Questions tagged as 'firebase'

Tagged questions
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check if a user exists in firebase

I am working on a project in ionic and I have done the login with googleAuthentication , when I login / register I add some data to my firestore , like the image and the email. In my mobile application I allow to change the im...
asked by 08.05.2018 / 23:26
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Fragment setContentView Android

Hello good day today was making an app connected to the database with Firebase the application is already connected and all with some tutorials that I saw on YouTube, but now I wanted to make my app more aesthetic and I added a Bottom Navigation...
asked by 20.05.2018 / 09:23
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How to declare a constructor without arguments?

I'm trying to get all the documents from firebase and convert them directly into an object but I jump with the following error:    java.lang.RuntimeException: Could not deserialize object. Class com.chdzma.changeproject.objects.Food does not...
asked by 20.05.2018 / 22:27
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Select query in database firebase Android

I have the following database in firebase Now I want to bring the titles of the cities depending on their zone number I tried to bring the data and put it in a TextView but so far it shows nothing DatabaseReference myRef = Firebase...
asked by 19.03.2018 / 15:55
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How can I validate the mail domain before authenticating with google on firebase?

I'm trying to log in with google in firebase and I do not believe user if the mail does not have a specific domain like @ example.com, I do not know if this can be done with the functions of firebase, I have not found a method of authentication...
asked by 13.04.2018 / 00:14
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ERROR - com.google.firebase.firestore.FirebaseFirestoreException: FAILED_PRECONDITION: The query requires an index

Good community, I'm starting to work with the new tool that has recently included FireBase, I mean Cloud Firestore. I'm trying to get a list of documents but I get the following error:    com.google.android.gms.tasks.RuntimeExecutionException...
asked by 10.11.2017 / 19:40
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Error opening my android studio project from another pc

I have a problem since I made my first application in android studio and so far I do not know how to solve it, my problem is that when I take my project to another PC (from the university) an error appears, I leave that error that appears...
asked by 10.11.2017 / 15:02
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duplicate entry: zzc.class

Good day! I'm using firebase and since I used its dependencies I get the following error. Error:Execution failed for task ':Customer:transformClassesWithJarMergingForRelease'. > com.android.build.api.transform.TransformException: java.util....
asked by 23.11.2017 / 17:48
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Know a key and value with For iterator (DataSnapshot), Firebase - Android Studio

I have a problem with the for iterator (DataSnapshot) since in my app I have an EditText in which when you enter a number it is compared with all the "key" in the database Firebase and if that number entered is equal to some "key" the "value"...
asked by 03.11.2017 / 01:10
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Do a where in FireBase with Ionic 3

I have my DB in firebase but I want to do a where (I know there is no WHERE in a DB NoSQL but there will be some search function), like a login that is if I enter the user and the password brings me the corresponding data of a registration.  ...
asked by 05.09.2017 / 15:51