >当应用程序处于后台或终止状态时,我一次收到2个通知. >当应用程序处于前台时,只能获得我想要的1个通知. App should get only 1 notification as requirement but unfortunately facing undefined situation. 我的代码如下： 用于接收 我在我的应用程序中实现了gcm推送通知.一切都很好,我也收到通知.

问题：

>当应用程序处于后台或终止状态时,我一次收到2个通知.
>当应用程序处于前台时,只能获得我想要的1个通知.

App should get only 1 notification as requirement but unfortunately facing undefined situation.

我的代码如下：

用于接收消息的GCmpushReceiverService类.

public class GCmpushReceiverService extends GcmListenerService {//This method will be called on every new message received@OverrIDepublic voID onMessageReceived(String from,Bundle data) {    //Getting the message from the bundle    String message = data.getString("message");    //displaying a notiffication with the message    Log.e("MeSs",""+message);    sendNotification(this,message,"traccar App");    sendNotification(message);}//This method is generating a notification and displaying the notification  //When in frontprivate voID sendNotification(Context context,String notificationText,String notificationTitle) {    PowerManager pm = (PowerManager) context            .getSystemService(Context.POWER_SERVICE);    PowerManager.WakeLock wakeLock = pm.newWakeLock(            PowerManager.PARTIAL_WAKE_LOCK,"");    wakeLock.acquire();    Intent intent = new Intent(this,Home.class);    intent.putExtra("ChatFragment","newChatFound");    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_top);    int requestCode = 0;    PendingIntent pendingIntent = PendingIntent.getActivity(this,requestCode,intent,PendingIntent.FLAG_ONE_SHOT);    Uri sound = ringtoneManager.getDefaultUri(ringtoneManager.TYPE_NOTIFICATION);    NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(            context)            .setSmallicon(R.drawable.BUG_log_two)            .setcolor(color.RED)            .setContentTitle(notificationTitle)            .setContentText(notificationText)            .setDefaults(Notification.DEFAulT_ALL)            .setautoCancel(true)            .setContentIntent(pendingIntent);    notificationmanager notificationmanager = (notificationmanager)getSystemService(Context.NOTIFICATION_SERVICE);    notificationmanager.notify(0,notificationBuilder.build()); //0 = ID of notification    wakeLock.release();}private voID sendNotification(String message) {    Intent intent = new Intent(this,Home.class);    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_top);    int requestCode = 0;    PendingIntent pendingIntent = PendingIntent.getActivity(this,PendingIntent.FLAG_ONE_SHOT);    Uri sound = ringtoneManager.getDefaultUri(ringtoneManager.TYPE_NOTIFICATION);    NotificationCompat.Builder noBuilder = new NotificationCompat.Builder(this)            .setSmallicon(R.mipmap.ic_launcher)            .setContentText(message)            .setautoCancel(true)            .setContentIntent(pendingIntent);    notificationmanager notificationmanager = (notificationmanager)getSystemService(Context.NOTIFICATION_SERVICE);    notificationmanager.notify(0,noBuilder.build()); //0 = ID of notification}}

清单文件代码：

<!-- GCM -->    <receiver        androID:name="com.Google.androID.gms.gcm.GcmReceiver"        androID:exported="true"        androID:permission="com.Google.androID.c2dm.permission.SEND">        <intent-filter>            <action androID:name="com.Google.androID.c2dm.intent.RECEIVE" />            <category androID:name="com.vk.trackeruser" />        </intent-filter>    </receiver>    <!-- GCM Receiver Service -->    <service        androID:name=".Notification.GCmpushReceiverService"        androID:exported="false">        <intent-filter>            <action androID:name="com.Google.androID.c2dm.intent.RECEIVE" />        </intent-filter>    </service>    <!-- GCM Registration Intent Service -->    <service        androID:name=".Notification.GCMRegistrationIntentService"        androID:exported="false">        <intent-filter>            <action androID:name="com.Google.androID.gms.iID.InstanceID" />        </intent-filter>    </service>

GCMRegistrationIntentService类：

public class GCMRegistrationIntentService extends IntentService {//Constants for success and errorspublic static final String REGISTRATION_SUCCESS = "RegistrationSuccess";public static final String REGISTRATION_ERROR = "RegistrationError";public static final String SenderID = "my ID with numeric number ex 9897979";//Class constructorpublic GCMRegistrationIntentService() {    super("");}@OverrIDeprotected voID onHandleIntent(Intent intent) {    //Registering gcm to the device    registerGCM();}private voID registerGCM() {    //Registration complete intent initially null    Intent registrationComplete = null;    //Register token is also null    //we will get the token on successfull registration    String token = null;    try {        //Creating an instanceID        InstanceID instanceID = InstanceID.getInstance(getApplicationContext());        //Getting the token from the instance ID        token = instanceID.getToken(SenderID,GoogleCloudMessaging.INSTANCE_ID_ScopE,null);        //displaying the token in the log so that we can copy it to send push notification        //You can also extend the app by storing the token in to your server        Log.w("GCMRegIntentService","token:" + token);      String  tokan = token;        //on registration complete creating intent with success        registrationComplete = new Intent(REGISTRATION_SUCCESS);        //Putting the token to the intent        registrationComplete.putExtra("token",token);    } catch (Exception e) {        //If any error occurred        Log.w("GCMRegIntentService","Registration error");        registrationComplete = new Intent(REGISTRATION_ERROR);    }    //Sending the broadcast that registration is completed    LocalbroadcastManager.getInstance(this).sendbroadcast(registrationComplete);}    }

