我正在尝试在将孩子添加到我的Firebase实时数据库时显示通知。仅当子项添加了与当前用户键匹配时，才能打开该通知。
它通常在添加子项时显示，但每次打开应用程序时（On Create方法），它都会一次又一次地显示。在某种程度上，这确实很好。但是，每当应用程序被杀或添加另一个孩子时，它都会显示，即使用户键不是当前用户。
此外，有时，当通知打开时，它会同时重复2或3次。
这是服务的代码
public class ListenTheOrderAgain extends Service {
//Firebase
FirebaseDatabase db;
DatabaseReference orders;
Query query;
FirebaseAuth auth;
FirebaseUser user;
String currenNego;
DatabaseReference socioReff;
private String negocioOn, off;
@Override
public void onCreate() {
super.onCreate();
auth = FirebaseAuth.getInstance();
user = auth.getCurrentUser();
if(user == null){
} else {
currenNego = auth.getCurrentUser().getUid();
socioReff = FirebaseDatabase.getInstance().getReference().child("Shippers").child(currenNego);
}
db = FirebaseDatabase.getInstance();
orders = db.getReference("Solicitudes");
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
if(user == null){
} else {
socioReff.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
if((dataSnapshot.exists()) && (dataSnapshot.hasChild("is_working"))){
query = orders.orderByChild("shipper").equalTo(currenNego);
query.addChildEventListener(new ChildEventListener() {
@Override
public void onChildAdded(@NonNull DataSnapshot dataSnapshot, @Nullable String s) {
//Trigger here
PedidoModel result = dataSnapshot.getValue(PedidoModel.class);
if (result.getShipper().equals(currenNego)) {
showNotification8(dataSnapshot.getKey(), result);
}
}
@Override
public void onChildChanged(@NonNull DataSnapshot dataSnapshot, @Nullable String s) {
}
@Override
public void onChildRemoved(@NonNull DataSnapshot dataSnapshot) {
}
@Override
public void onChildMoved(@NonNull DataSnapshot dataSnapshot, @Nullable String s) {
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
///end
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
return super.onStartCommand(intent, flags, startId);
}
public ListenTheOrderAgain() {
}
@Override
public IBinder onBind(Intent intent) {
// TODO: Return the communication channel to the service.
throw new UnsupportedOperationException("Not yet implemented");
}
public void showNotification8(String key, PedidoModel request) {
NotificationManager notificationManager = (NotificationManager) getApplicationContext().getSystemService(Context.NOTIFICATION_SERVICE);
Intent intent = new Intent(getApplicationContext(), MainActivity.class);
PendingIntent contentIntent = PendingIntent.getActivity(getApplicationContext(), 0, intent , 0);
int notificationId = 1;
String channelId = "channel-01";
String channelName = "Channel Name";
int importance = NotificationManager.IMPORTANCE_HIGH;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
NotificationChannel mChannel = new NotificationChannel(
channelId, channelName, importance);
notificationManager.createNotificationChannel(mChannel);
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(getApplicationContext(), channelId)
.setTicker("Test Order")
.setContentInfo("New Order")
.setContentText("Hello, you have a new Order #" + key)
.setSmallIcon(R.mipmap.ic_launcher)
.setContentIntent(contentIntent);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(getApplicationContext());
stackBuilder.addNextIntent(intent);
PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(
0,
PendingIntent.FLAG_UPDATE_CURRENT
);
mBuilder.setContentIntent(resultPendingIntent);
notificationManager.notify(notificationId, mBuilder.build());
} else if(Build.VERSION.SDK_INT < Build.VERSION_CODES.O){
Intent intents = new Intent(getApplicationContext(), MainActivity.class);
PendingIntent contentIntents = PendingIntent.getActivity(getApplicationContext(), 0, intent , 0);
NotificationCompat.Builder builders = new NotificationCompat.Builder(getApplicationContext());
builders.setAutoCancel(true).setDefaults(Notification.DEFAULT_ALL)
.setTicker("Test Order")
.setContentInfo("New Order")
.setContentText("Hello you have a new ORder #" + key)
.setSmallIcon(R.mipmap.ic_launcher)
.setContentIntent(contentIntents)
.setLights(Color.BLUE, 500, 500);
NotificationManager managers = (NotificationManager)getApplicationContext().getSystemService(Context.NOTIFICATION_SERVICE);
//IF YOU WANT TO MANY NOTFICATION SHOW, YOU NEED GIVE UNIQUE ID OFR ECHA NOTIFICAICION
int randomInt = new Random().nextInt(9999-1)+1;
managers.notify(randomInt, builders.build());
}
}
}
这就是我从Main活动中调用服务的方式：
//Call service
Intent service = new Intent(MainActivity.this, ListenTheOrderAgain.class);
startService(service);
请帮我！
我认为最好创建一个FirebaseMessagingService：
在清单中：
<service
android:name=".ListenTheOrderAgain"
android:enabled="true"
android:exported="true">
<intent-filter>
<action android:name="com.google.firebase.MESSAGING_EVENT" />
</intent-filter>
</service>
在您的服务中：
public class ListenTheOrderAgain extends FirebaseMessagingService {
@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
super.onMessageReceived(remoteMessage);
//your code for reading notifications
}
而且您不必调用startService。这项服务没有它。