firebase-realtime-database

问题 i have an e-commerce android app and i have all orders(state = shipped & not shipenter image description hereped) which are received by admin in recycler view from Firebase realtime database. Now, i want to get shipped orders(state = shipped) in another activity and i dont know how to retrieve only those orders which have state = shipped. I have tried several things but cant get around this. So anyone could help please answer. My recyclerView code looks this this: shippedOrdersRef =

问题 I'm trying to learn ajax and I don't know back end language yet so I'm using firebase from google and I am running my code through localhost:8000 using python 2.7. I'm trying to GET/POST to this server: https://ajax-practice-1f1b9.firebaseio.com/ If you can't access it, my JSON looks like this: [ { "id": 1, "name" : "Will", "drink": "American with creme" }, { "id": 2, "name": "Donat", "drink": "Vanilla Macchiato" } ] here's my HTML and javascript $(function() { $.ajax({ type: 'GET', url:

问题 When creating a APK with proguard enabled, the following exception is thrown when using the FirebaseRecyclerAdapter from the Firebase-UI library ( com.firebaseui:firebase-ui:0.3.0 ): java.lang.RuntimeException: java.lang.NoSuchMethodException: <init> [class android.view.View] at com.firebase.ui.FirebaseRecyclerAdapter.onCreateViewHolder(FirebaseRecyclerAdapter.java:168) The debug version (without proguard) works fine. Who has a working proguard config for Firebase-UI? My current proguard

问题 When creating a APK with proguard enabled, the following exception is thrown when using the FirebaseRecyclerAdapter from the Firebase-UI library ( com.firebaseui:firebase-ui:0.3.0 ): java.lang.RuntimeException: java.lang.NoSuchMethodException: <init> [class android.view.View] at com.firebase.ui.FirebaseRecyclerAdapter.onCreateViewHolder(FirebaseRecyclerAdapter.java:168) The debug version (without proguard) works fine. Who has a working proguard config for Firebase-UI? My current proguard

问题 This question already has an answer here : Flutter: Firebase Real-Time database orderByChild has no impact on query result (1 answer) Closed 4 months ago . I'm creating a simple application with Firebase Realtime database where a user inputs a text and it gets added to a list of chats. void main() => runApp(MyApp()); class MyApp extends StatelessWidget { // This widget is the root of your application. @override Widget build(BuildContext context) { return MaterialApp( title: 'Flutter Demo',

问题 This question already has an answer here : Flutter: Firebase Real-Time database orderByChild has no impact on query result (1 answer) Closed 4 months ago . I'm creating a simple application with Firebase Realtime database where a user inputs a text and it gets added to a list of chats. void main() => runApp(MyApp()); class MyApp extends StatelessWidget { // This widget is the root of your application. @override Widget build(BuildContext context) { return MaterialApp( title: 'Flutter Demo',

问题 I created a Broadcast Receiver Which is inside the Service Class (Because of the Android Broadcast receiver restrictions Broadcast receiver stops after while, So I created Background Service , with foreground Service Notification Restriction in Android Oreo=< ). This Broadcast Receiver Listens to Phone Call States Changes IDLE, OFFHOOK, RINGING . According to the Phone call states changes(If the call ends), I get the last call details in the Cursor and Send to that details into the Firebase

问题 I created a Broadcast Receiver Which is inside the Service Class (Because of the Android Broadcast receiver restrictions Broadcast receiver stops after while, So I created Background Service , with foreground Service Notification Restriction in Android Oreo=< ). This Broadcast Receiver Listens to Phone Call States Changes IDLE, OFFHOOK, RINGING . According to the Phone call states changes(If the call ends), I get the last call details in the Cursor and Send to that details into the Firebase

问题 it's probably a trivial question, I try to decode a json from a Firebase snapshot, here is the structure of the json : firebaseKey1 : {img1:value1} firebaseKey2 : {img2:value2} firebaseKey3 : {img3:value3} Here is what I tried: DatabaseReference firebaseRef = FirebaseDatabase.instance.reference(); firebaseRef.child('...').once().then((DataSnapshot snapshot) { Map<dynamic,dynamic> map = snapshot.value; map.forEach((key, jsonString) { print('$key: $jsonString'); // jsonString = {img1:value1} /

问题 Closed . This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 8 days ago . Improve this question Is there any way to clear/delete all data stored using MVVM pattern? My app looks like Login Activity -> Main Activity -> fragments(each fragment: Firebase singleton +repository singleton+view model + view) All the data is stored as livedata and when I