firebase-realtime-database

问题 I'm making a simple app for my school that the user will rate the service and press submit, which sends the data to firebase, but at the same time, resets the value of the rating bar so the next user can rate again. But I am having some difficulties and misunderstandings. Please Help! Here is my main activity code: package com.timothy.ratingch; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android

问题 var ref=db.ref("users"); var upref = ref.child("-KXpWvL3cgzHvFYgArTW"); upref.update({ "name": "Ayaz" }); I m using this I am creating a reference to the key but this is not the right way , in my db i have users and then i have keys under that i have the name. Here I am creating a reference directly to the key and updating it. the structure of my db is: users .... -->key ............. -->name:"" So how can I update a specific name.? 回答1: You'll need to know a property of the user that you

问题 On my RecyclerView are CardViews containing details about a certain exercise and on my CardView, there is an ImageDeleteBtn beside it. How do I delete the CardView from the RecyclerView and on Firebase? This is my Adapter package com.lim.fiture.fiture.adapters; import android.content.Context; import android.support.v7.widget.RecyclerView; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.EditText; import android.widget

问题 On my RecyclerView are CardViews containing details about a certain exercise and on my CardView, there is an ImageDeleteBtn beside it. How do I delete the CardView from the RecyclerView and on Firebase? This is my Adapter package com.lim.fiture.fiture.adapters; import android.content.Context; import android.support.v7.widget.RecyclerView; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.EditText; import android.widget

问题 I used FirebaseRecyclerAdapter to get all the childs of "Pro" using a Model class named " Spacecraft" and now I want to retrieve all the candidates into a child of Pro like "1" I created a public static "candidat" into "Spacecraft" and I used the setters and getters but still the same error This is my database: this is the Model Class public class Spacecraft{ private String name; private String desc; private String last; private candidat candidat; public Spacecraft.candidat getCandidat() {

问题 I can't save new data ("messages") to current user. my code for push user info to Firebase var ref: FIRDatabaseReference! = FIRDatabase.database().reference() self.ref.child("Users").child("UserID").childByAutoId().setValue(["Name": userName, "Email": userEmail]) code for push messages to Firebase var messageRef: FIRDatabaseReference = FIRDatabase.database().reference() let uid = FIRAuth.auth()?.currentUser?.uid messageRef.child("Users").child("UserID").child(self.uid!).child("Messages")

问题 I have usersProfile table, where save data by uid How to select all users uid and data? I can select only Authorized users data. getUsersData(token: string) { const userId = this.authService.getActiveUser().uid; return this.http.get('https://mainapp.firebaseio.com/usersProfile/' + userId + '.json?auth=' + token) .map((response: Response) => { const usersData: UsersData[] = response.json() ? response.json(): []; return usersData; }) .do((userData : UsersData[]) => { if (userData) { this

问题 I am trying to make a register page. Before registering that user I will try to validate the username and email do not exist in the database. But I somehow cannot set the variable to be false when the username/email already exist so it will end up still registering the user. How can I do this? Please guide me on this. Checking if username and email already exist before register user: if (!checkIfUsernameExists(userName) && !checkIfEmailExists(userEmail)){ registerUser(); } Method for checking

问题 I have a single project but with 4 different environments (Dev,Stagging,QA,Production). I have given their (environment's webservice url) paths from mobile's setting. Now I want to use different GoogleService-info.plist for all these different environments. Like when I select Dev from backend the project should take GoogleService-Info.plist of Dev project only. These GoogleService-Info.plists are created on 4 different accounts. Project should take the path of GoogleService-info.plist

问题 I have a single project but with 4 different environments (Dev,Stagging,QA,Production). I have given their (environment's webservice url) paths from mobile's setting. Now I want to use different GoogleService-info.plist for all these different environments. Like when I select Dev from backend the project should take GoogleService-Info.plist of Dev project only. These GoogleService-Info.plists are created on 4 different accounts. Project should take the path of GoogleService-info.plist