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我已在我的应用程序中实施gcm推送通知。一切工作正常，我也收到通知。当应用程序关闭或应用程序在后台时获取两次GCM PUSH通知
问题：
- 当应用程序是在背景或终止状态我在一个时间得到2个通知。
- 当应用程序在前台获取只有1通知，因为我想要的。
应用程序应只获得1个通知作为要求，但不幸的是面临未定义的情况。
我以下代码：
GCMPushReceiverService类，用于接收消息。
public class GCMPushReceiverService extends GcmListenerService {
//This method will be called on every new message received
@Override
public 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 front
private 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, requestCode, intent, 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
}
}
manifest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 errors
public 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 constructor
public GCMRegistrationIntentService() {
super("");
}
@Override
protected 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);
}
}
班让我的GCM令牌：
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
@Override
protected 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
@Override
protected void onPause() {
super.onPause();
LocalBroadcastManager.getInstance(this).unregisterReceiver(mRegistrationBroadcastReceiver);
}
输出1：当接收到在可见（前景）只有一个通知该应用程序。
输出2：当应用程序被关闭或应用处于后台获得2个通知。
您可以显示您的日志是什么错误？如果可能，请使用[FCM]（https://firebase.google.com/docs/cloud-messaging/）而不是GCM。 –
@JaydipUmaretiya其实它的工作很好的问题是，当我在前面的应用程序获得通知一次，但是当应用程序在后台或未打开我得到相同的通知两次先生 –
嗨。你能否展示一个有效载荷？目前，我认为原因是你在'onMessageReceived（）'中调用了两个'sendNotification（）'。我不确定的是为什么它只发生在后台。 –