GCMTokenRefreshListenerService类：

public class GCMTokenRefreshListenerService extends InstanceIDListenerService{  //If the token is changed registering the device again    @OverrIDe    public voID onTokenRefresh() {        Intent intent = new Intent(this,GCMRegistrationIntentService.class);        startService(intent);    }}

获取我的GCM令牌的类：

in oncreate {    //Initializing our broadcast receiver    mRegistrationbroadcastReceiver = new broadcastReceiver() {        //When the broadcast received        //We are sending the broadcast from GCMRegistrationIntentService        @OverrIDe        public voID onReceive(Context context,Intent intent) {            //If the broadcast has received with success            //that means device is registered successfully            if(intent.getAction().equals(GCMRegistrationIntentService.REGISTRATION_SUCCESS)){                //Getting the registration token from the intent                String token = intent.getStringExtra("token");                StaticContents.Gcm_token=token;                Log.e("Token",""+token);                //displaying the token as toast                Toast.makeText(getApplicationContext(),"Registration token:" + token,Toast.LENGTH_LONG).show();                //if the intent is not with success then displaying error messages            } else if(intent.getAction().equals(GCMRegistrationIntentService.REGISTRATION_ERROR)){                //        Toast.makeText(getApplicationContext(),"GCM registration error!",Toast.LENGTH_LONG).show();            } else {                //          Toast.makeText(getApplicationContext(),"Error occurred",Toast.LENGTH_LONG).show();            }        }    };    //Checking play service is available or not    int resultCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(getApplicationContext());    //if play service is not available    if(ConnectionResult.SUCCESS != resultCode) {        //If play service is supported but not installed        if(GooglePlayServicesUtil.isUserRecoverableError(resultCode)) {            //displaying message that play service is not installed            //        Toast.makeText(getApplicationContext(),"Google Play Service is not install/enabled in this device!",Toast.LENGTH_LONG).show();            GooglePlayServicesUtil.showErrorNotification(resultCode,getApplicationContext());            //If play service is not supported            //displaying an error message        } else {            //          Toast.makeText(getApplicationContext(),"This device does not support for Google Play Service!",Toast.LENGTH_LONG).show();        }        //If play service is available    } else {        //Starting intent to register device        Intent itent = new Intent(this,GCMRegistrationIntentService.class);        startService(itent);    }} //Registering receiver on activity resume@OverrIDeprotected voID onResume() {    super.onResume();    Log.w("MainActivity","onResume");    LocalbroadcastManager.getInstance(this).registerReceiver(mRegistrationbroadcastReceiver,new IntentFilter(GCMRegistrationIntentService.REGISTRATION_SUCCESS));    LocalbroadcastManager.getInstance(this).registerReceiver(mRegistrationbroadcastReceiver,new IntentFilter(GCMRegistrationIntentService.REGISTRATION_ERROR));}    //Unregistering receiver on activity paused@OverrIDeprotected voID onPause() {    super.onPause();LocalbroadcastManager.getInstance(this).unregisterReceiver(mRegistrationbroadcastReceiver);}

Output 1: When the app in visible (foreground) only one notification is received.

Output 2: When app is closed or app is in background Getting 2 notifications.

解决方法 1.一旦从GCM收到消息,就会调用GCmpushReceiverService类中的onMessageReceived函数.

用这个

String message = data.getString("message");

您正在解析并将消息存储在名为message的变量中.

问题是您将消息传递给两个函数

sendNotification(this,"traccar App");sendNotification(message);

这两个函数正在构建一个通知,并将您传递给这两个函数的消息显示为2个单独的通知.

只需注释掉这两个函数中的任何一个并进行检查.

2.为了避免重复通知,有一种方法可以处理它.
尝试改变这个 –

PendingIntent pendingIntent = PendingIntent.getActivity(this,PendingIntent.FLAG_ONE_SHOT);

至

PendingIntent pendingIntent = PendingIntent.getActivity(this,PendingIntent.FLAG_ONE_SHOT | PendingIntent.FLAG_UPDATE_CURRENT);

如果问题仍然存在,请发布您获得的有效负载.我建议使用FCM而不是GCM

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